WO2015083109A1 - Method for devulcanization of rubber and devulcanization catalyst for such purpose - Google Patents

Method for devulcanization of rubber and devulcanization catalyst for such purpose Download PDF

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Publication number
WO2015083109A1
WO2015083109A1 PCT/IB2014/066580 IB2014066580W WO2015083109A1 WO 2015083109 A1 WO2015083109 A1 WO 2015083109A1 IB 2014066580 W IB2014066580 W IB 2014066580W WO 2015083109 A1 WO2015083109 A1 WO 2015083109A1
Authority
WO
WIPO (PCT)
Prior art keywords
rubber products
devulcanization
rubber
range
devulcanizing agent
Prior art date
Application number
PCT/IB2014/066580
Other languages
French (fr)
Inventor
Igors JEVMENOVS
Original Assignee
OZERNOVS, Olegs
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by OZERNOVS, Olegs filed Critical OZERNOVS, Olegs
Priority to EP14868161.2A priority Critical patent/EP3077452A4/en
Priority to DE14868161.2T priority patent/DE14868161T1/en
Publication of WO2015083109A1 publication Critical patent/WO2015083109A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2019/00—Use of rubber not provided for in a single one of main groups B29K2007/00 - B29K2011/00, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00—Pneumatic or solid tyres or parts thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2319/00—Characterised by the use of rubbers not provided for in groups C08J2307/00 - C08J2317/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the present invention relates to a method for devulcanization of rubber, mechanically and chemically acting on the rubber products to be processed.
  • the invention relates to a devulcanization catalyst used in said method.
  • Rubber products used in devulcanization are vehicle rubber tires.
  • Said aim of invention is reached by creating a devulcanization method for rubber products, especially rubber tires of vehicles.
  • Said method includes a feeding of rubber products in mechanical processing station for mechanical processing of rubber products. Additionally to the mechanical processing chemical processing is performed, where devulcanizing catalyst processes rubber products. Furthermore, mechanical treatment of rubber products is performed simultaneously with the feed of devulcanizing agent on said rubber products. During processing of the rubber products said products are heated up in the range of 30 to 70°C. Size of a rubber crumb in a result of mechanical processing can be in the range from 0.5 to 10 mm. Accordingly, said crumbs easily mixes with fed devulcanizing catalyst.
  • Method for devulcanization allows to perform mechanical treatment simultaneously with the chemical treatment or processing. Both processes can be performed sequentially, i.e., firstly, mechanical treatment of rubber products is performed and, secondly, a chemical treatment is performed. Feed of devulcanizing agent onto the rubber products is cyclic.
  • the rubber products are fed through the pairs of rollers arranged in the form of cascade, i.e., pairs of rollers are placed vertically one on the top of each other.
  • the gap between the pairs of different rollers is configured to provide the gaps with different sizes.
  • Force for compressing the pairs of rollers can be adjustable during the processing, thereby partly adjusting the devulcanizing process itself.
  • the gap between the rollers in the pairs is in the range of 0.25 to 5 mm. Fragmented rubber products or rubber flakes, or crumbs move between the pairs of rollers, where the pairs of rollers are placed in two vertical units. Furthermore, there are at least 2 to 4 pairs of rollers in every roller unit.
  • a conveyor for example a screw conveyour, is placed for transportation of the rubber products to be processed and already processed rubber products.
  • Rotation speed of said rollers is adjustable to ensure an optimal processing speed.
  • the rotation speed for said rollers is adjustable from 50 to 2000 Hz.
  • a novel devulcanizing catalyst is used, said catalyst comprises a compound, that contains nitrogenous substance in the range of 30 to 60 vol%, tension-providing substance in the range of 5 to 20 vol%, and concentration-providing substance in the range of 10 to 40 vol%.
  • Compound comprising nitrogen is selected from the group comprising carbamide and/or urea.
  • Tension-providing substance is selected from the group comprising zinc stearate.
  • Concentration-providing substance is selected from the group comprising steatite or talc.
  • Catalyst amount in relation to rubber product crumbs is in range of 0, 1 - 1 vol%.
  • Described object of invention comprise method of chemically mechanical devulcanization for rubber products as well as devulcanization catalyst for implementing the said method corresponding to the aims mentioned before.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

The present invention relates to a method for devulcanization of rubber, mechanically and chemically acting on the rubber products to be processed. In addition, the invention relates to a devulcanization catalyst used in said method.

Description

Method for devulcanization of rubber and devulcanization catalyst for such purpose
The present invention relates to a method for devulcanization of rubber, mechanically and chemically acting on the rubber products to be processed. In addition, the invention relates to a devulcanization catalyst used in said method. Rubber products used in devulcanization are vehicle rubber tires.
Devulcanization of rubber products and catalysts used in this process are described in several patent documents, such as USA patents No. US7166658, US6956065, US6831109, US6387965, US5891926, US5798394, US4161464, US5602186, US5284625, US4104205, US4052344, US4384151, US4544675, US5236352, US6924319, US5602186, US5264640, US6590042, US5492657, US6579950 and US7250451. USA patent No. US2891926 describes processed rubber devulcanization including processed rubber heating and exposure to a pressure of up to 3.4x106 Pascals.
While in USA patent No. US6590042 describes a processing of rubber products and specific catalyst, which raises the price of rubber product processing, therefore making process economically unfeasible. Prior art tries to solve the problems connected with intensification of rubber product devulcanization process. Various mechanical rubber product processing methods and usage of various additional chemical substances that could possibly intensify the process are presented. In addition, process intensification must be balanced with its economical feasibility. Aim of invention is to create a method of devulcanization process and a devulcanization catalyst, that would increase the speed of process preserving the necessary quality.
Said aim of invention is reached by creating a devulcanization method for rubber products, especially rubber tires of vehicles. Said method includes a feeding of rubber products in mechanical processing station for mechanical processing of rubber products. Additionally to the mechanical processing chemical processing is performed, where devulcanizing catalyst processes rubber products. Furthermore, mechanical treatment of rubber products is performed simultaneously with the feed of devulcanizing agent on said rubber products. During processing of the rubber products said products are heated up in the range of 30 to 70°C. Size of a rubber crumb in a result of mechanical processing can be in the range from 0.5 to 10 mm. Accordingly, said crumbs easily mixes with fed devulcanizing catalyst. Method for devulcanization allows to perform mechanical treatment simultaneously with the chemical treatment or processing. Both processes can be performed sequentially, i.e., firstly, mechanical treatment of rubber products is performed and, secondly, a chemical treatment is performed. Feed of devulcanizing agent onto the rubber products is cyclic.
In the mechanical processing station the rubber products are fed through the pairs of rollers arranged in the form of cascade, i.e., pairs of rollers are placed vertically one on the top of each other. The gap between the pairs of different rollers is configured to provide the gaps with different sizes. Force for compressing the pairs of rollers can be adjustable during the processing, thereby partly adjusting the devulcanizing process itself. The gap between the rollers in the pairs is in the range of 0.25 to 5 mm. Fragmented rubber products or rubber flakes, or crumbs move between the pairs of rollers, where the pairs of rollers are placed in two vertical units. Furthermore, there are at least 2 to 4 pairs of rollers in every roller unit. Between the said roller units a conveyor, for example a screw conveyour, is placed for transportation of the rubber products to be processed and already processed rubber products.
Rotation speed of said rollers is adjustable to ensure an optimal processing speed. In regard of feed of devulcanizing catalyst and number of the pairs of rollers, the rotation speed for said rollers is adjustable from 50 to 2000 Hz.
For providing the devulcanization method as described in the invention a novel devulcanizing catalyst is used, said catalyst comprises a compound, that contains nitrogenous substance in the range of 30 to 60 vol%, tension-providing substance in the range of 5 to 20 vol%, and concentration-providing substance in the range of 10 to 40 vol%.
Compound comprising nitrogen is selected from the group comprising carbamide and/or urea. Tension-providing substance is selected from the group comprising zinc stearate. Concentration-providing substance is selected from the group comprising steatite or talc. Catalyst amount in relation to rubber product crumbs is in range of 0, 1 - 1 vol%.
Described object of invention comprise method of chemically mechanical devulcanization for rubber products as well as devulcanization catalyst for implementing the said method corresponding to the aims mentioned before.

