Method for preparing titanium-containing molecular sieve

Abstract

The invention is a Ti-containing molecular sieve, namely TS-1 molecular sieve preparing method, belonging to inorganic chemical synthesis technical field. Multiple Si-Al molecular sieves have been successfully synthesized by the existing dry glue process, such as ZSM-5, FER, MOR, CHA, ZSM-48 and other zeolite molecular sieves, and Ti-Beta and Ti-MWW molecular sieves. And the preparing method synthesizes TS-1 molecular sieve by dry glue process, firstly hydrolyzing TBOT in a template TPAOH, then adding in inorganic silicon sources to form uniform gel, heating and evaporating the gel to dryness and obtaining dry glue, and finally transferring the dry glue into a crystallizing kettle with water jacket isolation layer for crystallization, and obtaining the TS-1 molecular sieve by routine filtering, washing, drying and baking processes. And the TS-1 molecular sieve product has high activity and high yield.

Description

technical field [0001] The invention relates to a method for preparing a titanium-containing molecular sieve, in particular to a method for preparing a TS-1 molecular sieve, and belongs to the technical field of inorganic chemical synthesis. Background technique [0002] TS-1 molecular sieve is a heteroatom molecular sieve with MFI structure and titanium atoms in the framework. Since it was first reported by Taramasso et al. Research hotspots in the field of catalysis. [0003] At present, the classic method for the synthesis of TS-1 molecular sieve is to use organic silicon ester and organic titanium ester as the silicon source and titanium source respectively, and use tetrapropyl ammonium hydroxide (TPAOH) as the templating agent under certain temperature and pressure. Hydrothermal synthesis. Such as the synthetic method disclosed in GB207071A, US 4,410,501 and the improved synthetic method reported by Thangaraj et al. that can effectively increase ...

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Problems solved by technology

However, in the above classical hydrothermal synthesis method, since silicon ester and titanium ester need to be hydrolyzed, there is an alcohol catching process, and the amount of template agent TPAOH is large, according to the molar ratio template agent TPAOH:SiO 2 It is (0.4~1.0): 1 (US 4,410,501), so the production operation process is complicated and the cost is high

However, there is no report on the synthesis of TS-1 molecular sieves by dry gel method

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