Nickel system hydrogenation catalyst, preparation method and application

Abstract

The invention realtes to a nickel based hydrogenation catalyst, preparation and application thereof. Using alumina or and monox silica as carrier, the catalyst prepared by means of coprecipitation, main containing active component Ni, is characterized in catalyst composed by active component Ni, La, adjuvant X1 and carrier X2O. Calculated by weight of component, the catalyst including: NiO 40-70%, La2O3 2-5%, X2O 20-50%, wherein X1 is selected from one or more of Cu, Mg, Zr, X2 is selected from Al or and Si; surface area to volume ratio thereof is 80-200 m<2> / g, pore volume ratio is 0.4-0.8 ml / g. The catalyst is suit for mono olefin hydrogenation, especially for hydrogenation of pyrolysis C9 distillation, which has higher hydrogenation activity, definited sulfur poison resist and carboid resist to fit for higher require of high colloid raw material hydrogenation which of catalyst has high hydrogenation activity and good stability.

Description

technical field [0001] The invention relates to a nickel-based hydrogenation catalyst and its preparation method and application. The catalyst is suitable for the hydrogenation of monoolefins, especially for the cracking of C 9 Hydrogenation of distillates. Background technique [0002] Ethylene cracking fractions often contain a certain amount of inorganic sulfur and coke, causing catalyst poisoning and deactivation. In addition, heavier cracking fractions such as: cracking C 9 The depth of hydrogenation is not enough when precious metal catalysts are used for distillate hydrogenation, and the hydrogenation temperature is too high when molybdenum-nickel and cobalt-molybdenum catalysts are used, resulting in severe coking. For this reason, a new type of nickel-based catalyst with certain sulfur resistance, coke resistance and high hydrogenation performance has been developed, and it is used in the hydrogenation of medium and low cracking fractions. [0003] cleavage C 9 ...

AI Technical Summary

Problems solved by technology

However, these solvent oils have poor properties, deep color, and low economic value. After catalytic hydrogenation, the water-white hydrogenated product oil is obtained as solvent oil or gasoline blending oil.

[0004] U.S. Patent U.S.P 4956328 studies the mixed aqueous solution of nickel, aluminum and zirconium salts. Under the conditions of higher than 60°C and pH value of 7-10, the catalyst is prepared by co-precipitation with basic compounds and is suitable for aromatic hydrocarbons, nitrogen-containing hydrocarbons, and olefins. hydrogenation, the catalyst activity is not good

U.S.P 4307248 has studied the use of alumina and diatomaceous earth as the carrier, and the aqueous solution of the active component nickel and additives magnesium and copper are co-precipitated with basic compounds to prepare a catalyst suitable for the hydrogenation of aromatic hydrocarbons, nitrogen-containing hydrocarbons, and olefins , the catalyst has poor stability