GB598886A - Improvements in the production of cellulose esters - Google Patents
Improvements in the production of cellulose estersInfo
- Publication number
- GB598886A GB598886A GB1427240A GB1427240A GB598886A GB 598886 A GB598886 A GB 598886A GB 1427240 A GB1427240 A GB 1427240A GB 1427240 A GB1427240 A GB 1427240A GB 598886 A GB598886 A GB 598886A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- liquid
- cellulose acetate
- chlorinated
- per cent
- 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
- 229920002678 cellulose Polymers 0.000 title abstract 8
- 238000004519 manufacturing process Methods 0.000 title abstract 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 6
- 239000001913 cellulose Substances 0.000 abstract 5
- 239000007788 liquid Substances 0.000 abstract 5
- 229920002301 Cellulose acetate Polymers 0.000 abstract 4
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 3
- 125000004432 carbon atoms Chemical group C* 0.000 abstract 3
- 150000001875 compounds Chemical class 0.000 abstract 3
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Chemical compound OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 abstract 3
- 239000001117 sulphuric acid Substances 0.000 abstract 3
- 235000011149 sulphuric acid Nutrition 0.000 abstract 3
- WFDIJRYMOXRFFG-UHFFFAOYSA-N acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 abstract 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 abstract 2
- 229910052799 carbon Inorganic materials 0.000 abstract 2
- 125000001309 chloro group Chemical group Cl* 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 230000001264 neutralization Effects 0.000 abstract 2
- 150000007524 organic acids Chemical class 0.000 abstract 2
- 239000002904 solvent Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- YHRUOJUYPBUZOS-UHFFFAOYSA-N 1,3-Dichloropropane Chemical compound ClCCCCl YHRUOJUYPBUZOS-UHFFFAOYSA-N 0.000 abstract 1
- 229920000742 Cotton Polymers 0.000 abstract 1
- 229920001131 Pulp (paper) Polymers 0.000 abstract 1
- 238000006640 acetylation reaction Methods 0.000 abstract 1
- 150000007824 aliphatic compounds Chemical class 0.000 abstract 1
- 125000001931 aliphatic group Chemical group 0.000 abstract 1
- 150000008064 anhydrides Chemical class 0.000 abstract 1
- 238000009835 boiling Methods 0.000 abstract 1
- FERIUCNNQQJTOY-UHFFFAOYSA-M butyrate Chemical compound CCCC([O-])=O FERIUCNNQQJTOY-UHFFFAOYSA-M 0.000 abstract 1
- 238000004821 distillation Methods 0.000 abstract 1
- 238000005886 esterification reaction Methods 0.000 abstract 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000011888 foil Substances 0.000 abstract 1
- 235000019253 formic acid Nutrition 0.000 abstract 1
- 230000001376 precipitating Effects 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 150000005374 primary esters Chemical class 0.000 abstract 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 abstract 1
Classifications
-
- 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
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)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
Cellulose is esterified with an organic acid anhydride in a medium which is a solvent for the primary ester formed, and which comprises a neutral liquid chlorinated lower aliphatic compound containing at least two chlorine atoms each of which is attached to a carbon atom adjacent to a carbon atom having no attached chlorine atoms. The neutral organic liquid may be ethylidene chloride, or 1.3-dichloropropane. This liquid may be employed in admixture with acetic acid or other organic acid. The process may be employed in the production of cellulose esters of aliphatic acids containing up to four carbon atoms, e.g. cellulose acetate, propionate, or butyrate. Cotton linters or wood pulp may be pretreated with formic or acetic acid containing a small amount of sulphuric acid. The cellulose with the pretreatment liquid may then be placed in an acetylation medium comprising acetic p anhydride, sulphuric acid, unless sufficient is already present in the pretreatment liquor, and ethylidene chloride or another of the specified chlorinated compounds. The amount of acetic anhydride may be 250-350 per cent of the weight of cellulose, and the amount of ethylidene chloride may be above 100 and even as much as 1,000 or more per cent of the weight of cellulose. A low proportion of sulphuric acid may be used, e.g. one half to 2 per cent of the weight of cellulose. Esterification may be carried out at 20 DEG -40 DEG C. The primary cellulose acetate may be ripened in the solution after adding water or alcohol. The ripened cellulose acetate may be precipitated by incorporating with the solution a large volume of non-solvent, e.g. benzene. Precipitation may be effected or aided by removing part of the chlorinated compound by distillation. A precipitating liquid at a temperature above the boiling point of the chlorinated compound may be used, e.g. water at or near 100 DEG C. The cellulose acetate or other cellulose ester obtained by the process, may be used in the production of artificial filaments, foils, and other extruded or moulded articles.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB598886A true GB598886A (en) | 1948-03-01 |
Family
ID=1730599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1427240A Expired GB598886A (en) | 1940-09-17 | Improvements in the production of cellulose esters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB598886A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3215490A (en) * | 1959-10-02 | 1965-11-02 | Rhodiaceta | Process of acetylating a specific kind of regenerated cellulose and recovering ingredients from the used acetylating bath |
| CN109503722A (en) * | 2018-11-01 | 2019-03-22 | 中峰化学有限公司 | A method of preparing cellulose acetate filament acetyl cellulose |
-
1940
- 1940-09-17 GB GB1427240A patent/GB598886A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3215490A (en) * | 1959-10-02 | 1965-11-02 | Rhodiaceta | Process of acetylating a specific kind of regenerated cellulose and recovering ingredients from the used acetylating bath |
| CN109503722A (en) * | 2018-11-01 | 2019-03-22 | 中峰化学有限公司 | A method of preparing cellulose acetate filament acetyl cellulose |
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