GB651405A - Process of activating chlorite solutions and bleaching cellulosic materials with these solutions - Google Patents

Process of activating chlorite solutions and bleaching cellulosic materials with these solutions

Info

Publication number
GB651405A
GB651405A GB31964/47A GB3196447A GB651405A GB 651405 A GB651405 A GB 651405A GB 31964/47 A GB31964/47 A GB 31964/47A GB 3196447 A GB3196447 A GB 3196447A GB 651405 A GB651405 A GB 651405A
Authority
GB
United Kingdom
Prior art keywords
chlorite
solution
matter
subject
organic compound
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
GB31964/47A
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.)
Solvay SA
Original Assignee
Solvay SA
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 Solvay SA filed Critical Solvay SA
Publication of GB651405A publication Critical patent/GB651405A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/20—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
    • D06L4/22—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents
    • D06L4/24—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents using chlorites or chlorine dioxide
    • D06L4/26—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents using chlorites or chlorine dioxide combined with specific additives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Paper (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

Cellulosic material is bleached by means of a chlorite solution which has been activated by adding thereto a hydrolysable chlorinated organic compound sensitive to the oxidizing action of the chlorite solution so as to form an acid capable of lowering the pH of the solution. Examples of suitable activating compounds are chloroethylenes, chloroethanes, chloromethanes, chlorhydrins and a a 1b b 1 - tetrachlorodiethyl ether. In one form of the invention, e.g. with cellulose acetate, the cellulosic material is dissolved in the hydrolysable chlorinated organic compound and is gradually precipitated as the organic compound disappears by reaction with the chlorite or by dissolution in the chlorite bath. The Specification as open to inspection under Sect. 91 includes also the subject-matter of Specification 651,450. This subject-matter does not appear in the Specification as accepted.ALSO:Cellulosic material is bleached by means of a chlorite solution which has been activated by adding thereto a hydrolysable chlorinated organic compound sensitive to the oxidizing action of the chlorite solution so as to form an acid capable of lowering the pH value of the solution. Examples of suitable activating compounds are chloroethylenes, chloroethanes, chloromethanes, chlorhydrins and a , a 1, b , b 1-tetrachlorodiethyl ether. In an example, unbleached linen is bleached in a solution of sodium chlorite at pH 10.5 to which tetrachloroethane has been added. The Specification as open to inspection under Sect. 91 includes the subject-matter of Specification 651,450 and refers also to the use of methyl alcohol and ethylene glycol as activators. This subject-matter does not appear in the Specification as accepted.ALSO:Solutions of chlorites, e.g. sodium chlorite, are activated by adding a hydrolysable chlorinated organic compound sensitive to the oxidizing action of the chlorite solution so as to form an acid capable of lowering the pH value of the solution. Examples of suitable activating compounds are chloroethylenes, chloroethanes, chloromethanes, chlorhydrins and a ,a 1,b ,b 1-tetrachlorodiethyl ether. The Specification as open to inspection under Sect. 91 includes the subject-matter of Specification 651,450 and refers also to the use of methyl alcohol and ethylene glycol as activators. This subject-matter does not appear in the Specification as accepted.
GB31964/47A 1946-12-21 1947-12-03 Process of activating chlorite solutions and bleaching cellulosic materials with these solutions Expired GB651405A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE651405X 1946-12-21

Publications (1)

Publication Number Publication Date
GB651405A true GB651405A (en) 1951-04-04

Family

ID=3876762

Family Applications (2)

Application Number Title Priority Date Filing Date
GB31964/47A Expired GB651405A (en) 1946-12-21 1947-12-03 Process of activating chlorite solutions and bleaching cellulosic materials with these solutions
GB25199/50A Expired GB651450A (en) 1946-12-21 1947-12-03 Process of activating chlorite solutions and bleaching cellulosic materials with these solutions

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB25199/50A Expired GB651450A (en) 1946-12-21 1947-12-03 Process of activating chlorite solutions and bleaching cellulosic materials with these solutions

Country Status (5)

Country Link
BE (1) BE470065A (en)
DE (1) DE904885C (en)
FR (1) FR955483A (en)
GB (2) GB651405A (en)
LU (1) LU28660A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075549B (en) * 1957-07-03 1960-02-18

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE557828A (en) * 1956-09-19

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2367771A (en) * 1941-10-08 1945-01-23 Mathieson Alkali Works Inc Bleaching cellulosic materials
BE465974A (en) * 1943-01-11 1900-01-01

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075549B (en) * 1957-07-03 1960-02-18

Also Published As

Publication number Publication date
GB651450A (en) 1951-04-04
LU28660A1 (en)
FR955483A (en) 1950-01-14
DE904885C (en) 1954-02-22
BE470065A (en)

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