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Catalyst for catalytically oxidizing propane for preparing acrylic acid, and preparation method thereof

A technology for oxidizing propane and acrylic acid, which is applied in the preparation of organic compounds, catalysts for physical/chemical processes, preparation of carboxylate, etc. The effect of improving the efficiency, simple preparation method and simple process

Inactive Publication Date: 2016-10-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation of acrylic acid from propylene has very considerable selectivity and yield of acrylic acid, from a long-term perspective, there is a major problem in this method: the raw material propylene reserves are limited and its price continues to increase
[0004] At present, the Mo-V-Te-Nb-O catalyst has the most industrial application prospect in the selective oxidation of propane to acrylic acid, but this catalyst has many elements and complex structure, and the reaction requires synergy between multiple active sites

Method used

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  • Catalyst for catalytically oxidizing propane for preparing acrylic acid, and preparation method thereof
  • Catalyst for catalytically oxidizing propane for preparing acrylic acid, and preparation method thereof
  • Catalyst for catalytically oxidizing propane for preparing acrylic acid, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mo 7.1 V 1.3 Te 1.26 Nb 1.28 o x Catalyst preparation:

[0032] Raw material: Ammonium molybdate: (NH 4 ) 6 Mo 7 o 24 4H 2 o

[0033] Ammonium metavanadate: NH 4 VO 3

[0034] Telluric acid: H 2 TeO 4 ··2H 2 o

[0035] Niobium oxalate: C 12 h 7 NbO 24

[0036] Add 1.766g ammonium molybdate, 0.214g ammonium metavanadate, 0.407g telluric acid and 20ml water to beaker No. 1 to dissolve at 80°C, add 1.132g niobium oxalate and 20ml distilled water to beaker No. 2 to make it dissolve at 80°C Dissolve, and then slowly add the solution in the No. 2 beaker to the No. 1 beaker dropwise. Continue to add distilled water to 80ml, then evaporate to dryness at 80°C and dry for 12h. Then, under the protection of nitrogen, it is fired at 150°C (low temperature) and 600°C (high temperature) respectively for 2 hours to prepare the multi-component composite metal oxide.

Embodiment 2

[0038] Mo 7.25 V 1.15 Te 1.26 Nb 1.28 o x Catalyst preparation:

[0039] In embodiment 1, change 0.214g ammonium metavanadate in catalyst preparation into 0.186g ammonium metavanadate, 0.407g telluric acid is changed into 0.399g telluric acid, 1.132g niobium oxalate is changed into 1.109g niobium oxalate namely cost implementation example.

Embodiment 3

[0041] Mo 7.4 V 1.0 Te 1.26 Nb 1.28 o x Catalyst preparation:

[0042] In embodiment 1, change 0.214g ammonium metavanadate in catalyst preparation into 0.158g ammonium metavanadate, 0.407g telluric acid is changed into 0.391g telluric acid, 1.132g niobium oxalate is changed into 1.086g niobium oxalate namely cost implementation example.

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Abstract

The invention relates to a catalyst for catalytically oxidizing propane for preparing acrylic acid. The catalyst has a general formula of Mo-V-Te-Nb-O. The molar ratio of the components of the catalyst is that Mo:V:Te:Nb=7.1-7.9:1.3-0.5:1.26:1.28, wherein Mo+V=8.4. The invention also provides a preparation method of the catalyst used for catalytically oxidizing propane for preparing acrylic acid. According to the invention, a dissolution-coprecipitation method is adopted. Ammonium molybdate, ammonium metavanadate, telluric acid and niobium oxalate solutions are prepared according to certain molar ratios; the solutions are mixed, and the mixture is evaporated to dryness under a constant temperature; and low-temperature roasting and high-temperature roasting are respectively carried out under a nitrogen atmosphere.

Description

technical field [0001] The invention relates to a catalyst for preparing acrylic acid by catalyzing the oxidation of propane, in particular to continuously adjusting the content of Mo and V to obtain a Mo-Te-V-Nb-O catalyst with high catalytic performance and a yield of acrylic acid exceeding 55%. Background technique [0002] Acrylic acid is one of the most important basic raw materials and intermediates of modern chemical industry. Because of its active polarity, unsaturated double bond and carboxylic acid structure, it can derive many kinds of acrylic ester compounds and polymers with good properties. Polypropylene and acrylic acid copolymers can also be used to produce superabsorbent resins and detergent builders, which provides a bright future for expanding the use of acrylic acid The prospect and promote the development of acrylic acid industry. In 2011, the total consumption of acrylic acid in the world reached 5.21 million tons, of which the production of superabsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057C07C51/215C07C57/05C07C53/08
Inventor 葛汉青陆维敏徐爱新南洋李燕张峰胡晓丽何崇慧高冬梅王雄景志刚刘肖飞王书峰林宏黄德华
Owner PETROCHINA CO LTD
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