Claims

1. Method for devulcanization of rubber products, especially rubber tires, said method includes feeding of rubber products in mechanical processing station for mechanical processing of rubber products, and processing of rubber products by devulcanizing agent, wherein mechanical treatment, where mechanical processing of rubber products are performed simultaneously with the feed devulcanizing agent on said rubber products, characterized in that during the processing the rubber products are heated up in the range of 30 to 70 °C and devulcanizing agent is feed onto the rubber products in cyclic manner.
2. Method for devulcanization of rubber products according to Claim 1, characterized in that in the mechanical processing station the rubber products are fed through pair of rollers arranged in the form of cascade, where gap between the pairs of different rollers is configured to provide gaps with different sizes.
3. Method for devulcanization of rubber products according to Claim 1 or 2, characterized in that rotation speed for said rollers is adjustable from 50 to 2000 Hz.
4. A devulcanizing agent for use in method for devulcanization of rubber products according to any preceding Claim, comprising a compound, which contains nitrogenous substance in the range of 30 to 60 vol%, tension-providing substance in the range of 5 to 20 vol%, and concentration-providing substance in the range of 10 to 40 vol%.
5. The devulcanizing agent according to Claim 4, characterized in that nitrogenous substance is selected from the group comprising carbamide and/or urea.
6. The devulcanizing agent according to Claim 4, characterized in that tension-providing substance is zinc stearate.
7. The devulcanizing agent according to Claim 4, characterized in that concentration- providing substance is selected from the group comprising steatite or talc.
PCT/IB2014/066580 2013-12-06 2014-12-04 Method for devulcanization of rubber and devulcanization catalyst for such purpose WO2015083109A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14868161.2A EP3077452A4 (en) 2013-12-06 2014-12-04 Method for devulcanization of rubber and devulcanization catalyst for such purpose
DE14868161.2T DE14868161T1 (en) 2013-12-06 2014-12-04 METHOD FOR THE ELECTULKANIZATION OF RUBBER AND DEFENSE CATALYST FOR SUCH A PURPOSE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LVP-13-206A LV14868B (en) 2013-12-06 2013-12-06 Method for devulcanization of rubber and catalyst therefor
LVP-13-206 2013-12-06

Publications (1)

Publication Number Publication Date
WO2015083109A1 true WO2015083109A1 (en) 2015-06-11

Family

ID=50941947

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/066580 WO2015083109A1 (en) 2013-12-06 2014-12-04 Method for devulcanization of rubber and devulcanization catalyst for such purpose

Country Status (4)

Country Link
EP (1) EP3077452A4 (en)
DE (1) DE14868161T1 (en)
LV (1) LV14868B (en)
WO (1) WO2015083109A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109134920A (en) * 2018-07-09 2019-01-04 蚌埠恒力工贸有限公司 A kind of shaking device for devulcanization of rubber case

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU124411A1 (en) * 1959-04-28 1959-11-30 Л.М. Панкратьев Wire bending machine for making wire, e.g. bucket bows and similar articles
RU2129776C1 (en) * 1995-11-28 1999-05-10 Черников Владимир Антонович Hydroponic plant growing method
US6590042B1 (en) * 2000-10-06 2003-07-08 Ying Tang Recycled rubber processing and performance enhancement
WO2013121243A2 (en) * 2011-03-31 2013-08-22 Bodnar Valeriy Vladimirovich Method for producing recycled rubber

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9221335D0 (en) * 1992-10-06 1992-11-25 S O T A Environmental Research Cryogenic processing of used tires and the like
US5770632A (en) * 1994-06-25 1998-06-23 Sekhar; Balachandra Chakkinggal Reclaiming of elastomeric materials
IL132422A0 (en) * 1999-10-17 2001-03-19 Levgum Ltd Modifier for devulcanization of cured elastomers mainly vulcanized rubber and method for devulcanization by means of this modifier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU124411A1 (en) * 1959-04-28 1959-11-30 Л.М. Панкратьев Wire bending machine for making wire, e.g. bucket bows and similar articles
RU2129776C1 (en) * 1995-11-28 1999-05-10 Черников Владимир Антонович Hydroponic plant growing method
US6590042B1 (en) * 2000-10-06 2003-07-08 Ying Tang Recycled rubber processing and performance enhancement
WO2013121243A2 (en) * 2011-03-31 2013-08-22 Bodnar Valeriy Vladimirovich Method for producing recycled rubber

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3077452A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109134920A (en) * 2018-07-09 2019-01-04 蚌埠恒力工贸有限公司 A kind of shaking device for devulcanization of rubber case

Also Published As

Publication number Publication date
EP3077452A4 (en) 2017-08-02
LV14868A (en) 2014-06-20
DE14868161T1 (en) 2017-08-24
LV14868B (en) 2014-08-20
EP3077452A1 (en) 2016-10-12

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