liquid antioxidant produced by alkylating diphenylamine

us4824601a - liquid antioxidant produced by alkylating

US4824601A - Liquid antioxidant produced by alkylating

Process is described for the production of a liquid antioxidant composition by reaction of diphenylamine with diisobutylene comprising reacting diphenylamine with diisobutylene in a molar ratio of from 1:1.1 to 1:2.5 and in the presence of an acid activated earth catalyst, while ensuring that the concentration of diisobutylene remains substantially constant throughout the reaction period at a

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liquid antioxidant produced by alkylating diphenylamine with

Liquid antioxidant produced by alkylating diphenylamine with

Liquid antioxidant composition produced by reacting diphenyl-amine with diisobutylene in a molar ratio of 1:1.1 to 1:2.5 in the presence of an acid-activated earth catalyst, at a reaction temperature of at least 160° C., the reaction being effected for such a period that the content of 4,4'-di-t-octyldiphenylamine in the final reaction mass

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us5672752a - liquid alkylated diphenylamine antioxidant

US5672752A - Liquid alkylated diphenylamine antioxidant

The disclosed process uses clay catalysts which favor monoalkylation over dialkylation and specific conditions such as reaction temperature and mole ratios of alkylating olefin to diphenylamine. Liquid alkylated diphenylamine antioxidant

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us patent for liquid alkylated diphenylamine antioxidant

US Patent for Liquid alkylated diphenylamine antioxidant

A process for alkylating diphenylamine which results in high amounts of desirable monosubstituted diphenylamine antioxidants is described. These monoalkylated diphenylamines have good antioxidant activity in various lubricating oils and polymeric molding compositions. These antioxidants are low in yellow color and resist further yellowing. 2.

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liquid alkylated diphenylamine antioxidant - the bfgoodrich

Liquid alkylated diphenylamine antioxidant - The BFGoodrich

Liquid antioxidant produced by alkylating diphenylamine with a molar excess of diisobutylene: 1989-04-25: Franklin: 3655559: ALKYLATED DIPHENYLAMINES AS STABILIZERS: 1972-04-11: Holt: 3452056: SUBSTITUTED DIPHENYLAMINES: 1969-06-24: Sundholm: 2943112: Alkylation of diphenylamine: 1960-06-28: Popoff et al.

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cn1112348c - method for preparing liquid alkyl diphenylamine

CN1112348C - Method for preparing liquid alkyl diphenylamine

The present invention relates to a preparation method of liquid alkylated diphenylamine, which comprises: diisobutylene and diphenylamine are subjected to a contact reaction in the presence of active clay as a catalyst at the temperature of 170 to 230DEG C at the pressure of 0.2 to 0.5MPa; the reaction is stopped when the diphenylamine content of 4, 4'-ditert octyl in products is less than 20

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discontinuous alkylation of diphenylamine with nonene for

Discontinuous alkylation of diphenylamine with nonene for

Preparation method of alkylated diphenylamine antioxidant with high color stability CN 102659606 B. Liquid antioxidant produced by alkylating diphenylamine with a molar excess of diisobutylene

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discontinuous alkylation of diphenylamine with nonene for

Discontinuous alkylation of diphenylamine with nonene for

Franklin J (1989) Liquid antioxidant produced by alkylating diphenylamine with a molar excess of diisobutylene US 4824601 A Horňáček M, Hudec P, Smiešková A, Jakubík T (2010) Alkylation of benzene with 1-alkenes over beta zeolite in liquid phase.

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