| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c8a115eb3fdcbd4fcc636bb14ba62f4e |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G8-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G8-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G14-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C14C3-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G8-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G8-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G8-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C14C3-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G8-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G8-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G8-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G14-06 |
| filingDate |
1989-09-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a612e27f3fc34e5b7a29956535b03ff3 |
| publicationDate |
1991-03-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
FR-2651794-A1 |
| titleOfInvention |
PROCESS FOR PREPARING SYNTHETIC TANNING AGENT AND TANNING THE LEATHER |
| abstract |
The invention relates to a process for preparing a synthetic tanning agent comprising reacting a mixture of at least 30 mol% phenol and / or sulfonated cresols and at most 70 mol% phenol and / or of cresols in a neutral or alkaline medium, with at least 60 mol% of formaldehyde, calculated as a function of the ortho and para free positions of the aromatic rings, between 60 ° C and the boiling point of the mixture for 1 to 8 hours. The process can be combined with known tanning processes and used to prepare light colored leathers. |
| priorityDate |
1989-08-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |