Preparation method and application method of photo catalyst for high-efficiency photo-catalytic propylene epoxidation material

Abstract

The invention relates to a preparation method and an application method of a photo catalyst for a high-efficiency photo-catalytic propylene epoxidation material. The preparation method comprises the following processes: preparing a titanium silicon molecular sieve TS-1 carrier by adopting a hydrothermal method and directly supporting Au and Ag bimetals on the carrier by utilizing an impregnation-reduction method to prepare a bimetallic-supported Au-Ag / TS-1 photocatalyst. The prepared photocatalyst is put in a fixed bed reactor; propylene, oxygen and diluent gas are introduced; photo-catalytic reaction is performed by taking a 100W ultraviolet mercury lamp as a light source to prepare propylene epoxide PO. The propylene can be efficiently and highly-selectively converted into the propylene epoxide, and the optimal generation rate and the selectivity of the propylene epoxide are 68.3 mu mol.g<-1>h<-1> and 52.3 percent respectively. The preparation method and the application method provided by the invention have the advantages of being simple in process condition, low in cost, good in repeatability and friendly in environment in the reaction process and can convert the propylene into an industrial product with higher value added.

Description

technical field

[0001] The invention relates to the preparation and application of a high-efficiency photocatalytic propylene epoxidation material Au-Ag / TS-1. Under the excitation of ultraviolet light, the photocatalyst can efficiently catalyze the conversion of propylene into propylene oxide, which belongs to the photocatalytic epoxidation technology field. Background technique

[0002] Propylene oxide is an important organic chemical product, and it is also the third largest variety of propylene derivatives after polypropylene and acrylonitrile. It is also the main raw material of the fourth-generation detergent non-ionic surfactant, oil field demulsifier, pesticide emulsifier, etc. Propylene oxide derivatives are widely used in industries such as automobiles, construction, food, tobacco, medicine and cosmetics. Nearly 100 kinds of downstream products have been produced, which are important raw materials for fine chemical products. The main production processes of propy...