Titanium-silicon molecular sieve TS-1 catalyst for catalyzing ketone oximation reaction

Abstract

The invention relates to a titanium-silicon molecular sieve TS-1 catalyst for catalyzing ketone oximation reaction. In order to solve the problems of small particles, difficult separation and reutilization, high synthesis cost, strict and complex requirements in the process of gluing, poor repeatability and stability and the like in the prior art, the invention provides a new titanium-silicon molecular sieve TS-1 catalyst for the catalyzing ketone oximation reaction, which is prepared from the following steps: mixing the titanium-silicon molecular sieve TS-1 with one or more solutions of organic amine, ammonium salt, ammonia water and urea, carrying out crystallization again under the self-generating hydro-thermal pressure, and filtering, washing, drying and roasting to obtain the product. The prepared titanium-silicon molecular sieve TS-1 catalyst has large particles and easy separation and recovery after reaction, can improve the reutilization ratio, is especially suitable for ketone oximation reaction using hydrogen peroxide as an oxidizing agent, and can not produce byproducts, thereby protecting the environment and being beneficial to industrial application.

Description

technical field [0001] The invention relates to a titanium silicon molecular sieve TS-1 catalyst used for catalyzing the oximation reaction of ketones. Background technique [0002] Titanium-silicon molecular sieves had related patent reports as early as 1967, but they were not taken seriously because the author did not give sufficient data to characterize the crystal structure. Until the early 1980s, Italian Taramasso et al. patented GB207107A (1981) and USP4,410,501 ( 1983) publicly reported the synthesis of MFI-type structure TS-1 molecular sieve, followed by Ti-ZSM-11, Ti-Beta, Ti-MOR, Ti-ITQ-7 and Ti-MWW with microporous structure and mesoporous structure Ti-MCM-41, Ti-HMS, Ti-MSU and Ti-SBA-15, etc., this type of molecular sieve can selectively oxidize a variety of organic compounds, such as: olefin epoxidation, alcohol oxidation, alkane partial oxidation, phenol Hydroxylation, aromatic hydrocarbon epoxidation, ketone oximation, etc. In particular, titanium-silicon m...

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Problems solved by technology

[0018] In order to solve the problems in the prior art that the particles are small, difficult to separate and recycle, in addition, the synthesis cost is high, the glue making process requires strict and complex requirements, poor repeatability and stability, etc., the present invention provides a new catalyst for ketone Titanium-silicon molecular sieve TS-1 catalyst for oximation reaction, using cheap inorganic titanium source and inorganic silicon source hydrothermally synthesized titanium-silicon molecular sieve TS-1 raw powder, the synthesis process is simple, greatly reducing its production cost; the prepared titanium Silicon molecular sieve TS-1 catalyst has large particles (2um-10um), which is easy to separate and recover after reaction, and can increase the reuse rate; it is especially suitable for modifying the original powder of titanium silicon molecular sieve TS-1 after hydrothermal crystallization again It is suitable for the ammoximation reaction of ketones with hydrogen peroxide as the oxidant, without by-products, and is an environmentally friendly process, which is beneficial to industrial applications

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