http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102719573-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_53b4d53983adbf56dd0e7d0bf96f8ce5 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C14C9-00 |
| filingDate | 2012-06-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-04-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b76341f31a7a589bd1521ad634bb2135 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_100d1c543e236d7a95b9c2aaac4b4650 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_65547f99fe1efa9abb62fec595049f9a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_aa49f25dcd8648f2b8b7bcf4d8370d8a |
| publicationDate | 2014-04-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102719573-B |
| titleOfInvention | Method for reducing content of hexavalent chromium in leather through synergistic effect of tannin and vitamin C |
| abstract | The invention discloses a method for reducing the content of hexavalent chromium in leather through the synergistic effect of tannin and vitamin C. The method is characterized by comprising the following steps of: soaking 5 to 10 parts of blue leather powder by using distilled water, preparing 1 to 10 parts of vitamin C into a solution, adding the soaked blue leather powder into the solution, reacting at the temperature of 10 to 40 DEG C for 12 to 24h, standing for 6 to 12h, and filtering; adding filter residue into 300 to 500 parts of distilled water, adding 0.5 to 2 parts of tannin, reacting at room temperature for 12 to 24h, standing for 6 to 12h, and filtering; adding 50 to 100 parts of glutaraldehyde or oxazolidine water solution at the concentration of 3 percent, reacting at the temperature of 40 to 60 DEG C for 4 to 8h, standing for 8 to 12h, and filtering; and drying for 6 to 12h under the condition that the temperature is 30 to 50 DEG C and the vacuum degree is 0.1Mpa, adding an obtained product into 40 to 100 parts of oleic acid water solution in which the ratio of oleic acid to water is 1:200, regulating the pH value to be 4.0 to 6.0 by using acid, putting into a constant-temperature water bath oscillator, reacting for 4 days under the condition that the temperature is 30 to 50 DEG C and the rotating speed is 50 to 100rpm, and testing the content of the hexavalent chromium in the blue leather powder. |
| priorityDate | 2012-06-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 39.