Search results
Results from the WOW.Com Content Network
Nickel boride is the common name of materials composed chiefly of the elements nickel and boron that are widely used as catalysts in organic chemistry. [ 1 ] [ 2 ] Their approximate chemical composition is Ni 2.5 B, [ 3 ] and they are often incorrectly denoted " Ni
Dinickel boride is a chemical compound of nickel and boron with formula Ni 2 B. [1] [2] It is one of the borides of nickel. The formula "Ni 2 B" and the name "nickel boride" are often used for a nickel-boron catalyst obtained by reacting nickel salts with sodium borohydride.
Trinickel boride can be obtained, as grains embedded in a nickel matrix, by heating Brown's P-1 and P-2 "nickel boride"catalyst to 250 °C. This catalyst is produced by reduction of nickel salts with sodium borohydride. [5] Trinickel boride can be obtained also by compressing nickel and boron powders with explosives. [6]
This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. ... Nickel: 8.912: 84 (2.327 ...
This page was last edited on 1 November 2023, at 00:49 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Catalysts for the reaction often include group 10 metals such as Raney nickel, [4] [5] [6] palladium black, or platinum dioxide. [1] However, other catalysts, such as cobalt boride, also can be regioselective for primary amine production: R-C≡N + 2 H 2 → R-CH 2 NH 2
Metallic nickel is precipitated by treating a solution of a nickel salt with an excess of zinc. [3] [1] This precipitated nickel contains relatively large amounts of zinc and zinc oxide. Then the catalyst is activated by digesting with either base or acid. There are different designations for differently prepared Urushibara nickel catalysts. [4]
[1] [2] They are used as a catalyst, as a building block in organic chemistry and in chemical vapor deposition. Organonickel compounds are also short-lived intermediates in organic reactions. The first organonickel compound was nickel tetracarbonyl Ni(CO) 4, reported in 1890 and quickly applied in the Mond process for nickel