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Tin-titanium-silicon molecular sieve, preparation method and application thereof, and sulfide oxidation method

A technology of tin-titanium-silicon molecular sieve and titanium-silicon molecular sieve is applied in the field of sulfide oxidation, which can solve the problems of occupying land resources and inventory space, and achieve the effects of modulation selectivity and good catalytic effect.

Active Publication Date: 2021-03-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, valuable land resources and storage space are taken up, and the recovery and utilization technology development of deactivated ammoximation catalysts is urgently needed

Method used

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  • Tin-titanium-silicon molecular sieve, preparation method and application thereof, and sulfide oxidation method
  • Tin-titanium-silicon molecular sieve, preparation method and application thereof, and sulfide oxidation method
  • Tin-titanium-silicon molecular sieve, preparation method and application thereof, and sulfide oxidation method

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Embodiment approach

[0028] According to a preferred embodiment of the present invention, the molecular sieve satisfies nSn / nTi=A, I 960 / I 800 =B, B=i(A+1)nTi, wherein 0.1960 Infrared absorption spectrum of molecular sieve at 960cm -1 Absorption intensity in the vicinity, I 800 Infrared absorption spectrum of molecular sieve at 800cm -1 Absorption strength in the vicinity. Preferably, 0.2<A<3, 0.3<B<0.7. In this way, it can be more conducive to the diffusion of reactants and product molecules in the catalytic oxidation reaction, not only can further improve the conversion rate of thioether, but also can more effectively adjust the selectivity of the target product. For example, when used in the oxidation reaction of thioether, the conversion rate of thioether can be further improved, and the selectivity of the target product sulfone can be more effectively adjusted.

[0029] According to the molecular sieve of the present invention, preferably the molecular sieve satisfies T w / T k =D, 0.2...

Embodiment 1

[0119] This example illustrates the methods and products provided by the invention.

[0120] At normal temperature (20°C, the rest of the comparative examples are the same as the examples) and normal pressure (0.1MPa, the rest of the comparative examples are the same as the examples), the deactivated cyclohexanone oximation catalyst SH-2 and 1mol / L hydrochloric acid The aqueous solution was mixed and beaten, and then the mixed slurry was mixed and stirred at 80°C for 12 hours; after solid-liquid separation, the solid, tin source tin chloride pentahydrate, organosilicon source tetraethyl orthosilicate, and sodium hydroxide aqueous solution (pH 12 ) mixed, and after tetraethyl orthosilicate was hydrolyzed (the hydrolysis rate of the organic silicon source was 40%), the mixture was transferred to a stainless steel sealed reaction kettle, treated at 100°C for 10h, and then at 170°C for 12h, wherein, inactivation Cyclohexanone oximation catalyst: tin source: organosilicon source: a...

Embodiment 2

[0122] This example illustrates the methods and products provided by the invention.

[0123] At normal temperature and pressure, first mix the deactivated cyclohexanone oximation catalyst SH-3 with 5mol / L hydrochloric acid solution for beating, then mix and stir the mixed slurry at 60°C for 1 hour; after solid-liquid separation, separate the solid, Tin source tin chloride pentahydrate, organosilicon source methyl orthosilicate and tetrapropyl ammonium hydroxide aqueous solution (pH is 10) are mixed, treat that orthosilicate methyl ester is hydrolyzed (organosilicon source hydrolysis rate is 50%) The mixture was transferred to a stainless steel sealed reactor, treated at 130°C for 4h, and then at 150°C for 20h, wherein the molar ratio of deactivated cyclohexanone oximation catalyst: tin source: organosilicon source: acid: alkali: water 100:2:1:15:15:200, deactivated cyclohexanone oximation catalyst and organosilicon source with SiO 2 In terms of acid, H + In terms of base, in...

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Abstract

The present invention involves the field of molecular screens, and a tin titanium silicon molecular sieve and its preparation methods and applications and sulfation oxidation methods are disclosed. 1‑1.8 / X 0.4‑0.9 = C, 0.3 <c <0.85, x 0.4‑0.9 It is the proportion of micro -hole diameter in the range of molecular sieves in the range of 0.4筛0.9nm. 1‑1.8 It is the proportion of micro -hole diameter in the range of a molecular sieve in the range of micropores in the range of 181.8nm.This method includes: mix the catalyst containing titanium silicon molecules with acid solution to obtain a mixture A, and the mixture A is used for the first heat treatment to obtain the first solid;Perform the second heat treatment.The tin titanium silicon molecular sieve provided by the present invention has a special materialized characteristic structure and is used to oxidize the sulfur ether oxidation, which is conducive to the selectivity of the target product.

Description

technical field [0001] The invention relates to the field of molecular sieves, in particular to a tin-titanium-silicon molecular sieve, a preparation method of the tin-titanium-silicon molecular sieve, an application of the tin-titanium-silicon molecular sieve in a thioether oxidation reaction and a thioether oxidation method. Background technique [0002] Titanium-silicon molecular sieve is a molecular sieve whose skeleton is composed of silicon, titanium and oxygen elements. It has broad application prospects in petroleum refining and petrochemical industry. 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. [0003] TS-1 not only has the catalytic oxidation of titanium, but also has the shape-selective effect and excellent stability of ZSM-5 molecular sieve, and has success...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/08B01J29/89B01J29/04C07C315/02C07C317/04C07C317/14
CPCB01J29/04B01J29/89C01B39/08C01B39/085C07C315/02C07C317/04C07C317/14
Inventor 史春风林民
Owner CHINA PETROLEUM & CHEM CORP
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