A preparation of tio by titanium-based binder 2 Method for forming catalyst support

A technology of catalyst carrier and binder, which is applied in the field of preparation of catalyst molding carrier, can solve the problems of easy powder falling, large specific surface area, low purity, etc., and achieve the effects of solving pollution problems, improving powder falling problems, and increasing strength

Active Publication Date: 2021-05-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For TiO in the prior art 2 Due to the low purity of the forming carrier, the powder is easy to fall off, and the strength and specific surface area are not compatible. 2 Preparation method of shaped carrier

Method used

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  • A preparation of tio by titanium-based binder <sub>2</sub> Method for forming catalyst support

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 60g of titanyl sulfate into 600ml of water, and dissolve it at 80°C to obtain a clear and transparent solution. Add 340g of metatitanic acid to the solution, stir vigorously for 40 minutes, then transfer the mixture to a tetrafluoroethylene-lined hydrothermal reactor, and react at 120°C for 4 hours under autogenous pressure. Quench with water, cool down to room temperature with NH 3 ·H 2 Adjust the PH value of the mixed solution to about 7 and form a gel. The colloid is subjected to solid-liquid separation by suction filtration to obtain a colloidal filter cake, and the colloidal filter cake is washed repeatedly with deionized water until no sulfate ion is detected in the washing liquid. Place the washed colloidal filter cake in a microwave oven for heating and dehydration, adjust the microwave power to 800W, and heat for a total of 40 minutes, divided into 8 times, 5 minutes each time, with an interval of 3 minutes between adjacent two times, to obtain solid cont...

Embodiment 2

[0037] Add 70g of titanium tetrachloride to 400ml of water at room temperature, then add 360g of nano-TiO 2 , after vigorous stirring, the mixture was transferred to a tetrafluoroethylene-lined hydrothermal reactor and reacted at 150°C for 4 hours under autogenous pressure. Quench with water, cool down to room temperature with NH 3 ·H 2 O Adjust the PH value of the mixture to about 5 and form a gel. The solid-liquid separation of the colloid is carried out by suction filtration to obtain a colloidal filter cake, and the colloidal filter cake is repeatedly washed with deionized water until chloride ions are detected in the washing liquid. Place the washed colloidal filter cake in a microwave oven for heating and dehydration, adjust the microwave power to 800W, and heat for a total of 40 minutes, divided into 8 times, 5 minutes each time, with an interval of 3 minutes between adjacent two times, to obtain solid content A cement-like dough with a rate of 70%. The clay-like do...

Embodiment 3

[0039] Add 30g of titanyl sulfate into 300ml of water, and dissolve it at 80°C to obtain a clear and transparent solution. Add 370g nano TiO to the solution 2 After stirring vigorously for 40 minutes, the mixture was transferred to a tetrafluoroethylene-lined hydrothermal reactor and reacted at 180°C for 4 hours under autogenous pressure. Quench with water, cool down to room temperature with NH 3 ·H 2 Adjust the PH value of the mixed solution to about 3 and form a gel. The colloid is subjected to solid-liquid separation by suction filtration to obtain a colloidal filter cake, and the colloidal filter cake is washed repeatedly with deionized water until no sulfate ion is detected in the washing liquid. Place the washed colloidal filter cake in a microwave oven for heating and dehydration, adjust the microwave power to 800W, and heat for 40 minutes in total, divided into 8 times, 5 minutes each time, with an interval of 3 minutes between adjacent two times, to obtain solid co...

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Abstract

The invention provides a method for preparing high-purity TiO2 by titanium-based binder 2 The method for forming a catalyst carrier comprises the following steps: (1) hydrothermally treating the mixture of a Ti-based binder solution and a titanium-based molding powder; (2) adding a gelling agent to make it into a viscous emulsion, washing and filtering to obtain a slurry filter cake; (3) adjusting the water content of the filter cake by microwave heating to obtain a clay-like dough; (4) kneading, extruding, and roasting the clay-like dough to obtain TiO 2 Shaped catalyst support. This method increases the bonding effect of the titanium-based binder through hydrothermal treatment, and promotes the uniform distribution of the binder through microwave dehydration, and the prepared TiO 2 The molding carrier has the characteristics of high purity, large specific surface area, high strength, good wear resistance, and no powder falling. It can be used in harsh reaction systems such as strong acid, strong alkali, and strong hydrothermal. TiO in molding support 2 Content ≥ 99wt%, crystal form is anatase or / and rutile, axial compressive strength ≥ 8MPa, specific surface area ≥ 70m 2 / g, average pore size 10‑60nm.

Description

technical field [0001] The invention relates to a preparation method and process for a catalyst shaped carrier, in particular to a method for preparing a TiO2 shaped catalyst carrier from a titanium-based binder. Background technique [0002] About 85% of the chemicals provided by modern chemical processes are produced by catalytic processes. Catalysts are the core of catalytic technology and play a pivotal role in the development of catalytic technology. Catalysts are generally composed of active components and carriers, and the active components are highly dispersed in the carrier. The carrier is the skeleton of the active component of the catalyst. The stability of its physical and chemical properties such as shape, strength, specific surface area, and pore structure in the catalytic reaction system determines the service life and economic value of the catalyst. With the development of modern catalytic technology and the continuous expansion of the scope of application, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J32/00B01J37/08B01J37/10B01J37/34
Inventor 吴合进赵许群王晓东张涛王晖
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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