http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2534558-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-16 |
| filingDate | 1975-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ff59a439ba15110f8e7548680d6bd867 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cca7ea08179e69e8f07f8df382af0050 |
| publicationDate | 1977-02-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-2534558-A1 |
| titleOfInvention | PROCESS FOR THE PRODUCTION OF ALPHA, ALPHA'-BIS- (4-HYDROXYPHENYL) - DIISOPROPYLBENZENE |
| abstract | The prepn. of opt. substd. 4-hydroxy-phenyl-isopropylbenzenes comprises reacting opt. alpha-OH- or alpha-alkoxy-substd. isopropylbenzenes having formula (I) (where n is no. 1-3; R1 areopt. different when n = 2 or 3 and denote H, OH or 1-6C alkyl) with opt. substd. phenols. Acid catalysts are used and consists of light-coloured sulphonated polystyrene crosslinked with max. 10(2-4) wt. % divinylbenzene. Process is partic. suitable for condensing alpha,alpha'-dihydroxy-diisopropylbenzenes and their derivs. with phenols to give alpha,alpha'-bis-(4-hydroxyphenyl)-diisopropylbenzenes (II). (II) are starting materials for prodn. of polycarbonates, polyesters and polysulphones. Catalysts cause no corrosion and are easily sepd. High space-time yields are achieved. Yields reach 98% of theoretical. Prods. are highly pure. In an example, 300g/hr alpha,alpha'-dihydroxy-1,4-diisopropylbenzene and 3600 g/hr. phenol were pumped through catalyst bed of 400g ion exchanger having degree of crosslinking 2% and Lovibond colour values 0.5, 0 and 2.1 in red, blue and yellow ranges. alpha,alpha'-Bis-(4-hydroxyphenyl) p-diisopropylbenzene was obtd. in 94% yield. M. pt. 196-197 degrees C (from toluene). |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7608742-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1942111-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8134034-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7868211-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3919148-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8288593-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8003829-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10294182-B2 |
| priorityDate | 1975-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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