CN-122029286-A - Method for producing biogas from residues of polymer blends comprising cellulose-based polymers

CN122029286ACN 122029286 ACN122029286 ACN 122029286ACN-122029286-A

Abstract

In a first aspect, the present invention relates to a process for the preparation of biogas comprising providing a polymer blend comprising (i) a polyester and (ii) optionally one or more components selected from the group consisting of a second polymer, a colorant and a filler, (iii) a cellulose-based third polymer, wherein the optional second polymer (ii) and the cellulose-based third polymer (iii) are different from each other and from the polyester of (i), the process comprising a step (e) which relates to the lean polyester obtained in the preceding step (c) and which comprises the cellulose-based third polymer and optionally the filler or the residue of the polymer blend of a part of the filler to prepare biogas.

Inventors

S. Witzer
T.Mei
H.S. Mangold
A. Kunst
I. til

Assignees

巴斯夫欧洲公司

Dates

Publication Date: 20260512
Application Date: 20240927
Priority Date: 20230929

Claims (16)

1. A method for producing biogas, the method comprising There is provided a polymer blend of a polymer and a blend of polymers, the polymer blend comprises (I) Polyester, and (Ii) Optionally one or more components selected from the group consisting of a second polymer, a colorant, and a filler; (iii) A cellulose-based third polymer; wherein the optional second polymer (ii) and the cellulose-based third polymer (iii) are different from each other and from the polyester of (i); The method comprises the following steps: (a) Providing the polymer blend and providing a solvent system comprising gamma valerolactone or dimethyl sulfoxide or a mixture of gamma valerolactone and dimethyl sulfoxide, the solvent system comprising less than 10 wt-%, preferably less than 8 wt-%, more preferably less than 6 wt-%, more preferably less than 5 wt-%, more preferably less than 4 wt-%, more preferably less than 3 wt-%, more preferably less than 2 wt-%, more preferably less than 1 wt-% of one or more acidic and/or basic components, based on the total weight of the solvent system; (b) Optionally contacting the polymer blend with the solvent system at a temperature T1 of < 170 ℃, thereby obtaining a solvent system enriched in dissolved second polymer and/or colorant and optionally the filler or a portion of the filler, and a residue of the polymer blend depleted in said second polymer and/or colorant and optionally the filler or a portion of the filler and comprising the polyester, optionally the cellulose-based third polymer and optionally the filler or a portion of the filler; (c) Contacting the polymer blend provided in (a) or alternatively the residue of the polymer blend obtained in (b) with the solvent system at a temperature T2 > 170 ℃ to obtain a solvent system enriched in dissolved polyester and optionally comprising the filler or part of the filler compared to the solvent system provided in (a), and a residue of the polymer blend depleted in polyester and comprising the cellulose-based third polymer and optionally the filler or part of the filler; (d) Optionally precipitating polyester from the solvent system enriched in dissolved polyester obtained in (c), thereby obtaining a precipitated polyester and a solvent system depleted in dissolved polyester and optionally comprising the filler or a part of the filler; (e) Producing biogas from the residue of the polymer blend which is depleted in polyester obtained in (c) and comprises the cellulose-based third polymer and optionally the filler or a part of the filler; Wherein the polymer blend provided in (a) or alternatively the residue of the polymer blend obtained in (b) is not contacted with an acidic component and/or a basic component before (b), between steps (b) and (c) and before step (c).
