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(19)

RU

(11)

2 491 271

(13)

C2

(51)

IPC

C07C51/36(2006-01-01)

C07C51/42(2006-01-01)

C07C57/04(2006-01-01)

B01J23/652(2006-01-01)

C07C51/21(2006-01-01)

B01J23/16(2006-01-01)

B01J23/28(2006-01-01)

B01J23/30(2006-01-01)

B01J27/57(2006-01-01)

C07C51/487(2006-01-01)

C07C57/07(2006-01-01)

(21) (22)

Application

2008137274/04, 2008-09-18

(24)

Start date

2008-09-18

(22)

Actual filing date

2008-09-18

(45)

Published

2013-08-27

(72)

Inventor

Khan SkottSjuj Tszin'Tsu

(73)

Holder

Rom Ehnd Khaas Kompani

IMPROVED METHOD FOR SELECTIVE REMOVAL OF PROPIONIC ACID FROM (METH)ACRYLIC ACID STREAMS Russian patent published in 2013 - IPC C07C51/36 C07C51/42 C07C57/04 B01J23/652 C07C51/21 B01J23/16 B01J23/28 B01J23/30 B01J27/57 C07C51/487 C07C57/07 

Abstract RU 2491271 C2

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method for selective removal of propionic acid impurities from an acrylic acid stream. The method involves reacting an acrylic acid stream in the presence of a mixed metal oxide catalyst meant for removing propionic acid, wherein the mixed metal oxide catalyst contains a mixed metal oxide of the empirical formula AaMbNcXdZeOf, in which A is Mo, M is V, N is Te, X is Nb and Z is Pd, and O is oxygen in the oxide and in which if a=1, b=0.01-1.0, c=0.01-1.0, d=0.01-1.0, c=0-0.1 and f depends on the oxidation state of other elements.

EFFECT: improved method for selective removal of propionic acid impurities from an acrylic acid stream.

8 cl, 2 tbl, 2 ex

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RU 2 491 271 C2

Authors

Khan Skott

Sjuj Tszin'Tsu

Dates

2013-08-27—Published

2008-09-18—Filed

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