| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bc46d886c07fbc63138f1c300fc6ebf2 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-265
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-04 |
| filingDate |
1992-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1994-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_36729210c1c91b54e4f7f88e8188c8a6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_53b44938fdee85f0d84e3d1f76d10a12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2215873be3c600579b3e534fee2f2f93
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a7ef2bdef1e7c4449bc1782472a0a47c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_666b1a325791188ef2954c20c86b33f9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6e59587a17378c3c272cb7d89ecce75c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_97e9a4a4900ab97c69daad85503a60a7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3796f53b8c71602776618c0f0a2f93cc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_378b4ca7bff40874948b19c4a7b7857c |
| publicationDate |
1994-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
RU-2021250-C1 |
| titleOfInvention |
Method of synthesis of p-hydroxybenzoic acid |
| abstract |
FIELD: chemical technology. SUBSTANCE: product - p-hydroxybenzoic acid, empirical formula is C 7 H 6 O 3 , m. p. is 214-215 C. Reagent 1: p-cresol. Reagent 2: acetic anhydride. Reaction conditions: in the presence of acid catalyst following by oxidation of semiproduct prepared in the mixture of acetic acid-acetic anhydride at 100-110 C in the presence of cobalt salt or alkaline metal bromide but preferably with zirconyl salt at the molar ratio of Co: alkaline metal bromide:zirconyl salt = 1:0.3-3:(0.005-0.02). EFFECT: improved method of synthesis. 1 tbl |
| priorityDate |
1992-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |