发明名称 |
Process for continuously producing dimethyl carbonate. |
摘要 |
<p>A process for producing dimethyl carbonate is carried out by a first step of catalytically reacting carbon monoxide with methyl nitrite to produce dimethyl carbonate; a second step of absorbing dimethyl carbonate contained in a gas fraction withdrawn from the first step by dimethyl oxalate; a third step of regenerating methyl nitrite by contacting nitrogen monoxide contained in a gas fraction withdrawn from the second step with a molecular oxygen-containing gas and methyl alcohol; a fourth step of collecting dimethyl carbonate by distilling a liquid fraction withdrawn from the second step; and a fifth step of producing and recovering methyl nitrite from a purge gas consisting of a minor portion of a gas fraction withdrawn from one of the second step and the third step by bringing the purge gas together with an ammonia-oxidation product gas into contact with methyl alcohol in a methyl nitrite-recovering column, to thereby produce and recover methyl nitrite contained in the recovering column with a high efficiency at a high level of safety. <IMAGE></p> |
申请公布号 |
EP0655433(A1) |
申请公布日期 |
1995.05.31 |
申请号 |
EP19940118737 |
申请日期 |
1994.11.29 |
申请人 |
UBE INDUSTRIES, LTD. |
发明人 |
NISHIHIRA, KEIGO, C/O UBE CHEMICAL FACTORY;YOSHIDA, SHINICHI, C/O UBE CHEMICAL FACTORY;TANAKA, SHUJI, C/O UBE CHEMICAL FACTORY |
分类号 |
C07C68/00;(IPC1-7):C07C68/00;C07C69/96 |
主分类号 |
C07C68/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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