Title:
(メタ)アクリル酸および(メタ)アクリル酸エステルの製造方法
Document Type and Number:
Japanese Patent JP4555473
Kind Code:
B2
Abstract:
A process for preparing pure (meth)acrylic acid or a (meth)acrylate starting from a crude (meth)acrylic acid, which comprises the following stages:A: treating the crude (meth)acrylic acid with at least one compound which is able to remove aldehydes, to give an aldehyde-free crude (meth)acrylic acid;B: subjecting the aldehyde-free crude (meth)acrylic acid to imprecise distillation, to give a low-boiling fraction comprising (meth)acrylic acid and acetic acid and a high-boiling fraction comprising (meth)acrylic acid and high boilers;C: isolating a pure (meth)acrylic acid from the high-boiling fraction and, if desired,D: esterifying the low-boiling fraction comprising (meth)acrylic acid and acetic acid that is obtained in stage B by means of one or more alkanols, to give an esterification mixture comprising one or more (meth)acrylates, one or more acetic esters, and one or more alkanols.
Inventors:
Heinrich Eichinger
Hans Martin
Gerhard nestler
Hans Martin
Gerhard nestler
Application Number:
JP2000541131A
Publication Date:
September 29, 2010
Filing Date:
March 24, 1999
Export Citation:
Assignee:
BASF SE
International Classes:
C07C51/44; C07C27/02; C07C51/487; C07C51/50; C07C53/10; C07C57/04; C07C57/07; C07C57/075; C07C67/08; C07C69/14; C07C69/54
Domestic Patent References:
| JP7149687A | ||||
| JP8208558A |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel