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Catalyst used in ammoxidation of methanol for preparation of hydrocyanic acid, and application thereof

A catalyst, hydrogen cyanide technology, applied in physical/chemical process catalysts, molecular sieve catalysts, preparation/purification/separation of hydrogen cyanide, etc., can solve the problems of poor selectivity of hydrogen cyanide, low space-time yield, etc., to achieve repeatable Good performance, improved selectivity and space-time yield

Inactive Publication Date: 2016-07-20
CHIA TAI ENERGY MATERIALS DALIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention mainly aims at the problems of poor selectivity of hydrocyanic acid and low space-time yield in the existing patents, and provides a high-efficiency catalyst for preparing hydrocyanic acid by ammoxidation of methanol with good selectivity of hydrocyanic acid and high space-time yield

Method used

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  • Catalyst used in ammoxidation of methanol for preparation of hydrocyanic acid, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 7.4g (NH 4 ) 6 Mo 7 o 24 4H 2 O, 1.2gNH 4 VO 3 and 1.6gSb 2 o 3 Put it into a 250mL beaker, add 80mL deionized water, heat and stir to form a blue suspension, which is slurry-A.

[0045] 1.4 g Nb 2 o 5 ·xH 2 O and 1.4g oxalic acid were heated and dissolved in 20mL deionized water, and after cooling down to room temperature, 0.9gH 2 o 2 , and then add 6 mL of 1 mg / mL chromium nitrate solution and 1 mL of 1 mg / mL silver nitrate solution, and stir at room temperature for 10 min to obtain slurry-B.

[0046] Put 4.47g of white carbon black into a 250mL beaker, add 60mL of deionized water to ultrasonically disperse to form a dispersion liquid, which is slurry-C.

[0047] Add 8.8g of silica sol (SiO 2 Mass fraction 30%) and 1.9gH 2 o 2 , stirred for 1 h, added slurry-B and slurry-C and stirred for 10 min, put the resulting slurry into a circular evaporating flask, vacuum-distilled until semi-dry, and dried in an oven.

[0048] The dried solid was granulated in...

Embodiment 2～14

[0050] According to the same preparation process as in Example 1, the desired catalyst was prepared according to the composition of the catalyst in Table 1.

[0051] The difference in the preparation process is that the partially implemented carrier uses H-ZSM-5, SAPO-34, α-Al 2 o 3 Instead of white carbon black, the active component raw material metal cations used are different, and the proportion of the raw materials varies with the composition of the catalyst.

[0052] The obtained catalyst was investigated according to the above-mentioned investigation and evaluation conditions, and the initial activity results are shown in Table 2.

[0053] Table 1 Catalyst Composition

[0054]

Catalyst composition

Example 1

Mo 1 V 0.24 Sb 0.26 Nb 0.18 On / 44%-SiO2 2

Example 2

Mo 1 V 0.24 Sb 0.26 Nb 0.09 On / 44%-SiO2 2

Example 3

Mo 1 V 0.24 Sb 0.26 Nb 0.09 Cr 0.0002 On / 44%-SiO2 2

Example 4

Mo 1 V...

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PUM

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Abstract

The invention discloses a catalyst used in ammoxidation of methanol for preparation of hydrocyanic acid. The invention mainly aims to overcome the problems of poor selectivity and low space time yield of hydrocyanic acid in the prior art. According to the invention, certain active components are loaded on a certain carrier, and active components included in the catalyst is as shown in the general formula of Mo<1>VSbNb<c>M<d>O<n>, wherein M is one selected from a group consisting of Cr, Ce, W, Mn and Fe. When applied to ammoxidation of methanol, the prepared catalyst obviously improves selectivity and low space time yield of hydrocyanic acid; and the catalyst has good synthesis repeatability.

Description

technical field [0001] The invention relates to a catalyst for producing hydrocyanic acid by ammoxidation of methanol. Background technique [0002] Hydrocyanic acid, also known as hydrogen cyanide, is a highly toxic chemical, but it is widely used in the manufacture of nylon, pesticides, metal plating, gold and silver mining, pharmaceuticals, rodenticide, organic synthesis , plasma etching, etc., especially the rapid development of downstream industries such as hexanediol and methacrylate resin, has promoted the market demand for hydrocyanic acid. At present, there are four main production processes of hydrocyanic acid: Angle's method, BMA method, acrylonitrile by-product method and light oil cracking method. The Angle's method and light oil cracking method are usually used in China. Acrylonitrile by-product method Due to the improvement of acrylonitrile synthesis technology, the by-product hydrocyanic acid is significantly reduced, which can no longer meet the needs of fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J29/48B01J29/85C01C3/02
Inventor 邓忠华吴宗斌刘禹李秀清徐燕任佳
Owner CHIA TAI ENERGY MATERIALS DALIAN