scispace - formally typeset
Search or ask a question

Showing papers on "Nickel boride published in 1986"


Journal ArticleDOI
TL;DR: In this paper, the reduction par Ni 2 B/N 2 H 4 •H 2 O de [benzyloxy-2' nitro-6' styryl]-1 piperidine en benzyloxy 4 indole was discussed.
Abstract: Etude de la reduction par Ni 2 B/N 2 H 4 •H 2 O de [benzyloxy-2' nitro-6' styryl]-1 piperidine en benzyloxy-4 indole et application a la reduction de nitro-2' alkyl-3 indoles en amino-2' alkyl-3 indoles

89 citations


Journal ArticleDOI
TL;DR: Nickel boride, conveniently prepared in situ from nickel (II) chloride hexahydrate and sodium borohydride, cleanly desulphurises thioethers in excellent yields.

20 citations


Journal ArticleDOI
TL;DR: In this article, a new nickel boride catalyst, DBNi, was proposed for hydrogenation of cyclohexanone and nitrobenzene using diborane as reducing agent.

14 citations


Patent
16 Oct 1986
TL;DR: Nickel boride hydrogenation catalysts stabilized with polyvinylpyrrolidone, having constant excellent quality, are prepared by incorporating glycerol monooleate before the alcohol is evaporated off.
Abstract: Nickel boride hydrogenation catalysts stabilized with polyvinylpyrrolidone, having constant excellent quality, are prepared by incorporating glycerol monooleate before the alcohol is evaporated off.

7 citations



Journal ArticleDOI
TL;DR: A nickel boride dechlorination method was employed whereby a precipitate of nickel Boride is produced in situ and gives rise to one GC peak (decachlorobiphenyl) which is well removed from most interfering peaks.
Abstract: The determination of polychlorinated biphenyls (PCBs) in environmental samples presents the analyst with many problems. PCBs occur as complex mixtures in the environment at variable concentrations ranging from the low ppb to the ppm level. Most sample extracts need to be subjected to an extensive cleanup procedure prior to GC analysis. In order to overcome some of these problems, perchlorination of the PCBs has been used; this gives rise to one GC peak (decachlorobiphenyl) which is well removed from most interfering peaks, but this technique has been found to be qualitatively and quantitatively unreliable. Dechlorination has also been proposed. A nickel boride dechlorination method was employed whereby a precipitate of nickel boride is produced in situ.

2 citations


Patent
05 Feb 1986
TL;DR: In this article, a novel alumina-supported nickel boride catalysts prepared by the borohydride promoted reduction of nickel arsenate are described and a method of catalyst preparation and process for hydrogenation of acetylenic and diolefinic compounds employing the invention catalysts are also described.
Abstract: Novel alumina-supported nickel boride catalysts prepared by the borohydride promoted reduction of nickel arsenate are described. Method of catalyst preparation and process for hydrogenation of acetylenic and diolefinic compounds employing the invention catalysts are also described.

1 citations



Patent
24 Feb 1986
TL;DR: In this article, the authors proposed a method to prevent the deterioration in activity and changes with time of the titled catalyst by allowing aromatic hydroperoxide and/or aromatic peroxide to react catalytically with hydrogen under the presence of a catalyst or a catalytic carrier having water repellency.
Abstract: PURPOSE:To prevent the deterioration in activity and changes with time of the titled catalyst by allowing aromatic hydroperoxide and/or aromatic peroxide to react catalytically with hydrogen under the presence of a catalyst or a catalytic carrier having water repellency. CONSTITUTION:The dispersed soln. of substances having water repellency such as polytetrafluoroethylene is impregnated into a carrier such as alumina, activated carbon, carborundum and zeolite and the carrier is calcined at 200-400 deg.C to deposit 0.01-40% water repellent components thereon. The catalyst for producing aromatic alcohol is obtained by depositing the catalytic active components such as Pd, Pt, Fe, Ni, Rh, Cu and nickel boride on the carrier given with the water repellency. The aromatic alcohol is produced by allowing aromatic hydroperoxide and/or aromatic peroxide to react catalytically with hydrogen under the presence of this catalyst.