Supported quaternary phosphonium catalyst, preparation and use thereof

摘要

This invention relates to a supported quaternary phosphonium catalyst, preparation thereof and use thereof in producing dialkyl carbonates. The supported quaternary phosphonium catalyst of this invention has the following average molecular structure (I), and is characterized by a relatively high and stable catalyst activity.;
wherein, each of X, L, n, R1, R2, R3 and
;
is the same as that in the specification.

主权项

1. A process for producing a supported quaternary phosphonium catalyst, comprising a step of reacting a tertiary phosphine of the following formula (2) with a macromolecular agent of the following formula (3), wherein the ratio by weight of the tertiary phosphine to the macromolecular agent is 1 to 20 : 80 to 99, wherein R1, R2 and R3 are different from or identical to each other, and are each independently selected from the group consisting of a C6-20 aryl, or a C6-20 aryl substituted by one or more C1-6 straight-chain or branched alkyl or C2-6 straight-chain or branched alkenyl, represents a covalent bond, wherein X is a halogen atom, L is a bivalent bonding group,  is one or more carrier selected from the group consisting of silica, zeolite, and kieselguhr, represents a covalent bond, and wherein the reaction temperature is 100 to 190 ° C., and the reaction duration is 10 to 40 h.