Acetylene catalytic hydrochlorination over powder catalyst prepared by pre-milling of K2PtCl4 salt

作者：Mitchenko Serge A; Krasnyakova Tatyana V; Mitchenko Regina S; Korduban Alexander N

来源：Journal of Molecular Catalysis A: Chemical , 2007, 275(1-2): 101-108.

DOI：10.1016/j.molcata.2007.05.036

• platinum(II) chloro complexes
• mechanoactivation
• acetylene
• hydrochlorination
• heterogeneous catalysis

Acetylene undergoes hydrochlorination by gaseous HCI in the absence of a solvent on the surface of pre-ground of K2PtC14 powder. In the DCI atmosphere, trans-D-vinyl chloride is formed. The catalytic reaction proceeds on the active sites, which are lattice defects in the form of rr-acetylene complexes generated by mechanical pre-activation of K(2)PtCl4 salt under acetylene. The limiting step of the reaction is acetylene chloroplatination. It involves a pi-acetylene complex and HCI molecule, producing a new pi-acetylene platinum(II) complex and intermediate beta-chlorovinyl Pt(II) derivative. The protonolysis of the latter species results in vinyl chloride formation.

• 出版日期2007-9-17