GB424921A - An improved method of chlorination of wood pulp and like materials - Google Patents
An improved method of chlorination of wood pulp and like materialsInfo
- Publication number
- GB424921A GB424921A GB9008/34A GB900834A GB424921A GB 424921 A GB424921 A GB 424921A GB 9008/34 A GB9008/34 A GB 9008/34A GB 900834 A GB900834 A GB 900834A GB 424921 A GB424921 A GB 424921A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chlorine
- water
- pipes
- pulp
- wood pulp
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes
Abstract
<PICT:0424921/IV/1> Wood pulp &c. is chlorinated by dispersing gaseous, elementary chlorine under pressure in a liquid, e.g. water, in which it is relatively unreactive, in excess of the solubility of the chlorine in the water &c., bringing such chlorine water &c. into contact with the pulp &c. under less pressure, the chlorine being delivered into the pulp in a very finely dispersed condition, and being chemically absorbed thereby. The chlorine under pressure passes through a valve 8 and pipes 6, 9<a>, 9<b> to ejectors 5 supplied with water through pipes 10, 11, the pressures being indicated by gauges 7 and 12 respectively, the mixture flowing through pipes 14 and perforated pipes or ejectors 4 to a conventional bellmer engine. In an example, 5 tons of air-dried hemlock pulp is circulated once round the bellmer engine each 3\ba1/2\be--8 minutes and treated with 10 lbs. of chlorine per minute for 22--25 minutes at 35--90 DEG F.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US664034A US1971241A (en) | 1933-04-01 | 1933-04-01 | Method of chlorination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB424921A true GB424921A (en) | 1935-03-04 |
Family
ID=24664239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9008/34A Expired GB424921A (en) | 1933-04-01 | 1934-03-22 | An improved method of chlorination of wood pulp and like materials |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE402322A (en) |
| GB (1) | GB424921A (en) |
-
0
- BE BE402322D patent/BE402322A/xx unknown
-
1934
- 1934-03-22 GB GB9008/34A patent/GB424921A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE402322A (en) |
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