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2 259 995

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IPC

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Application

2004110088/04, 2004-04-02

(24)

Start date

2004-04-02

(22)

Actual filing date

2004-04-02

(45)

Published

2005-09-10

(72)

Inventor

Bikbulatov I.Kh.Kondrat'Ev V.V.Shulaev N.S.Daminev R.R.Maslova M.S.

(73)

Holder

Gosudarstvennoe Obrazovatel'Noe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Gosudarstvennyj Neftjanoj Tekhnicheskij Universitet" Vpo Ugntu)

METHOD FOR PREPARING $$$-(4-HYDROXY-3,5-DI-TERTIARY-BUTYLPHENYL)PROPIONIC ACID ESTERS Russian patent published in 2005 - IPC

Abstract RU 2259995 C1

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a method for preparing β-(4-hydroxy-3,5-di-tert.-butylphenyl)propionic acid esters that are used in polymeric industry as stabilizing agents. Method is carried out by the re-esterification reaction of β-(4-hydroxy-3,5-di-tert.-butylphenyl)propionic acid methyl ester with polyhydric alcohols at enhanced temperatures (130-190°C) in the inert gas flow in the presence of catalyst comprising the following components, wt.-%: sodium 4-(β-methylcarboxyethyl)-2,6-di-tert.-butylphenolate, 30.0-45.5, and sodium aluminate, 54.5-70.0. Indicated compounds of alkaline metal are used in the amount 0.7-6.0 mole% of the amount of β-hydroxy-3,5-di-tert.-butylphenol)propionic acid methyl ester. Invention provides enhancing yield and improving color index, reducing cost of the process and reducing amount of by-side products formed.

EFFECT: improved preparing method.

2 cl, 1 tbl, 10 ex

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RU 2 259 995 C1

Authors

Bikbulatov I.Kh.

Kondrat'Ev V.V.

Shulaev N.S.

Daminev R.R.

Maslova M.S.

Dates

2005-09-10—Published

2004-04-02—Filed