2. The process of claim 1, wherein the residue of the polymer blend obtained in (c) and comprising the cellulose-based third polymer and optionally the filler or a part of the filler comprises 100 wt-%, less than 10 wt-%, preferably less than 8 wt-%, more preferably less than 6 wt-%, more preferably less than 5 wt-%, more preferably less than 4 wt-%, more preferably less than 3 wt-%, more preferably less than 2 wt-%, more preferably less than 1 wt-% of one or more acidic and/or basic components based on the total weight of the residue, and/or wherein the precipitated polyester obtained in (d) comprises 100 wt-%, less than 10 wt-%, preferably less than 8 wt-%, more preferably less than 6 wt-%, more preferably less than 5 wt-%, more preferably less than 4 wt-%, more preferably less than 3 wt-%, more preferably less than 1 wt-% of one or more acidic and/or basic components based on the total weight of the precipitated polyester.
3. The method of claim 1 or 2, wherein the third cellulose-based polymer is selected from the group consisting of a natural cellulose-based polymer, a synthetic cellulose-based polymer and a mixture of one or more natural cellulose-based polymers and one or more synthetic cellulose-based polymers, wherein the natural cellulose-based polymer is preferably selected from the group consisting of cotton, cellulose, lignin, linen, viscose and a mixture of two or more thereof, and wherein the synthetic cellulose-based polymer is preferably viscose, wherein the cellulose-based polymer preferably comprises at least cotton, more preferably at least 65 wt-%, more preferably at least 70 wt-%, more preferably at least 75 wt-%, more preferably at least 80 wt-%, more preferably at least 85 wt-%, more preferably at least 90 wt-%, more preferably at least 95 wt-% of the cellulose-based polymer is cotton, more preferably the cellulose-based polymer is cotton.
4. A process as claimed in any one of claims 1 to 3, wherein the preparation of biogas from the residue of the polymer blend according to (e) comprises microbial fermentation, more preferably anaerobic microbial fermentation.
5. The method of any one of claims 1 to 4, comprising, after (e) (F) Methane is separated from the biogas obtained in (e) by one or more purification and/or concentration steps, whereby CH 4 is obtained with a purity of at least 85 vol-%, more preferably at least 90 vol-%, even more preferably at least 95 vol-%, based on the total volume of the gas phase comprising methane (CH 4 ).
6. The method of any one of claims 1 to 5, wherein at least 50 wt-%, preferably at least 60 wt-%, more preferably at least 70 wt-%, more preferably at least 80 wt-%, more preferably at least 90 wt-%, more preferably at least 95 wt-%, more preferably at least 99 wt-% of the solvent system consist of gamma valerolactone and/or DMSO, based on the total weight of the solvent system as 100 wt-%.
7. The process of any of claims 1 to 6, wherein the polyester is based on 1, 4-butanediol or 1, 2-ethanediol, more preferably the polyester according to (i) is selected from the group consisting of 1, 4-butanediol and terephthalic acid based polymers (polybutylene terephthalate, PBT), 1, 2-ethanediol and terephthalic acid based polymers (polyethylene terephthalate, PET), copolymers of 1, 4-butanediol, adipic acid and terephthalic acid (polybutylene adipate terephthalate, PBAT), 1, 2-ethanediol and 2, 5-furandicarboxylic acid based polymers (polyethylene furandicarboxylate, PEF) and mixtures of two or more of these (co) polymers, more preferably the polyester comprises at least PET and/or PBT, more preferably the polyester is PET or PBT or a mixture of PET and PBT; And/or Wherein the second polymer is selected from the group consisting of Polyurethane (PU), polyethylene glycol (PEG), polytetrahydrofuran (pTHF), mixtures of these polymers, and copolymers of these polymers, wherein the second polymer is more preferably PU or a copolymer of PU and PEG and/or pTHF, more preferably spandex (PU and PEG or a copolymer of PU and pTHF); And/or Wherein the polymer blend further comprises a fourth polymer (iv), wherein the fourth polymer is different from the third cellulose-based polymer of the polyesters (ii), (iii) and the second polymer of (ii), wherein the fourth polymer is selected from the group consisting of polypropylene (PP), polyethylene (PE), polyamide (PA), and mixtures of two or more thereof.
8. A process for producing biogas from cellulose-based polymers separated from a polymer blend, the process comprising (I) Separating a cellulose-based polymer from a polymer blend comprising the cellulose-based polymer and at least one additional polymer different from the cellulose-based polymer, thereby obtaining a separated cellulose-based polymer fraction; (ii) Treating the cellulose-based polymer fraction obtained in (i) with a solvent system comprising gamma valerolactone or dimethyl sulfoxide or a mixture of gamma valerolactone and dimethyl sulfoxide, comprising 100 wt-%, less than 10 wt-%, preferably less than 8 wt-%, more preferably less than 6 wt-%, more preferably less than 5 wt-%, more preferably less than 4 wt-%, more preferably less than 3 wt-%, more preferably less than 2 wt-%, more preferably less than 1 wt-% of one or more acidic and/or basic components, based on the total weight of the solvent system, thereby obtaining a treated cellulose-based polymer fraction; (iii) Preparing biogas from the treated cellulose-based polymer fraction obtained in (ii); Wherein the polymer blend or the separated cellulose-based polymer fraction is not contacted with an acidic component and/or a basic component before step (i), during step (i) and between steps (i) and (ii).
9. The method of claim 8, wherein the treated cellulose-based polymer fraction obtained in (ii) comprises less than 10 wt-%, preferably less than 8 wt-%, more preferably less than 6 wt-%, more preferably less than 5 wt-%, more preferably less than 4 wt-%, more preferably less than 3 wt-%, more preferably less than 2 wt-%, more preferably less than 1 wt-% of one or more acidic and/or basic components based on the total weight of the treated cellulose-based polymer fraction.
10. Biogas, preferably biogas comprising methane, obtained or obtainable by the method of any one of claims 1 to 7 or 8 or 9.
11. Use of biogas, preferably methane comprised in the biogas, as a carbon source and/or a hydrogen source, preferably after purification and/or concentration, as an energy source, preferably a thermal energy source, for one or more of the steps (b) to (d), preferably biogas comprising at least 40 vol-% methane.
12. A polyester obtainable or obtained by the process of any one of claims 1 to 7 or 8 or 9.
13. Use of the polyester according to claim 12 for textile applications, fiber applications, packaging applications, plastic applications, automotive applications, electronic applications, preferably for the production of food packaging, beverage packaging, clothing, footwear, wires, cables, preferably for textile applications, fiber applications, packaging applications, plastic applications, more preferably for the production of food packaging, beverage packaging, clothing and footwear.
14. A method for preparing a product, the method comprising (I) Providing the polyester of claim 12; (II) from the polyesters provided in (I) textiles, fibers, packaging, plastics, automotive parts, electronic parts.
15. The method of any one of claims 1 to 7, wherein (b) comprises: (b.1) contacting the polymer blend with the solvent system at a temperature T1 of < 170 ℃, thereby obtaining a solvent system enriched in dissolved second polymer and/or colorant and optionally the filler or a part of the filler, and a residue of the polymer blend depleted in said second polymer and/or colorant and optionally the filler or a part of the filler and comprising the polyester, the cellulose-based third polymer and optionally the filler or a part of the filler; (b.2) separating the solvent system obtained in (b.1) enriched in dissolved second polymer and/or colorant and optionally the filler or part of the filler from the residue, preferably by a physical separation method, thereby obtaining a separated solvent system enriched in dissolved second polymer and/or colorant and optionally the filler or part of the filler compared to the solvent system provided in (a), and (B.3) separating the second polymer from the solvent system, thereby obtaining an isolated fraction comprising the second polymer.
