http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102260161-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_37102e49d2aa544df62d84880e6f656c |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-07 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43 |
| filingDate | 2011-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_394d3ea7d0627eb1baced53cda8e44d5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9ece5e62d71d89f593240562ec85681d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_97ceb1fc701ce6afe801adcf35674eab http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d462bd0b44899ed1cd4479cddddfb0a0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_025544fff9ae61acdf61061360f4d717 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c5330c3ac0bc9c52549c7289a7e8f318 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0c4cfb5d6035350600c2a7641d21561d |
| publicationDate | 2014-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102260161-B |
| titleOfInvention | Decolorizing method of (meth)acrylic acid |
| abstract | The invention discloses a decolorizing method of (meth)acrylic acid. The decolorizing method is characterized by employing a falling film crystallization technology. The used technology comprises the following steps: a) adding 90-95wt% of acrylic acid or methacrylic acid mother liquor into a crystallizer in accordance with the capacity of the crystallizer; b) starting a freezer, and then operating the crystallizer under required temperature and pressure conditions; c) circulating the acrylic acid or methacrylic acid mother liquor at a certain rate, and cooling for crystallization; d) melting the crystallized part, and cutting the residual liquid in a certain ratio; e) adding 75wt% of polymerization inhibitor (150+/-20 ppm) when the melting of the crystallized part is soon finished; f) completely melting the crystal, cutting the residual liquid in a certain ratio, adding the remaining 25wt% of polymerization inhibitor (50+/-20 ppm), and returning the obtained product to a raw material tank; and g) repeating the above steps from a) to f) for secondary crystallization, and conveying the obtained product into a finished product tank. The decolorizing method has the advantages of high efficiency, low energy consumption, no byproduct generation, no pollution and the like. |
| priorityDate | 2011-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.