GB656506A - Process for the extraction of cellulose from vegetable matter - Google Patents

Process for the extraction of cellulose from vegetable matter

Info

Publication number
GB656506A
GB656506A GB29662/48A GB2966248A GB656506A GB 656506 A GB656506 A GB 656506A GB 29662/48 A GB29662/48 A GB 29662/48A GB 2966248 A GB2966248 A GB 2966248A GB 656506 A GB656506 A GB 656506A
Authority
GB
United Kingdom
Prior art keywords
pulp
lye
caustic soda
washing
matter
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
GB29662/48A
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
Publication of GB656506A publication Critical patent/GB656506A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds

Abstract

<PICT:0656506/IV (a)/1> Cellulose is extracted from vegetable matter by predigesting with either a caustic soda lye at 60-100 DEG C. or a sodium carbonate lye at a temperature above 100 DEG C., washing and then further digesting under pressure with an alkaline sodium monosulphite lye. A temperature of 80 DEG C. is preferred for the predigestion when caustic soda is used. Cellulosic materials specified are straw, certain reeds such as Provence cane, and esparto. The predigestion and washing steps may be effected in a continuous process as in the Figure: raw fibre 1, caustic soda 2 and an impregnating liquid 3 recovered from a later stage of the process are mixed in digester A from which the pulp 5 is withdrawn, and washed twice at D and F. Black liquor 4, wash-water 6 and excess impregnating liquid from 3 are collected at 7 and regenerated at B by acidifying with sulphur dioxide from 8 and centrifuging. The separated organic matter is washed with acid liquor which is recirculated with the black liquor 4. The regenerated acid liquor 9 from the centrifuge B is neutralized and used for the second washing of the pulp. The final digestion of the pulp may be carried out at 150-170 DEG C. The Specification as open to inspection under Sect. 91 also refers to the treatment of stalks of maize and bagasse. This subject-matter does not appear in the Specification as accepted.
GB29662/48A 1947-11-14 1948-11-15 Process for the extraction of cellulose from vegetable matter Expired GB656506A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1117103T 1947-11-14

Publications (1)

Publication Number Publication Date
GB656506A true GB656506A (en) 1951-08-22

Family

ID=9629807

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29662/48A Expired GB656506A (en) 1947-11-14 1948-11-15 Process for the extraction of cellulose from vegetable matter

Country Status (4)

Country Link
BE (1) BE485718A (en)
FR (1) FR1117103A (en)
GB (1) GB656506A (en)
NL (1) NL72750C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1297708C (en) * 2003-08-26 2007-01-31 山东泉林纸业有限责任公司 Black liquid with washing graded cooking process production in ball and preparing method thereof
CN1318690C (en) * 2003-08-26 2007-05-30 山东泉林纸业有限责任公司 In ball washing classifying digesting technology

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1297708C (en) * 2003-08-26 2007-01-31 山东泉林纸业有限责任公司 Black liquid with washing graded cooking process production in ball and preparing method thereof
CN1318690C (en) * 2003-08-26 2007-05-30 山东泉林纸业有限责任公司 In ball washing classifying digesting technology

Also Published As

Publication number Publication date
FR1117103A (en) 1956-05-17
BE485718A (en)
NL72750C (en)

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