| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7f9af914ed2fb00cd4f1b8b1a28964e4 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-252
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-21 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-05
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-21
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-25 |
| filingDate |
2002-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_00d207d06c66bc24165fdc168e9e0423
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1b11f8476a271f4792f72e06b4c5d11c |
| publicationDate |
2004-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-2004067616-A |
| titleOfInvention |
Method for producing acrylic acid |
| abstract |
An object of the present invention is to provide a method for producing acrylic acid at a high yield while preventing polymerization while maintaining conditions for purifying acrylic acid within a certain range. The mixed gas introduced into a step of obtaining acrolein from propylene using a reactor in which a first reaction zone and a second reaction zone are formed by different reaction tubes has a propylene concentration of 7 to 15% by volume. The water concentration in the mixed gas is set to 0 to 10% by volume, the obtained acrylic acid-containing gas is collected by an acrylic acid collecting tower, and the water concentration of the collecting tower bottom liquid is set to 1 to 45% by mass. Acrylic acid is produced in a high yield while reducing the complexity of the subsequent processing steps and preventing the generation of a polymer of acrylic acid. [Selection diagram] None |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2008162957-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-4639655-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2003238485-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8604238-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2006002028-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2008081907-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2008162956-A |
| priorityDate |
2002-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |