Patent · US Active

Modification method of titanium-silicalite zeolite based on the mixture of quaternary ammonium salt and inorganic alkali

US9486790B2 · kind B2 · utility

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9References

5Claims

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Assignee

Dalian University of Technology · CN

Inventors

Hongchen Guo · 东风镇, CN
Ji Su · Highland Park, US
Guanghong Liu · 东风镇, CN

Key dates

Filing date	Mar 18, 2012
Grant date	Nov 8, 2016
Priority date	—
Expiry date	Mar 31, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2229/38
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

This invention relates to a modification method for titanium-silicalite zeolite (TS-1). The feature of the invention is pretreating the TS-1, after that the TS-1 is modified by the mixture of quaternary ammonium salts and inorganic base. The quaternary ammonium salts mentioned above include tetrapropylammonium fluoride, tetrapropylammonium chloride, tetrapropylammonium iodide and their mixture. The inorganic base includes LiOH, NaOH and KOH and their mixtures. TS-1 after the modification is aftertreated at last. The invention is universal capable to modify the TS-1 synthesized by any method, especially the TS-1 made with a low cost method. The modification can enhance the catalytic performance on both gas and liquid phase epoxidation of propylene.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.