Title:
アクリル酸およびメタクリル酸の製造方法
Document Type and Number:
Japanese Patent JP4243016
Kind Code:
B2
Abstract:
A process for preparing acrylic acid or methacrylic acid comprises preparing a gaseous product mixture having essentially the composition of a reaction mixture of the catalytic gas phase oxidation of C3-/C4-alkanes, -alkenes, -alkanols and/or -alkanals and/or precursors thereof to form acrylic acid or methacrylic acid. The product is removed from the gaseous product mixture by a process comprising the following steps:(a) condensing said gaseous product mixture,(b) crystallizing acrylic acid or methacrylic acid from the solution obtained in step (a),(c) removing the resulting crystals from the mother liquor, and(d) recycling at least a portion of said mother liquor from step (c) into step (a).
Inventors:
Bernd Eck
Otto mach hammer
Theoprol
Volker Shrep Haake
Joachim Teal
Klaus Breros
Otto mach hammer
Theoprol
Volker Shrep Haake
Joachim Teal
Klaus Breros
Application Number:
JP2000511735A
Publication Date:
March 25, 2009
Filing Date:
September 09, 1998
Export Citation:
Assignee:
BASF SE
International Classes:
C07C51/43; C07C51/44; C07C57/07
Domestic Patent References:
| JP7278045A |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Previous Patent: 日付の調整機構
Next Patent: FORMATION OF PROTECTIVE FILM FOR MAGNETIC DISK RECORDING MEDIUM
Next Patent: FORMATION OF PROTECTIVE FILM FOR MAGNETIC DISK RECORDING MEDIUM