http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2747664-C2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2cce5ef4411989ee1c82676b4c27ffc2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C9-1042 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C9-1057 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C9-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C9-163 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C9-1005 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C9-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C9-14 |
| filingDate | 2018-01-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ad118a8ed4230a9aec0e56ebeb2d1732 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8612584c00c85f4331a25ffd08949185 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a2e47ca2d2990cb7456a9a1c5095803a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a432836305468e6ee1753d1262b88daf http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0665d0392548343251698f47140dd9ff |
| publicationDate | 2021-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2747664-C2 |
| titleOfInvention | Paper pulp bleaching method |
| abstract | FIELD: paper-making. n SUBSTANCE: present invention relates to a method of bleaching unbleached or pre-bleached paper pulp, which includes at least the following sequential stages: a) obtaining unbleached or pre-bleached paper pulp with a pH value of at least 8, b) bringing the paper pulp obtained at the end of the stage a) into a contact with chlorine dioxide, c) adding at least one Bronsted base into the paper pulp if pH of the paper pulp obtained at the stage b) is less than 10, d) adding hydrogen peroxide into the paper pulp obtained at the end of the stage c), e) keeping the paper pulp obtained at the end of the stage d) in the first bleaching tower, f) not necessarily adding sulfuric acid into the paper pulp obtained at the end of the stage e) and keeping the obtained paper pulp in the second bleaching tower. The method does not require the stage of flushing the paper pulp before the end of the stage e) and, if applicable, before the end of the stage f). n EFFECT: obtaining a paper pulp bleaching method. n 13 cl, 5 tbl, 2 ex, 6 dwg |
| priorityDate | 2017-01-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.