http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2415124-C2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ae56aa605de693320a8e4b73eae2253c |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C39-16 |
| filingDate | 2009-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2011-03-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b3b9217db2bb01b337afd906200caa5f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c0ced687d82d7a4c45ad156942d68b7f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cc1b5b9f6903a7f0d11aa603ec8e813b |
| publicationDate | 2011-03-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2415124-C2 |
| titleOfInvention | Method of producing 2,2-methylene-bis-(4-methyl-6-tertbutylphenol) |
| abstract | FIELD: chemistry. n SUBSTANCE: invention relates to a method of producing 2,2-methylene-bis-(4-methyl-6-tertbutylphenol), which is a high-efficiency, low-volatile, non-colouring, non-toxic and non-discolouring antioxidant used for stabilising rubber, unvulcanised rubber, petroleum products, plastic, fibre and paint products. The method involves re-alkylation of a mixture of 2,6-di-tert-butyl-4-methylphenol and paracresol in the presence of an acid catalyst at high temperature, neutralisation of the obtained alkylate, extraction of 2-tertbutyl-paracresol through fractionation and condensation thereof with formaldehyde, and then washing the obtained product. Condensation is carried out in the presence of a hydrocarbon solvent and alkyl-benzene sulphonic acid as a catalyst-surfactant. Further, a second portion of hydrocarbon solvent is added. Crystallisation is carried out at low temperature. Filtration is carried out, followed by washing the obtained product, high-temperature processing of the filtrate water, separation of the organic phase of the filtrate water, regeneration of the hydrocarbon solvent therefrom and returning it into the process. n EFFECT: method enables to obtain an end product with improved quality while increasing utilisation of raw material and auxiliary materials. n 2 cl, 1 tbl, 5 ex |
| priorityDate | 2009-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.