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Preparation method of silver catalyst carrier, silver catalyst carrier thus obtained, silver catalyst and application thereof

A silver catalyst and catalyst technology, applied in the direction of catalyst carrier, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problems of reduced compressive strength, reduced specific surface and porosity, high compressive strength, etc.

Active Publication Date: 2018-01-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carrier has a better specific surface and porosity, and the compressive strength may decrease; on the contrary, the high compressive strength will reduce the specific surface and porosity

Method used

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  • Preparation method of silver catalyst carrier, silver catalyst carrier thus obtained, silver catalyst and application thereof
  • Preparation method of silver catalyst carrier, silver catalyst carrier thus obtained, silver catalyst and application thereof
  • Preparation method of silver catalyst carrier, silver catalyst carrier thus obtained, silver catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Preparation of vector

[0062] 50~500 mesh trihydrate α-Al 2 o 3 4800g, false monohydrate Al through 200 mesh sieve 2 o 3 1200g, NH 4F150g, 21g of barium nitrate and 9.8g of silicon dioxide are put into the mixer and mixed evenly, then transferred to the kneader, add 42g of petrolatum and 2100ml of dilute nitric acid (nitric acid: water = 1:3, weight ratio), and knead into an extrudable Formed paste. 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 it at 80-120°C for more than 2 hours to reduce the free moisture content to below 10%. Put the kneaded carrier into a bell kiln, raise it from room temperature to 1280° C. over 33 hours, and calcinate at 1280° C. for 10 hours to obtain a white silver catalyst carrier. The measured carrier physical properties and pore structure distribution data are shown in Table 1 below.

[0063] Catalyst preparation

[0064] Dissolve 980g of ethylenediamine a...

Embodiment 2

[0070] 50~500 mesh trihydrate α-Al 2 o 3 4800g, false monohydrate Al through 200 mesh sieve 2 o 3 1200g, NH4F150g, 21g of barium nitrate and 9.8g of silicon dioxide are put into the mixer and mix evenly, transfer to the kneader, add 22.3g tetrabutyl titanate, 42g vaseline and 2100ml dilute nitric acid (nitric acid: water=1: 3, weight ratio), kneaded into a paste that can 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 it at 80-120°C for more than 2 hours to reduce the free moisture content to below 10%. Put the kneaded carrier into a bell kiln, raise it from room temperature to 1280° C. over 33 hours, and calcinate at 1280° C. for 10 hours to obtain a white silver catalyst carrier. The measured carrier physical properties and pore structure distribution data are shown in Table 1 below.

Embodiment 3

[0072] The preparation method of the carrier is the same as in Example 1, except that 42.7g of tetrabutyl titanate is added, and the physical properties and pore structure distribution data of the obtained silver catalyst carrier are shown in Table 1 below; the preparation of the catalyst is the same as in Example 1, and the catalyst The results of the micro-reaction evaluation are shown in Table 2.

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Abstract

A preparation method for a silver catalyst carrier, comprising: 1) providing a solid mixture, the solid mixture comprising in 100 parts by weight: 50 to 500 meshes of trihydrate α-AlO3 20 to 90 parts by weight, and a particle size that can pass through a 200 mesh sieve Al2O35-70 parts by weight of false monohydrate, 0.05-7.0 parts by weight of fluoride mineralizer, 0.01-1.45 parts by weight of alkaline earth metal compound and 0.01-1.0 part by weight of silicon-containing compound; II) adding 0-3.5 parts by weight of titanium additive compound; III) adding 0.01-5.0 parts by weight of lubricating material to the mixture in step II); IV) adding a binder to the mixture in step III) for kneading and extruding; V) The product obtained in step IV) is dried and calcined to make the silver catalyst carrier. The invention also provides a silver catalyst carrier obtained by the method, a silver catalyst prepared from the silver catalyst carrier, and an application of the silver catalyst in ethylene epoxidation to produce ethylene oxide.

Description

technical field [0001] The invention relates to the field of silver catalysts for ethylene oxide production of ethylene oxide, in particular to a method for preparing a silver catalyst carrier, a silver catalyst carrier obtained by the preparation method, and a silver catalyst containing the silver catalyst carrier and its application . Background technique [0002] Under the action of silver catalyst, ethylene epoxidation mainly produces ethylene oxide (EO), and at the same time, side reactions produce carbon dioxide and water. Among them, activity, selectivity and stability are the main performance indicators of silver catalyst. Activity refers to the reaction temperature required when the ethylene oxide production process reaches a certain reaction load. The lower the reaction temperature, the higher the activity of the catalyst; the selectivity refers to the number of moles of ethylene converted into ethylene oxide and the amount of ethylene in the reaction. The ratio o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J23/68C07D301/10C07D303/04
CPCY02P20/52
Inventor 任冬梅孙欣欣林伟林强李贤丰王辉曹淑媛高立新
Owner CHINA PETROLEUM & CHEM CORP