http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4113553-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_96154cb7302af742ff554ab3404edbf2 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S423-03 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C3-266 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C3-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C3-26 |
| filingDate | 1977-01-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1978-09-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a0fc05d5ea34d7321a0be36a401d858f |
| publicationDate | 1978-09-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4113553-A |
| titleOfInvention | Sodium sulfide pulping with hydrogen sulfide generation |
| abstract | A process for pulping hardwood to produce cellulose pulp in good yield and of high quality, with a low requirement for causticized pulping liquor, which comprises in a first pulping stage pulping the hardwood in an alkaline pulping liquor containing sodium sulfide at a pH of about 10.5 to about 13 and at a temperature within the range from about 110° to about 170° C while generating hydrogen sulfide in situ by reaction of sodium sulfide with organic acids liberated in the pulping; and then in a second pulping stage, following directly after the first pulping stage, continuing the pulping at a pH higher than said first stage pH, within the range of about 12.5 to about 14 and at a temperature higher than said first stage temperature within the range from about 145° to about 190° C, in the presence of added alkaline pulping liquor comprising sodium hydroxide and sodium sulfide until cellulose pulp is produced. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9741294-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5865898-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5976321-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012131665-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5326433-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4526773-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5911853-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5693296-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007240837-A1 |
| priorityDate | 1976-02-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 74.