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Catalyst used for methanol ammoxidation and preparation and forming method thereof

A technology of oxidation reaction and molding method, which is applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. problems such as poor particle size controllability and poor particle size control, to achieve the effect of good popularization and application value, controllable morphology and size, and convenient preparation

Inactive Publication Date: 2017-05-17
HUAYANG NEW MATERIAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of preparation of hydrogen cyanide catalyst by methanol ammoxidation, aiming at defects such as complex preparation of metal composite catalyst, poor controllability of particle size, uneven activity distribution, poor applicability to fixed bed reactor, etc., to provide a Simple catalyst preparation and molding method to produce a catalyst with stable performance, high activity and suitable for industrial applications

Method used

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  • Catalyst used for methanol ammoxidation and preparation and forming method thereof

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Effect test

Embodiment 1

[0029] A catalyst for methanol ammoxidation, the chemical composition of the active ingredient of the catalyst is Fe a MoO b , where a=0.5, its preparation method is as follows:

[0030] (1) Dissolve 12.35g of ammonium molybdate tetrahydrate powder in 40g of deionized water and 7g of ammonia water with a mass fraction of 25%, stir for 10 minutes and dissolve to form an ammonium molybdate solution. 14.14 g of ferric nitrate nonahydrate were dissolved in 20 g of deionized water. Under rapid stirring, the ammonium molybdate solution is slowly added dropwise to the ferric nitrate solution, and the drop rate is controlled to complete the dropwise addition within 0.5 to 1 hour. After the dropwise addition, the pH was adjusted to 2.5 with ammonia water. Then raise the temperature to 100°C and heat to reflux for 2 to 3 hours. The temperature was then lowered to 80° C., and stirring was stopped overnight.

[0031] (2) Slowly add 40g of acidic silica sol with a mass fraction of 30%...

Embodiment 2

[0034] A catalyst for methanol ammoxidation, the chemical composition of the active ingredient of the catalyst is Fe a MoO b , where a=1, its preparation method is as follows:

[0035] (1) Dissolve 12.35g of ammonium molybdate tetrahydrate powder in 40g of deionized water and 7g of ammonia water with a mass fraction of 25%, stir for 10 minutes and dissolve to form an ammonium molybdate solution. 28.28 g of ferric nitrate nonahydrate were dissolved in 30 g of deionized water. Under rapid stirring, the ammonium molybdate solution is slowly added dropwise to the ferric nitrate solution, and the drop rate is controlled to complete the dropwise addition within 0.5 to 1 hour. After the dropwise addition, the pH was adjusted to 2.5 with ammonia water. Then raise the temperature to 100°C and heat to reflux for 2 to 3 hours. The temperature was then lowered to 80° C., and stirring was stopped overnight.

[0036] (2) Slowly add 50g of acidic silica sol with a mass fraction of 30% d...

Embodiment 3

[0039] A catalyst for methanol ammoxidation, the chemical composition of the active ingredient of the catalyst is Fe a MoO b , where a=1.5, its preparation method is as follows:

[0040] (1) Dissolve 12.35g of ammonium molybdate tetrahydrate powder in 40g of deionized water and 7g of ammonia water with a mass fraction of 25%, stir for 10 minutes and dissolve to form an ammonium molybdate solution. 42.42 g of ferric nitrate nonahydrate were dissolved in 45 g of deionized water. Under rapid stirring, the ammonium molybdate solution is slowly added dropwise to the ferric nitrate solution, and the drop rate is controlled to complete the dropwise addition within 0.5 to 1 hour. After the dropwise addition, the pH was adjusted to 2.5 with ammonia water. Then raise the temperature to 100°C and heat to reflux for 2 to 3 hours. The temperature was then lowered to 80° C., and stirring was stopped overnight.

[0041] (2) Slowly add 60g of acidic silica sol with a mass fraction of 30%...

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Abstract

The invention provides a preparation and forming method of a catalyst used for preparation of hydrogen cyanide through methanol ammoxidation. An existing catalyst used for preparation of hydrogen cyanide through methanol ammoxidation is mostly complex in composition, a preparation process is more difficult to control, and the applicabilityin an industrial fixed bed reactor is poor. The catalyst provided by the invention mainly comprises Fe-Mo metal oxide, wherein the atomic ratio of Fe to Mo is 0.5-5, and main ingredients of the catalyst are Fe2(MoO4)3 and Fe2O3, wherein Fe2(MoO4)3 has an ammoxidation catalysis effect, and Fe2O3 has a co-catalysis effect. The formed catalyst is controllable in particle size, has better activity and stability, and can be used for fixed bed reactors in various scales.

Description

technical field [0001] The invention belongs to the field of industrial molding catalyst preparation, and specifically adopts a sol-gel co-precipitation method and an extrusion molding method to prepare an industrial catalyst for methanol ammoxidation. Background technique [0002] Hydrogen cyanide is an important chemical raw material, which can be used to produce adiponitrile, methionine, glycine, glyphosate, methyl methacrylate and sodium cyanide, etc. It is used in various industries such as pesticides, medicine, dyes, metallurgy and electroplating. are widely used. [0003] The industrial production methods of hydrogen cyanide mainly include methane ammoxidation method, acrylonitrile by-product method and light oil cracking method. The methane ammoxidation method uses methane, ammonia and oxygen as raw materials, platinum and rhodium alloys as catalysts, and reacts at a high temperature above 1000 ° C to generate hydrogen cyanide. This method was industrialized in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/881C01C3/02
CPCB01J23/881C01C3/0241
Inventor 童明全李超琚裕波潘蓉李健郭琳韩艳辉袁秋华冯志武
Owner HUAYANG NEW MATERIAL TECH GRP CO LTD
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