Process for producing (meth)acrylic acids

Details Process for producing (meth)acrylic acids Process for producing (meth)acrylic acids

2008-03-25

2008-03-25

Zucker, Paul A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C562S549000, C562S595000

Reexamination Certificate

active

10859221

ABSTRACT:
A process for producing (meth)acrylic acid or (meth)acrylic acid esters, which comprises a reaction step comprising vapor phase catalytic oxidation of propylene, propane or isobutylene and, if necessary, a reaction step comprising an esterification step, characterized in that at the time when a high boiling mixture (hereinafter referred to as a high boiling material) containing a Michael addition product, is decomposed in a decomposition reactor to recover (meth)acrylic acids, while forcibly imparting a liquid flow in the circumferential direction to a liquid reaction residue in the decomposition reactor, the liquid reaction residue is discharged. In a process for recovering a valuable substance by thermally decomposing the high boiling material containing the Michael addition product of (meth)acrylic acids, it is possible to transfer the decomposition residue from the decomposition reactor to the storage tank without clogging, whereby a long-term continuous operation is possible.

REFERENCES:
patent: 3666794 (1972-05-01), Otsuki et al.
patent: 5458414 (1995-10-01), Crump et al.
patent: 5504247 (1996-04-01), Saxer et al.
patent: 5734075 (1998-03-01), Fauconet et al.
patent: 5847050 (1998-12-01), Toritani et al.
patent: 6252110 (2001-06-01), Uemura et al.
patent: 6420498 (2002-07-01), Konaka et al.
patent: 6436245 (2002-08-01), Nishimura et al.
patent: 6482981 (2002-11-01), Ueno et al.
patent: 0 780 360 (1997-06-01), None
patent: 0 887 334 (1998-12-01), None
patent: 4-90839 (1992-03-01), None
patent: 7-48311 (1995-02-01), None
patent: 8-183756 (1996-07-01), None
patent: 8-225486 (1996-09-01), None
patent: 9-71603 (1997-03-01), None
patent: 9-183753 (1997-07-01), None
patent: 10-298132 (1998-11-01), None
patent: 11-12222 (1999-01-01), None
patent: 2000-262880 (2000-09-01), None
patent: 2001-139605 (2001-05-01), None
patent: 2001-199931 (2001-07-01), None
patent: 2002-60402 (2002-02-01), None

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