http://rdf.ncbi.nlm.nih.gov/pubchem/patent/SU-1454892-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9b1735782fc505b2f724c953b2e61e3e |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C3-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C3-26 |
| filingDate | 1987-06-22^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1989-01-30^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_abdbeaf03befe309b43fc8317d1b024e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d60b52057fcc930d16cc4e0e7972f11e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_70e98a6b14271dd883dc2d6a69c099f9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4e6d0cf87041481734d18c74addc9699 |
| publicationDate | 1989-01-30^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | SU-1454892-A1 |
| titleOfInvention | Method of producing pulp |
| abstract | The invention relates to the pulp and paper industry and allows increasing the yield of pulp and improving its quality by increasing the whiteness and reducing the weed, while reducing environmental pollution. The cooking of pre-steamed chips from cellulosic raw materials is carried out in two stages. At the first stage, the raw material is treated with a sulphite solution on any basis, containing 1.5-4.0% SOi, at pH 4-8 and a temperature of 120-170 ° C. After the first cooking stage, the spent solution is removed. The second stage of cooking is carried out in an aqueous solution of phosphoric acid with a concentration of 0.2-2.0% at a temperature of 140-170 ° C for 1-2.5 hours. A solution of phosphoric acid is taken in an amount equal to the amount of sulfite solution removed. after the first cooking stage. 1 hp f-ly, 3 tab. (/) |
| priorityDate | 1987-06-22^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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