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Silica-alumina molecular sieve, its preparation method and application, and a method for converting cyclic ketones

A silicon-alumina molecular sieve and cyclic ketone technology, which is applied in the application of silicon-aluminum molecular sieve, cyclic ketone conversion, and preparation of silicon-alumina molecular sieve, can solve the problems of occupying land resources and inventory space, and achieve good catalytic effect.

Active Publication Date: 2018-09-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Silica-alumina molecular sieve, its preparation method and application, and a method for converting cyclic ketones
  • Silica-alumina molecular sieve, its preparation method and application, and a method for converting cyclic ketones
  • Silica-alumina molecular sieve, its preparation method and application, and a method for converting cyclic ketones

Examples

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preparation example Construction

[0027] Therefore, as previously mentioned, the present invention provides a kind of preparation method of silica-alumina molecular sieve of the present invention, and this method comprises:

[0028] (1) Mix the unloading agent with the acid solution for beating, carry out the first heat treatment to the obtained slurry, and separate and obtain the first solid, wherein the unloading agent is the unloading agent of the reaction device using titanium silicon molecular sieve as the catalyst active component. Dispensing;

[0029] (2) Mixing the aluminum source and the alkali source in the presence of an aqueous solvent to obtain a mixed solution, and performing a second heat treatment after mixing the mixed solution with the first solid.

[0030]In the present invention, the unloading agent of the reaction device using titanium-silicon molecular sieve as the catalyst active component can be the unloading agent from various devices that use titanium-silicon molecular sieve as the ca...

Embodiment 1

[0107] This example illustrates the methods and products provided by the invention.

[0108] 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 Mix and beat the aqueous solution, then mix and stir the mixed slurry at 80°C for 12 hours; obtain a solid after solid-liquid separation, mix the aluminum source aluminum sulfate and sodium hydroxide aqueous solution (pH 12) to obtain a mixed solution, and mix the solid and mixed solution After mixing, put it into a stainless steel sealed reaction kettle, and treat it at 170°C for 12 hours, wherein, the mass composition of the material is an inactivated cyclohexanone oximation catalyst: aluminum source: acid: alkali: water = 100: 1: 10: 5: 250 , deactivated cyclohexanone oximation catalyst with SiO 2 In terms of a...

Embodiment 2

[0116] This example illustrates the methods and products provided by the invention.

[0117] 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; obtain solid after solid-liquid separation, Mix the aluminum source aluminum sol (content: 20% by weight) and tetrapropylammonium hydroxide aqueous solution (pH: 10) to obtain a mixed solution, mix the solid and the mixed solution, put them into a stainless steel sealed reaction kettle, and treat at 150°C for 12 hours , wherein the quality of the material is composed of deactivated cyclohexanone oximation catalyst: aluminum source: acid: alkali: water=100:0.5:15:15:200, and the deactivated cyclohexanone oximation catalyst is SiO 2 In terms of acid, H + In terms of alkali in OH - count. Then the product was recovered according to the method of Example 1 to obtain a silica-alumina ...

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Abstract

The invention provides a silicon-aluminum molecular sieve, a preparation method and applications thereof. The silicon-aluminum molecular sieve comprises an aluminum element, a silicon element, and an oxygen element. The pore volume of the silicon-aluminum molecular sieve is 0.3 cm3 / g or more. The total specific surface area is 200 m2 / g or more, the external surface area is 30 m2 / g or more, and the external surface area accounts for 10 to 55% of the total specific surface area. The benzene absorption amount is at least 65 mg for each gram of molecular sieve under following conditions: temperature: 25 DEG C, P / P0=0.10, and absorption time: 1 hour. Under N2 static absorption tests, the micro pore size distribution is in a range of 0.9 to 2.0 nm. The invention provides a cyclic ketone conversion method. The provided molecular sieve containing precious metals has a special physico-chemical structure, the benzene absorption amount is high, and the micro pore size distribution is in a range of 0.9 to 2.0 nm. The molecular sieve can achieve a better catalytic effect, when being applied to reactions that generate circular molecules (especially cyclic ketone molecules) or reactions that circular molecules (especially cyclic ketone molecules) participate in.

Description

technical field [0001] The invention relates to a silica-alumina molecular sieve and a preparation method of the silica-alumina molecular sieve, and also relates to the application of the silica-alumina molecular sieve and a method for converting cyclic ketones. 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 successfully realized industrial application in the process of preparing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/04
Inventor 林民史春风朱斌
Owner CHINA PETROLEUM & CHEM CORP