GB822974A - Process for bleaching cellulosic material with hypochlorite - Google Patents

Process for bleaching cellulosic material with hypochlorite

Info

Publication number
GB822974A
GB822974A GB12760/57A GB1276057A GB822974A GB 822974 A GB822974 A GB 822974A GB 12760/57 A GB12760/57 A GB 12760/57A GB 1276057 A GB1276057 A GB 1276057A GB 822974 A GB822974 A GB 822974A
Authority
GB
United Kingdom
Prior art keywords
hypochlorite
concentration
cellulosic material
bath
electric potential
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
GB12760/57A
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.)
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Original Assignee
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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 Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO filed Critical Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Publication of GB822974A publication Critical patent/GB822974A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06LDRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/20Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
    • D06L4/22Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents
    • D06L4/23Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents using hypohalogenites

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)

Abstract

In a process of bleaching cellulosic material with an alkaline hypochlorite solution, the concentration of active chlorine, as hypochlorite, in the bleaching bath is kept, by measurement of the electric potential of the bath, below that concentration above which the electric potential does not increase at an appreciable rate with increasing active chlorine concentration. The cellulosic material may be fibres, yarns or fabrics of cotton, linen or regenerated cellulose and may be previously treated with a hot sodium hydroxide solution. In examples the alkaline hypochlorite bath is at a temperature from 60 DEG to 80 DEG C. and initial active chlorine concentration of 0.023 to 0.05 grams per litre and successive additions of hypochlorite are made to maintain the concentration. The additions may be made automatically in response to changes in the electric potential.
GB12760/57A 1956-04-24 1957-04-18 Process for bleaching cellulosic material with hypochlorite Expired GB822974A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL822974X 1956-04-24

Publications (1)

Publication Number Publication Date
GB822974A true GB822974A (en) 1959-11-04

Family

ID=19840929

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12760/57A Expired GB822974A (en) 1956-04-24 1957-04-18 Process for bleaching cellulosic material with hypochlorite

Country Status (3)

Country Link
BE (1) BE556872A (en)
FR (1) FR1233512A (en)
GB (1) GB822974A (en)

Also Published As

Publication number Publication date
BE556872A (en)
FR1233512A (en) 1960-10-12

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