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C3 fraction selective hydrogenation catalyst, preparation method and applications thereof

A selective hydrogenation and catalyst technology, applied in the direction of catalyst activation/preparation, hydrocarbons, chemical instruments and methods, etc., can solve the problems of unsatisfactory catalyst activity and selectivity, achieve mild experimental conditions and simple preparation methods , good stability

Active Publication Date: 2013-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activity and selectivity of the catalyst are still unsatisfactory

Method used

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  • C3 fraction selective hydrogenation catalyst, preparation method and applications thereof
  • C3 fraction selective hydrogenation catalyst, preparation method and applications thereof
  • C3 fraction selective hydrogenation catalyst, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 100mg / ml of Pd(NO 3 ) 2 Solution 2.17ml, diluted to 5ml with deionized water, 13.8ml Tween80 and 17.73ml isopropanol were mixed with 20ml cyclohexane under magnetic stirring in a constant temperature water bath at 25°C, and then Pd(NO 3 ) 2 Solution, magnetically stirred for a certain period of time until a transparent microemulsion was obtained; a certain amount of hydrazine hydrate was added to the above microemulsion to make the Pd(NO in the microemulsion 3 ) 2 Reduced to elemental Pd; weigh 100g Al 2 o 3 Carrier, impregnating the reduced microemulsion onto the carrier. Then it was dried and calcined to prepare the catalyst A, wherein the Pd content was 0.1wt%.

Embodiment 2

[0036] Weigh 200mg / ml of PdCl 2 Solution 1.23ml, dilute to 5ml with deionized water, mix 14.2ml TX-100 and 18.23ml n-butanol with 25ml n-octane in a constant temperature water bath at 25°C, and then add the metal salt solution diluted with water , magnetic stirring for a certain period of time until a transparent microemulsion is obtained; a certain amount of hydrazine hydrate is added to the above microemulsion to make the PdCl in the microemulsion 2 Reduced to elemental Pd; weigh 100g TiO 2 Carrier, impregnating the reduced microemulsion onto the carrier. Then it was dried and calcined to prepare the catalyst B, wherein the Pd content was 0.15wt%.

Embodiment 3

[0038] Weigh 200mg / ml of Pd(NO 3 )2 Solution 1.62ml, 300mg / ml AgNO 3 Solution 1.57ml was diluted to 5ml with deionized water. Mix 10ml NP-10 and 5ml n-pentanol with 30ml cyclohexane in a constant temperature water bath at 20°C under magnetic stirring, then add metal salt solution diluted with water, stir magnetically for a certain period of time until a transparent microemulsion is obtained, and add to the above microemulsion A certain amount of potassium borohydride is added to the emulsion to reduce the metal ions in the metal salt solution in the microemulsion to a simple state. Weigh 100gAl 2 o 3 Carrier, the reduced microemulsion is sprayed on the carrier, then dried and calcined to prepare the catalyst C. Wherein the Pd content is 0.15wt%. Wherein the Ag content is 0.3wt%.

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Abstract

The present invention provides a C3 fraction selective hydrogenation catalyst, a preparation method and applications thereof. According to the present invention, active components of the catalyst are prepared through a microemulsion method, and are loaded on a carrier, and the prepared main active component Pd of the catalyst has characteristics of small particle size, controllable particle size, and good dispersion, wherein the particle size is less than 10 nm; the catalyst preparation method has characteristics of simpleness, easy operation, and mile preparation conditions; and with application of the catalyst in selective hydrogenation reactions of propyne and allene in cracking product C3 fractions, high activity and high selectivity are provided.

Description

technical field [0001] The invention belongs to a catalyst for the selective hydrogenation of C3 fractions and its preparation method and application, in particular to a support for the selective hydrogenation of propyne and propadiene in the C3 fractions of cracking products prepared by microemulsion method to generate propylene Type selective hydrogenation catalyst and its preparation method and application. Background technique [0002] After cracking and separation, petroleum hydrocarbons contain propylene, propane, and a small amount of propyne and propadiene (MAPD for short), and propyne and propadiene are about 1% to 5% (volume content) in the carbon three fraction. Since the impurity MAPD will reduce the activity of the polypropylene catalyst and affect the quality of the polymerization product, it is necessary to remove the content of MAPD to a certain level. At present, the deacetylation method widely used in industry is catalytic selective hydrogenation. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J23/50B01J23/89B01J23/52B01J23/68B01J37/00B82Y40/00C07C11/06C07C7/163C07C7/167
CPCY02P20/52
Inventor 戴伟卫国宾杨思源彭晖穆玮乐毅
Owner CHINA PETROLEUM & CHEM CORP
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