发明名称 |
Process for the production of acrylic acid |
摘要 |
The present invention provides an improved process for production of acrylic acid by subjecting propylene and/or acrolein to catalytic gas-phase oxidation with a molecular oxygen-containing gas. In the process, the mixed gas obtained by the catalytic gas-phase oxidation is contacted with an aqueous collecting agent containing acrylic acid, acetic acid and a poorly-soluble-in-water solvent, to form an aqueous acrylic acid solution; and the aqueous acrylic acid solution is subjected to azeotropic distillation in the presence of a poorly-soluble-in-water solvent to remove by-products and obtain high-purity acrylic acid.
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申请公布号 |
US5785821(A) |
申请公布日期 |
1998.07.28 |
申请号 |
US19960759219 |
申请日期 |
1996.12.05 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
SAKAMOTO, KAZUHIKO;NAKAHARA, SEI;TAKEDA, TAKAHIRO;UEOKA, MASATOSHI;AKAZAWA, YOHJI |
分类号 |
C07C57/05;C07C51/42;C07C51/46;C07C57/055;C07C57/07;(IPC1-7):B01D3/34 |
主分类号 |
C07C57/05 |
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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