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Catalyst carrier and preparation method as well as catalyst prepared by carrier and application of catalyst

A catalyst carrier and carrier technology, applied in the direction of catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of limited improvement of carrier performance and catalyst activity and selectivity, and achieve performance improvement and selectivity improvement Effect

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Above-mentioned these methods are also very limited to the improvement that the activity of carrier performance and catalyst and selectivity bring, so this area still needs carrier and its manufacture method to be improved, in order to be beneficial to manufacture the silver catalyst with better performance, especially selectivity better catalyst

Method used

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  • Catalyst carrier and preparation method as well as catalyst prepared by carrier and application of catalyst
  • Catalyst carrier and preparation method as well as catalyst prepared by carrier and application of catalyst
  • Catalyst carrier and preparation method as well as catalyst prepared by carrier and application of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0077] α-A1 2 o 3 Powder 400g, fake monohydrate A1 through 200 mesh sieve 2 o 3 100g, ammonium fluoride 10g, BaSO 4 3g was put into a mixer and mixed evenly, then transferred to a kneader, and 100 milliliters of 20% by weight nitric acid aqueous solution was added, and kneaded into a paste that could be extruded. Extrude into a five-hole column with an outer diameter of 8.0mm, a length of 6.0mm, and an inner diameter of 1.0mm, and dry at 80-120°C for 2 hours to reduce the free water content to below 10% by weight to obtain a green body. Then put the green body into an electric furnace, raise it from room temperature to 1400°C, and keep the temperature at this high temperature for 2 hours to obtain white α-A1 2 o 3 A carrier sample, referred to as Invention Vector 1.

Embodiment 2

[0079] The preparation of the inventive carrier 2 is similar to the preparation of the inventive carrier 1, only the "α-A1 2 o 3 "Powder 400g" is changed to "γ-A1 2 o 3 Powder 400g".

Embodiment 3

[0081] The preparation of the inventive carrier 3 is similar to the preparation of the inventive carrier 1, only the "α-A1 2 o 3 "Powder 400g" is changed to "ρ-A1 2 o 3 Powder 400g".

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Abstract

The invention provides a catalyst carrier and a preparation method as well as a catalyst prepared by the carrier and an application of the catalyst. According to the preparation method, activated aluminum oxide with various crystalline phases and of various types is employed, including one or more mixtures of gamma-A12O3, rho-A12O3, alpha-A12O3, kappa-A12O3, theta-A12O3 and the like, preferably one, two or three mixtures of gamma-A12O3, rho-A12O3 and alpha-A12O3, to replace or partially replace hydrate (namely aluminum hydroxide) of aluminum oxide as one of raw materials for preparing the carrier to prepare the carrier of a silver catalyst. The performances of the carrier prepared with the method are improved obviously. The carrier shows good activity and selectivity in an ethylene oxidation to oxirane process after loading silver and various active components to prepare the silver catalyst, and particularly, the selectivity is improved obviously.

Description

technical field [0001] The present invention relates to the field of catalysts, in particular to a silver catalyst carrier and a preparation method thereof, as well as a catalyst made from it and its application; more specifically to an alumina carrier for a silver catalyst used in the oxidation of ethylene to produce ethylene oxide The preparation method, the carrier made by the method, the silver catalyst and the application thereof. Background technique [0002] Under the action of silver catalyst, the oxidation of ethylene mainly produces ethylene oxide, and at the same time, side reactions produce carbon dioxide and water. The main performance indicators of silver catalysts include their activity, selectivity and stability. The activity generally refers to the reaction temperature required when the ethylene oxide production process reaches a certain reaction load; the lower the required reaction temperature, the higher the activity of the catalyst. Selectivity refers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J23/68C07D303/04C07D301/10
CPCY02P20/52
Inventor 林强孙欣欣李金兵陈建设张志祥林伟李贤丰任冬梅曹淑媛王辉
Owner CHINA PETROLEUM & CHEM CORP
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