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Hydrogenation catalyst, preparation method and application thereof, and method for selective hydrogenation of alkyne

A hydrogenation catalyst and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor selectivity and low catalyst activity, and achieve high performance Good, low precious metal content, excellent catalytic activity and selectivity effect

Pending Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of low catalyst activity and poor selectivity in the hydrogenation catalyst removal process in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] (1) Weigh 5 grams of alumina pellets and mix them with 30mL containing 0.3mol urea (CO(NH 2 ) 2 ) solution was mixed evenly, then transferred to a 500mL autoclave, and aged at 90°C for 12 hours.

[0067] (2) Then add Mg(NO 3 ) 2 ·6H 2 O aqueous solution, and warmed up to 120°C for 24 hours. Filtrate, take out the solid, rinse with deionized water three times, then dry in a drying oven (80°C) for 12 hours, and bake at 400°C for 6 hours to obtain modified alumina.

[0068] (3) The preparation concentration is PdCl 2 and CuCl 2 deionized mixed aqueous solution (the molar ratio of Pd to Cu is 1:2), ultrasonicated at 60°C for 2 hours, and the prepared modified alumina was impregnated with the mixed aqueous solution prepared above by the equal volume impregnation method, and placed in a drying oven , dried at 100°C for 10 hours and calcined at 400°C for 4 hours to obtain catalyst S1.

[0069] In the obtained catalyst, based on the total weight of the catalyst, the con...

Embodiment 2-9

[0072] Carry out according to the mode of embodiment 1, difference is,

[0073] The kind or consumption of the raw material that each embodiment adopts is different, and, the condition parameter of catalyst preparation is different, all the other are identical with embodiment 1, prepare catalyst S2, S3, S4, S5, S6, S7, S8, S9 respectively, specifically land,

[0074] Catalyst S2: the amount of raw materials used in Example 1 is different, the aging temperature is 80°C, the aging time is 15h, the first calcination temperature is 350°C, and the first calcination time is 8h.

[0075] In the obtained catalyst, based on the total weight of the catalyst, the content of palladium is 0.2wt%, the content of magnesium is 0.8wt%, and the molar ratio of palladium and copper is 2:1.

[0076] According to the evaluation method of the above-mentioned catalyst for the selective hydrogenation of isoprene to remove alkyne, it can be obtained that the total amount of remaining alkyne is 19 ppm,...

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PUM

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Abstract

The invention relates to the field of hydrogenation catalyst preparation, and discloses a hydrogenation catalyst, a preparation method and application thereof, and a method for selective hydrogenation of alkyne. The hydrogenation catalyst contains a carrier, an active component and an auxiliary active component, wherein the active component and the auxiliary active component are loaded on the carrier; the active component comprises palladium and copper; the auxiliary active component comprises magnesium and / or zinc; wherein on the basis of the total weight of the catalyst, the content of palladium is 0.1-10% by weight, the content of the auxiliary active component is 0.5-10% by weight in terms of metal elements, and the molar ratio of palladium to copper is 1: (0.1-15). The catalyst provided by the invention has excellent performance, especially shows excellent catalytic activity and selectivity in selective hydrogenation alkyne removal reaction in isoprene-containing cracked C5 raw materials, and is a novel catalyst with good performance.

Description

technical field [0001] The invention relates to the field of hydrogenation catalyst preparation, in particular to a hydrogenation catalyst, its preparation method and application, and a method for selectively hydrogenating alkynes. Background technique [0002] The cracked C5 fraction is a by-product produced during steam cracking of naphtha and other heavy cracking raw materials to ethylene. The components with high utilization value and high content are isoprene (IP), cyclopentadiene ( CPD) and piperylene, the three account for about 40-60% of the cracked C5 fraction. Among them, isoprene (IP) has a huge demand in the synthetic rubber and synthetic resin industries. The cracking C5 fraction separation process mainly includes the total separation process mainly for the separation of IP and the simple separation process for the separation of CPD. The total separation process generally uses solvents to separate IP, piperylene and CPD through extraction and distillation. Com...

Claims

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Application Information

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IPC IPC(8): B01J23/89C07C11/10C07C7/167
CPCB01J23/8946C07C7/167C07C11/10
Inventor 朱跃辉冯海强赵开径高继东
Owner CHINA PETROLEUM & CHEM CORP
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