16. The method of any one of claims 1 to 7 or 15, comprising the further step of: Converting the second polymer and/or the recovered polyester, To obtain one or more monomers, polymers or polymer products; Wherein preferably the monomer is a diol or a polyol, preferably butanediol, an aldehyde, preferably formaldehyde, a di-or polyisocyanate, preferably methylene diphenyl diisocyanate (MDI), polymeric methylene diphenyl diisocyanate (pMDI), toluene Diisocyanate (TDI), hexamethylene Diisocyanate (HDI) or isophorone diisocyanate (IPDI), an amide, preferably caprolactam, an olefin, preferably styrene, ethylene and norbornene, an alkyne, (di) ester, preferably methyl methacrylate, a mono-or di-acid, preferably adipic acid or terephthalic acid, a diamine, preferably hexamethylenediamine, nonylenediamine, or a sulfone, preferably 4,4' -dichlorodiphenyl sulfone; And/or Wherein preferably the polymer is and/or the polymer product comprises Polyamide (PA), preferably PA 6 or PA 66, a polyisocyanate polyaddition product, preferably Polyurethane (PU), thermoplastic Polyurethane (TPU), polyurea or Polyisocyanurate (PIR), low Density Polyethylene (LDPE), high Density Polyethylene (HDPE), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyvinyl acetate (PVA), polystyrene (PS), polyacrylonitrile butadiene styrene (ABS), polystyrene acrylonitrile (SAN), polyacrylate styrene acrylonitrile (ASA), polytetrafluoroethylene (PTFE), poly (methyl acrylate) (PMA), poly (methyl methacrylate) (PMMA), polybutadiene (BR, PBD), poly (cis-1, 4-isoprene), poly (trans-1, 4-isoprene), polyoxymethylene (POM), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polybutylene adipate terephthalate (PBAT), polyester (PES), polyether sulfone (PESU), polyhydroxyalkanoate (PHA), poly-3-hydroxybutyrate (P3 HB), poly-4-hydroxy butyrate (PHHB), poly-4-hydroxy butyrate (PHV-hydroxy butyrate), poly (PHV-4-hydroxy butyrate) and PHH-hydroxy-hexanoate (PHH), polyhydroxyoctanoate (PHO), polylactic acid (PLA), polysulfone (PSU), polyphenylsulfone (PPSU), polycarbonate (PC), polyetheretherketone (PEEK), poly (p-phenylene ether) (PPO), poly (p-phenylene ether) (PPE), or copolymers or mixtures thereof; And/or Wherein preferably the polymer and/or the polymer product is or is part of: Automotive parts, preferably cylinder head covers, engine hoods, housings for charge air coolers, charge air cooler baffles, air inlet pipes, intake manifolds, connectors, gears, fan wheels, coolant tanks, housings, housing parts for heat exchangers, coolant coolers, charge air coolers, thermostats, water pumps, heat sinks, fasteners, parts of battery systems for electric vehicles, dashboards, steering column switches, seats, head rests, center consoles, transmission parts, door modules, automotive A, B, C or D pillar covers, spoilers, door handles, exterior rear view mirrors, windshield wipers, windshield wiper protection housings, decorative grilles, cover strips, roof rails, window frames, sunroof frames, antenna panels, headlights and taillights, engine hoods, cylinder head covers, intake manifolds, airbags, bumpers or coatings; cloth, preferably shirts, pants, jerseys, boots, shoes, soles, tights or jackets; Electrical components, preferably electrical or electronic passive or active components, circuit boards, printed circuit boards, housing components, foils, wires, switches, plugs, sockets, power distributors, relays, resistors, capacitors, inductors, bobbins, lamps, diodes, LEDs, transistors, connectors, voltage regulators, integrated Circuits (ICs), processors, controllers, memories, sensors, micro-switches, micro-buttons, semiconductors, reflector housings for Light Emitting Diodes (LEDs), fasteners, gaskets, bolts, strips, slide-in guides, screws, nuts, film hinges, spring hooks (snap-in) or spring tongues for electrical or electronic components; -consumer products, agricultural products or pharmaceutical products, preferably tennis strings, rock climbing ropes, mane, brushes, artificial grass, 3D printed filaments, mowers, zippers, hook and loop fasteners, paper machine clothing, extrusion coatings, fishing lines, fishing nets, offshore lines and ropes, vials, syringes, ampoules, bottles, sliding elements, spindle nuts, chain conveyors, sliding bearings, rollers, wheels, gears, rollers, ring gears, screws and spring dampers, hoses, pipes, cable jackets, sockets, switches, cable ties, fan wheels, carpets, cosmetic boxes or bottles, mattresses, cushioning, insulation, detergents, dishwasher detergent blocks or powders, shampoos, body washes, shower gels, soaps, fertilizers, fungicides or pesticides; packaging for the food industry, preferably single-layer or multilayer blown films, cast films (single-layer or multilayer), biaxially stretched films or laminated films, or Structural parts, preferably rotor blades, insulating materials, frames, shells, walls, coatings or separating walls.

