GB260620A - Process and apparatus for regenerating vulcanised rubber - Google Patents

Process and apparatus for regenerating vulcanised rubber

Info

Publication number
GB260620A
GB260620A GB2715626A GB2715626A GB260620A GB 260620 A GB260620 A GB 260620A GB 2715626 A GB2715626 A GB 2715626A GB 2715626 A GB2715626 A GB 2715626A GB 260620 A GB260620 A GB 260620A
Authority
GB
United Kingdom
Prior art keywords
rubber
lbs
sulphur
heated
drum
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
GB2715626A
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.)
Pirelli and C SpA
Original Assignee
Pirelli SpA
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 Pirelli SpA filed Critical Pirelli SpA
Publication of GB260620A publication Critical patent/GB260620A/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
    • C08J11/16—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 inorganic material
    • 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)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

260,620. Soc. Italiana Pirelli, (Assignees of Mrach, A.). Oct. 31, 1925, [Convention date]. Drawings to Specification. Devulcanizing and using waste rubber.- Vulcanized rubber is regenerated by adding to it a solution of caustic alkalis or potassium and sodium carbonates of moderate concentration (35‹-36‹ BÚ) in quantities slightly in excess of that chemically corresponding to the total sulphur in the rubber, and raising the temperature to that required, under atmospheric pressure, while agitating the mass. In an example, 220 lbs. of rubber scrap is ground and placed in a rotatable drum capable of being heated and cooled externally, with 66 lbs. of caustic soda at 35‹ BÚ. The drum is rotated and heated rapidly to 135‹ C. and then slowly to 210‹ C., the whole process taking seven hours. Fabric may be destroyed by a preliminary acid treatment. The Specification as open to inspection under Sect. 91 (3) (a) states that other salts capable of combining with sulphur may be used. This subject-matter does not appear in the Specification as accepted.
GB2715626A 1925-10-31 1926-10-29 Process and apparatus for regenerating vulcanised rubber Expired GB260620A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT260620X 1925-10-31

Publications (1)

Publication Number Publication Date
GB260620A true GB260620A (en) 1927-07-28

Family

ID=11218537

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2715626A Expired GB260620A (en) 1925-10-31 1926-10-29 Process and apparatus for regenerating vulcanised rubber

Country Status (3)

Country Link
DE (1) DE503648C (en)
FR (1) FR623190A (en)
GB (1) GB260620A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008025521A1 (en) * 2006-08-30 2008-03-06 Pac Holding S.A. Process and apparatus for utilizing oxygen-containing polymers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008025521A1 (en) * 2006-08-30 2008-03-06 Pac Holding S.A. Process and apparatus for utilizing oxygen-containing polymers

Also Published As

Publication number Publication date
DE503648C (en) 1930-07-24
FR623190A (en) 1927-06-17

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