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US-20260125562-A1 - PARTICULATE MATTER AND USES THEREOF

US20260125562A1US 20260125562 A1US20260125562 A1US 20260125562A1US-20260125562-A1

Abstract

The present disclosure concerns particulate matter including insoluble, non-magnetic, inorganic oxide particles, having, on each particle's surface, a plurality of, covalently grafted, ricinoleate compounds. The particulate matter is particularly suitable for odor scavenging of heterogenous materials. Further, the present disclosure provides a method of producing the particulate matter, articles of manufacture comprising the particulate matter and methods of producing the particulate matter.

Inventors

  • Gil Felus
  • Gadi Stahl
  • Jack (Tato) Bigio

Assignees

  • U.B.Q MATERIALS LTD.

Dates

Publication Date
20260507
Application Date
20230831
Priority Date
20220901

Claims (20)

  1. 1 . Particulate matter comprising insoluble, non-magnetic, inorganic oxide particles, having, on each particle's surface, a plurality of, ricinoleate compounds directly covalently grafted to the surface of said particles, wherein said particulate matter is characterized by at least one of: (a) having sizes in the nanometric and/or micrometric ranges; (b) having an ATR-FTIR peak indicative of said covalent graft of ricinoleate compounds onto said insoluble particle, at least at wavenumber within the range of 800 and 1100 cm −1 ; or (c) said insoluble particles, without said ricinoleate compounds, having a surface area of at least 50 m 2 /g, or any combination thereof.
  2. 2 .- 5 . (canceled)
  3. 6 . The particulate matter of claim 1 , wherein said insoluble particles are selected from the group consisting of silica, zeolite, titania, alumina, clay, and mixtures thereof.
  4. 7 . (canceled)
  5. 8 . The particulate matter of claim 1 , wherein said insoluble particles are not zinc oxide, magnetite and/or carbon-carbon containing particles.
  6. 9 . The particulate matter of claim 1 , wherein said plurality of ricinoleate compounds are selected from the group consisting of ricinoleic acid, ricinolein and mixtures thereof.
  7. 10 .- 12 . (canceled)
  8. 13 . A method of producing particulate matter, the method comprising i) providing a suspension comprising insoluble inorganic oxide particles and a source of ricinoleate compounds; ii) subjecting said suspension to at least a sonication process; and iii) optionally separating the particulate matter.
  9. 14 . The method of claim 13 , wherein said inorganic oxide particles are characterized by at least one of: (a) being non-magnetic particles; (b) prior to sonication, having a surface area of at least 50 m 2 /g; (c) prior to sonication, having an average size in the nanometric to micrometric range; or (d) being selected from the group consisting of silica, zeolite alumina, titania, and clay, or any combination thereof.
  10. 15 .- 18 . (canceled)
  11. 19 . The method of claim 13 , wherein said insoluble particles are not zinc oxide, magnetite and/or carbon-carbon containing particles.
  12. 20 . The method of claim 13 , wherein said source of ricinoleate compounds is selected from the group consisting of castor oil, ricinoleic acid, ricinolein and zinc ricinoleate and/or wherein said suspension is a suspension in an organic medium.
  13. 21 . (canceled)
  14. 22 . The method of claim 20 , wherein said organic medium comprises an oil.
  15. 23 . The method of claim 22 , wherein said organic medium comprises an oil selected from the group consisting of epoxidized soybean oil (ESBO), tall oil, castor oil, linseed oil, and palm oil.
  16. 24 . (canceled)
  17. 25 . The method of claim 13 , wherein said suspension comprises a radical initiator.
  18. 26 . The method of claim 25 , wherein said radical initiator is selected from the group consisting of benzoyl peroxide, di-tert-butyl peroxide, methyl ethyl ketone peroxide and ammonium persulfate.
  19. 27 . (canceled)
  20. 28 . The method of claim 13 , wherein said sonication process comprises ultrasonication, wherein said ultrasonication is characterized by at least one of: (a) ultrasonic power within a range of between about 400 W and about 25 kW; (b) ultrasonic frequency within a range of between about 15 kHz and about 200 kHz; or (c) time sufficient to cause covalent grafting of a plurality of said ricinoleic acid compounds directly onto at least the surface of said inorganic oxide particles; or any combination thereof.

