http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2479564-C1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_523dcda09da62fe7a254a03b5241f5ce |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J19-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D9-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-09 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F23G7-04 |
| filingDate | 2012-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-04-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b0c95e6395f14911359d09a99983dec8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_215673312b4960cdf4f561b45ec7d67d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1e134dbb5b0639c3f5769d016126b6c2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_aeebf15ee2870a2bbc9904d34d268534 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c4b140d6c4c393ea4a443af1e5d16f32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f23e92e06dd731d03e820a7248693b56 |
| publicationDate | 2013-04-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2479564-C1 |
| titleOfInvention | Method for saponification of esters when producing caprolactam, apparatus for realising said method, method of recycling sodium salts of organic acids and apparatus for realising said method |
| abstract | FIELD: chemistry.SUBSTANCE: invention relates to an ester saponification method and a method of recycling sodium salts when producing caprolactam, as well as apparatus for realising said methods. The saponification method involves processing a reaction liquid which contains cyclohexane, cyclohexanone, cyclohexanol, cyclohexyl hydroperoxide, esters and organic acids, and involves distillation of the reaction liquid with separation of a portion of recycled cyclohexane, mixing the still liquor with a neutralising agent, neutralisation and saponification of the obtained mixture with separation of the organic layer and aqueous solution of sodium salts of organic acids, distillation of the neutral cyclohexane, drying the ketone-alcohol mixture with separation of cyclohexane and feeding said cyclohexane to the step for distillation of neutral cyclohexane, rectification of the dried ketone-alcohol mixture with separation of cyclohexanone, and thermal decomposition of sodium salts of organic acids. After distillation of the neutral cyclohexane, the still liquor undergoes re-saponification with addition of fresh alkali and further separation of sodium salts of organic acids and unreacted aqueous alkali solution, fed to the first saponification and neutralisation step. The resultant stream of solutions of sodium salts of organic acids is fed for thermal decomposition to form a melt of calcined soda containing 93-95% NaCOand 5-7% NaOH, which, in form of a solution with concentration of 11-17%, is fed as a neutralising agent to the first saponification and neutralisation step. The apparatus for recycling sodium salts of organic acids is fitted with a unit for dissolving the molten soda, which consists of two sections with an overflow gate in between, one of the sections being connected to a unit for feeding chemically purified water and fitted a steam bubbler, and the second section being fitted with a solution outlet into a balance tank with recirculation of the excess into the dissolution unit, and the balance tank is fitted with an outlet into the mixer for mixing the still liquor with the solution of the neutralising agent of the ester saponification apparatus and with recirculation of the excess into the balance tank.EFFECT: improved methods for saponification of esters and recycling sodium salts when producing caprolactam.12 cl, 3 dwg, 2 ex |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113185020-A |
| priorityDate | 2012-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.