GB478856A - Improvements in or relating to a process of decolorizing cellulose derivative films, celluloid and like material - Google Patents

Improvements in or relating to a process of decolorizing cellulose derivative films, celluloid and like material

Info

Publication number
GB478856A
GB478856A GB53437A GB53437A GB478856A GB 478856 A GB478856 A GB 478856A GB 53437 A GB53437 A GB 53437A GB 53437 A GB53437 A GB 53437A GB 478856 A GB478856 A GB 478856A
Authority
GB
United Kingdom
Prior art keywords
cellulose
cellulose derivative
treating
celluloid
swelling
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
GB53437A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB53437A priority Critical patent/GB478856A/en
Publication of GB478856A publication Critical patent/GB478856A/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
    • C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
    • 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
    • C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
    • C08J2301/08—Cellulose derivatives
    • 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)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

Coloured film scrap, celluloid, and like gelatinized and plasticized cellulose derivative material is decolourized by treating with an aqueous solution of an organic solvent so as to produce softening and swelling of the material, removing this solution and rinsing, and then treating the material with a bleaching agent containing chlorine, such as chlorine gas, chlorine water, or a hypochlorite, in presence of water. The swelling agent may be a low molecular organic acid such as formic or acetic acid. Coloured photographic films or wrapping foils of cellulose esters or ethers such as nitrocellulose, acetyl cellulose, or benzyl cellulose may be treated. The swelling solution may be used again for treating fresh quantities of cellulose derivative material. Specification 326,471, [Class 15 (i)], is referred to.
GB53437A 1937-01-07 1937-01-07 Improvements in or relating to a process of decolorizing cellulose derivative films, celluloid and like material Expired GB478856A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB53437A GB478856A (en) 1937-01-07 1937-01-07 Improvements in or relating to a process of decolorizing cellulose derivative films, celluloid and like material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB53437A GB478856A (en) 1937-01-07 1937-01-07 Improvements in or relating to a process of decolorizing cellulose derivative films, celluloid and like material

Publications (1)

Publication Number Publication Date
GB478856A true GB478856A (en) 1938-01-26

Family

ID=9706022

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53437A Expired GB478856A (en) 1937-01-07 1937-01-07 Improvements in or relating to a process of decolorizing cellulose derivative films, celluloid and like material

Country Status (1)

Country Link
GB (1) GB478856A (en)

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