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2 157 387

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Application

98116731/04, 1998-08-31

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Start date

1998-08-31

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Actual filing date

1998-08-31

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Published

2000-10-10

(72)

Inventor

Zharikov L.K.Tikhonova G.G.Trofimov V.N.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

METHOD OF PREPARING 1,2-DIHYDRO-2,2,4-TRIMETHYLQUINOLINE Russian patent published in 2000 - IPC

Abstract RU 2157387 C2

FIELD: chemical industry, more particularly preparation of 1,2-dihydro 2,2,4-trimethylquinoline used as rubber aging inhibitor. SUBSTANCE: method comprises condensing aniline with acetone in the presence of anhydrous catalyst followed by polymerization of condensation product in the presence of hydrochloric acid, neutralization of polymerization product, aqueous toluene extraction and recovery product from organic product. Mixture of aniline with acetone at weight ratio of 1-0.2- 0.8, respectively, is presaturated with hydrogen chloride, and condensation is carried out under pressure. EFFECT: more efficient preparation method. 4 cl, 7 ex, 1 tbl

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RU 2 157 387 C2

Authors

Zharikov L.K.

Tikhonova G.G.

Trofimov V.N.

Dates

2000-10-10—Published

1998-08-31—Filed

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