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Method for preparing acrylic acid from propane

A technology of acrylic acid and propane, which is applied in the field of acrylic acid preparation of organic chemical industry, can solve the problems of unstable catalyst structure, influence reaction efficiency, etc., and achieve the effect of low price and lower production cost.

Active Publication Date: 2021-06-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problem in the prior art that the catalyst structure in the reaction of preparing acrylic acid from propane is unstable and affects the reaction efficiency, the present invention provides a method for preparing acrylic acid from propane. The catalyst used is added with a stabilizer, which has good stability. Improved reaction efficiency

Method used

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  • Method for preparing acrylic acid from propane
  • Method for preparing acrylic acid from propane
  • Method for preparing acrylic acid from propane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The MO-V-TE-NB-O catalyst (active component) was prepared using a programmed temperature hydrothermal synthesis method. According to the method in CN101612564, the steps include: first weighing a ratio of ammonium molybdate, sulfate oxide, tamaric acid and oxalate, respectively, after heating for 30 minutes, slowly mixing each solution in turn Together, stirring was transferred to a stainless steel tube synthetic kettle, raised from the room temperature to 190 ° C at 10 ° C / min, and naturally fell to room temperature after 20 h, then removed, filtered, dried. After the obtained black solid was placed in the calcining container, the temperature rose from the room temperature to 300 ° C at 3 ° C / min, and after holding it for 2 hours (the atmosphere was air), then the same temperature rise rate rose to 600 ° C. After 2 hours (atmosphere nitrogen) was continued (the atmosphere was nitrogen) naturally, the resulting product was the calcined Mo-V-TE-NB-NB-O catalyst, and the ...

Embodiment 2

[0034] The Mo-V-TE-NB-O catalyst was prepared according to the method of Example 1.

[0035] Take 1 g of 20 to 30 to the catalyst for propane to select an oxidation reaction, and the reaction conditions are different from Example 1, the specific reaction conditions are: reaction temperature 370 ° C, the total volume vacant 5000H -1 , Propane / air / water vapor (volume ratio) is 10 / 65 / 25, and the reaction pressure is 2.5 atm (2.5 atmospheric pressure). The reaction lasts for 800 hours, and the reaction results are in Table 2. The results showed that under a more severe reaction conditions, the catalyst activity decreased with time, and the propane conversion decreased by about 17.1% in 800 hours.

[0036] Table 2

[0037]

[0038]

Embodiment 3

[0040] According to the preparation method of Example 1, 30% of the SiC was added in addition to the mixture in the preparation process, and the MO-V-TE-NB-O composite catalyst of the present embodiment was prepared.

[0041] 1 g 20 to 30 were taken for propane to select an oxidation reaction, and the reaction conditions were the same as in Example 2. The reaction lasts for 800 hours, and the reaction results are in Table 3. The addition of SiC completely stabilizes the catalyst active component, and the propane conversion rate is almost no change in 800 hours.

[0042] table 3

[0043]

[0044]

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Abstract

The invention provides a method for preparing acrylic acid from propane. The catalyst used is a composite catalyst consisting of a molybdenum vanadium tellurium niobium catalyst and a stabilizer. The stabilizer is selected from SiC, Al 2 o 3 or SiO 2 at least one of the In the composite catalyst, the mass percentage of the stabilizer is 5-95%, preferably 20-70%, more preferably 30-50%. In the method of the present invention, a composite catalyst composed of molybdenum vanadium tellurium niobium catalyst powder and a stabilizer is used, and the stabilizer is creatively introduced into the catalyst. First, the catalyst can be stabilized under severe reaction conditions, because the stabilizer It is conducive to the dispersion and transfer of reaction heat, thereby avoiding the high hot spot temperature inside the catalyst; secondly, the stabilizer itself, as a cheap diluent, can also significantly reduce the production cost of the catalyst.

Description

Technical field [0001] The present invention relates to an organic chemically preparing technique, in particular, a molybdenum vanadium ruthenium oxide catalyst comprising a stabilizer in propane oxide acrylic acid reaction. Background technique [0002] Acrylic acid and its ester series products are important organic chemical raw materials, they are widely used in coatings, chemical fiber, textile, light industries, as well as oil exploitation, oil additives, etc. Currently developed new application areas. [0003] Acrylic production has experienced multiple development phases. In 1843, Joseplredtenbach was oxidized acrylic acid under the conditions of silver oxide. In 1901 OFFO ROHM discovered that the polymer of acrylic acid and its ester was important industrial use. The acrylic acid and its ester were widely concerned. In 1927, ROHM & HASS has been used to prepare cyanol with chlorocol and sodium cyanide. Methyl acrylate was obtained by dehydration, hydrolysis and methanol, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/215C07C57/05B01J33/00
CPCB01J33/00C07C51/215C07C57/04
Inventor 杨维慎王红心楚文玲李清强李旭王宏奎刘延纯
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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