Abstract: The invention relates to a process for the preparation of an aminonitrile by partially hydrogenating a nitrile compound with two or more nitrile groups in the presence of a catalyst which contains a metal from group 8 of the periodic system of the elements, the hydrogenation being carried out under water-free reaction conditions and the catalyst having been treated with an alkanolate. Preferably, the catalyst is a Raney nickel or Raney cobalt catalyst which has been pretreated with an alkali metal alkanolate or an earth alkali metal alkanolate such as sodium or potassium methanolate.
Type:
Grant
Filed:
August 17, 1994
Date of Patent:
November 12, 1996
Assignee:
DSM N.V.
Inventors:
Hubertus J. M. Bosman, Franciscus H. A. M. J. Vandenbooren
Abstract: Aliphatic .alpha.,.omega.-aminonitriles are prepared by partial hydrogenation of aliphatic .alpha.,.omega.-dinitriles at elevated temperatures and superatmospheric pressure in the presence of a solvent and of a catalyst, by a process in which the catalyst used is obtainable by thermal decomposition of a metal compound selected from the group consisting of metal carbonyl compounds, metal salts of C.sub.1 -C.sub.6 -carboxylic acids and C.sub.2 -C.sub.6 -dicarboxylic acids and metal complexes with diketones to give the corresponding metal and/or a metal oxide thereof, with the proviso that the metal used is nickel or cobalt.
Type:
Grant
Filed:
January 10, 1995
Date of Patent:
September 17, 1996
Assignee:
BASF Aktiengesellschaft
Inventors:
Klemens Flick, Klaus Ebel, Werner Schnurr, Johann-Peter Melder, Wolfgang Harder
Abstract: Aliphatic alpha, omega-aminonitriles are prepared by partial hydrogenation of aliphatic alpha, omega-dinitriles at elevated temperatures and superatmospheric pressure in the presence of a solvent and of a catalyst by a process which comprises using a catalyst which(a) contains a compound based on a metal selected from the group consisting of nickel, cobalt, iron, ruthenium and rhodium and(b) contains from 0.
Type:
Grant
Filed:
January 18, 1995
Date of Patent:
June 18, 1996
Assignee:
BASF Aktiengesellschaft
Inventors:
Klemens Flick, Johann-Peter Melder, Werner Schnurr, Klaus Ebel, Tom Witzel, Wolfgang Harder, Alwin Rehfinger, Rolf Fischer
Abstract: Aliphatic alpha,omega-aminonitriles are prepared by partial hydrogenation of aliphatic alpha,omega-dinitriles at elevated temperatures and superatmospheric pressure in the presence of a base and of a hydrogenation catalyst, by carrying out the hydrogenation in the presence of ammonia and lithium hydroxide or of a compound which gives lithium hydroxide during the hydrogenation.
Type:
Grant
Filed:
January 10, 1995
Date of Patent:
April 30, 1996
Assignee:
BASF Aktiengesellschaft
Inventors:
Werner Schnurr, Rolf Fischer, Peter Bassler, Wolfgang Harder
Abstract: Aliphatic alpha,omega-aminonitriles are prepared by partial hydrogenation of aliphatic alpha,omega-dinitriles at elevated temperatures in the presence of a catalyst in the gas phase by a process which comprises carrying out the hydrogenation with a catalyst based on at least one metal selected from the group consisting of nickel, cobalt, ruthenium and rhodium and with the proviso that the catalyst is not a powder.
Type:
Grant
Filed:
January 17, 1995
Date of Patent:
April 16, 1996
Assignee:
BASF Aktiengesellschaft
Inventors:
Werner Schnurr, Joachim Wulff-Doring, Rolf Fischer, Rudolf Bazner
Abstract: A process for preparing 5-cyanovaleramide by reacting adiponitrile with water at from 50.degree. to 200.degree. C. in the presence of a supported unionized-copper catalyst comprises employing from 1 to 15 mol of water per mole of adiponitrile and a residence time of from 5 to 60 minutes.
Type:
Grant
Filed:
June 28, 1993
Date of Patent:
September 13, 1994
Assignee:
BASF Aktiengesellschaft
Inventors:
Tom Witzel, Eberhard Fuchs, Franz Merger
Abstract: A process for the conversion of adiponitrile to 6-aminocapronitrile in high yield and high selectivity using Raney nickel catalyst and a reaction mixture containing a low valent transition metal complex.
