GB191502509A - Improved Process for the Production of an Acid Magnesium Sulphite Solution and the application of same for the Extraction of Cellulose from Fibrous Vegetable Materials. - Google Patents
Improved Process for the Production of an Acid Magnesium Sulphite Solution and the application of same for the Extraction of Cellulose from Fibrous Vegetable Materials.Info
- Publication number
- GB191502509A GB191502509A GB191502509DA GB191502509A GB 191502509 A GB191502509 A GB 191502509A GB 191502509D A GB191502509D A GB 191502509DA GB 191502509 A GB191502509 A GB 191502509A
- Authority
- GB
- United Kingdom
- Prior art keywords
- given
- acid
- cellulose
- liquor
- sulphurous 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
- D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
- D21C3/10—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites magnesium bisulfite
Landscapes
- Paper (AREA)
Abstract
2509. Jardine, J. L., and Nelson, T. A. Feb. 17. Pulp, preparation of. - A solution of acid magnesium sulphite containing a predetermined greater proportion of base than would dissolve at normal temperature (say 50-70‹ F.), and prepared by maintaining the absorption liquor at a suitable raised temperature during the absorption of sulphurous acid, is used for the extraction of cellulose from materials containing lignin and pectic substances, and it is stated that the quantity of base required varies with the quantity of pectic ingredients and the quantity of the sulphurous acid with that of the lignin. Data are given for calculating the quantity of acid that must be added to dissolve a given proportion of magnesia at a given temperature. An example is given of the treatment of bamboo arundinacea. The disintegrated culms are packed into a digester and covered with a liquor containing 2À4 per cent total sulphurous acid, 1À6 per cent being combined as normal sulphite and the rest as bisulphite. Practically no sulphurous acid escapes with the expelled air on heating, which is therefore allowed to escape freely. The digester can then be sealed, but it is better to allow a small escape of steam to assist the circulation of the liquor. The full pressure of 85-90 lb. per sq. in. above atmospheric pressure is attained in 2-3 hours, and the cooking is finished in 8-9 hours, the end being determined by analysis, as described in Specification 18,371/13.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB191502509T | 1915-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB191502509A true GB191502509A (en) | 1916-03-16 |
Family
ID=32648928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB191502509D Expired GB191502509A (en) | 1915-02-17 | 1915-02-17 | Improved Process for the Production of an Acid Magnesium Sulphite Solution and the application of same for the Extraction of Cellulose from Fibrous Vegetable Materials. |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR480933A (en) |
| GB (1) | GB191502509A (en) |
| NL (1) | NL2563C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2778729A (en) * | 1954-08-16 | 1957-01-22 | Chemical Construction Corp | Recovery of nickel and cobalt values from garnierite ores |
-
0
- NL NL2563D patent/NL2563C/xx active
-
1915
- 1915-02-17 GB GB191502509D patent/GB191502509A/en not_active Expired
-
1916
- 1916-02-11 FR FR480933A patent/FR480933A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2778729A (en) * | 1954-08-16 | 1957-01-22 | Chemical Construction Corp | Recovery of nickel and cobalt values from garnierite ores |
Also Published As
| Publication number | Publication date |
|---|---|
| NL2563C (en) | |
| FR480933A (en) | 1916-10-10 |
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