http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2415836-C2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b267af6ac91d92a643aa0e1bbee7a66a http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c1a0fe5da91186fc3a1fdd768db6b392 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-265 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C27-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43 |
| filingDate | 2009-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2011-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0ef7698e9b7433ade055ec687a5ad227 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_384c78b02d57939e994683fc6ffaff70 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ecd016f0057f6abd3f83ed80224ec573 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7f5d19a36e16790a0ca9ac7662ebd0a5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dee1c0c53444cc84958c7da373bf4268 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_222c8bda969b9c61890fd4b93a1c3627 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0c0f7e90ef7a4672685c391fbff2f8b7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4fa44c55d158543d644e8bce6ff271b2 |
| publicationDate | 2011-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2415836-C2 |
| titleOfInvention | Method of producing pure isophthalic acid and by-products from isomers of cymene and diisopropylbenzene |
| abstract | FIELD: chemistry. n SUBSTANCE: invention relates to organic and petrochemical synthesis, specifically to the technological process of producing pure isophthalic acid and by-products - terephthalic and formylic acid through oxidation of isomers of cymene or diisopropylbenzene with an oxygen-containing gas in an acetic acid medium in the presence of a catalyst which contains salts of heavy metals and halide compounds at high temperature and pressure to a defined degree of conversion of the said isomer mixtures to isophthalic acid and by-products, followed by separation and purification of pure isophthalic acid and by-products through re-crystallisation in water, where isomers of cymene or diisopropylbenzene are oxidised in two steps at temperature 120-140°C at the first step and 150-160°C at the second step, in conditions where concentration of the Co-Mn catalyst increases in steps in the range 1300-1800 ppm (0.130-0.180%) at the first step, 1800-2400 ppm (0.180-0.240%) at the second step, promoted by halide compounds, reducing pressure in the range 0.9-1.6 MPa with pressure fall gradient between the steps in the range 0.2-0.6 MPa; purification and separation of the reaction mass obtained after oxidation, separation of the solid crystalline product and washing with acetic acid, carrying out re-crystallisation in water with preliminary holding of the aqueous suspension of the isophthalic acid and terephthalic acid mixture at temperature 225-235°C for 10-15 minutes and successive step-by-step extraction of the desired products and by-products: at 150-190°C - extraction of solid terephthalic acid to obtain aqueous mother solution, and at 60-80°C - extraction of solid isophthalic acid form the said mother solution and washing the extracted isophthalic acid with 2-2.5-fold amount of water to obtain isophthalic acid with the following qualities: chromaticity, °H, ≤10 - m-carboxybenzaldehyde [M-CBA], %, ≤0.002 - m-toluic acid [M-TA], %, ≤0.005 - benzoic acid [BA] %, ≤0.005. n EFFECT: efficient method of producing pure isophthalic acid. n 2 cl, 2 tbl, 17 ex |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2014133433-A1 |
| priorityDate | 2009-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 77.