Title:
無水マレイン酸およびその水素化誘導体の同時生成方法
Document Type and Number:
Japanese Patent JP4933037
Kind Code:
B2
Abstract:
A process is described for the co-production of maleic anhydride and at least one C4 compound selected from butane-1,4-diol, gamma -butyrolactone, and tetrahydrofuran in which maleic anhydride is produced by partial oxidation of a C4 hydrocarbon feedstock to yield a vaporous reaction effluent stream comprising maleic anhydride, water, unconverted hydrocarbon feedstock, and carbon oxides. A part of the maleic anhydride present in the vaporous reaction effluent stream is condensed to form a crude maleic anhydride stream and leave a residual vaporous stream containing residual amounts of maleic anhydride. Further maleic anhydride is absorbed.from the residual vaporous stream by absorption in an organic solvent, water or an aqueous solution. Maleic anhydride is then recovered from the loaded liquid absorption medium. Said at least one C4 compound is produced by hydrogenation of a C4+ hydrogenation feedstock selected from maleic anhydride, maleic acid, dialkyl maleates, and mixtures of two or more thereof. The process is characterised in that the vaporous reaction effluent stream is cooled prior to step (iii), that a guard bed of a phosphorus-absorbing material is placed in the path of the cooled vaporous reaction effluent stream prior to step (iii) thereby to remove phosphorus-containing materials therefrom, and that material of the crude maleic anhydride stream of step (iii) is used as the C4+ hydrogenation feedstock of step (viii) or is used to prepare the C4+ hydrogenation feedstock of step (viii).
Inventors:
Sutton, David, Mark
Heils, Andrew, George
Bucks, Adrian, Francis
Heils, Andrew, George
Bucks, Adrian, Francis
Application Number:
JP2004221745A
Publication Date:
May 16, 2012
Filing Date:
July 29, 2004
Export Citation:
Assignee:
DAVY PROCESS TECHNOLOGY LIMITED
International Classes:
C07C27/12; C07B61/00; C07C29/149; C07C31/20; C07C51/215; C07C51/31; C07C51/573; C07C57/145; C07D307/08; C07D307/33; C07D307/60; C07D315/00
Domestic Patent References:
| JP49081314A | ||||
| JP11092473A | ||||
| JP2003511428A | ||||
| JP4507411A | ||||
| JP49033929B1 |
Foreign References:
| WO1997043242A1 | ||||
| WO1997043234A1 |
Attorney, Agent or Firm:
Akio Miyazaki
Ishibashi Masayuki
Masaaki Ogata
Ishibashi Masayuki
Masaaki Ogata