Description

Method for producing biogas from residues of polymer blends comprising cellulose-based polymers In a first aspect, the invention relates to a process for producing biogas comprising providing a polymer blend comprising (i) a polyester and (ii) optionally one or more components selected from the group consisting of a second polymer, a colorant and a filler, (iii) a cellulose-based third polymer, wherein the optional second polymer (ii) and the cellulose-based third polymer (iii) are different from each other and from the polyester of (i), the process comprising (a) providing a polymer blend and providing a solvent system comprising Gamma Valerolactone (GVL) or dimethyl sulfoxide (GVL) or a mixture of GVL and DMSO, the solvent system comprising 100 wt-% less than 10 wt-% based on the total weight of the solvent system, Preferably less than 8 wt-%, more preferably less than 6 wt-%, more preferably less than 5 wt-%, more preferably less than 4 wt-%, more preferably less than 3 wt-%, more preferably less than 2 wt-%, more preferably less than 1 wt-% of one or more acidic and/or basic components, (b) optionally contacting the polymer blend with a solvent system at a temperature T1 of < 170 ℃ to obtain a solvent system enriched in dissolved second polymer and/or colorant and optionally filler or part of filler, and a solvent system depleted of said second polymer and/or colorant and optionally filler or part of filler and comprising polyester, Contacting the residue of the polymer blend provided in (a) or alternatively obtained in (b) with a solvent system at a temperature T2 > 170 ℃ to obtain a solvent system enriched in dissolved polyester and optionally comprising filler or part of filler as compared to the solvent system provided in (a), and a residue of the polymer blend depleted in polyester and comprising the cellulose-based third polymer and optionally comprising filler or part of filler, (d) optionally precipitating polyester from the solvent system enriched in dissolved polyester as obtained in (C) to obtain a solvent system depleted in dissolved polyester and optionally comprising filler or part of filler, (e) obtaining a biogas blend enriched in dissolved polyester and optionally comprising filler or part of filler as obtained in (C) and optionally comprising the third polymer and optionally part of filler or part of filler, wherein the residue of the polymer blend is prepared prior to (b), The polymer blend provided in (a) or alternatively the residue of the polymer blend obtained in (b) is not contacted with an acidic component and/or a basic component between steps (b) and (c) and before step (c). The second aspect of the present invention relates to a process for the preparation of biogas from a cellulose-based polymer separated from a polymer blend, which process comprises (i) separating the cellulose-based polymer from a polymer blend comprising the cellulose-based polymer and at least one further polymer different from the cellulose-based polymer, thereby obtaining a separated cellulose-based polymer fraction, (ii) treating the cellulose-based polymer fraction obtained in (i) with a solvent system comprising Gamma Valerolactone (GVL), thereby obtaining a treated cellulose-based polymer fraction, which solvent system comprises 100 wt-%, less than 10 wt-%, based on the total weight of the solvent system, Preferably less than 8 wt-%, more preferably less than 6 wt-%, more preferably less than 5 wt-%, more preferably less than 4 wt-%, more preferably less than 3 wt-%, more preferably less than 2 wt-%, more preferably less than 1 wt-% of one or more acidic and/or basic components, (iii) preparing biogas from the treated cellulose-based polymer fraction obtained in (ii), wherein the polymer blend or the separated cellulose-based polymer fraction is not contacted with the acidic and/or basic components before, during and between step (i) and (ii). In a third aspect, the present invention relates to biogas, preferably biogas comprising methane, obtainable or obtained by the method of the first or second aspect. A fourth aspect of the invention relates to the use of biogas according to the third aspect as a carbon source and/or a hydrogen source, and/or the use of biogas according to the third aspect as an energy source, preferably a thermal energy source, for one or more of steps (b) to (d). A fifth aspect of the invention relates to a polyester obtainable or obtained by the process of the first or second aspect. A sixth aspect of the invention relates to the use of the polyester of the fifth aspect for textile applications, fiber applications, packaging applications, plastic applications, automotive applications, and/or electronic applications. In a seventh aspect, the present invention relates to a process for preparing a product comprising (I) providing the polyester of the fifth aspect, and (II) preparing a textile, fiber, packaging, plastic, automotive part, electronic part from the p