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A kind of regeneration method of titanium silicon molecular sieve

A titanium-silicon molecular sieve and said technology are applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., which can solve the problems of high energy consumption and unsatisfactory regeneration effect, and achieve specific surface area recovery, activity and activity. Good stability and the effect of reducing pollution

Active Publication Date: 2016-08-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems are high energy consumption and unsatisfactory regeneration effect

Method used

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  • A kind of regeneration method of titanium silicon molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Under normal pressure at 90°C, dimethyl sulfoxide was mixed with the deactivated titanium-silicon molecular sieve (SH-2) of Comparative Example 4 and contacted for 5.5 hours, wherein the weight ratio of the deactivated titanium-silicon molecular sieve to dimethyl sulfoxide was 1: 10. After taking it out, wash it with an ammonia solution with a pH of 10 for 0.5 h under normal pressure at 90° C. to obtain the treated molecular sieve A.

Embodiment 2

[0049] At 80°C under normal pressure, dimethyl sulfoxide was mixed with the deactivated titanium-silicon molecular sieve (SH-3) of Comparative Example 5 and contacted for 7.5 hours, wherein the weight ratio of deactivated titanium-silicon molecular sieve to dimethyl sulfoxide was 1:5 . Then the molecular sieve was rinsed with an ammonia solution with a pH of 10 for 0.1 h under normal pressure at 80° C. to obtain the treated molecular sieve B.

Embodiment 3

[0051] Under normal pressure at 90°C, dimethyl sulfoxide was mixed with the deactivated titanium-silicon molecular sieve (SH-2) of Comparative Example 4 and contacted for 5.5 hours, wherein the weight ratio of the deactivated titanium-silicon molecular sieve to dimethyl sulfoxide was 1: 10. After taking it out, wash it with an ammonia solution with a pH of 10 for 0.5 h under normal pressure at 90° C., then take out the molecular sieve and dry it at 120° C. for 3 hours in an air atmosphere to obtain the treated molecular sieve C.

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Abstract

A kind of regeneration method of titanium silicon molecular sieve, it is characterized in that comprising will deactivated titanium silicon molecular sieve and be selected from dimethyl sulfoxide, sulfolane, N-methylpyrrolidone, N,N-dimethylformamide and N,N The step of contacting at least one compound in dimethylacetamide, and then mixing the contacted product with an alkaline solution, wherein said contacting temperature is lower than the boiling point temperature of said compound.

Description

technical field [0001] The invention relates to a regeneration method of a titanium silicon molecular sieve. Background technique [0002] Titanium-silicon molecular sieve is a new type of heteroatom molecular sieve developed in the early 1980s. TS-1 with MFI structure, TS-2 with MEL structure, and TS-48 with larger pore structure have been synthesized so far. This type of molecular sieve has excellent selective oxidation performance and high catalytic activity for many organic oxidation reactions, such as epoxidation of olefins, hydroxylation of aromatic hydrocarbons, oxidation of cyclohexanone, and oxidation of alcohols. They are used as redox molecular sieves The catalyst has a good application prospect. [0003] Among them, TS-1 molecular sieve is a new type of titanium-silicon molecular sieve with excellent catalytic selective oxidation performance formed by introducing transition metal element titanium into the molecular sieve framework with ZSM-5 structure. TS-1 no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/90
Inventor 林民史春风舒兴田朱斌
Owner CHINA PETROLEUM & CHEM CORP
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