Beijing University of Chemical Tehcnology

Yufei He

Dianqing Li

Junting Feng

Rui Ma

Yanan Liu

Yongjun Feng

Fengzhi Fu

Cu/MMgOinterfacial catalyst for selective alkyne hydrogenation and its preparation method are disclosed. The preparation method of the catalyst includes: the mixture of salt and alkali solution is nucleated momentarily by nucleation/crystallization isolation method, preparing the composite metal hydroxide CuMMg-LDHs as precursor, which has typical hexagonal morphology of the double hydroxide; the precursor is topologically transformed by heat treatment to produce unsaturated oxide; the catalyst with Cu-MMgOinterface structure is prepared by separating and electronically modifying Cu particles. By adjusting the ratio of Cu/Min LDHs, the electronic and geometric structure of Cu-MMgOinterface can be flexibly controlled, thus enhancing the reaction activity, product selectivity and stability. The catalyst can be used in the selective hydrogenation of various alkynes in the fields of petrochemical and fine chemical industry, with the outstanding catalytic activity and C&#x2550;C double bond selectivity. The catalyst also has good reusability.

Cu/MMgOinterfacial catalyst for selective alkyne hydrogenation and its preparation method

The purpose of the invention is to provide a supported bimetallic core-shell structure catalyst and its preparation method. Supporter, metal salt and reducing agent solution are mixed to synthesize the catalyst M@PdM/ZT by using a one-step synthesis method, wherein the active metal particle M@PdM as core-shell structure, M Is the core representing one of the Ag, Pt, Au and Ir. ZT is the supporter, representing one of hydrotalcite (MgAl-LDH), alumina (AlO) and silica (SiO). By changing the temperature and the reaction time to control the kinetic behavior of the reduction of two kinds of metal ions to realize the construction of core-shell structure. Active metal particle composition and shell thickness are regulated by controlling metal ion concentration. The bimetallic core-shell catalyst prepared by this method showed excellent selectivity and stability in acetylene selective hydrogenation and anthraquinone hydrogenation.

Supported bimetallic core-shell structure catalyst and its preparation method

Growing community of inventors

Beijing, China

Yufei He