GB1059282A - Production of cellulosic fibre pulp - Google Patents
Production of cellulosic fibre pulpInfo
- Publication number
- GB1059282A GB1059282A GB464164A GB464164A GB1059282A GB 1059282 A GB1059282 A GB 1059282A GB 464164 A GB464164 A GB 464164A GB 464164 A GB464164 A GB 464164A GB 1059282 A GB1059282 A GB 1059282A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- spent
- bamboo
- liquor
- acid
- 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
- D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
- D21C3/16—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides nitrogen oxides; nitric acid nitrates, nitrites
Landscapes
- Paper (AREA)
Abstract
A cyclic process for the production of cellulose pulp from bamboo and for the fertilization of the bamboo comprises the steps of pulping bamboo with an aqueous solution of nitric acid, separating the insoluble material, containing cellulose pulp, from the spent liquor, neutralizing at least a part of the liquor and applying the neutralized liquor to growing bamboo plants. Bamboo from the plantation may be chipped and then digested with dilute nitric acid. The digested pulp is separated from the spent acid and washed first with water, then with aqueous ammonia or potassium hydroxide, and finally with water, and shives are removed. It is then bleached in a multistage process with chlorine, aqueous caustic soda and calcium "hypochlorite" obtained by treating lime with chlorine in water. The bleached pulp is washed with water, dewatered by pressing, dried and baled. Gases from the digester are washed with water for recovery of nitric acid. This water, the spent acid from the digester and part of the wash water from the first wash of the pulp after digestion are mixed and fortified with concentrated nitric acid for re-use. The rest of the water from the first wash is used to neutralize the spent liquor from the alkali treatment and subsequent water wash, and the resulting liquor is returned to the plantation for use as fertilizer. In modifications: the spent acid may be neutralized with potassium carbonate, lime, hydrated lime, magnesia or dolomite; bleaching may be carried out with hydrogen peroxide or chlorine dioxide; the effluent from the bleaching step may neutralized, treated to remove toxic substances, and go to the plantation; and a predigestion with aqueous potassium hydroxide may precede the acid treatment, and the spent liquors from this digestion may then be neutralized with spent acid and returned to the plantation. The pulps obtained can be used to make paper or cellulosic chemicals.ALSO:A cyclic process for the production of cellulose pulp from bamboo and for the fertilization of the bamboo comprises the steps of pulping bamboo with an aqueous solution of nitric acid, separating the insoluble material, containing cellulose pulp, from the spent liquor, neutralizing at least a part of the liquor and applying the neutralized liquor to growing bamboo plants. Bamboo from the plantation may be chipped and then digested with dilute nitric acid. The digested pulp is separated from the spent acid and washed first with water, then with aqueous ammonia or potassium hydroxide, and finally with water, and shives are removed. It is then bleached in a multistage process with chlorine, aqueous caustic soda and calcium "hypochlorite" obtained by treating lime with chlorine in water. The bleached pulp is washed with water, dewatered by pressing, dried and baled. Gases from the digester are washed with water for recovery of nitric acid. This water, the spent acid from the digester and part of the wash water from the first wash of the pulp after digestion are mixed and fortified with concentrated nitric acid for re-use. The rest of the water from the first wash is used to neutralize the spent liquor from the alkali treatment and subsequent water wash, and the resulting liquor is returned to the plantation for use as fertilizer. In modifications the spent acid may be neutralized with potassium carbonate, lime, hydrated lime, magnesia or dolomite; bleaching may be carried out with hydrogen peroxide or chlorine dioxide; the effluent from the bleaching step may be neutralized, treated to remove toxic substances, and go to the plantation; and a predigestion with aqueous potassium hydroxide may precede the acid treatment, and the spent liquors from this predigestion may then be neutralized with spent acid and returned to the plantation. The pulps obtained can be used to make paper or cellulosic chemicals.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US25586763A | 1963-02-04 | 1963-02-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1059282A true GB1059282A (en) | 1967-02-15 |
Family
ID=22970190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB464164A Expired GB1059282A (en) | 1963-02-04 | 1964-02-04 | Production of cellulosic fibre pulp |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1059282A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2118223A (en) * | 1982-03-23 | 1983-10-26 | Mahindra Kumar Makhija | Pulp manufacture |
CN101158123B (en) * | 2007-11-15 | 2011-07-20 | 宜宾纸业股份有限公司 | High-strength bamboo pulp manufacturing technique |
CN104138031A (en) * | 2014-07-24 | 2014-11-12 | 四川省西龙生物质材料科技有限公司 | Preparation method of self-colored bamboo fiber filter tip |
CN104138031B (en) * | 2014-07-24 | 2016-11-30 | 四川环龙新材料有限公司 | A kind of true qualities method for preparing bamboo fiber filter tip |
-
1964
- 1964-02-04 GB GB464164A patent/GB1059282A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2118223A (en) * | 1982-03-23 | 1983-10-26 | Mahindra Kumar Makhija | Pulp manufacture |
CN101158123B (en) * | 2007-11-15 | 2011-07-20 | 宜宾纸业股份有限公司 | High-strength bamboo pulp manufacturing technique |
CN104138031A (en) * | 2014-07-24 | 2014-11-12 | 四川省西龙生物质材料科技有限公司 | Preparation method of self-colored bamboo fiber filter tip |
CN104138031B (en) * | 2014-07-24 | 2016-11-30 | 四川环龙新材料有限公司 | A kind of true qualities method for preparing bamboo fiber filter tip |
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