Texaco Chemical Company

Texaco Inc.

Texaco Development Corporation

Huntsman Corporation

James H Templeton

George P Speranza

Jiang-Jen Lin

Wei-Yang Su

Ernest L Yeakey

John M Larkin

Michael E Brennan

Donald H Champion

Disclosed is a one-step method for preparing N-alkylpiperazines which eliminates the initial preparation and isolation of piperazine which comprises reacting a carbonyl compound and an amine in the presence of hydrogen over a metallic hydrogenation-dehydrogenation catalyst from Group VIII of the Periodic Table such as, for example, nickel, copper, cobalt, chromium, palladium, platinum or ruthenium, alone or in combination with other Group VIII metals or transition metals selected from the group consisting of manganese, iron, zinc, copper and chromium.

Preparation of N-alkylpiperazines

Disclosed is an improvement in a process for production of cyclohexane by liquid phase hydrogenation of benzene wherein no diluent is necessary, which comprises contacting benzene and hydrogen in the presence of a mixed catalyst bed comprising a first catalyst which is a less active hydrogenation catalyst selected from elements of Group VIII of the Periodic Table and a second, more active catalyst, comprising a Group VIII metal supported on an oxide, such as, for example, alumina, silica or titania at a temperature of about 40.degree. C. to about 300.degree. C. and pressure sufficient to keep the benzene liquid at the chosen reaction temperature.

Process for the production of cyclohexane by liquid phase hydrogenation

Secondary alkyl amine derivatives of ethylenediamine are formed in a one-step reaction when ethylenediamine is substantially simultaneously continuously mixed with a methyl alkyl ketone to form a reaction mixture which is continuously hydrogenated in the presence of a hydrogenation catalyst and hydrogen, the alkyl group containing 1 to 4 carbon atoms.

Secondary alkyl amine derivatives of ethylenediamine

Secondary isopropylamine terminated polyoxyethylene and/or polyoxypropylene diamines or triamines are formed in a one-step reaction when a polyoxyethylene and/or polyoxypropylene primary diamine or triamine is hydrogenated with hydrogen in the presence of a hydrogenation catalyst, hydrogen and acetone. The secondary isopropylamine terminated polyoxyethylene and/or polyoxypropylene primary diamines or triamines are useful as curing agents for epoxy resins.

Secondary isopropyl amine derivatives of polyoxyalkylene diamines and

Secondary isopropylamine terminated oxyethylene and/or oxypropylene diamines or triamines are prepared by reacting an oxyethylene and/or oxypropylene primary diamine or triamine with acetone in the presence of a hydrogenation catalyst and hydrogen. The secondary isopropylamine terminated oxyethylene and/or oxypropylene derivatives are useful as curing agents for epoxy resins.

Secondary isopropyl amines derived from oxyalkylene triamines

Disclosed is a process for preparing predominantly linear polyethylenepolyamines from the catalyzed reaction of (1) an ethyleneamine and an alkanolamine, (2) ethyleneamines or (3) an alkanolamine and ammonia. The catalyst employed is a silica-alumina catalyst. An acidic phosphorus cocatalyst may be used in conjunction with the silica-alumina catalyst.

Preparation of linear polyethylenepolyamines with silica-alumina

A process for simultaneously producing a 2-(2-aminoalkoxy)alkanol compound and a morpholine compound is disclosed wherein an oxydialkanol is contacted with ammonia in the presence of a catalytically effective amount of a hydrogenation/dehydrogenation catalyst at a temperature of from about 190.degree. C. to about 230.degree. C. and at a pressure ranging from about 700 psig to about 2200 psig, said oxydialkanol having the formula: ##STR1## wherein each R is, independently, a hydrogen or a lower alkyl radical; and recovering said 2-(2-aminoalkoxy)alkanol compound and said morpholine compound from the resulting reaction mixture.

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Austin, TX, United States of America

James H Templeton