| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5539e85987921f605c2435d0251b02b6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_71c20e7fd6d09873707101f5a9741532 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21B1-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C9-1084 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C9-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21B1-16 |
| filingDate |
1989-03-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2001-04-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_80a715d124b18781cce6db70438028ad
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d1ed3ad3caadbdd81a339cd4e4ca57f7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8feb9b4dc416523423658a7fd230beac
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5ae18a90edf4edc563c38edc5cb5df37 |
| publicationDate |
2001-04-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0333398-B2 |
| titleOfInvention |
Process for bleaching mechanical wood pulp |
| abstract |
A paper pulp refining and bleaching process wherein the pulp is treated in a refiner (10,12) with a sodium hydrosulfite bleach liquor in the presence of a strong alkali such as NaOH, whereby bleaching takes place at alkaline pH, preferably 10 to 12. The process is preferably carried out by passing the pulp successively through a primary refiner (10) at elevated pressure, a secondary refiner (12) at atmospheric pressure and a bleaching tower (14), an alkaline hydrosulfite solution being fed to each. |
| priorityDate |
1988-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |