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VPO/SBA-15 catalyst, preparation method and application

A catalyst and application technology, applied in the field of organic catalysis, can solve the problems of lack of control means in the acetic acid project, and achieve good catalytic activity and stability

Inactive Publication Date: 2017-09-12
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because the country lacks effective control measures for the construction of acetic acid projects, the production capacity of acetic acid has far exceeded the growth of domestic demand. By the end of 2015, the total production capacity of acetic acid synthesized by carbonylation in China reached 9 million tons

Method used

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  • VPO/SBA-15 catalyst, preparation method and application
  • VPO/SBA-15 catalyst, preparation method and application
  • VPO/SBA-15 catalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Catalyst preparation:

[0021] VPO / SBA-15 catalyst is prepared by organic phase method: first take by weighing the vanadium pentoxide of 1.5270g, join in the there-necked flask and then add 30ml isobutanol and 30ml benzyl alcohol (V:V=1:1), in Stir and reflux at 140°C for 6 hours until vanadium pentoxide is completely dissolved. According to the composition requirements of the P / V=1.2 ratio of the catalyst, weigh 3.3216g of phosphoric acid, slowly add it into the flask and reflux for 6h; turn off the heating switch, and add 8g SBA-15, stirring; rapid stirring for 3 hours, the VPO component and the carrier are fully mixed, the sample is suction filtered, washed with isobutanol and acetone, dried at 120°C for 24 hours, fully ground, and roasted at 500°C for 4.5h , The sample was pressed into tablets under a pressure of 10Mpa, and sieved to make a catalyst precursor of 20-40 meshes.

[0022] Formaldehyde condensation of acetic acid to prepare acrylic acid:

[0023] A fi...

Embodiment 2

[0027] Same as Example 1, but the ratio of P / V in the catalyst is changed so that the P / V molar ratio is 2.0 / 1, and the results are shown in Table 2.

[0028] Table 2. VPO / SBA-15 (P / V=2.0 / 1) catalyzed formaldehyde acetate to prepare acrylic acid result table

[0029]

Embodiment 3

[0031] Same as Example 1, but the ratio of P / V in the catalyst is changed so that the P / V molar ratio is 2.8 / 1, and the obtained results are shown in Table 3.

[0032] Table 3. VPO / SBA-15 (P / V=2.8 / 1) catalyzed formaldehyde acetate to prepare acrylic acid result table

[0033]

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Abstract

The invention provides a VPO / SBA-15 catalyst, a preparation method and application. The preparation method comprises the following preparation steps: firstly, weighing vanadium pentoxide, adding the vanadium pentoxide in a three-neck flask, then adding isobutanol and phenylcarbinol, and stirring and refluxing at constant temperature until vanadium pentoxide is dissolved completely; weighing a certain amount of phosphoric acid, slowly adding the phosphoric acid in the flask, and then continuing carrying out refluxing reaction at constant temperature until a solution is sapphirine to obtain vanadium phosphorous oxide referred as VPO; adding SBA-15 in the three-neck flask, and rapidly stirring to react; and after reaction is finished, taking out a sample, carrying out suction filtration, washing the sample with the isobutanol and acetone, then drying, grinding and roasting the sample, carrying out tabletting on the sample, and sieving the tablets to obtain the VPO / SBA-15 catalyst. The VPO / SBA-15 catalyst has the remarkable characteristic that the used VPO / SBA-15 catalyst has good catalytic activity and stability in a reaction process.

Description

technical field [0001] The invention relates to a VPO / SBA-15 catalyst, a preparation method thereof and the use of catalyzing the condensation of acetic acid and paraformaldehyde to prepare acrylic acid, belonging to the field of organic catalysis. Background technique [0002] Acrylic acid is an important chemical raw material, and its molecule has a special double bond structure and acidic functional groups. Because the polymers produced by acrylic acid and its derivatives are colorless, transparent, viscous and elastic, stable to light, and not easily weathered, they are widely used in coatings, textiles, adhesives, pulp treatment, glazing agents, leather, Fiber, detergent and superabsorbent materials and other fields. Based on its wide application in the chemical industry, the demand for acrylic acid has been increasing in recent years. At the same time, with the enrichment and development of downstream products, its market will further expand. All large-scale acrylic ...

Claims

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Application Information

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IPC IPC(8): B01J31/18B01J27/188C07C51/353C07C57/04
CPCB01J27/188B01J29/0341B01J2229/20C07C51/353C07C57/04
Inventor 胡靖王爱丽殷恒波卢志鹏
Owner JIANGSU UNIV
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