Preparation method of phosphorus vanadium catalyst for using acetic acid and formaldehyde to synthesize crylic acid

A vanadium phosphate catalyst and acrylic acid technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic chemistry, etc., can solve the complex preparation process of vanadium phosphate catalyst, affect the health of workers, increase production costs and other problems, to achieve The preparation cycle is short, the risk is small, and the effect of reducing the preparation cost

Inactive Publication Date: 2011-08-24
SEDIN NINGBO ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vanadium phosphate catalyst needs to be fed with hydrogen chloride gas during the preparation process, and hydrogen chloride gas is very irritating to the human body, so if an accident occurs, it will seriously affect the health of the staff; on the other hand, special hydrogen chloride gas needs to be used to generate hydrogen chloride g

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method of acetic acid and formaldehyde synthetic acrylic acid phosphorus vanadium catalyst, it mainly comprises the following steps:

[0026] ①Weigh the powder vanadium pentoxide (V 2 o 5 ) 30g and isobutanol ((CH 3 ) 2 CHCH 2 OH) 122.3g, powder vanadium pentoxide (V 2 o 5 ) into a glass flask reactor equipped with a stirrer and a temperature controller such as a thermometer, and the organic medium isobutanol ((CH 3 ) 2 CHCH 2 OH) into a glass flask reactor to mix with vanadium pentoxide, and then slowly heat the mixture to a reflux temperature of 106°C through a temperature-controlled electric heating mantle, while stirring with a stirrer for 11 hours, and then cool the reactant to room temperature after the reaction is complete.

[0027] Here, the mass ratio of vanadium pentoxide to isobutanol is 1:10.

[0028] ②Weigh the solid orthophosphoric acid (H 3 PO 4 ) 34.3g and isobutanol 49.2g, import isobutanol into another glass flask react...

Embodiment 2

[0038] The concrete steps of present embodiment preparation acrylic acid synthetic phosphorus vanadium catalyst are as follows:

[0039] ①Weigh the powder vanadium pentoxide (V 2 o 5 ) 30g and isobutanol ((CH 3 ) 2 CHCH 2 OH) 97.8g, powder vanadium pentoxide (V 2 o 5 ) into a glass flask reactor equipped with a stirrer and a temperature controller such as a thermometer, and the organic medium isobutanol ((CH 3 ) 2 CHCH 2 OH) into a glass flask reactor to mix with vanadium pentoxide, and then slowly heat the mixture to a reflux temperature of 108°C through a temperature-controlled electric heating mantle, while stirring with a stirrer for 7 hours, and then lower the temperature of the reactant to room temperature after the reaction is complete.

[0040] Here, the mass ratio of vanadium pentoxide to isobutanol was 1:8.

[0041] ②Weigh the solid orthophosphoric acid (H 3 PO 4 ) 34.3g and isobutanol 49.2g, import isobutanol into another glass flask reactor equipped with...

Embodiment 3

[0051] The concrete steps of present embodiment preparation acrylic acid synthetic phosphorus vanadium catalyst are as follows:

[0052] ①Weigh the powder vanadium pentoxide (V 2 o 5 ) 30g and isobutanol ((CH 3 ) 2 CHCH 2 OH) 73.4g, powder vanadium pentoxide (V 2 o 5 ) into a glass flask reactor equipped with a stirrer and a temperature controller such as a thermometer, and the organic medium isobutanol ((CH 3 ) 2 CHCH 2 OH) into a glass flask reactor to mix with vanadium pentoxide, and then slowly heat the mixture to a reflux temperature of 108°C through a temperature-controlled electric heating mantle, while stirring with a stirrer for 9 hours, and then lower the temperature of the reactant to room temperature after the reaction is complete.

[0053] Here, the mass ratio of vanadium pentoxide to isobutanol is 1:6.

[0054] ②Weigh the solid orthophosphoric acid (H 3 PO 4 ) 34.3g and isobutanol 49.2g, import isobutanol into another glass flask reactor equipped with ...

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PUM

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Abstract

The invention discloses a preparation method of a phosphorus vanadium catalyst for using acetic acid and formaldehyde to synthesize crylic acid, comprising the following steps of: taking vanadium pentoxide, solid orthophosphoric acid and isobutanol as main materials, firstly mixing the isobutanol and the vanadium pentoxide, then using the isobutanol to dissolve the solid orthophosphoric acid completely, adding a certain amount of aluminium oxide while mixing the mixture, finally carrying out vacuum filtration and drying on reactants to obtain a phosphorus vanadium catalyst precursor, before use, rising the temperature to 380 DEG C at the activation temperature rising rate of 3 DEG C/min, introducing air to activate for two hours, and obtaining a novel phosphorus vanadium catalyst. The phosphorus vanadium catalyst is used as a catalyst in synthesizing the crylic acid by taking the acetic acid and the formaldehyde as materials; and in the reaction temperature interval of 320-380 DEG C, and under the optimum reaction condition, the single-pass yield of the crylic acid can be up to 93.5mol%, and the catalytic performance of the catalyst is obviously higher than that of the similar catalyst in synthesizing the crylic acid by taking the acetic acid and the formaldehyde as materials reported at present.

Description

technical field [0001] The invention relates to a preparation process of a phosphorus vanadium catalyst, in particular to a preparation method of a phosphorus vanadium catalyst for synthesizing acrylic acid with acetic acid and formaldehyde as raw materials. Background technique [0002] Acrylic acid (Acrylic Acid, AA) is an important organic chemical raw material, most of which are used to produce acrylates (such as methyl acrylate, ethyl, butyl and octyl, etc.), and a small amount is used to produce super absorbent resins and detergent builders and water treatment agents, etc. Acrylic acid and its ester series products can be widely used in coatings, chemical fibers, textiles, leather, plastics, and adhesives due to their excellent physical and chemical properties, especially their unique multi-functions such as miscibility, copolymerization, and esterification. , oil exploration and oil additives and other fields. [0003] Acrylic acid was industrialized in the 1930s, a...

Claims

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Application Information

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IPC IPC(8): B01J27/198C07C57/05
Inventor 谷新春王爱芳陈岩苗延军梁正王宇光
Owner SEDIN NINGBO ENG
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