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Catalysts used in the preparation of allyl acetate

A technology of allyl acetate and catalyst, which is applied in the preparation of carboxylate, physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, etc. higher question

Active Publication Date: 2019-06-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is the low problem of allyl acetate catalyst activity and selectivity synthesized in the prior art

Method used

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  • Catalysts used in the preparation of allyl acetate
  • Catalysts used in the preparation of allyl acetate
  • Catalysts used in the preparation of allyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of the carrier: 0.66g of ruthenium dioxide (RuO 2 ) powder and 1.0g of silica sol are fully mixed to obtain a coating solution, and the coating solution is evenly sprayed on 1.0L of spherical SiO with a diameter of 5.6mm 2 on the carrier, dried at 100°C, and calcined at 500°C in a muffle furnace to obtain the catalyst carrier. The Ru content in the carrier was determined to be 0.50 g / L by ICP.

[0037] Catalyst preparation:

[0038] (1) Use sodium bicarbonate pH regulator and water as a solvent to prepare a pH of 1.06, containing 3.18gPd and 0.37gCu of chloropalladic acid and copper chloride aqueous solution to obtain 590ml of impregnating solution. impregnating it on the catalyst carrier in a rotating pan to obtain catalyst precursor I;

[0039] (2) After drying at 80°C, 105ml contains 21.5g Na 2 SiO 3 9H 2 The solution of O was fully mixed, and aged for 24h to obtain catalyst precursor II;

[0040] (3) With a solubility of 10% (in N 2 h 4 ·H 2 (2 i...

Embodiment 2

[0048] Preparation of the carrier: 0.56g of bismuth trioxide (Bi 2 o 3 ) powder and 1.0g of silica sol are fully mixed to obtain a coating solution, and the coating solution is evenly sprayed on 1.0L of spherical SiO with a diameter of 5.6mm 2 on the carrier, dried at 100°C, and calcined at 500°C in a muffle furnace to obtain the catalyst carrier. The Bi content in the carrier was determined by ICP to be 0.50 g / L.

[0049] Catalyst preparation:

[0050] (1) Use sodium bicarbonate pH regulator and water as a solvent to prepare a pH of 1.06, containing 3.18gPd and 0.37gCu of chloropalladic acid and copper chloride aqueous solution to obtain 590ml of impregnating solution. impregnating it on the catalyst carrier in a rotating pan to obtain catalyst precursor I;

[0051] (2) After drying at 80°C, 105ml contains 21.5g Na 2 SiO 3 9H 2 The solution of O was fully mixed, and aged for 24h to obtain catalyst precursor II;

[0052] (3) With a solubility of 10% (in N 2 h 4 ·H 2...

Embodiment 3

[0099] The preparation of carrier: the dirhodium trioxide of 0.62g (Rh 2 o 3 ) powder and 1.0g of silica sol are fully mixed to obtain a coating solution, and the coating solution is evenly sprayed on 1.0L of spherical SiO with a diameter of 5.6mm 2 on the carrier, dried at 100°C, and calcined at 500°C in a muffle furnace to obtain the catalyst carrier. The Rh content in the carrier was determined to be 0.50 g / L by ICP.

[0100] Catalyst preparation:

[0101] (1) Use sodium bicarbonate pH regulator and water as a solvent to prepare a pH of 1.06, containing 3.18gPd and 0.37gCu of chloropalladic acid and copper chloride aqueous solution to obtain 590ml of impregnating solution. impregnating it on the catalyst carrier in a rotating pan to obtain catalyst precursor I;

[0102] (2) After drying at 80°C, 105ml contains 21.5g Na 2 SiO 3 9H 2 The solution of O was fully mixed, and aged for 24h to obtain catalyst precursor II;

[0103] (3) With a solubility of 10% (in N 2 h 4...

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Abstract

The invention relates to a catalyst for preparing allyl acetate. The catalyst is mainly used for solving the problem in the prior art that catalysts are not high in activity and selectivity. According to the catalyst, through adopting the technical scheme that the catalyst for preparing the allyl acetate contains a carrier, an active ingredient and a cocatalyst, wherein the active ingredient comprises Pd and Cu, the cocatalyst is alkali metal acetate, the carrier comprises a carrier substrate and a surface coating, the substrate is porous silicon dioxide, the coating is prepared from modification metal elements and a silicon dioxide bonder which is used for bonding the modification metal elements to the surface of the substrate, the content of the modification metal elements is 0.10g / L to 1.00g / L, and the modification elements are at least one selected from platinum-family metal elements and VA metal elements, the problem is better solved, so that the catalyst can be applied to the industrial production of the allyl acetate.

Description

technical field [0001] The invention relates to an allyl acetate catalyst, a preparation method of the catalyst and a synthesis method of allyl acetate. Background technique [0002] Allyl acetate is a colorless flammable liquid, slightly soluble in water, easily soluble in alcohol and ether, and soluble in acetone. As an important chemical raw material, it is mainly used in the production of propenyl alcohol and epichlorohydrin. [0003] In the 1980s, Japan’s Showa Denko and the former Soviet Academy of Sciences proposed the use of acetyl oxidation technology in the presence of palladium and co-catalysts to prepare allyl acetate in a fixed-bed gas phase reaction using propylene, oxygen and acetic acid as raw materials. SiO 2 、Al 2 o 3 or SiO 2 and Al 2 o 3 The composed mixture is used as a carrier, loaded with Pd, Cu and potassium acetate, and the catalysts in which Pd and Cu are distributed in an eggshell shape are well known to those skilled in the art. The prepara...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28C07C67/055C07C69/155
CPCB01J23/18B01J23/42B01J23/44B01J23/462B01J23/464B01J23/466B01J23/468B01J23/72B01J31/28B01J35/0006C07C67/055C07C69/155
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP
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