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A kind of supported ce-vpo catalyst and its preparation method and application

A catalyst, supported technology, applied in molecular sieve catalysts, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of poor stability, low selectivity, weak catalytic activity, etc., and achieve the effect of good catalytic activity and stability

Inactive Publication Date: 2019-04-02
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In previous studies, it was found that the catalysts for the preparation of acrylic acid from acetate formaldehyde had weak catalytic activity, poor stability, and low selectivity. Therefore, it is particularly important to prepare high-efficiency, high-selectivity catalysts.

Method used

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  • A kind of supported ce-vpo catalyst and its preparation method and application
  • A kind of supported ce-vpo catalyst and its preparation method and application
  • A kind of supported ce-vpo catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation of embodiment 1 catalyst:

[0022] Ce(0.05)-VPO / SBA-15 catalyst is prepared by organic phase method: first take by weighing the vanadium pentoxide of 1.5288g, join in the there-necked flask and add 60ml isobutanol and 60ml benzyl alcohol (V:V=1 : 1), stirred and refluxed at 140°C for 6h, until vanadium pentoxide was completely dissolved. According to the composition requirements of the P / V=2.2 ratio of the catalyst, weigh 4.2555g of phosphoric acid, slowly add it into the flask and reflux for 6h; turn off the heating switch, and add 8g At the same time, according to the composition requirements of the catalyst, according to the ratio requirements of the amount of substances of P / V / Ce=2.2 / 1 / 0.05, adopting cerium ammonium nitrate as the cerium source, weighing 0.4600g of cerium nitrate Dissolve ammonium in 9.2mL of isobutanol, then add 9.2mL of isobutanol for washing, and add all of it into a three-neck flask, stir rapidly for 4 hours, so that the Ce elem...

Embodiment 2

[0028] Same as Example 1, but change the ratio of P / V / Ce in the catalyst so that P / V / Ce is 2.2 / 1 / 0.3 (ratio of the amount of substance), and the obtained results are shown in Table 2.

[0029] Table 2. Ce(0.3)-VPO / SBA-15 Catalyzed Acrylic Acid Formaldehyde Acrylic Acid Results Table

[0030]

Embodiment 3

[0032] Same as Example 1, keep P / V / Ce=2.2 / 1 / 0.05 (the ratio of the amount of substance) unchanged, change the carrier type, make the P / V / Ce molar ratio be 2.2 / 1 / 0.05, and use SiO 2 The results are shown in Table 3.

[0033] Table 3. Ce(0.05)-VPO / SiO 2 Catalytic acetate formaldehyde to prepare acrylic acid result table

[0034]

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Abstract

The invention provides a load type Ce-VPO catalyst and a preparation method and an application thereof. The preparation method comprises the steps: 1, weighing vanadium pentoxide, adding the vanadium pentoxide to a three-mouth flask, then adding isobutyl alcohol and a phenylcarbinol solution, carrying out constant temperature stirring refluxing until the vanadium pentoxide is dissolved completely; and then slowing adding phosphoric acid to the three-mouth flask, carrying out a constant temperature refluxing reaction until the solution is deep blue, and closing an oil bath heating switch, to obtain a VPO precursor; 2, adding a carrier into the three-mouth flask in the step 1, then adding an isobutanol solution of cerium ammonium nitrate to the three-mouth flask, carrying out a rapid stirring reaction, after the completion of the reaction, taking out the sample, carrying out suction filtration, washing with isobutyl alcohol and acetone, drying, grinding, roasting, tabletting, sieving, and thus obtaining the load type Ce-VPO catalyst. The prepared load type Ce-VPO catalyst has good catalytic activity and stability in a reaction process.

Description

technical field [0001] The invention relates to a supported Ce-VPO catalyst, a preparation method and application thereof, and belongs to the field of organic catalysis. Background technique [0002] Acrylic acid and its esters are extremely important basic raw materials and intermediates in modern chemical industry. Plastic cross-linked polymers can be prepared through emulsion polymerization, solution polymerization, etc., and can also be widely used in superabsorbent resins, adhesives, coatings, Textile auxiliaries and oilfield chemicals and many other fields. [0003] At present, the most mature technology and the highest proportion of industrial production is the ethylene oxidation method. Almost all industrialized large-scale acrylic acid production facilities in the world use the two-step oxidation method of propylene. The propylene oxidation method uses the petroleum route, and the synthesis of acrylic acid from acetic acid formaldehyde belongs to the coal chemical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/198B01J29/03C07C51/353C07C57/04
CPCB01J27/198B01J29/0341B01J2229/18C07C51/353C07C57/04
Inventor 胡靖殷恒波
Owner JIANGSU UNIV