Catalyst for preparing safrole

Abstract

The catalyst for preparing dihydrosafrole has skeleton copper carrying P and at least one co-catalyst selected from B, VIB, VIII and RE. The said technological scheme results in relatively high yield of dihydrosafrole product and less solvent consumption, so that the catalyst may be applied in the industrial preparation of dihydrosafrole.

Description

technical field [0001] The invention relates to a catalyst for preparing dihydrosafrole, in particular to a catalyst for preparing dihydrosafrole by hydrogenating safrole. Background technique [0002] Dihydrosafrole has the aroma of sassafras, which can be used in tobacco, washing products and cosmetics. Its other important use is as an intermediate of methylenedioxyphenyl pesticide synergists (such as piperonyl butoxide). body. The preparation method is to carry out catalytic hydrogenation to safrole, and then carry out chloromethylation and etherification reactions. There are many kinds of catalysts used in general hydrogenation: Pd / C, Rh / C, Rh / Al 2 o 3 and Raney Ni et al. In 1931, Japan’s Shozo T. etc. used reduced nickel powder to catalytic hydrogenation to obtain dihydrosafrole, but at 160-170°C and 0.6MPa, the yield was only 37%; B.B.Lurik of the former Soviet Union in 1965 Catalyzed hydrogenation with Raney Ni, the yield is 92%; "...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defects that the hydrogenation rate of the product dihydrosafrole is low in the process of preparing dihydrosafrole in the previous literature, the yield is low, and the amount of solvent consumed is large, providing A new catalyst for the preparation of dihydrosafrole