| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_79cbb9f87b30f4e71aae70684a99180e |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C9-147
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C9-1057
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C9-153 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06L3-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C9-147
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C9-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C9-153
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06L4-70
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C9-16 |
| filingDate |
1991-02-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_93af2fafb5e5aaa20ef9aff30b54e968
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_37c5b204e153ff4bfc5a0720f3f3e5fc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_27c0b95d685ab59a5afbaf526fd740a1 |
| publicationDate |
1991-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2035698-A1 |
| titleOfInvention |
Chlorine-free bleaching method for dissolving-grade pulps |
| abstract |
A three-stage bleaching process for dissolving grade pulp utilizes the sequence EOP-Z-P and the off gas from the Z stage is delivered to the EOP stage whose parameters are controlled to fully react all of the oxygen of the off gas. The filtrate or waste water from the Z stage, at a pH below 3, serves to dilute the EOP pulp before Z stage bleaching and/or for de-ashing of the P pulp follow-ing the P stage. |
| priorityDate |
1990-02-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |