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CN-122003487-A - Method for storing one or more biological oils

CN122003487ACN 122003487 ACN122003487 ACN 122003487ACN-122003487-A

Abstract

The present invention relates to a method for storing one or more bio-oils and a storage unit for storing one or more bio-oils. The invention further relates to the use of one or more stored bio-oils obtained by said method as raw material for a cracker.

Inventors

  • M. Hagg
  • BACHTLER MICHAEL
  • BECKER HEIKE
  • F. Hulsman
  • S. Wagner

Assignees

  • 巴斯夫欧洲公司

Dates

Publication Date
20260508
Application Date
20240926
Priority Date
20231006

Claims (15)

  1. 1.A method for storing one or more biological oils, the method comprising (I) Providing one or more bio-oils O bio ; (ii) Delivering at least a portion P1-P1 of the one or more bio-oils O bio containing the one or more bio-oils to a storage tank S (T) comprised in a storage unit S for a period of time Δt1, the storage unit S further comprising a pump S (P); (iii) Storing P1 in the tank S (T) of S for a period of time Δt2; wherein during the period Δt2, (iii) further comprises Removing a portion P2 of P1 from the tank S (T) and reintroducing a portion P3 of P2 into the tank S (T) -P2 and P3 containing the one or more bio-oils, wherein removing P2 and reintroducing P3 is performed with the pump S (P) for a period of time Δt3, wherein Δt2 is greater than or equal to Δt3; wherein the tank S (T) comprises a top portion T1, a middle portion T2 and a bottom portion T3, wherein T1 is adjacent to T2 and T2 is adjacent to T3, wherein in T3 the bottom of S (T) is an inclined surface, and wherein during Δt2 the method further comprises The corrosion status of the tank S (T) is periodically determined by visual testing and/or measuring an average linear corrosion rate vl (millimeters/year) as determined in example 1, for example.
  2. 2. The method of claim 1, wherein the one or more bio-oils O bio provided in (i) are obtainable or obtained from biomass via a process comprising pyrolysis or hydrothermal liquefaction.
  3. 3. The method of claim 1 or 2, wherein the one or more bio-oils O bio provided in (i) have a water content of at most 50 wt-%, or at most 40 wt-%, preferably at most 30 wt-%, preferably at most 20%, more preferably at most 10 wt-%, more preferably at most 5 wt-%, more preferably at most 1 wt-%, based on the weight of the bio-oil.
  4. 4. The method of any one of claims 1 to 3, further comprising, prior to (ii), mixing the one or more bio-oils O bio provided in (i) with an additive that is one or more amphiphilic compounds comprising at least one non-polar residue selected from C 6 to C 26 alkyl and/or alkylene and at least one polar residue comprising at least one heteroatom selected from the group consisting of N and O.
  5. 5. The method of any one of claims 1 to 4, wherein the tank S (T) is vented with a gas atmosphere, more preferably the gas atmosphere is an inert gas, more preferably nitrogen.
  6. 6. The method of any one of claims 1 to 5, wherein the removing of a portion P2 of P1 from the reservoir S (T) according to (iii) is performed with the pump S (P) at an outlet means for removing P2, said outlet means being located at the bottom of the inclined surface in T3.
  7. 7. The method of claim 6, wherein removing a portion P2 of P1 from the tank S (T) according to (iii) is performed periodically or continuously, preferably continuously.
  8. 8. The method of any one of claims 1 to 5, wherein removing a portion P2 of P1 from the reservoir S (T) is performed with the pump S (P) at an outlet means for removing P2, said outlet means being located at a height H (o) in T2, which is in the range of 0.4 to 1.25 m, preferably in the range of 0.5 to 1m, H (o) being the axial distance between the bottom of S (T) and the outlet means for removing P2.
  9. 9. The method of claim 8, wherein during the time period Δt2, (iii) further comprises A portion P4-P4 of P1 is removed from S (T) comprising water, wherein the removal is performed at the bottom of the inclined surface in the bottom portion T3.
  10. 10. The method of any one of claims 1 to 9, wherein in T3 of S (T), the inclined surface is a surface inclined at an angle in the range of 0.5 ° to 20 °, preferably in the range of 0.75 ° to 10 °, more preferably in the range of 0.80 ° to 5 °, more preferably in the range of 0.85 ° to 2 °, more preferably in the range of 0.90 ° to 1.5 °.
  11. 11. The process according to any one of claims 1 to 10, wherein in S (T) the maximum temperature Tmax (P1) in terms of ℃ of the liquid phase of P1 is 80 ℃, preferably 60 ℃, more preferably 40 ℃, wherein in S (T) the minimum temperature Tmin (P1) in terms of ℃ of the liquid phase of P1 is-10 ℃, preferably 0 ℃, more preferably 5 ℃.
  12. 12. The method according to any one of claims 1 to 11, wherein in S (T) an overpressure is applied, which is in the range of 100 to 1 mbar, more preferably in the range of 50 to 5 mbar, more preferably in the range of 20 to 10 mbar.
  13. 13. The method of any one of claims 1 to 12, wherein the reservoir S (T) is made of one or more of carbon steel and stainless steel.
  14. 14. Use of one or more stored bio-oils obtained according to the process of any one of claims 1 to 13 as feedstock for a cracker, preferably a thermal cracker or catalytic cracker, optionally after a further refining step, preferably after a further hydrotreating step.
  15. 15. A storage unit for storing one or more bio-oils O bio , preferably according to the method of any one of claims 1 to 13, the storage unit comprising -A tank S (T), wherein the tank S (T) comprises a top portion T1, a middle portion T2 and a bottom portion T3, wherein T1 is adjacent to T2 and T2 is adjacent to T3, wherein in T3 the bottom of S (T) is an inclined surface; -a pump S (P); -inlet means for feeding at least a portion P1 of O P into S (T); -outlet means for removing a portion P2 of P1 from S (T); Inlet means for introducing a portion P3 of P2 into S (T).

Description

Method for storing one or more biological oils The present invention relates to a method for storing one or more bio-oils and a storage unit for storing one or more bio-oils. The invention further relates to the use of one or more stored bio-oils obtained by said method as raw material for a cracker. Bio-oils obtained from different types of biomass tend to be corrosive to vessels made of steel (e.g., devices for storing, transporting, guiding, handling bio-oils), especially vessels made of carbon steel and low alloy steel. The reasons for the undesirable corrosiveness of bio-oils are manifold. Biological oils have a higher content of potentially corrosive components such as water, one or more halogens, sulfur, and organic acids than oils from fossil sources (e.g., crude oil). In addition, the Total Acid Number (TAN) of biological oils is higher than oils from fossil sources (e.g., crude oil). The differences in composition result in increased corrosion of the bio-oil by the vessel systems (such as vessels, pipes, reactors and heat exchangers) made of steel, especially those made of carbon steel and low alloy steel, during storage, transportation and handling of the bio-oil. Such corrosion is detrimental to such sealing units and bio-oil. Accordingly, there is a continuing need to provide improved methods for treating biological oils and particularly for storing such biological oils. It is therefore an object of the present invention to provide an improved method for storing one or more bio-oils which prevents corrosion in tanks and pipes and which is cost effective. It has surprisingly been found that according to the method of the invention, lower corrosion occurs. This is possible because the bio-oil is stored by recirculation and the tank has an inclined bottom surface. Accordingly, the present invention relates to a method for storing one or more bio-oils, the method comprising (I) Providing one or more bio-oils O bio; (ii) Delivering at least a portion P1 of the one or more bio-oils O bio provided according to (i) (P1 comprising the one or more bio-oils) to a storage tank S (T) comprised in a storage unit S for a period of time Δt1, the storage unit S further comprising a pump S (P); (iii) Storing P1 in the tank S (T) of S for a period of time Δt2; wherein during the period Δt2, (iii) further comprises Removing a portion P2 of P1 from the tank S (T) and reintroducing a portion P3 of P2 into the tank S (T) (P2 and P3 contain the one or more bio-oils), wherein the removal of P2 and reintroduction of P3 is performed with the pump S (P) for a period of time Δt3, wherein Δt2 is greater than or equal to Δt3; Wherein the tank S (T) comprises a top portion T1, a middle portion T2 and a bottom portion T3, wherein T1 is adjacent to T2 and T2 is adjacent to T3, wherein in T3 the bottom of S (T) is an inclined surface; and wherein during Δt2 the method optionally further comprises The corrosion status of the tank S (T) is periodically determined by visual testing and/or measuring an average linear corrosion rate vl (millimeters/year) as determined in example 1, for example. In the context of the present invention, it was found that the inclined bottom surface of the tank in the storage unit S and the recirculation of bio-oil via the pump in the storage unit allows to avoid corrosion of the tank wall. The one or more bio-oils O bio provided according to (i) are obtainable or obtained from biomass by performing mechanical and physical operations as well as chemical processes. Bio-oils are liquid compound mixtures that mainly contain highly oxidized compounds (e.g., glycerides, esters, carboxylic acids, phenols, alcohols, ketones, aldehydes, furans, and sugars) and water, with the exact composition depending on the biomass feedstock and the processing steps applied. The term bio-oil includes in particular vegetable oils like rapeseed oil, sunflower oil, soybean oil, corn oil, castor oil, jatropha oil, palm oil and macauba palm (kernel or pulp) oil, as well as processing residues thereof like palm fatty acid distillates, waste edible oils, tall oils, animal fats, and oils obtained by thermochemical conversion of biomass (e.g. biomass-derived pyrolysis oils or hydrothermal liquefaction oils), and mixtures thereof. Vegetable oils consist mainly of glycerides, in particular triglycerides (esters formed from glycerol and fatty acids). The term biomass includes any material of plant or animal origin, such as plants or parts thereof like crops, wood or residues thereof, marine organisms like algae, as well as biological waste such as organic food waste, e.g. meat industry waste, fish processing waste or waste edible oil. The mechanical and physical operations may include harvesting and collecting as well as crushing, cracking, cutting, shredding, grinding, chipping, milling, extruding, irradiating, extruding, pressing, filtering, sieving, adsorbing, and heat treating (e.g., drying and roasting). The chemical process may in