http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-489259-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6108c9a7f7a472c2db8923daca0ec8d6 |
| filingDate | 1937-11-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1938-07-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-489259-A |
| titleOfInvention | Improvements in or relating to the concentration of aliphatic acids |
| abstract | In the concentration of aliphatic acids such as acetic acid by extracting with ethyl acetate or with mixtures containing ethyl acetate as main constituent, the extraction is effected in the presence of a small quantity only of a salt which acts as a buffer to prevent hydrolysis of the ester. Suitable salts are sodium and potassium acetates and sulphates. The extraction may be effected in the apparatus described in Specification 455,325 or in a column provided with baffle plates and spray nozzles, or by a batch method in a series of tanks. Part or all of the inner surfaces of the extraction apparatus may be made of or coated with a urea-formaldehyde resin. An example describes the extraction of aqueous acetic acid with ethyl acetate and benzene in the presence of about 1 per cent of concentrated solution of sodium sulphate, but other acids such as formic, propionic, and butyric acid or acids produced in the fermentation of the juice of apples, grapes and the like may also be treated. The Specification as open to inspection under Sect. 91 includes the use of an extractant comprising an ester of an aliphatic acid in the presence of a substance which inhibits the hydrolysis of the ester. The inhibitor may be made by adding to the acid a carbonate or bicarbonate or like salt, for instance an alkali carbonate or bicarbonate may be added to neutralize mineral acid such as sulphuric acid which may be present. This subject-matter does not appear in the Specification as accepted. |
| priorityDate | 1936-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.