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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, and can solve the problems of low yield of acrylic acid and low conversion rate of acrolein

Active Publication Date: 2017-02-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the problems of low conversion rate of acrolein and low yield of acrylic acid existing in the reaction of acrolein oxidation to produce acrylic acid in the prior art, providing a catalyst for the synthesis of acrylic acid

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

[0049] 200 grams of ammonium heptamolybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O), 32.9 grams of ammonium metavanadate (NH 4 VO 3 ), 5.9 grams of copper oxide (CuO), 48.4 grams of ammonium tungstate ((NH 4 ) 5 h 5 [H 2 (WO 4 ) 6 ]·H 2 O), 6.9 grams of antimony trioxide (Sb 2 o 3 ), 3.7 grams of iron oxide (Fe 2 o 3 ) and 0.64 grams of potassium hydroxide (KOH), 10 grams of methylcellulose (weight average molecular weight 20000), 230 grams of carrier SiO 2 1. Dry mix 25 grams of kaolin in a kneader for 1 hour, then add 15 grams of nitric acid and 100 grams of deionized water into the powder, and continue kneading for 1 hour. Raschig rings with an outer diameter of 5 mm, an inner diameter of 1.5 mm and a length of 5 mm were obtained, and then calcined for 2 hours to obtain a finished catalyst at a calcining temperature of 500° C.

Embodiment 2

[0051] 200 grams of ammonium heptamolybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O), 32.9 grams of ammonium metavanadate (NH 4 VO 3 ), 5.9 grams of copper oxide (CuO), 30.3 grams of tungsten trioxide (WO 3 ), 6.9 grams of antimony trioxide (Sb 2 o 3 ), 3.7 grams of iron oxide (Fe 2 o 3 ) and 0.64 grams of potassium hydroxide (KOH), 10 grams of methylcellulose (weight average molecular weight 20000), 230 grams of carrier SiO 2 1. Dry mix 25 grams of kaolin in a kneader for 1 hour, then add 15 grams of nitric acid and 100 grams of deionized water into the powder, and continue kneading for 1 hour. Raschig rings with an outer diameter of 5 mm, an inner diameter of 1.5 mm and a length of 5 mm were obtained, and then calcined for 2 hours to obtain a finished catalyst at a calcining temperature of 500° C.

Embodiment 3

[0053] 200 grams of ammonium heptamolybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O), 32.9 grams of ammonium metavanadate (NH 4 VO 3 ), 5.9 grams of copper oxide (CuO), 25.6 grams of tungsten carbide (WC), 6.9 grams of antimony trioxide (Sb 2 o 3 ), 3.7 grams of iron oxide (Fe 2 o 3 ) and 0.64 grams of potassium hydroxide (KOH), 10 grams of methylcellulose (weight average molecular weight 20000), 230 grams of carrier SiO 2 1. Dry mix 25 grams of kaolin in a kneader for 1 hour, then add 15 grams of nitric acid and 100 grams of deionized water into the powder, and continue kneading for 1 hour. Raschig rings with an outer diameter of 5 mm, an inner diameter of 1.5 mm and a length of 5 mm were obtained, and then calcined for 2 hours to obtain a finished catalyst at a calcining temperature of 500° C.

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Abstract

The invention relates to an acrylic acid catalyst, a preparation method thereof and a synthetic method of acrylic acid, and mainly solves the technical problem in the prior art that acrylic acid is low in yield. According to the technical scheme of the invention, the acrylic acid catalyst comprises 40-80 parts by weight of at least one carrier selected from SiO2, Al2O3, ZrO2 and TiO2; and 20-60 parts by weight of an active component Mo12VaCubWcXdYeZfOg loaded on the carrier. Y is at least one element selected from Fe, Bi, Co, Ni, Ge, Ga, Nb, Ce, La, Zr and Sr, and Z is at least one element selected from alkali metal and alkaline earth metal. In this way, the above technical problem in the prior art is well solved. The acrylic acid catalyst can be used for the industrial production of acrylic acid.

Description

technical field [0001] The invention relates to a catalyst for synthesizing acrylic acid from acrolein, a preparation method and acrylic acid synthesis method. Background technique [0002] At present, a two-step process is adopted for the production of acrylic acid from propylene oxidation in industry. The first step is to oxidize propylene to acrolein under the action of Mo-Bi composite oxide catalyst, and the second step is to oxidize acrolein under the action of Mo-V composite oxide catalyst. Oxidized to acrylic acid. Acrylic acid and its esters are widely used. Crude acid is mainly used in the production of water-soluble coatings and adhesives, and refined acid is mainly used in the production of super absorbent resin SAP. With the development of construction, electronics, and automobile industries, the demand and production capacity of acrylic acid continue to increase worldwide, especially in recent years. The domestic production capacity of acrylic acid has increase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888C07C51/235C07C57/055
Inventor 徐文杰杨斌缪晓春奚美珍
Owner CHINA PETROLEUM & CHEM CORP