GB229002A - Improvements in the manufacture of wood pulp and by-products - Google Patents

Improvements in the manufacture of wood pulp and by-products

Info

Publication number
GB229002A
GB229002A GB2886423A GB2886423A GB229002A GB 229002 A GB229002 A GB 229002A GB 2886423 A GB2886423 A GB 2886423A GB 2886423 A GB2886423 A GB 2886423A GB 229002 A GB229002 A GB 229002A
Authority
GB
United Kingdom
Prior art keywords
products
wood pulp
ammonia
manufacture
per cent
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
GB2886423A
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
Priority to NL16847D priority Critical patent/NL16847C/xx
Priority to FR24034A priority patent/FR24034E/en
Priority to FR477895A priority patent/FR477895A/en
Priority to FR22049A priority patent/FR22049E/en
Priority to DEH81741D priority patent/DE469372C/en
Priority to FR24174A priority patent/FR24174E/en
Priority to GB852/21A priority patent/GB156777A/en
Application filed by Individual filed Critical Individual
Priority to GB2886423A priority patent/GB229002A/en
Priority to DEC35576D priority patent/DE495146C/en
Priority to FR588071D priority patent/FR588071A/en
Priority to US747675A priority patent/US1547907A/en
Publication of GB229002A publication Critical patent/GB229002A/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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0007—Recovery of by-products, i.e. compounds other than those necessary for pulping, for multiple uses or not otherwise provided for
    • 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
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
    • D21C3/14—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites ammonium bisulfite
    • 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

Landscapes

  • Paper (AREA)

Abstract

An increased yield of wood pulp and an improved quantity of soluble by-products are obtained by the addition of a small quantity of ammonia or its salts to the digesting liquor used in the process described in Specification 202,016. Sulphite or carbonate of ammonia may be used. 0.1 to 0.5 per cent of ammonia may be added to a 6 to 7 per cent sulphurous acid (SO2) liquor, and in examples described temperatures of 100 DEG C. to 115 DEG C. are mentioned.
GB2886423A 1914-07-06 1923-11-15 Improvements in the manufacture of wood pulp and by-products Expired GB229002A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
NL16847D NL16847C (en) 1914-07-06
FR24034A FR24034E (en) 1914-07-06 Process for the manufacture of cellulose and for the use of waste liquors from this manufacture
FR477895A FR477895A (en) 1914-07-06 1914-07-06 Process for the manufacture of cellulose and for the use of waste liquors from this manufacture
FR22049A FR22049E (en) 1914-07-06 1919-04-17 Process for the manufacture of cellulose and for the use of waste liquors from this manufacture
DEH81741D DE469372C (en) 1914-07-06 1920-07-09 Process for obtaining pure cellulose
FR24174A FR24174E (en) 1914-07-06 1920-08-12 Process for the manufacture of cellulose and for the use of waste liquors from this manufacture
GB852/21A GB156777A (en) 1914-07-06 1921-01-07 Improvements in or relating to the treatment of crude cellulose
GB2886423A GB229002A (en) 1923-11-15 1923-11-15 Improvements in the manufacture of wood pulp and by-products
DEC35576D DE495146C (en) 1914-07-06 1924-10-23 Process for the production of cellulose by digesting wood using aqueous sulphurous acid with the addition of ammonia
FR588071D FR588071A (en) 1914-07-06 1924-10-25 Improvements in the manufacture of wood pulp and its by-products
US747675A US1547907A (en) 1914-07-06 1924-11-03 Manufacture of wood pulp and by-products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2886423A GB229002A (en) 1923-11-15 1923-11-15 Improvements in the manufacture of wood pulp and by-products

Publications (1)

Publication Number Publication Date
GB229002A true GB229002A (en) 1925-02-16

Family

ID=10282378

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2886423A Expired GB229002A (en) 1914-07-06 1923-11-15 Improvements in the manufacture of wood pulp and by-products

Country Status (1)

Country Link
GB (1) GB229002A (en)

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