http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2817406-T3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c0444efde206a2f829562761e58b7e1e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C53-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-47 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C53-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-47 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-44 |
| filingDate | 2017-05-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_76d313d9eb84f797bee83bf326374f4f |
| publicationDate | 2021-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-2817406-T3 |
| titleOfInvention | Method for the production of acetic acid |
| abstract | A method of producing acetic acid, comprising: a carbonylation reaction step of reacting methanol with carbon monoxide in a reaction vessel in the presence of a catalyst system containing a metal catalyst and methyl iodide as well as acetic acid, methyl acetate, and water to produce acetic acid; an evaporation step of separating a reaction mixture obtained in the carbonylation reaction step into a vapor stream and a residual liquid stream in an evaporator; a lower boiling component removal step of separating the vapor stream by distillation into an upper stream rich in at least one lower boiling component selected from methyl iodide and acetaldehyde and a first rich acetic acid stream in acetic acid; a dehydration step of separating the first acetic acid stream by distillation into an overhead stream rich in water and a second acetic acid stream more enriched with acetic acid than the first acetic acid stream; and an adsorption removal step of treating the second acetic acid stream, or an acetic acid stream that has been further enriched with acetic acid by further purification of the second acetic acid stream, with a cation exchange resin in the that a portion of the exit protons in an exchange group is replaced by silver, where a nickel or zirconium based alloy is used as a material in a distillation column in the dehydration step and as metal ion concentrations in a charge mixture from the distillation column in the dehydration step, a concentration of iron ions is less than 9,000 ppb by mass, a concentration of chromium ions is less than 4,000 ppb by mass, a concentration of nickel ions is less than 2,500 ppb by mass, and a concentration of molybdenum ions is less than 1,700 ppb by mass and a concentration of zinc ions is less than 800 ppb by mass, and where for cont Rolling the metal ion concentrations in the loading mixture to be within the above ranges, the method includes at least one of (i) employing a nickel or zirconium based alloy as the material from the loading pipe to the column of distillation in the dehydration step; (ii) providing an ion exchange resin column or vessel at a position between an outlet of the reaction vessel and an inlet to the distillation column in the dehydration step, and (iii) using methanol having an ion content zinc of less than 10 ppm by mass as methanol that must be fed to the reaction vessel. |
| priorityDate | 2017-03-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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