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Catalysts for the synthesis of allyl acetate

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

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 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 for the synthesis of allyl acetate
  • Catalysts for the synthesis of allyl acetate
  • Catalysts for the synthesis of allyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Sodium bicarbonate pH regulator and water are used as solvent preparation pH to be 1.02, containing 4.97gPd and 0.55gCu Chloropalladic acid, copper chloride aqueous solution, obtain impregnating liquid 560ml, it is impregnated in 1.5L diameter 5.6mm spherical SiO 2 On the carrier, control the rotating speed of the pan, and after drying at 80°C, 105ml contains 29.2gNa 2 SiO 3 9H 2 The solution of O was fully mixed, aged for 24h, and then used with a solubility of 10% (in the form of N 2 h 4 ·H 2 (2 weight ratio) is 750ml hydrazine hydrate to carry out reduction, washes with water, 90 ℃ of drying, contains 70gN with 452ml, the acetonitrile solution of N'-dihydroxypyromellitic acid imide (NDHPI) mixes, and drying obtains finished catalyst.

[0027] The Pd content of the catalyst is 3.15g / L, the Cu content is 0.35g / L, and the N,N'-dihydroxypyromellitic acid imide (NDHPI) content is 45.58g / L. The activity of the catalyst is 421g / L·h, and the selectivity to allyl acetat...

Embodiment 2-4

[0034] Only change the kind of cocatalyst nitrogen oxide compound, do not change its input amount, all the other operations are the same as embodiment 1, the main preparation conditions of the catalyst obtained in each embodiment are listed in table 1, and the physical properties and catalytic properties of the catalyst are listed in table 2.

Embodiment 5

[0036] Sodium bicarbonate pH adjuster and water are used as solvent preparation pH to be 1.02, containing 1.85gPd and 0.25gCu Chloropalladic acid, copper chloride aqueous solution, obtain impregnating liquid 539ml, it is impregnated in 1.5L diameter 5.6mm spherical SiO 2 On the carrier, control the rotating speed of the pot, after drying at 80°C, and 80ml containing 15.3gNa 2 SiO 3 9H 2 The solution of O was fully mixed, aged for 24h, and then used with a solubility of 10% (in the form of N 2 h 4 ·H 2 (2 weight ratio) is 550ml hydrazine hydrate to reduce, wash with water, dry at 90 DEG C, mix with 356ml containing 30gN, the acetonitrile solution of N'-dihydroxypyromellitic acid imide (NDHPI), dry to obtain finished catalyst.

[0037] The Pd content of the catalyst is 1.18g / L, the Cu content is 0.16g / L, and the N,N'-dihydroxypyromellitic acid imide (NDHPI) content is 19.76g / L. The activity of the catalyst is 359g / L·h, and the selectivity to allyl acetate is 94.1%.

[003...

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Abstract

The invention relates to a catalyst used for allyl acetate synthesis, and mainly solves problems of low catalyst activity and low selectivity of catalysts existing in the prior art. The catalyst is obtained by loading Pd, Cu and a cocatalyst on a carrier, wherein the carrier is SiO2, Al2O3 or a mixture containing SiO2 and Al2O3, and the cocatalyst is at least one of oxynitrides represented by general formulas I, II, III and IV shown in the specification.

Description

technical field [0001] The invention relates to a catalyst for the synthesis of allyl acetate. Background technique [0002] In the reaction of preparing allyl acetate by 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 preparation method of this catalyst has been disclosed by US3,917,676 (titled: Process for producingally acetate), that is, the mixed solution containing noble metal Pd and Cu is impregnated on the carrier, after drying, the free Pd and Cu are solidified on the carrier surface and The active metal state Pd and Cu are formed, and then the catalyst is obtained after being treated with co-catalyst KOAc and dried. The catalyst obtained by this method has low activity and selecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02B01J31/26C07C69/155C07C67/055
Inventor 查晓钟杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP