Alumina supporter containing flurine and its preparing process

A technology of alumina carrier and alumina, which is applied in the direction of catalyst carrier, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of fluorine loss, environmental pollution, fluorine loss and corrosion of downstream equipment, etc., and achieve the effect of not easy loss

Inactive Publication Date: 2003-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

All of the above patents use fluorine as an additive, but none of them involves the loss of fluorine. The loss of fluorine will produce the following adverse results: ①The reduction of fluorine content will cause the activity of the catalyst to decrease, ②The lost fluorine will corrode downstream equipment, ③The loss The fluorine is taken out with the product and pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation process of the carrier is described by extruding as an example.

[0037] Take 8.5ml of silica sol (SiO 2 30m%), 10g of ammonium fluorosilicate and 80ml of water to prepare a solution; mix 100g of aluminum hydroxide dry powder, 10g of carbon black, and 5.0g of squid powder evenly, add the above solution and knead into a uniform plastic body, and extrude into a 1.2mm The clover-shaped strips were dried at 120°C for 4 hours and calcined at 600°C for 4 hours to obtain fluorine-containing alumina carrier A. The experimental results and carrier properties are shown in Table 1.

[0038] Take 8.0g of ammonium fluorosilicate, 1.0ml of acetic acid solution (36%), and 85ml of water to prepare a fluorine-containing solution; mix 100g of aluminum hydroxide dry powder, 10g of carbon black, and 5.0g of squash powder, and then add 7.0ml of silica sol to mix Uniform, then add the above fluorine-containing solution to knead into a uniform plastic body, extrude into a cl...

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Abstract

The fluoride bearing alumina carrier consists of (accounting in the weight of catalyst): fluorine 0.5-15 wt%, assistant M 1.0-30 wt% and alunina the rest. Fluorine and assistant M are added during forming the alumina carrier in kneading mode. The said process can prepare carrier with F and M contents and F / M ratio adjustable within certain range and physical and chemical properties adjustable within certain range. The carrier can meet the requirement for various hydrogenating catalyst and features less loss of F inside the carrier.

Description

1. Technical field [0001] The invention relates to a fluorine-containing alumina carrier and a preparation method thereof, in particular to a fluorine-containing alumina carrier used for preparing a hydrogenation catalyst and a preparation method thereof. 2. Background technology [0002] Alumina is a commonly used industrial catalyst carrier and has been widely used in the preparation of industrial catalysts. However, due to some weaknesses in the alumina carrier, such as: weak acidity, mainly L acid (Lewise acid), B acid (Brōnsted acid) is very weak; it is easy to strongly interact with hydrogenation active components to form inactive Species (such as easy to form nickel-aluminum spinel with nickel), simple use of alumina as a catalyst carrier is prone to sintering of active components or supports, which affects the activity and stability of the catalyst and many other shortcomings. [0003] Pure alumina has the disadvantages mentioned above, and more specific requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/125B01J32/00
Inventor 向绍基李亚昆苏晓波袁胜华段日
Owner CHINA PETROLEUM & CHEM CORP
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