http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2009133813-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7f9af914ed2fb00cd4f1b8b1a28964e4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7da583f2759c7f77c60cd65e479be40d http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_71033da1bc5c0ccf9b80ed00f1a590fb |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-25 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-06 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L33-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-05 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-07 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-25 |
| filingDate | 2009-04-24^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_763709af7c3cfa52ee46fc1dda6d7fad http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0665c47dc1fc0faf5e372e7ce286614f |
| publicationDate | 2009-11-05^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-2009133813-A1 |
| titleOfInvention | Process for producing acrylic acid, and process for producing hydrophilic resin and process for producing water absorptive resin using the process |
| abstract | Disclosed is a process for producing acrylic acid, comprising, for example, a catalytic gas-phase oxidation reaction step, a condensation step, a collection step, a distillation step, a crystallization step, and an acrylic acid recovery step. The contamination of acrylic acid with protoanemonin without providing any additional purification treatment of the resultant purified acrylic acid can be reduced. The process comprises the steps of A) obtaining an acrylic acid-containing gas by a catalytic gas-phase oxidation reaction of a gas containing a starting material for acrylic acid, B) introducing the acrylic acid-containing gas into a collection column or a condensation column where collection or condensation is carried out to obtain an acrylic acid-containing solution, and C) introducing the acrylic acid-containing solution into a distillation column or a crystallizer to perform distillation or crystallization to obtain crude acrylic acid. The process further comprises the step of heat treating the acrylic acid-containing solution or the crude acrylic acid containing not less than 100 ppm by mass of protoanemonin under conditions of 100°C or above and one hr or more and the step of introducing the heat treated acrylic acid-containing solution or the crude acrylic acid into the collection column, the condensation column, the distillation column, or the crystallizer. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105502788-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2012236782-A |
| priorityDate | 2008-04-27^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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