| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5ce7bde1bc2d14324c60b4b689690280 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S159-13
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S210-928 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C11-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C11-106 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C11-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C11-02 |
| filingDate |
1989-02-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1990-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7caeb02c248ce3254b9570de02969224
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_094dbcde65942865ef176a8c3c4fdb3a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7fbe685bff5da5332f05a73a19bb9916 |
| publicationDate |
1990-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4941946-A |
| titleOfInvention |
Process for decreasing the tendency to form deposits in plants for evaporating spent sulfite liquors |
| abstract |
A process for decreasing the tendency to form deposits in plants for evaporating spent sulfite liquors used to produce woodpulp. In the process, the liquors are treated with polyacrylic acids having a low molecular weight. In order to prevent virtually any deposition and to increase the evaporation rate, an aqueous solution of polyacrylic acid having a low molecular weight is added to the spent sulfite liquor in an entrance stage of the multiple-effect sulfite liquor in an entrance stage of the multiple-effect evaporating system and an aqueous solution of a copolymer of sulfonated styrene and maleic anhydride or an aqueous solution of a polyacrylic acid having a low molecular weight is added to the spent sulfite liquor in at least one succeeding stage of the multiple-effect evaporating system. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101535565-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6310031-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008277083-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108404438-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7985318-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5320757-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008057031-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8303768-B2 |
| priorityDate |
1988-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |