http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2904315-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-515 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-673 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-84 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-51 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-67 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-84 |
| filingDate | 1979-02-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0d1670d25d181a0cd75b0309bee20002 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cfc105cb1ed509fb9fecb5fa87fe7456 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dbfae423e035780696b35a9eff0cffae |
| publicationDate | 1980-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-2904315-A1 |
| titleOfInvention | METHOD FOR PRODUCING P-HYDROXYBENZALDEHYDE |
| abstract | In a new process for the prodn. of p-hydroxybenzaldehyde, p-benzyloxy-benzaldehyde derivs. of formula PhCH2OAr are treated with an aq. hydrohalic acid at 70-130 degrees C: Ar is p-formyl-phenyl or its acetal with 1-3C alkyl gps. Reaction temp. is pref. 90-120 degrees C. Suitable hydrohalic acids are HCl and HBr with a concn. of e.g. 5-30 wt.% (the concn. pref. being less than that of the constant boiling mixt. with water). The aq. hydrohalic acid is generally used in an amt. of 3-20 times the wt. of benzoaldehyde deriv. Reaction time is generally 3-20 hrs. Benzyl halide formed as byproduct is advantageously removed from the reaction mixt. by azeotropic distn. with the aq. hydrohalic acid. The single-step process gives prod. of excellent quality in good yields. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4967013-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0059372-A1 |
| priorityDate | 1979-02-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.