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A preparation method of acetate propylene ester synthesis catalysts

The technology of propylene acetate and catalyst is applied in the field of preparation of propylene acetate synthesis catalyst, can solve problems such as application limitation, and achieve the effects of large active metal surface area, high activity and selectivity, and concentrated particle size distribution

Inactive Publication Date: 2008-04-09
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the noble metal catalysts prepared by the current metal colloid method all use powdery carriers, which limits their application.

Method used

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  • A preparation method of acetate propylene ester synthesis catalysts
  • A preparation method of acetate propylene ester synthesis catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] With chloropalladium acid (H 2 PdCl 4 ) and chloroauric acid equivalent to 0.15gAu (HAuCl 4 ) configure 400ml of aqueous solution, add 30ml of 5g / L PVP solution into the above solution, stir for 1hr, and add 6.0g / L of NaBH dropwise 4 Aqueous solution 200ml, PVP-protected metal colloid is obtained after reduction. The metal colloid was loaded on a 1L silica carrier, dried at 110°C for 4 hours, cooled to room temperature, impregnated with an equal volume of aqueous solution containing 15g of KOAc, taken out and dried at 110°C to finally obtain a finished catalyst.

[0022] Catalyst Performance Evaluation:

[0023] Reactor: fixed bed reactor

[0024] Catalyst loading volume: 600ml

[0025] Reactor inlet pressure: 0.7MPa

[0026] Reaction temperature: 140~160℃

[0027] Response time: 500hr

[0028] Mixed gas flow: 7~8Kg / h

[0029] In the evaluation data:

[0030]

[0031]

[0032] Catalyst activity evaluation is shown in Table 1.

Embodiment 2

[0034] Metal colloid preparation contains the equivalent of 1.5g of chloropalladic acid and the equivalent of 0.15g of copper chloride (CuCl 2 ) preparation aqueous solution, all the other catalyst preparation steps are with embodiment 1.

[0035] The catalyst was tested as in Example 1, and the evaluation results are shown in Table 1.

Embodiment 3

[0037] Metal colloid preparation contains the equivalent of 1.5g of chloropalladic acid and the equivalent of 0.15g of tin chloride (SnCl 2 ) preparation aqueous solution, all the other catalyst preparation steps are with embodiment 1.

[0038] The catalyst was tested as in Example 1, and the evaluation results are shown in Table 1.

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Abstract

The invention relates to a preparation method for acetic acid propylene ester synthetic catalyst. The carrier of the catalyst is silicon dioxide or the mixture of the silicon dioxide and aluminum oxide, and active components comprise main catalyst palladium, one of auxiliary catalyst of gold, copper, tin, cadmium, cerium, or a mixture of more auxiliary catalyst, kalium, etc. Being prepared by adopting a metal colloid method, the catalyst has the advantages that the grain size distribution is concentrated, the dispersion degree is high, the distribution of the active components on the carrier can be adjusted and controlled, etc. In the reaction of acetic acid propylene ester synthesized with propylene, acetic acid, and oxygen, the catalyst prepared by the method has the advantages that the selectivity is high, the activity is good, etc.

Description

technical field [0001] The invention relates to the field of catalyst manufacture, and relates to a method for preparing a catalyst for the synthesis of propylene acetate, aiming to provide a catalyst preparation method for the synthesis of propylene acetate from propylene, acetic acid and oxygen, which is highly active and prepared by a metal colloid method . Background technique [0002] Acryl acetate is an important chemical raw material with a wide range of uses. The main method of producing propylene acetate in the world today is to synthesize propylene, oxygen and acetic acid through gas-phase catalytic reaction. In order to obtain catalysts with high activity and high selectivity, continuous improvements have been made in the composition of active components, preparation techniques, and even shapes of catalysts. [0003] The early preparation method of propylene acetate catalyst is to impregnate Pd, Cu and other metals on the carrier (USP3917676), that is, the preci...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J23/52B01J23/89B01J23/62C07C69/15C07C67/055
Inventor 于海斌孙彦民姜雪丹苗静成宏李孝国
Owner CHINA NAT OFFSHORE OIL CORP
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