GB729823A - Improvements in or relating to alkali cellulose preparation - Google Patents
Improvements in or relating to alkali cellulose preparationInfo
- Publication number
- GB729823A GB729823A GB8437/52A GB843752A GB729823A GB 729823 A GB729823 A GB 729823A GB 8437/52 A GB8437/52 A GB 8437/52A GB 843752 A GB843752 A GB 843752A GB 729823 A GB729823 A GB 729823A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- water
- alkali
- parts
- alcohols
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
- C08B1/08—Alkali cellulose
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
Comminuted cellulose having a particle size sufficiently small to pass through a 35-mesh sieve is slurried and agitated in a medium consisting of a saturated monohydric alcohol having from 2 to 5 carbon atoms in the molecule, dioxane, tetrahydrofuran or a mixture thereof, together with caustic alkali and water, the slurry containing up to 20 per cent by weight of cellulose based on the weight of the total slurry (calculated as moisture-free), and 0.2-1.8 parts of caustic alkali and 0.5-8.0 parts of water for each part of moisture-free cellulose. The cellulose may be derived from any suitable source such as cotton, cotton linters or wood pulp. Alcohols which may be used include ethyl alcohol, n- and iso-propyl alcohols, n-, secondary, iso-, and tertiary butyl alcohols, methyl propyl carbinol, diethyl carbinol, methyl isopropyl carbinol, tertiary amyl alcohol, fusel oil and pentasol (a mixture of amyl alcohols); isopropyl and tertiary butyl alcohols are preferred. The slurrying medium may be anhydrous or may contain water, e.g. ir may be an azeotropic mixture, but the water content is taken into account in calculating the water-cellulose ratio of the system. Similarly any water added with the caustic alkali is taken into account. The alkali-cellulose formed may be etherified without addition of more alkali or water to give cellulose ethers such as alkali-soluble and water-soluble carboxymethyl cellulose, hydroxyethyl cellulose, carboxyethyl cellulose, sulphoethyl cellulose, hydroxyethyl carboxymethyl cellulose, sulphoethyl hydroxyethyl cellulose, sulphoethyl carboxymethyl cellulose and cyanoethyl cellulose. In an example (all parts by weight), 30 parts of purified air-dry wood-pulp containing 5 per cent of moisture and cut to pass a standard 40-mesh sieve are added with agitation to 566.4 parts of isopropanol containing 1.5 per cent of water and 65 parts additional water. Then 31 parts of 49.7 per cent aqueous sodium hydroxide are added and agitation is continued, the temperature being kept at 18-25 DEG C. The so-formed alkali cellulose is etherified to form a carboxy methyl cellulose without further addition of alkali or water.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US729823XA | 1951-05-17 | 1951-05-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB729823A true GB729823A (en) | 1955-05-11 |
Family
ID=22110982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8437/52A Expired GB729823A (en) | 1951-05-17 | 1952-04-02 | Improvements in or relating to alkali cellulose preparation |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB729823A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4063018A (en) * | 1975-04-07 | 1977-12-13 | Daicel Ltd. | Process for preparing alkali metal salt of carboxymethyl cellulose ether |
EP2567984A1 (en) * | 2011-09-08 | 2013-03-13 | Shin-Etsu Chemical Co., Ltd. | Method for preparing nonionic water-soluble cellulose ether |
-
1952
- 1952-04-02 GB GB8437/52A patent/GB729823A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4063018A (en) * | 1975-04-07 | 1977-12-13 | Daicel Ltd. | Process for preparing alkali metal salt of carboxymethyl cellulose ether |
EP2567984A1 (en) * | 2011-09-08 | 2013-03-13 | Shin-Etsu Chemical Co., Ltd. | Method for preparing nonionic water-soluble cellulose ether |
US8864943B2 (en) | 2011-09-08 | 2014-10-21 | Shin-Etsu Chemical Co., Ltd. | Method for preparing nonionic water-soluble cellulose ether |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES344777A1 (en) | Process for making a modified carbohydrate material for smoking mixtures and the material made thereby | |
GB1139637A (en) | Process for the manufacture of low viscosity water-soluble cellulose ethers | |
GB729823A (en) | Improvements in or relating to alkali cellulose preparation | |
US2680737A (en) | Alkali cellulose preparation | |
GB513917A (en) | Improvements in and relating to the production of cellulose derivatives | |
US2912431A (en) | Preparation of carboxyalkyl cellulose derivatives | |
GB893283A (en) | Modified cellulose | |
US2687411A (en) | Production of water soluble cellulose ethers | |
US2553695A (en) | Manufacture of cellulose ethers | |
FI813291L (en) | PHOSPHONMETHYLSUBSTITUENT INNEHAOLLANDE VATTENLOESLIGA CELLULOSABLANDETRAR OCH FOERFARANDE FOER FRAMSTAELLNING AV DEM | |
GB778797A (en) | Improvements in or relating to paper manufacture | |
US3056697A (en) | Ether derivatives of tobacco and tobacco products | |
GB928792A (en) | Improvements in or relating to alkali cellulose and preparation of cellulose ethers therefrom which give smooth solutions | |
GB767923A (en) | Improvements in or relating to manufacture of water-soluble salts of carboxyalkyl cellulose ethers | |
GB791315A (en) | A method of facilitating the dissolution of high molecular-weight cellulose derivatives | |
GB956243A (en) | Improvements in or relating to stabilized cellulose derivatives and process for making films therefrom | |
GB730961A (en) | Improved process for preparing sodium carboxymethylcellulose low in salt content | |
US1841335A (en) | Process of preparing cellulose ethers | |
GB1363009A (en) | Tobacco substitute material | |
GB327157A (en) | Improvements in the manufacture of cellulose ethers | |
GB497671A (en) | Process for the manufacture of aralkylethers of high molecular carbohydrates | |
GB1110697A (en) | Improvements in or relating to a slurry process for preparing carboxymethyl cellulose | |
US2276460A (en) | Making cellulose ethers | |
GB688486A (en) | Manufacture of cellulose ethers | |
GB637134A (en) | Improvements in or relating to the manufacture of cellulose ethers |