GB1399736A - Preparation of paper pulp - Google Patents

Preparation of paper pulp

Info

Publication number
GB1399736A
GB1399736A GB2444972A GB2444972A GB1399736A GB 1399736 A GB1399736 A GB 1399736A GB 2444972 A GB2444972 A GB 2444972A GB 2444972 A GB2444972 A GB 2444972A GB 1399736 A GB1399736 A GB 1399736A
Authority
GB
United Kingdom
Prior art keywords
alkali metal
weight percent
pulp
weight
prehydrolysis
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
GB2444972A
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.)
Process Evaluation and Development Corp
Original Assignee
Process Evaluation and Development Corp
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 Process Evaluation and Development Corp filed Critical Process Evaluation and Development Corp
Publication of GB1399736A publication Critical patent/GB1399736A/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
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds
    • 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
    • D21C3/222—Use of compounds accelerating the pulping 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/24—Continuous processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

1399736 Pulp manufacture PROCESS EVALUATION & DEVELOPMENT CORP 24 May 1972 [1 June 1971 24 Jan 1972 21 March 1972] 24449/72 Heading D2W Cellulosic pulp having improved brightness is manufactured by digesting lignocellulosic material with an aqueous alkali metal hydroxide solution of pH 8.5-11.5, said solution containing 0.9 to 1.5 weight percent of alkali/ metal carbonate and 4.5 to 7 weight percent of alkali metal bisulphite, the weight percentages being based on the dry weight of the lignocellulosic material and expressed as alkali metal oxide. The alkali metal compounds may be sodium compounds. The lignocellulsoic material may be wood, straw, bamboo, hemp, sisal or bagasse. It may be subjected to prehydrolysis by digestion at pH 4.0-5.8 170‹- 188‹C under autogenous pressure in the presence of from 70-100 weight percent moisture based on the dry wt. of the material. Acetic acid or acidic white water may be used for pH adjustment in the prehydrolysis stage. An alkali metal silicate may be added to the pulp during digestion.
GB2444972A 1971-06-01 1972-05-24 Preparation of paper pulp Expired GB1399736A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US14900071A 1971-06-01 1971-06-01
US22039072A 1972-01-24 1972-01-24
US23658972A 1972-03-21 1972-03-21

Publications (1)

Publication Number Publication Date
GB1399736A true GB1399736A (en) 1975-07-02

Family

ID=27386772

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2444972A Expired GB1399736A (en) 1971-06-01 1972-05-24 Preparation of paper pulp

Country Status (7)

Country Link
AR (1) AR194242A1 (en)
DE (1) DE2226589A1 (en)
ES (1) ES403377A1 (en)
FR (1) FR2141123A5 (en)
GB (1) GB1399736A (en)
OA (1) OA04095A (en)
PH (1) PH10197A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107130472A (en) * 2017-06-21 2017-09-05 广西师范学院 The method that dustbin is prepared by raw material of sisal hemp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107130472A (en) * 2017-06-21 2017-09-05 广西师范学院 The method that dustbin is prepared by raw material of sisal hemp
CN107130472B (en) * 2017-06-21 2018-07-20 广西师范学院 The method for preparing dustbin as raw material using sisal hemp

Also Published As

Publication number Publication date
FR2141123A5 (en) 1973-01-19
DE2226589A1 (en) 1972-12-14
PH10197A (en) 1976-09-24
ES403377A1 (en) 1975-04-16
OA04095A (en) 1979-10-30
AR194242A1 (en) 1973-06-29

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee