GB297817A - Improvements in or relating to process of disintegration and devulcanization of rubber scrap - Google Patents

Improvements in or relating to process of disintegration and devulcanization of rubber scrap

Info

Publication number
GB297817A
GB297817A GB2370628A GB2370628A GB297817A GB 297817 A GB297817 A GB 297817A GB 2370628 A GB2370628 A GB 2370628A GB 2370628 A GB2370628 A GB 2370628A GB 297817 A GB297817 A GB 297817A
Authority
GB
United Kingdom
Prior art keywords
pressure
scrap
rubber
lbs
steam
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB2370628A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Firestone Inc
Original Assignee
Firestone Tire and Rubber Co
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 Firestone Tire and Rubber Co filed Critical Firestone Tire and Rubber Co
Publication of GB297817A publication Critical patent/GB297817A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C08J11/14—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 by treatment with steam or water
    • 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
    • C08J2321/00—Characterised by the use of unspecified rubbers
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

297,817. Firestone Tyre & Rubber Co. (1922), Ltd., (Assignees of Gross, R. R.). Sept. 29, 1927, [Convention date]. Devulcanizing rubber.-Rubber scrap, particularly that containing textile insertions, is subjected to contact with high pressure steam at pressures of 600-1000 lbs. per sq. in for a, period of 1-15 min., whereupon the pressure is suddenly released, for example by discharging the contents from the pressure vessel. The scrap is disintegrated thereby, the textile material is charred or hydrolyzed, and the free sulphur is converted into combined sulphur. The scrap may be pretreated with softeners, swelling or devulcanizing agents, and may be warmed by treatment with steam at 175 lbs. pressure for a short time The Specification as open to inspection under Sect. 91 (3) (a) places the lower limit of steam pressure at 400 lbs. per sq. in. This subjectmatter does not appear in the Specification as accepted.
GB2370628A 1927-09-29 1928-08-17 Improvements in or relating to process of disintegration and devulcanization of rubber scrap Expired GB297817A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US297817XA 1927-09-29 1927-09-29

Publications (1)

Publication Number Publication Date
GB297817A true GB297817A (en) 1929-09-19

Family

ID=21850851

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2370628A Expired GB297817A (en) 1927-09-29 1928-08-17 Improvements in or relating to process of disintegration and devulcanization of rubber scrap

Country Status (1)

Country Link
GB (1) GB297817A (en)

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