http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-875058-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-29 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-235 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C59-74 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-60 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-74 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-235 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-29 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-60 |
| filingDate | 1960-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_febdfeab31289d9596b10c0a2921b468 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a26a7f93ec270b57fa514cd26b161999 |
| publicationDate | 1961-08-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-875058-A |
| titleOfInvention | Improvements in the chlorination of butine-(2)-diol-(1,4) |
| abstract | The invention comprises a process for the chlorination of butine-(2)-diol-(1,4) with at least 2 moles of chloride per mole of butinediol, which consists in treating the butinediol with chlorine at 0-150 DEG C. in aqueous solution, thereby forming an acid-reacting solution, or preferably in an aqueous solution of a mineral acid which is not oxidised by chlorine under the reaction conditions such as HCl, H2SO4, HNO3 and H3PO4. At temperatures above 60 DEG C. the main product is mucochloric acid (OHC.CCl = CCl.COOH), while at lower temperatures, e.g. up to 50 DEG C., the main product is 2,2,3,3 - tetrachlorobutane - diol - (1,4); other products obtained are 2,2,3,3-tetrachlorobutyrolactone and 2,3-dichloromaleic acid. Hydrogen peroxide, benzoyl peroxide, and/or an ammonium, alkali metal or alkaline earth metal salt, or a heavy metal compound may be present; specified heavy metal compounds are the oxides and salts of e.g. Fe, Zn, Hg, Ni, Pb and Bi, such as zinc chloride, mercury chloride, ferrous sulphate, ferric chloride, vanadium pentoxide and nickel acetylacetonate; 0.1-2% by weight of catalyst, with respect to the butinediol may be used. During the chlorination, the solution may be irradiated with light of wavelength 250-700 mm . When mineral acids are used, their initial concentration is preferably 2-4% by weight, based on total acid and water, and the mineral acid solution of butinediol is advantageously preheated before reaction with chlorine. Chlorine may be led into the aqueous or acid butinediol solution, or chlorine and butinediol, by itself or in aqueous or acid solution, are simultaneously led into water or aqueous mineral acid. Alternatively, chlorine is introduced into a preheated aqueous mineral acid solution before the addition of butinediol. The reaction product may be separated from the reaction mixture by cooling and crystallisation, and the mixed crystals separated by fractional crystallisation from aqueous solution, e.g. by way of the alkali salts, or by esterification with alkanols having 1-4 carbon atoms, with subsequent fractional distillation. Specification 803,058 is referred to.ALSO:The products obtained by chlorination of butine-(2)-diol-(1,4) with at least two mols. of chlorine (see Group IV (b)) and consisting substantially of mixtures of 2,2,3,3-tetrachlorobutanediol-(1,4) and mucochloric acid (OHC.CCl = CCl.COOH) are stated to be of value as rematocides, insecticides and fly repellents. The reaction mixture may also contain hydrogen peroxide, benzoyl peroxide, ammonium, alkali metal or alkaline earth metal salts, or heavy metal compounds. Specification 803,058 is referred to. |
| priorityDate | 1959-04-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 53.