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A kind of hydrogenation catalyst and its preparation method and application

A hydrogenation catalyst and catalyst technology, applied in the field of hydrogenation saturation method of C4 olefins, can solve the problems of complex catalyst preparation process, low space velocity of hydrogenation reaction liquid, low catalyst activity, etc., and achieve high hydrogenation saturation activity and stability Good running time and anti-sulfur toxicity

Active Publication Date: 2018-09-21
BEIJING GAOXIN LIHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low specific surface area of ​​the catalyst leads to low catalyst activity. Therefore, when dealing with pyrolysis gasoline, the colloid is easy to adhere to the catalyst, which is easy to coke, and the catalyst life is short
[0005] CN200810238973.3 discloses a hydrogenation catalyst with alumina as the carrier and the active component as noble metal palladium. One or more of the additives B, P, Si and Ag, Pb, Au, Co, Cu, One or more of Bi, Ni, Pt, Ti, adding alkali metal and / or alkaline earth metal at the same time, the catalyst is suitable for the by-product C in catalytic cracking process and steam cracking ethylene process 4 The hydrogenation of distillates is saturated, but therefore catalyst preparation process is comparatively complicated, and cost is also higher, is very easy to be poisoned as noble metal catalyst simultaneously, and the liquid space velocity of hydrogenation reaction is also low (0.5~3.0h -1 )

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Prepare a toothed spherical alumina carrier, whose properties are as follows: the specific surface area is 240m 2 / g, the pore volume is 0.45mL / g;

[0042] (2) Preparation of impregnating liquids, wherein the first impregnating liquid is an impregnating liquid containing nickel, tungsten and lanthanum, and the second impregnating liquid is an impregnating liquid containing nickel, molybdenum and lanthanum; in the two impregnating liquids, the amount of nickel The molar ratio between the shell layer and the core layer of the catalyst is 6:4; the amount of lanthanum makes the molar ratio between the shell layer and the core layer of the catalyst 6:4;

[0043] (3) Put the carrier prepared in step (1) into a vacuum filter bottle, add the first impregnating liquid prepared in step (2), the amount of the first impregnating liquid is the volume of impregnating liquid used in saturated impregnation 0.6, vacuum filtration, suction filtration pressure 0.09MPa, suction filtra...

Embodiment 2

[0047] Catalyst B was prepared in this example.

[0048] The preparation of catalyst B is the same as in Example 1, except that the first impregnating solution is an impregnating solution containing nickel, tungsten and scandium, and the second impregnating solution is an impregnating solution containing nickel, molybdenum and scandium; Among them, the amount of nickel is used so that the molar ratio between the shell layer and the core layer of the catalyst is 5.5:4.5; the amount of scandium is used so that the molar ratio between the shell layer and the core layer of the catalyst is 5.5:4.5.

[0049] In catalyst B, the content of molybdenum oxide is 15 wt%, the content of tungsten oxide is 8 wt%, the content of nickel oxide is 3 wt%, and the content of scandium oxide is 0.9 wt%. The catalyst was used in the hydrogenation reaction of liquefied petroleum gas. After 200 hours of reaction, the product composition was analyzed by sampling. The operating conditions and reaction re...

Embodiment 3

[0051] Catalyst C was prepared in this example.

[0052] The preparation of catalyst C is the same as in Example 1, difference: the first impregnating liquid is the impregnating liquid containing nickel, tungsten and cerium, and the second impregnating liquid is the impregnating liquid containing nickel, molybdenum and cerium; Among them, the amount of nickel is used so that the molar ratio between the shell layer and the core layer of the catalyst is 6.5:3.5; the amount of cerium is used so that the molar ratio between the shell layer and the core layer of the catalyst is 6:4.

[0053] In catalyst C, the content of molybdenum oxide is 12 wt%, the content of tungsten oxide is 5 wt%, the content of nickel oxide is 3 wt%, and the content of additive cerium oxide is 1.0 wt%. The catalyst was used in the hydrogenation reaction of liquefied petroleum gas. After 200 hours of reaction, the product composition was analyzed by sampling. The operating conditions and reaction results are...

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PUM

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Abstract

The invention discloses a hydrogenation catalyst, a preparation method of the hydrogenation catalyst and application of the hydrogenation catalyst. The hydrogenation catalyst comprises a carrier and active metal components, wherein the carrier is an alumina-based carrier; the active metal components comprise tungsten, molybdenum and nickel; the active metal components are arranged hierarchically; Ni and Mo are arranged as a shell layer; Ni and W are arranged as a kernel layer. The hydrogenation catalyst disclosed by the invention has the advantages that the features of high activity, good stability, good sulfur tolerance and the like are obtained; when the catalyst is applied to a low-carbon olefin hydrogenation reaction, the treatment capacity of equipment is large, and the running period is long; the hydrogenation catalyst is especially suitable for hydrogenation saturation reactions of olefins with less than 8 carbon atoms.

Description

technical field [0001] The present invention relates to a kind of hydrogenation catalyst and its preparation method and application, specifically a kind of hydrogenation catalyst used in C 8 The following catalysts for olefin hydrogenation saturation and their preparation methods and applications are especially suitable for C 4 Hydrosaturation of olefins. Background technique [0002] With the development of the oil refining industry in various countries in the world, especially the continuous improvement of catalytic cracking technology, the proportion of secondary processing equipment in the crude oil processing process is increasing, and the refinery gas resources are also more abundant. Deep processing has gradually attracted people's attention. C 4 Problems of excess fractions and low utilization. Current refinery by-product C 4 Except for a small amount of high-octane gasoline blending components produced through etherification and alkylation, most of the rest ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888C07C5/03C07C7/163C07C9/10
CPCB01J23/002B01J23/888B01J37/0205B01J2523/00C07C5/03C07C7/163C07C2523/888B01J2523/31B01J2523/3706B01J2523/68B01J2523/69B01J2523/847B01J2523/35B01J2523/3712C07C9/10
Inventor 宋兆伟杨大奎张谦温王春阳魏涛吴闯
Owner BEIJING GAOXIN LIHUA TECH CO LTD