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Preparation device and method of template agent for ammoximation catalyst

An ammoximation catalyst and preparation device technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of the influence of the ammoximation catalyst, the difficulty of controlling the content of non-skeleton titanium, and the ammoximation Problems such as poor catalyst activity and stability, to achieve the effect of increasing conversion rate and selectivity, enhancing market competitiveness, and high quality

Active Publication Date: 2020-05-22
CHINA TIANCHEN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the Ti-O bond is longer than the Si-O bond, it is difficult for titanium atoms to enter the framework, so the ammoximation catalyst synthesized by the current synthesis method will produce non-framework titanium, which will have a negative impact on the ammoximation catalyst.
Firstly, the non-skeleton titanium itself does not have catalytic oxidation activity, but it will cause a large amount of decomposition of hydrogen peroxide, which will lead to the reduction of the catalytic performance of the ammoximation catalyst; secondly, the content of the non-skeleton titanium is difficult to control, which leads to the degradation of the ammoximation catalyst. Poor activity and stability, which restricts the industrial application of ammoximation catalysts

Method used

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  • Preparation device and method of template agent for ammoximation catalyst
  • Preparation device and method of template agent for ammoximation catalyst
  • Preparation device and method of template agent for ammoximation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0058] A preparation device for a template of an ammoximation catalyst, comprising:

[0059] Reactor, used as a reaction vessel;

[0060] Filtration and washing equipment for filtering and washing the product derived from the reactor;

[0061] Reduced pressure drying equipment, used to receive and dry the filtered product;

[0062] Recovery and separation equipment, used to recover the raw material liquid and washing liquid obtained from the filter washing equipment and the washing liquid obtained from the vacuum drying equipment;

[0063] The batching tank is used to receive the dried product and prepare a solution using the dried product as a raw material;

[0064] Electrolysis equipment, used to electrolyze the prepared solution derived from the batching tank;

[0065] Concentrating equipment is used to receive and concentrate the lye after electrolysis.

[0066] Wherein, the lye after electrolysis is first contained in the lye tank, the volume of the lye tank is 30-60%...

Embodiment 2

[0082] On the basis of the above-mentioned embodiments, the filter washing equipment may include a vacuum belt filter and a spray mechanism, the spray mechanism is arranged directly above the vacuum belt filter, and the spray mechanism is used for filtering the vacuum belt filter The product on the medium is sprayed and washed, and the vacuum belt filter is equipped with a vacuum mechanism, which is used to suck away the liquid mixed in the product on the filter medium, so as to realize the separation of liquid and solid. Wherein, the spraying mechanism can adopt factory building spraying equipment commonly used in the prior art.

[0083] The recovery and separation equipment may include a mixed liquid tank for recovering liquid, a separator for separating the raw material liquid and washing liquid derived from the mixed liquid tank, a raw material liquid recovery tank for recovering the raw material liquid, and a raw material liquid recovery tank for recovering the washing liq...

Embodiment 3

[0089] On the basis of the above embodiments, the membrane reactor of the electrolysis equipment adopts 50-100 sets of cathode membranes, anode membranes and bipolar membranes, wherein the cation exchange membranes in the anode membranes and bipolar membranes are mainly made of sodium type or hydrogen type The positive membrane solution composed of sulfonated polyphenylene ether, small molecule alkoxysilane, polyvinyl alcohol, and solvent G is obtained after heat treatment; the anion exchange membrane in the cathode membrane and bipolar membrane is mainly made of bromine or alkali ammonium The negative film solution composed of polyphenylene ether, small molecule alkoxysilane, polyvinyl alcohol and solvent G is obtained after heat treatment. Wherein, the solvent G may be one or both of methanol, ethanol, N,N-dimethylacetamide or N,N-dimethylformamide.

[0090] A bipolar membrane is used in electrolysis, and one side is an anode membrane, and the other side is a cathode membran...

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Abstract

The invention provides a preparation device for a template of an ammoximation catalyst, comprising: a reaction kettle for use as a reaction vessel; a filtering and washing device for filtering and washing a product exported from the reaction kettle; a reduced pressure drying device for receiving and drying the filtered product; a recovery and separation device for recovering raw material liquid and washing liquid obtained from the filtering and washing device and the washing liquid obtained from the reduced pressure drying device; a batching kettle for receiving the dried product and preparinga solution from the product as a raw material; an electrolysis device for electrolyzing the prepared solution exported from the batching kettle; and a concentrating device for receiving and concentrating the lye after electrolysis. The template prepared by using the preparation device meets the requirements of an ammoximation catalyst production process, can provide a high-quality ammoximation catalyst, and increases the conversion rate and selectivity of the catalyst.

Description

technical field [0001] The invention belongs to the field of preparation of ammoximation catalysts, and in particular relates to a preparation device and method of a template agent of an ammoximation catalyst. Background technique [0002] The ammoximation catalyst is a new type of titanium-silicon molecular sieve with excellent directional oxidation catalytic performance formed by introducing the transition metal element titanium into the molecular sieve framework with MFI structure. It not only has the catalytic oxidation of titanium, but also has the shape-selective effect of MFI and excellent stability, has excellent oxidation and specific selectivity, and can be widely used in the oxidation of organic substances such as benzene, phenol, alcohols, ethers, etc. Reacting. At present, cyclohexanone ammoximation and propylene epoxidation have been industrialized. In addition, the green catalytic system composed of TS-1 titanium silicon molecular sieve and hydrogen peroxide ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/00C25B13/08B01J37/00
CPCB01J37/0018C25B3/00C25B13/08
Inventor 刘俊生宋辉张沫王元平张洪江刘明勤
Owner CHINA TIANCHEN ENG