http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1080914-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/D21C3-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C3-02 |
| filingDate | 1977-02-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1980-07-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_be3a1f3c0acb5dad599488dc4f748eb4 |
| publicationDate | 1980-07-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1080914-A |
| titleOfInvention | Pulping of hardwood with sodium sulfide and sodium hydroxide while generating hydrogen sulfide in situ in the initial pulping stages |
| abstract | PULPING OF HARDWOOD WITH SODIUM SULFIDE AND SODIUM HYDROXIDE WHILE GENERATING HYDROGEN SULFIDE IN SITU IN THE INITIAL PULPING STAGES ABSTRACT OF THE DISCLOSURE A process is provided for pulping hardwood,producing 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 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 higher temperature within the range from about 145 to about 190°C in the presence of an alkaline pulping liquor comprising sodium hydroxide and a sodium sulfide until cellulose pulp is produced. |
| 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: 58.