Abstract: A process for preparing mixtures of 3-aminopropionitrile of the formula IH.sub.2 N--CH.sub.2 --CH.sub.2 --CN (I)and ethylene cyanohydrin of the formula IIHO--CH.sub.2 --CH.sub.2 --CN (II)comprises reacting bis(2-cyanoethyl) ether of the formula IIINC--CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CH.sub.2 --CN (III)with ammonia at from 50 to 170.degree. C. and under from 1 to 500 bar thermally or in the presence of a heterogeneous catalyst.
Type:
Grant
Filed:
April 19, 1993
Date of Patent:
December 7, 1993
Assignee:
BASF Aktiengesellschaft
Inventors:
Franz Merger, Martin Brudermueller, Wolfgang Harder, Juergen Hartig, Dieter Franz
Abstract: Selective hydrogenation of aliphatic dinitriles to aminonitriles is achieved under low pressure with high yield preferably using a Raney nickel or Raney colbalt-containing catalyst.
Abstract: A process for preparing .alpha.-formylamino nitriles of the formula I ##STR1## where R.sup.1 and R.sup.2 are each hydrogen or unsubstituted or substituted, with substituents which are inert under the reaction conditions, aliphatic or heteroaliphatic radicals with 1 to 10, cycloaliphatic or heterocycloaliphatic radicals with 3 to 6, araliphatic radicals with 7 to 12, heteroaraliphatic radicals with 4 to 12, aromatic radicals with 6 to 10 or heteroaromatic radicals with 3 to 10 carbon atoms, by reacting cyanohydrins of the formula II ##STR2## with the formamide III ##STR3## in the presence of acids, entails adding at least one ammonium salt to the reaction mixture.
Abstract: The hydrogenation of olefins containing nitrile groups in the homogeneous phase can be carried out particularly successfully using specific ruthenium complexes which are non-sensitive to air and have high catalytic activity.
Abstract: The selective hydrogenation of unsaturated compounds which carry reducible groups containing nitrogen succeeds in a homogeneous phase with the preservation of the reducible groups containing nitrogen, characterized in that a compound of the formulaRuH.sub.2n L.sub.5-nis used as a catalyst, in whichL signifies a phosphane or arsane andn signifies 1 or 2.
Type:
Grant
Filed:
May 18, 1988
Date of Patent:
December 18, 1990
Assignee:
Bayer Aktiengesellschaft
Inventors:
Paul Fiedler, Hartmuth Buding, Rudolf Braden
Abstract: Carbon-carbon double bonds are hydrogenated selectively in a compound containing a reducible, nitrogen-containing group if the hydrogenation is carried out in the presence of a ruthenium complex catalyst. Also disclosed are new ruthenium complexes for use in such selective hydrogenation.
Type:
Grant
Filed:
October 11, 1984
Date of Patent:
June 16, 1987
Assignee:
Bayer Aktiengesellschaft
Inventors:
Paul Fiedler, Rudolf Braden, Hartmuth Buding
Abstract: A dinitrile is hydrogenated to an omega-aminonitrile with hydrogen with a supported highly dispersed rhodium catalyst and only ammonia present. The catalyst is prepared by hydrolyzing a rhodium(III) halide or nitrate with strong aqueous base at elevated temperatures, drying the supported rhodium hydroxide at elevated temperatures and intimately contacting with hydrogen the dried product with hydrogen at 260.degree.-360.degree. C. High conversions, selectivity to aminonitrile and long catalyst service times and catalyst recyclability are achieved in the absence of an aprotic solvent.
Type:
Grant
Filed:
May 4, 1984
Date of Patent:
July 22, 1986
Assignee:
Allied Corporation
Inventors:
James E. Galle, Frank Mares, Steven E. Diamond, Jeffrey Corsi, Francis J. Regina
Abstract: The selective hydrogenation of unsaturated compounds which carry reducible groups containing nitrogen succeeds in a homogeneous phase with the preservation of the reducible groups containing nitrogen, characterized in that a compound of the formulaRuH.sub.2n L.sub.5-nis used as a catalyst, in whichL signifies a phosphane or arsane andn signifies 1 or 2.
Type:
Grant
Filed:
July 29, 1992
Date of Patent:
February 15, 1994
Assignee:
Bayer Aktiengesellschaft
Inventors:
Paul Fiedler, Hartmuth Buding, Rudolf Braden