GB1399736A - Preparation of paper pulp - Google Patents
Preparation of paper pulpInfo
- 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
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.
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)
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 |
-
1972
- 1972-05-24 GB GB2444972A patent/GB1399736A/en not_active Expired
- 1972-05-26 PH PH13572A patent/PH10197A/en unknown
- 1972-05-30 OA OA54588A patent/OA04095A/en unknown
- 1972-05-31 ES ES403377A patent/ES403377A1/en not_active Expired
- 1972-05-31 DE DE19722226589 patent/DE2226589A1/en active Pending
- 1972-05-31 FR FR7219544A patent/FR2141123A5/fr not_active Expired
- 1972-06-02 AR AR242342A patent/AR194242A1/en active
Cited By (2)
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 |