Description

TECHNOLOGICAL FIELD The present disclosure relates to particulate matter and uses thereof. BACKGROUND ART References considered to be relevant as background to the presently disclosed subject matter are listed below: International patent application publication No. WO2010/082202International patent application publication No. WO12007949International patent application publication No. WO22113068Koran Patent Application Publication No. KR102355011Chinese Patent Application Publication No. CN103044776Gyergyek S, et al. Journal of colloid and interface science. 2011 Feb. 15; 354(2): pp. 498-505Kyobe J W, et al. International Nano Letters. 2016 December; 6(4): pp. 235-42Shombe G B, et al., Materials Science in Semiconductor Processing. (2015), vol. 43, 1 Mar. 2016, pp. 230-237Feng B H and Zhang Z Y. Advanced Materials Research 2011, vol. 236, pp. 1783-1788Andriayani A, et al. Advanced Materials Research, 2013, vol. 789, pp. 124-131Kirchberg S, et al. Journal of Nanomaterials. 2012 Jan. 1; 2012Zuliani A, et al. Journal of Colloid and Interface Science. 2022 May 15; 614: pp. 451-459. Acknowledgement of the above references herein is not to be inferred as meaning that these are in any way relevant to the patentability of the presently disclosed subject matter. BACKGROUND Plastics and recycled material emit odor and/or Volatile Organic Compounds (VOCs) such as solvents, residual monomers, plasticizers, processing aids, and reaction and decomposition products. Such emissions contribute to environmental pollution, affect ambient air quality, and hamper overall customer satisfaction, especially when the emission of malodorous VOCs is concerned. The VOC emission may become acute in recycled post-consumer plastics, wherein the level of contamination with malodorous VOCs is particularly high. WO2010/082202 describes a composite material having thermoplastic properties and comprising organic matter and optionally one or both of inorganic matter and plastic. Such a composite material may be prepared from waste such as domestic waste. For preparation of the composite material, waste is dried, optionally particulated. The dried and optionally particulated waste material is then heated, while mixing under shear forces. The composite material is processed to obtain useful articles. WO12007949 describes, inter alia, a composite material comprising a first component and a second component, the first component comprising an organic element and a thermoplastic element and the second component comprising at least one element selected from the group consisting of vulcanized rubber and tire cords. WO22113068 describes, inter alia, a composite material a homogenous blend of non-plastic organic matter, plastic matter and inorganic matter; wherein said composite material comprises aryl containing synthetic polymers in an amount of less than 10% percent out of the total weight of the composite material; and wherein said composite material is characterized by physical properties. KR102355011 relates to a method of electrochemically producing zinc ricinoleate particles using anodic oxidation. CN 103044776 describes a low-smell homo-polypropylene composition comprising inter alia a mineral filler (e.g., barium sulfate), antioxidants, a deodorization agent (e.g., ricinoleic acid zinc salt). Gyergyek S, et al. describe a colloidal stability of oleic and ricinoleic acid coated magnetic nanoparticles in organic solvents. Kyobe J W, et al. describe the use of castor oil and ricinoleic acid in lead chalcogenide nanocrystal synthesis. Shombe G B, et al., describe synthesis and characterization of castor oil and ricinoleic acid capped CdS nanoparticles. Feng B I and Zhang Z Y., describe a chitosan derivate prepared by grafting ricinoleic acid anhydride on carboxymethyl chitosan (CMC) molecules for use as nanopesticide carrier. Andriayani A, et al. describe synthesis of mesoporous silica from tetraethylorthosilicate by using sodium ricinoleic as a template and 3-aminopropyltrimethoxysilane. Kirchberg S, et al. describe nanocomposites based on technical polymers and sterically functionalized soft magnetic magnetite nanoparticles. Zuliani A et al., describe zinc oxide (ZnO)/Castor oil polyurethane composites for the gas phase adsorption of acetic acid. GENERAL DESCRIPTION The present disclosure is based on the finding that when ricinoleic acid compounds are directly linked to insoluble inorganic particles, the resulting particulate matter is efficient in reducing odor and/or volatiles emission from recycled waste, when the particulate matter is blended within recycled matter. Thus, in accordance with a first aspect of the presently disclosed subject matter, there is provided particulate matter comprising insoluble, non-magnetic, inorganic oxide particles, having, on each particle's surface, a plurality of, covalently grafted, ricinoleate compounds. In accordance with a second aspect of the presently disclosed subject matter there is provided a method o