http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103007773-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ddac65606de3b966e6f33acf1f1407c8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d7344f7b426556ad3a04cc689dc3b686 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D69-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-26 |
| filingDate | 2011-09-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_15d0d781d626e167f59ec886a4a4d9ed http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_526840e8538ca3feeac21615c1a47324 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b96d12db55145ebbbcb730094a30538a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_17d355502be44ba48123e745c5a89924 |
| publicationDate | 2015-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103007773-B |
| titleOfInvention | Improved preparation method of polypropylene flat-plate separation membrane |
| abstract | The invention relates to an improved preparation method of a polypropylene flat-plate separation membrane. The invention belongs to the field of high-molecular material science. The method comprises the steps that: (1) polypropylene and a diluent are added into a kettle with a stirring device; heating and stirring are carried out, such that a membrane casting liquid is obtained; and when stirring is stopped, the liquid is subjected to standing and defoaming for 0.5-2h; (2) the membrane casting liquid is filtered by using a filter, and is introduced into a die head, wherein a die head temperature is 140-175 DEG C; the membrane casting liquid is extruded by a nozzle; the membrane casting liquid first passes through air atmosphere, and then enters a one-stage or multi-stage coagulating bath; the membrane casting liquid is cooled by the one-stage or multi-stage coagulating bath, and the polypropylene flat-plate separation membrane is obtained by curing; (3) the polypropylene flat-plate separation membrane is wound by using a winding machine, and is extracted in one or a plurality of extraction agents; and (4) the extracted membrane is fetched and dried; and extraction agent is removed, such that the polypropylene flat-plate separation membrane is obtained. With the method provided by the invention, under a same condition, a membrane flux is improved from 15L/m<2>.h of one-stage water coagulating bath to higher than 1200 L/m<2>.h of two-stage coagulating bath. |
| priorityDate | 2011-09-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 39.