GB342391A - A process for diminishing the viscosity of highly viscous cellulose ethers - Google Patents
A process for diminishing the viscosity of highly viscous cellulose ethersInfo
- Publication number
- GB342391A GB342391A GB34166/29A GB3416629A GB342391A GB 342391 A GB342391 A GB 342391A GB 34166/29 A GB34166/29 A GB 34166/29A GB 3416629 A GB3416629 A GB 3416629A GB 342391 A GB342391 A GB 342391A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- viscosity
- acetic acid
- cellulose ethers
- 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
-
- 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
- C08B11/20—Post-etherification treatments of chemical or physical type, e.g. mixed etherification in two steps, including purification
Abstract
The viscosity of cellulose ethers is diminished' without degradation or change of solubility, by heating with dilute aqueous mineral acid or with an aqueous solution of an acid salt, with exclusion of swelling agents or solvents, or by heating with dilute or concentrated aqueous acetic acid in the absence of a hydrolyzing, depolymerizing, or degrading agent. In examples, ethylcellulose having an ethoxyl content of 40 per cent is heated with acetic acid of 80 per cent strength, and afterwards precipitated by water, or heated with 30 per cent acetic acid, 2 per cent hydrochloric acid, or 2 per cent sodium bisulphate solution. The treatment may be effected at ordinary pressure or in an autoclave.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE342391X | 1929-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB342391A true GB342391A (en) | 1931-02-05 |
Family
ID=6239407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34166/29A Expired GB342391A (en) | 1929-04-15 | 1929-11-08 | A process for diminishing the viscosity of highly viscous cellulose ethers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB342391A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001018062A1 (en) * | 1999-09-03 | 2001-03-15 | Clariant Gmbh | Low-viscous cellulose ethers that flocculate in hot water, method for the production thereof and their use |
-
1929
- 1929-11-08 GB GB34166/29A patent/GB342391A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001018062A1 (en) * | 1999-09-03 | 2001-03-15 | Clariant Gmbh | Low-viscous cellulose ethers that flocculate in hot water, method for the production thereof and their use |
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