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Acrylic acid catalyst and preparation method thereof

A catalyst and acrylic acid technology, which is applied in the preparation of carboxylate, chemical instruments and methods, and the preparation of organic compounds, etc., can solve problems such as complex systems, and achieve the effect of simple process flow and increased yield of acrylic acid

Active Publication Date: 2016-02-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is the complex system problem caused by the use of two-stage catalysts in the existing propylene oxidation to acrylic acid catalysts. A preparation method for the preparation of acrylic acid catalysts in the selective oxidation of propylene is provided. The catalyst obtained by the method can be obtained by acrylic acid after one reactor

Method used

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  • Acrylic acid catalyst and preparation method thereof
  • Acrylic acid catalyst and preparation method thereof
  • Acrylic acid catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Catalyst preparation

[0038] (1) Preparation of catalyst precursor 1

[0039] 1000 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 1000 grams of water, and 800 grams of silica sol with a concentration of 40 wt% was added to prepare material 1.

[0040] 397 g Fe(NO 3 ) 3 9H 2 O, 275 grams of Bi(NO 3 ) 3 ·5H 2 O, 495 g Co(NO 3 ) 2 ·6H 2 O, 452 grams of Ni (NO 3 ) 2 ·6H 2 O, 42 g Mn(NO 3 ) 2 , 20g La(NO 3 ) 3 ·3H 2 O. 2.9 g KNO 3 and 5.5 grams of CsNO 3 Material 2 was made by dissolving in 212 grams of water.

[0041] Material 2 was added dropwise to material 1 under rapid stirring to form catalyst slurry 1, and after stirring and aging at 80°C for 2 hours, the slurry was sprayed and formed. The conditions for spray forming were: air inlet temperature 340°C, outlet temperature The tuyere temperature was 125°C; the rotation speed of the atomizing disc was 14,000 rpm, and the slurry was sprayed and calcined at 500°C for 90 minutes to obtain the c...

Embodiment 2-11

[0061] 1. Catalyst preparation

[0062] (1) Preparation of catalyst precursor 1

[0063] Preparation material 1 and material 2 were prepared according to the same steps as in Example 1, and the composition of catalyst precursor 1 is listed in Table 1. The raw materials required for the preparation of material 1 are ammonium heptamolybdate, 40% silica sol and 20% aluminum sol; the raw materials required for the preparation of material 2 are antimony trioxide, and metal nitrates are used for the rest of the components.

[0064] (2) Preparation of catalyst precursor 2

[0065] Preparation material 3 and material 4 were prepared according to the same steps as in Example 1, and the composition of catalyst precursor 2 is listed in Table 2. The raw materials required for the preparation of material 1 are ammonium heptamolybdate, ammonium metavanadate, 40% silica sol, 20% aluminum sol and titanium sulfate; the raw materials required for the preparation of material 2 are ammonium t...

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Abstract

The present invention relates to a method for preparing a catalyst for synthesizing acrylic acid, a catalyst obtained by the method, and a method for synthesizing acrylic acid using the catalyst. It mainly solves the problem of system complexity caused by two-stage catalysts in the prior art. Include the following components in weight percent: 40-60% catalyst precursor 1; 30-50% catalyst precursor 2; 5-15% binding agent, binding agent is SiO2 and / or Al2O3; Catalyst precursor I and catalyst precursor II are mixed with the binder and molded, wherein the catalyst precursor 1 is a catalyst for the preparation of acrolein by oxidizing propylene, and wherein the catalyst precursor 2 is a technical scheme for preparing acrylic acid catalyst by oxidation of acrolein, preferably This technical problem is solved effectively, and it can be used in the industrial production of synthetic acrylic acid catalyst.

Description

technical field [0001] The invention relates to a catalyst for synthesizing acrylic acid and a preparation method of the catalyst. Background technique [0002] The selective oxidation of olefins to prepare α, β unsaturated acids is an important chemical process. In industry, olefins are usually oxidized first to obtain unsaturated aldehydes, and then unsaturated aldehydes are oxidized to obtain unsaturated acids. Since the process is produced in two stages, two reactors and two catalysts are used to complete under different reaction conditions, so the device is complicated and the operation is difficult. The active component of the catalyst in the first stage is Mo and Bi composite oxide. The improvement of the catalyst is mainly carried out in terms of the activity and stability of the catalyst, such as adding transition metals to the active component to increase the activity and increase the yield of the product; adding rare earth elements to improve the redox ability; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J23/888B01J23/887C07C57/05C07C51/25
Inventor 杨斌缪晓春汪国军徐文杰奚美珍
Owner CHINA PETROLEUM & CHEM CORP