http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-646052-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_043c6a4e90e797f67a0e5cb252d30c56 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-48 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-02 |
| filingDate | 1948-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1950-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-646052-A |
| titleOfInvention | A process for the production of esters of allyl-type alcohols |
| abstract | Esters of carboxylic acids with allyl-type alcohols are prepared by esterifying the acid or its anhydride with the alcohol in the presence of an added ether of the said alcohol. This practice reduces the tendency for ether formation. Alcohols to be used conform to the formula <FORM:0646052/IV (b)/1> in which R is an alkyl group or a hydrogen atom and preferably have 3-5 carbon atoms in the molecule so that the corresponding ethers have from 6-10 carbon atoms in the molecule. Alcohols specified are allyl, methallyl, crotyl, angelyl and tiglyl alcohol, ethers being diallyl, dimethallyl, dicrotyl, diangelyl, ditiglyl, allyl methallyl and crotyl methallyl ethers, symmetric ethers being preferred. Any esterifiable carboxylic acid may be used particularly di- and polycarboxylic acids and acids with not more than 18 carbon atoms in the molecule. Many acids are specified including formic, n-butyric, benzoic, lauric, oleic, ricinoleic, maleic, phthalic, oxalic, hemimellitic, trimellitic, and prehnitic acids. Anhydrides of acids specified include those of acetic, succinic, benzoic and phthalic acids. A partial ester of a polycarboxylic acid, e.g. monoallyl phthalate, may also be used as the acid reactant. The reaction may be conducted in the presence of an azeotrope former, preferably the ether corresponding to the alcohol reacted. Catalysts may also be present. Generally a small excess of alcohol is employed and the azeotrope former is used in volumes of 0.1 to 0.5 volumes of alcohol. Temperatures instanced are up to 160 DEG C. In an example, 2.5 mols. of allyl alcohol are esterified with one mol. of phthalic anhydride at 140 DEG C., with sulphuric acid as catalyst and excess diallyl ether as azeotrope former and results obtained compared with those when using benzene as azeotrope diluent, more diallyl ether being obtained when benzene is used. |
| priorityDate | 1947-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.