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The method for synthesizing 1,3-butadiene with bi/mo/co/ce/fe five-component composite oxide catalyst moving bed

A composite oxide and catalyst bed technology, applied in the field of chemical industry, to achieve high activity and selectivity

Active Publication Date: 2017-04-05
安徽工大化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of butadiene by simple extraction method is difficult to meet the needs of industry, and the use of C 4 The process route of distillate oxidative dehydrogenation to produce butadiene can alleviate the tension between supply and demand to a large extent, but in the traditional oxidative dehydrogenation reaction, a large amount of water is often introduced to inhibit the carbon deposition and deactivation of the catalyst

Method used

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  • The method for synthesizing 1,3-butadiene with bi/mo/co/ce/fe five-component composite oxide catalyst moving bed
  • The method for synthesizing 1,3-butadiene with bi/mo/co/ce/fe five-component composite oxide catalyst moving bed
  • The method for synthesizing 1,3-butadiene with bi/mo/co/ce/fe five-component composite oxide catalyst moving bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Catalyst preparation process

[0019] 9.7g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 50mL of 10% nitric acid solution, which was denoted as A solution, and 1.2g Co(NO 3 ) 2 ·6H 2 O, 0.9g Ce(NO 3 ) 3 ·6H 2 O and 2.4g Fe(NO 3 ) 3 9H 2 O was dissolved in 200mL deionized water, and this solution was recorded as solution B, and 3.53g (NH 4 ) 2 Mo 7 o 24 4H 2 O was dissolved in 200mL deionized water, and this solution was recorded as C solution, wherein the molar ratio of molybdenum to bismuth was 1:1, the molar ratio of cobalt to bismuth was 0.2:1, and the molar ratio of cerium to bismuth was 0.1:1, The molar ratio of iron to bismuth is 0.3:1. In a water bath at 60°C, add B dropwise to C and stir well. Add A dropwise to the above mixed solution, after fully stirring, dropwise add ammonia solution with a mass fraction of 25% in the mixed solution of five kinds of salts, adjust the pH value to 4, after the dropwise addition, continue to Stir in a water bath at 60°...

Embodiment 2

[0024] Catalyst preparation process

[0025] 9.7g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 50mL of 10% nitric acid solution, which was denoted as A solution, and 2.9g Co(NO 3 ) 2 ·6H 2 O, 3.5g Ce(NO 3 ) 3 ·6H 2 O and 4.8g Fe(NO 3 ) 3 9H 2 O was dissolved in 200mL deionized water, and this solution was recorded as solution B, and 3.53g (NH 4 ) 2 Mo 7 o 24 4H 2 O was dissolved in 200mL deionized water, and this solution was recorded as C solution, wherein the molar ratio of molybdenum to bismuth was 1:1, the molar ratio of cobalt to bismuth was 0.5:1, and the molar ratio of cerium to bismuth was 0.4:1, The molar ratio of iron to bismuth is 0.6:1. In a water bath at 80°C, add B dropwise to C and stir well. Add A dropwise to the above mixed solution, after fully stirring, dropwise add ammonia solution with a mass fraction of 25% in the mixed solution of five kinds of salts, adjust the pH value to 7, after the dropwise addition, continue to Stir in a water bath at 80°...

Embodiment 3

[0030] Catalyst preparation process

[0031] 9.7g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 50mL of 10% nitric acid solution, which was denoted as A solution, and 2.3g Co(NO 3 ) 2 ·6H 2 O, 2.6g Ce(NO 3 ) 3 ·6H 2 O and 4.0g Fe(NO 3 ) 3 9H 2 O was dissolved in 200mL deionized water, and this solution was recorded as solution B, and 3.53g (NH 4 ) 2 Mo 7 o 24 4H 2 O was dissolved in 200mL deionized water, and this solution was recorded as C solution, wherein the molar ratio of molybdenum to bismuth was 1:1, the molar ratio of cobalt to bismuth was 0.4:1, and the molar ratio of cerium to bismuth was 0.3:1, The molar ratio of iron to bismuth is 0.5:1. In a water bath at 70°C, add B dropwise to C and stir well. Add A dropwise to the above mixed solution, after fully stirring, dropwise add ammonia solution with a mass fraction of 25% in the mixed solution of five kinds of salts, adjust the pH value to 6, after the dropwise addition, continue to Stir in a water bath at 70°...

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Abstract

The invention discloses a method for synthesizing 1,3-butadiene by using a Bi / Mo / Co / Ce / Fe five-component composite oxide catalyst moving bed, belonging to the technical field of chemical industry. The method comprises the following steps: putting a prepared five-element composite oxide catalyst in a moving bed reactor, introducing a gas mixture into the reactor, and reacting while keeping certain air speed and catalyst bed layer temperature to obtain the 1,3-butadiene product, wherein the reaction catalyst gradually moves to the regeneration reactor, and a fresh catalyst is supplemented into the moving bed reactor. The five-component composite oxide catalyst is prepared by the following steps: mixing Bi, Mo, Co, Ce, Fe and deionized water according to a certain mole ratio, regulating the pH value with alkali liquor, concentrating, filtering, drying, roasting, cooling, grinding and screening to obtain the Bi / Mo / Co / Ce / Fe. Compared with the traditional technique, the method is characterized in that the high-activity high-selectivity five-element composite oxide catalyst for the 1,3-butadiene preparation technique can be prepared by regulating the contents of the metals Co, Ce and Fe in the catalyst.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a method for synthesizing 1,3-butadiene with a Bi / Mo / Co / Ce / Fe five-component composite oxide catalyst moving bed. Background technique [0002] 1,3-butadiene is one of the basic raw materials of petrochemical industry, and its position in petrochemical olefin raw materials is second only to ethylene and propylene. It is mainly used as a general raw material for the production of various synthetic rubbers, polymer resins and chemical intermediates. Among them, the largest use of butadiene is the production of styrene butadiene rubber and polybutadiene rubber, which are mainly used in tire products. At present, there are mainly two methods for the industrial production of butadiene, one is from steam cracking and catalytic cracking by-product C 4 Butadiene is extracted from the middle; the other mainly uses C 4 Oxidative dehydrogenation of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/48C07C11/167B01J23/887
Inventor 万超许立信金波雷昭郑明东
Owner 安徽工大化工科技有限公司