http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-10225927-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C31-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-132 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-149 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-149 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C31-20 |
| filingDate | 2002-06-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_69c2cb5be0b496ad8971452c2cd71ab3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_654c78cbb895167ecc5dc765c20e0cba http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_56dbaf45400e4688805e38d614844ac5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d31a23160581ae1185bc2c6c5d29ead4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ac35a468f3a40f6346053e60dac624cd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_437b3a36e2320cd1d59bd1fa23c46a70 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_887de63f6f3eac90ac5299791115d178 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1f9fd4448e43f1431e3337e5e2c5b986 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9e919bc6f0753fd94bdcadb2d205a4d8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1c7908a604a64c739bceb7e5e926ff60 |
| publicationDate | 2003-12-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-10225927-A1 |
| titleOfInvention | Process for the production of butanediol by combined gas phase and liquid phase synthesis |
| abstract | The present invention relates to a process for the preparation of optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C¶4¶-dicarboxylic acids and / or their derivatives, with the following steps: DOLLAR A a) introducing a gas stream C¶4¶-dicarboxylic acid or a derivative thereof at 200 to 300 ° C. and 2 to 60 bar in a first reactor and catalytic hydrogenation to give a product which may contain alkyl-substituted gamma-butyrolactone; DOLLAR A b) Conversion of the product stream into the liquid phase; DOLLAR A c) introducing the product stream thus obtained into a second reactor at a temperature of 100 ° C. to 240 ° C. and a pressure of 20 to 250 bar and catalytic hydrogenation in the liquid phase to optionally alkyl-substituted 1,4-butanediol; DOLLAR A d) separation of the desired product from by-products and any unreacted starting material; DOLLAR A e) if appropriate, recycling unreacted intermediates into one or both hydrogenation stages, DOLLAR A wherein a catalyst is used in both hydrogenation stages which is 95% by weight, preferably 5 to 95% by weight, in particular 10 to 80% by weight CuO and> = 5 wt .-%, preferably 5 to 95 wt .-%, in particular 20 to 90 wt .-% of a carrier, a higher pressure prevails in the second reactor than in the first reactor, and the product mixture removed from the first reactor is introduced into the second reactor without further purification. |
| priorityDate | 2002-06-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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