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Catalyst for selectively reducing saturated aldehyde, and production method thereof

A catalyst and selective technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low conversion rate of saturated aldehydes to unsaturated aldehydes, catalysts Deterioration and other problems, to achieve the effect of simplifying the purification stage and important industrial value

Inactive Publication Date: 2014-03-19
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, the catalysts mentioned in these documents have the following problems: coke deposition, occurrence of side reactions to hydroxyacetone, propionaldehyde, acetaldehyde, acetone, addition reaction of acrolein to glycerol, polycondensation of glycerol, formation of cyclic glycerol Ethers, phenols, and polyaromatics, which degrade catalysts
[0035] As is clear from the above patent documents and non-patent documents, the conversion of saturated aldehydes to unsaturated aldehydes is still at a low level due to several problems including catalyst degradation

Method used

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  • Catalyst for selectively reducing saturated aldehyde, and production method thereof
  • Catalyst for selectively reducing saturated aldehyde, and production method thereof
  • Catalyst for selectively reducing saturated aldehyde, and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0162] CsPM

[0163]100 g of phosphomolybdic acid were dissolved in 200 ml of pure water and stirred at ambient temperature for 2 hours while diluting 32.7 g of a 48.5% by weight aqueous CsOH solution in 20 ml of pure water. The resulting aqueous CsOH solution was added dropwise to the aqueous phosphomolybdic acid solution at ambient temperature with stirring over 2 hours. The resulting yellow slurry was dried with a rotary evaporator at 60°C under reduced pressure to obtain a powder, which was then further dried with a drier at 120°C for 10 hours at ambient pressure. The resulting dry powder had the following composition:

[0164] Cs 2.5 P 1.0 Mo 12 .

[0165] The powder was further calcined in air at 250° C. for 3 hours in a muffle furnace.

Embodiment 2

[0167] CsPWMo

[0168] 50 g of phosphotungstomolybdic acid were dissolved in 20 ml of pure water and stirred at ambient temperature for 2 hours while diluting 13.4 g of a 48.5% by weight aqueous CsOH solution in 50 ml of pure water. The resulting aqueous CsOH solution was added dropwise to the aqueous phosphotungstomolybdic acid solution at ambient temperature with stirring over 2 hours. The resulting yellow slurry was dried with a rotary evaporator at 60°C under reduced pressure to obtain a powder, which was then further dried with a drier at 120°C for 10 hours at ambient pressure. The resulting dry powder had the following composition:

[0169] Cs 2.5 P 1.0 W 6 Mo 6 .

[0170] The powder was further calcined in air at 250° C. for 3 hours in a muffle furnace.

Embodiment 3

[0172] MoVPCuAs

[0173] 100 g of molybdenum trioxide, 6.3 g of vanadium pentoxide, 1.1 g of copper oxide, 8.0 g of 85% by weight orthophosphoric acid, and 1.8 g of 60% by weight arsenic acid were mixed in 1000 ml of pure water. Hydrogen peroxide was added to the resulting mixture and refluxed for 6 hours until a clear reddish-brown solution was obtained. A small amount of insoluble matter was removed from the resulting solution, and the solution was evaporated to dryness by using a water bath. The resulting dry powder had the following composition:

[0174] Mo 10 V 1.0 P 1.0 Cu 0.2 As 0.2 .

[0175] The powder was further calcined in air at 310° C. for 5 hours in a muffle furnace.

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Abstract

[Problem] To provide a novel catalyst for selectively reducing propionaldehyde from a starting-material acrolein in order to produce an acrolein and / or acrylic acid and / or acrylonitrile and / or methylmercaptopropionaldehyde that has a low-concentration of propionaldehyde and / or propionic acid and / or propionitrile. In particular, to provide a catalyst used to selectively reduce propionaldehyde-containing acrolein. [Solution] A catalyst used for selectively reducing propionaldehyde from propionaldehyde-containing acrolein, said catalyst including Mo as the essential component, and further containing at least one element selected from P, Si, W, Ti, Zr, V, Nb, Ta, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, In, Tl, Sn, Ag, As, Ge, B, Bi, La, Ba, Sb, Te, Ce, Pb, Mg, K, Rb, Cs and Al, and preferably from P, Si, W, Ti, Cr, Mn, Fe, Co, Ni, Zn, Sn, Bi, Sb, Ce, Mg, Cs and K.

Description

technical field [0001] The present invention relates to a novel catalyst for selectively reducing saturated aldehydes, especially propionaldehyde, and a preparation method thereof. [0002] In particular, the present invention relates to the production of acrolein and / or acrylic acid and / or acrylonitrile with low concentrations of propionaldehyde and / or propionic acid and / or propionitrile in the gas or liquid phase from acrolein-rich mixtures (via Oxidation and dehydration of glycerol to produce mixtures containing acrolein as a major component with by-products containing propionaldehyde and new compounds for the selective reduction of propionaldehyde in other compounds such as acrylic acid, acetaldehyde, acetone, phenol) Catalyst and method for its preparation. [0003] The present invention also relates to a novel catalyst for selectively reducing propionaldehyde from propionaldehyde-containing acrolein and a method for its preparation. [0004] In particular, the present ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/199B01J23/88B01J27/19C07C45/85C07C47/22
CPCB01J23/881B01J27/19B01J27/199C07C45/85C07C45/78B01J21/063B01J23/8876C07C47/22
Inventor 奥村公人川口彻小林康志
Owner NIPPON KAYAKU CO LTD
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