GB493696A - Preparation of cellulose xanthate solutions - Google Patents

Preparation of cellulose xanthate solutions

Info

Publication number
GB493696A
GB493696A GB691037A GB691037A GB493696A GB 493696 A GB493696 A GB 493696A GB 691037 A GB691037 A GB 691037A GB 691037 A GB691037 A GB 691037A GB 493696 A GB493696 A GB 493696A
Authority
GB
United Kingdom
Prior art keywords
per cent
cellulose
caustic soda
solution
viscose
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
GB691037A
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.)
Brown Co
Original Assignee
Brown 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
Priority to NL62258D priority Critical patent/NL62258C/xx
Priority to US128492A priority patent/US2112576A/en
Application filed by Brown Co filed Critical Brown Co
Priority to GB691037A priority patent/GB493696A/en
Publication of GB493696A publication Critical patent/GB493696A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B9/00—Cellulose xanthate; Viscose
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
    • D01F2/08—Composition of the spinning solution or the bath

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Health & Medical Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Plant Pathology (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Biochemistry (AREA)
  • Pest Control & Pesticides (AREA)
  • Medicinal Chemistry (AREA)
  • Toxicology (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

Cellulose fibre is treated with caustic soda solution containing oxidant in sufficient amount to cause reduction of the solution viscosity of the pulp to a value below 1,0 and the treatment is continued for a sufficient period of time to yield a fibre having an alpha cellulose content of 87-93 per cent, a b -cellulose content of 6-12 per cent and a viscosity of less than 1,0. The product can be used for the manufacture of viscose by simple admixture with caustic soda solution and carbon disulphide. The amounts of caustic soda and water are preferably such as to yield a viscose containing about 6 to 10 per cent each of caustic soda and cellulose. In an example, bleached sulphite pulp is treated at a consistency of 4-10 per cent with a solution of caustic soda of upwards of 6 per cent strength containing an oxidant, e.g. 8-15 per cent of sodium hypochlorite. The treatment is carried out at 35-45 DEG C. for 2-4 hours, after which it is washed. The product may be converted directly to viscose using, for example, the one-step process described in Specification 468,993. In another example, pulp chips consisting of pulp having 90 per cent of alpha cellulose, 9 per cent of b -cellulose, 2 per cent of g -cellulose and a solution viscosity of 0,3, are wetted with 16 per cent caustic soda solution in amount to provide the chips with a cellulose-caustic soda ratio of 7 to 6. The chips are then disintegrated, e.g. in the apparatus described in Specification 474,707, [Group II], and the salve-like mass is treated with 33 per cent of carbon disulphide and 0,01 per cent of pine oil calculated on the dry cellulose. The mass is mixed and water finally added to give a viscose containing 7,4 per cent of cellulose and 6,7 per cent of caustic soda. The xanthation may be conducted in the presence of caustic soda solution of 20 per cent or greater strength, and the solution diluted to the required cellulose and caustic soda content. The Specification describes in detail a method for determining the "filterability" of viscose solutions. Specification 475,925 also is referred to.
GB691037A 1937-03-01 1937-03-09 Preparation of cellulose xanthate solutions Expired GB493696A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL62258D NL62258C (en) 1937-03-09
US128492A US2112576A (en) 1937-03-01 1937-03-01 Preparation of cellulose xanthate solutions
GB691037A GB493696A (en) 1937-03-09 1937-03-09 Preparation of cellulose xanthate solutions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB691037A GB493696A (en) 1937-03-09 1937-03-09 Preparation of cellulose xanthate solutions

Publications (1)

Publication Number Publication Date
GB493696A true GB493696A (en) 1938-10-10

Family

ID=9823053

Family Applications (1)

Application Number Title Priority Date Filing Date
GB691037A Expired GB493696A (en) 1937-03-01 1937-03-09 Preparation of cellulose xanthate solutions

Country Status (2)

Country Link
GB (1) GB493696A (en)
NL (1) NL62258C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE953341C (en) * 1948-10-02 1956-11-29 Phrix Werke Ag Process for the production of a viscose suitable for synthetic fiber production
EP3395837A4 (en) * 2015-12-25 2019-01-23 Rengo Co., Ltd. Cellulose xanthate nanofibers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE953341C (en) * 1948-10-02 1956-11-29 Phrix Werke Ag Process for the production of a viscose suitable for synthetic fiber production
EP3395837A4 (en) * 2015-12-25 2019-01-23 Rengo Co., Ltd. Cellulose xanthate nanofibers
US10662257B2 (en) 2015-12-25 2020-05-26 Rengo Co., Ltd. Cellulose xanthate nanofiber

Also Published As

Publication number Publication date
NL62258C (en)

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