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C3-fraction liquid phase selective hydrogenation catalyst as well as preparation method and application thereof

A selective hydrogenation and catalyst technology, applied in hydrogenation hydrocarbon production, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of complex system, many control and influencing factors, etc. Uniform composition, narrow particle size distribution, and good dispersion

Active Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Traditionally, the microemulsion system is composed of water phase, oil phase, surfactant and co-surfactant, the system is relatively complex, and there are many controlling and influencing factors

Method used

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  • C3-fraction liquid phase selective hydrogenation catalyst as well as preparation method and application thereof
  • C3-fraction liquid phase selective hydrogenation catalyst as well as preparation method and application thereof
  • C3-fraction liquid phase selective hydrogenation catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]① Pipette 40mgPd / ml[Pd(NH 3 ) 4 ](NO 3 ) 2 Solution 5ml, 100mgAg / ml [Ag(NH 3 ) 4 ]NO 3 Solution 6ml, weigh 1500mg of polyvinylpyrrolidone (PVP), dilute to 15g with deionized aqueous solution;

[0036] ②In a constant temperature water bath at 70°C, add 10g of non-ionic surfactant Brij35 and 10g of oil phase isooctane in a 100ml volumetric flask, stir for 4 hours by magnetic force, then add ① into ② and stir for 30 minutes to obtain a W / O microemulsion ;

[0037] 3. add reducing agent hydrazine hydrate, add in the microemulsion according to the mol ratio of metal salt and reducing agent in the water phase as 1:4, carry out reduction reaction, react for 4 hours;

[0038] ④ Weigh spherical SiO 2 Carrier 100g, impregnated with the microemulsion prepared above;

[0039] ⑤ Dry and roast the carrier impregnated with the above-mentioned microemulsion to prepare the catalyst, and obtain the catalyst GB-1, wherein the Pd-Ag alloy content is 0.8% of the total mass, and the ...

Embodiment 2

[0041] ① Pipette 10mgPd / ml[(NH 4 ) 2 Pd]Cl 4 Solution 5ml, 20mgAg / ml HAuCl 4 Solution 2.5ml, weigh 400mg polyacrylamide (PAM), dilute to 20g with deionized aqueous solution;

[0042] ②In a constant temperature water bath at 60°C, add 5g of anionic surfactant AOT, 6g of nonionic surfactant Brij72, and 15g of oil phase n-octane in a 100ml volumetric flask, stir magnetically for 2h, then add ① into ② and stir for 1h to obtain W / O microemulsion;

[0043] 3. add reducing agent sodium borohydride, add in the molar ratio of metal salt and reducing agent according to the water phase as 1:8, carry out reduction reaction, react for 8 hours;

[0044] ④ Weigh spherical TiO 2 Carrier 100g, impregnated with the microemulsion prepared above;

[0045] ⑤ Dried and calcined the carrier impregnated with the above-mentioned microemulsion to prepare the catalyst, and obtained the catalyst GB-2, wherein the Pd-Au alloy content was 0.1% of the total mass, and the mass ratio of Pd:Au was 1:1 ....

Embodiment 3

[0047] ① Pipette 20mgPd / mlK 2 [Pd(CN) 4 ] solution 5ml, 300mgAg / mlKAgCN 2 0.5ml of aqueous solution, weigh 120mg of PVP, and dilute to 12g with deionized aqueous solution;

[0048] ②In a constant temperature water bath at 45°C, in a 100ml volumetric flask, add 10g of non-ionic surfactant Brij30, 12g of oil phase n-nonane, and magnetically stir for 4h, then add ① into ② and stir for 20min to obtain a W / O microemulsion;

[0049] ③Add reducing agent hydrazine hydrate, add in the microemulsion according to the molar ratio of metal salt and reducing agent in the water phase as 1:8, carry out reduction reaction, and react for 1 hour;

[0050] ④ Weigh columnar Al 2 o 3 Carrier 100g, impregnated with the microemulsion prepared above;

[0051] ⑤ Dried the carrier impregnated with the above microemulsion in ④ at 110°C for 12 hours, and roasted at high temperature to prepare the catalyst. The obtained catalyst GB-3, wherein the Pd-Ag alloy content was 0.25% of the total mass, Pd:Ag ...

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Abstract

The invention discloses a C3-fraction liquid phase selective hydrogenation catalyst, wherein a nano precious metal alloy active component is loaded on a carrier; the nano precious metal alloy active component comprises nanoscale alloy particles; the nano precious metal alloy active component is Pd-X, wherein the metal X is one out of Ag, Au and Cu, and the mass ratio of the alloy components Pd to X is equal to 1 to (0.2-5); the content of the nano precious metal alloy is 0.2-1.0wt% of the total mass of the carrier; the nano precious metal alloy active component is prepared by putting a bimetallic complex into a micro-emulsion system modified by a water-soluble high-molecular polymer by adopting a chemical reduction method, and loading the product onto the carrier. When being applied to a selective hydrogenation reaction of allylene and allene, the C3-fraction liquid phase selective hydrogenation catalyst has higher activity and selectivity.

Description

technical field [0001] The present invention relates to a liquid-phase selective hydrogenation catalyst for carbon three fractions and its preparation method and application, in particular to a supported nano-alloy selective hydrogenation catalyst and its preparation method, the catalyst is used in the cracking product carbon three fractions Liquid-phase selective hydrogenation of propyne and propadiene to propylene. Background technique [0002] After steam cracking and separation of liquid hydrocarbon raw materials such as naphtha, the C3 fraction contains propylene, propane, and a small amount of propyne and propadiene (MAPD for short), and the content of MAPD is about 1% to 5% (volume) . In propylene polymerization, MAPD will reduce the activity of polypropylene catalyst and affect the quality of polymerization grade propylene products. Therefore, MAPD must be removed from the C3 fraction. At present, catalytic selective hydrogenation is mostly used in industry to remo...

Claims

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Application Information

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IPC IPC(8): B01J23/50B01J23/52B01J23/89C07C11/06C07C5/05C07C5/09
CPCY02P20/52
Inventor 卫国宾戴伟彭晖李前石瑞红
Owner CHINA PETROLEUM & CHEM CORP
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