GB415383A - Improvements in the manufacture of carbohydrate compounds - Google Patents
Improvements in the manufacture of carbohydrate compoundsInfo
- Publication number
- GB415383A GB415383A GB476233A GB476233A GB415383A GB 415383 A GB415383 A GB 415383A GB 476233 A GB476233 A GB 476233A GB 476233 A GB476233 A GB 476233A GB 415383 A GB415383 A GB 415383A
- Authority
- GB
- United Kingdom
- Prior art keywords
- atmospheres
- weight
- temperature
- pressure
- pretreated
- 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
- C08B11/00—Preparation of cellulose ethers
- C08B11/02—Alkyl or cycloalkyl ethers
- C08B11/04—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals
- C08B11/08—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals with hydroxylated hydrocarbon radicals; Esters, ethers, or acetals thereof
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)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
In the manufacture of oxyalkyl ethers of carbohydrates suitable for use as sizes, dressings and finishes for textile and other purposes, the carbohydrates are reacted with alkylene oxides under pressures of at least five atmospheres. The invention is concerned more particularly with the production of cellulose ethers containing 1--2 oxyalkyl groups per C6H10O5. The temperature may be such that the alkylene oxide is wholly liquid or it may be partially or wholly gaseous and the pressure may be due entirely to the vapour of alkylene oxide or may be partly due to the presence of other gases or vapours, e.g. nitrogen or carbon-dioxide. The reaction may be carried out in the presence of acids or acid salts, alkalies, or bases. Cellulose may be pretreated with acids or bases, strong acids when used for such a treatment being preferably removed before the oxyalkylation. The reagents used for the oxyalkylation include ethylene oxide and its homologues, glycide, epichlorhydrin or mixtures of alkylene oxides. When using the epichlorhydrin type of reagent, if the halogen atom constitutes the etherifying group alkali must be present, while if the alkylene oxide group is to react, the reaction should be under neutral or acid conditions. The oxyalkyl derivatives may be esterified, to produce substances suitable for the production of lacquers, plastics, filaments or films by the usual methods, the said products being then subjected, if desired, to any suitable after treatment processes. In an example, cotton linters containing about 10 per cent by weight of caustic soda are heated with 2--4 times their weight of ethylene oxide at a temperature of 80--100 DEG C. and a pressure of 6--8 atmospheres for 4--6 hours, or until the desired content of ether groups is obtained. In a modification, cotton linters pretreated with acetic acid are treated with 2--4 times their weight of ethylene oxide in the presence of nitrogen or other inert gas at a temperature of 40--60 DEG C. and a pressure of 12--15 atmospheres, and in a third example, cotton linters either pretreated with acetic acid or containing about 10 per cent of caustic soda are heated with 3--5 times their weight of propylene oxide in the presence of nitrogen at a temperature of 50--70 DEG C. and a pressure of 25--30 atmospheres. British Specifications 165,519, 177,868, 179,234, 198,023, 203,092, 249,173, 263,938, 277,089, 300,998, 323,790, 325,233, [all in Class 2 (ii)], 340,324, 340,325, 340,436, 340,437, 343,062, 370,430, 371,461, 380,504, 380,505, 389,823, 392,185, 397,116, 397,117, 400,589, 400,597, 403,106, 405,619, 405,676, 405,692, 406,337, 406,985, 407,018, 407,351, 407,673, 412,601; 414,751, [Group VIII], 415,382, and French Specification 565,654 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB476233A GB415383A (en) | 1933-02-16 | 1933-02-16 | Improvements in the manufacture of carbohydrate compounds |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB476233A GB415383A (en) | 1933-02-16 | 1933-02-16 | Improvements in the manufacture of carbohydrate compounds |
Publications (1)
Publication Number | Publication Date |
---|---|
GB415383A true GB415383A (en) | 1934-08-16 |
Family
ID=9783295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB476233A Expired GB415383A (en) | 1933-02-16 | 1933-02-16 | Improvements in the manufacture of carbohydrate compounds |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB415383A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0022923A1 (en) * | 1979-06-15 | 1981-01-28 | Hoechst Aktiengesellschaft | Continuous process and apparatus for preparing water-soluble hydroxyalkyl cellulose or their mixed ethers |
-
1933
- 1933-02-16 GB GB476233A patent/GB415383A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0022923A1 (en) * | 1979-06-15 | 1981-01-28 | Hoechst Aktiengesellschaft | Continuous process and apparatus for preparing water-soluble hydroxyalkyl cellulose or their mixed ethers |
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