GB718188A - Improvements in wood pulp and method of producing same - Google Patents
Improvements in wood pulp and method of producing sameInfo
- Publication number
- GB718188A GB718188A GB20754/51A GB2075451A GB718188A GB 718188 A GB718188 A GB 718188A GB 20754/51 A GB20754/51 A GB 20754/51A GB 2075451 A GB2075451 A GB 2075451A GB 718188 A GB718188 A GB 718188A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wood pulp
- fatty alcohols
- ether
- ethenoxy
- processes
- 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
- D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
- D21C9/185—De-watering; Elimination of cooking or pulp-treating liquors from the pulp comprising at least one step where the pulp is suspended in a gaseous medium, e.g. flash drying
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B3/00—Preparation of cellulose esters of organic acids
- C08B3/06—Cellulose acetate, e.g. mono-acetate, di-acetate or tri-acetate
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
A mixed ether which contains a polyethylene oxide radical and an aliphatic hydrocarbon radical containing more than seven carbon atoms, and which is preferably water-soluble but at least slightly water-soluble, is added to wood pulp, prior to the completion of drying, in a proportion of 0.015 to 0.5 per cent. by weight based on the bone dry weight of the pulp. The addition prevents inactivation in non-aqueous conversion processes, e.g. the production of cellulose acetate, and in aqueous conversion processes, e.g. the viscose process. The preferred mixed ethers contain 8 to 50 ethenoxy groups and a normal primary aliphatic hydrocarbon radical of 8-20 carbon atoms. They may be prepared by conventional processes from fatty alcohols and ethylene oxide using sodium as a catalyst. The fatty alcohols may be synthetic or may be prepared by catalytic hydrogenation of vegetable or animal oils. Pure or technical fatty alcohols may be used. It is preferred to incorporate the mixed ethers in the refined wood pulp on the sheet-forming machine prior to drying by means of sprays or rotating rolls, so that the mixed ethers are incorporated on one or both surfaces of the sheet. Tests are reported giving the effect of the addition of compounds such as the dodeca-ethenoxy ether of lauryl alcohol and the nonadeca-ethenoxy ether of oleyl alcohol to wood pulp intended for use in acetylation and xanthation processes. Specifications 601,783 and 685,843 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US718188XA | 1950-09-09 | 1950-09-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB718188A true GB718188A (en) | 1954-11-10 |
Family
ID=22103791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20754/51A Expired GB718188A (en) | 1950-09-09 | 1951-09-03 | Improvements in wood pulp and method of producing same |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB718188A (en) |
-
1951
- 1951-09-03 GB GB20754/51A patent/GB718188A/en not_active Expired
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