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A kind of hydrogenation method of diene

A diene, hydrogenation reaction technology, applied in the field of diene hydrogenation, can solve the problems of easy deactivation, short operation cycle, poor impurity resistance of the catalyst, etc., achieve good reaction performance, less loss of monoolefin, and reduce olefin The effect of aggregation

Active Publication Date: 2018-04-20
五家渠市三江新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the researched and developed diene hydrogenation method has better operation performance and a longer industrial application cycle when the raw material mono-olefin content is less than 15% for hydrogenation of low-carbon hydrocarbons, but when the content of low-carbon hydrocarbons is greater than 2% When the total olefin content is greater than 8%, the catalyst has poor resistance to impurities, is easy to deactivate, and has a short operating cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Dissolve 1.2kg of zinc nitrate in 6L of water to make a solution containing zinc, and dissolve 0.24kg of sodium metaaluminate and 0.30kg of sodium carbonate in 4L of water to make a solution containing aluminum. Divide the zinc-containing solution into 3 equal parts, each 2L. Take 2L of zinc-containing solution, keep the temperature at 80°C, add aluminum-containing mixed solution dropwise to it until the pH value reaches 9.0; stop dropping the aluminum-containing mixed solution, then add 2L of zinc-containing solution dropwise to the mixing system, and continue to drop aluminum-containing solution Mix the solution until the pH value reaches 9.0; titrate the aluminum-containing mixed solution and the zinc-containing solution alternately until all the zinc-containing solutions are added, and add the aluminum-containing mixed solution dropwise until the pH reaches 9.0. The total titration time is 3 hours. The obtained mixture was aged at 80°C for 4h, cooled and washed unti...

Embodiment 2

[0053] The preparation method and steps of the composite carrier containing zinc oxide-alumina are the same as in Example 1, and the zinc oxide containing zinc-aluminum spinel is prepared, and the pH value is adjusted to 8.7. In terms of oxides, the content of zinc oxide is 70%; the specific surface area is 191m 2 / g.

[0054] The composite carrier includes 30wt% of zinc oxide containing zinc-aluminum spinel, 68wt% of alumina, and the contents of phosphorus, potassium and magnesium in the auxiliary components are P 2 o 5 0.6wt%, K 2 O 0.8wt%, MgO 0.6wt%.

[0055] The difference is that after the composite carrier is obtained, the composite carrier containing zinc oxide-alumina is modified by using potassium and magnesium. 1.2g, 10.7g of magnesium nitrate, completely dissolved in 30ml of distilled water, then diluted with deionized water to form a solution sprayed with a composite carrier of zinc oxide-alumina, dried and roasted to obtain surface-modified with additives po...

Embodiment 3

[0060] The preparation method and steps of the composite carrier containing zinc oxide-alumina are the same as in Example 1. Zinc oxide containing zinc aluminum spinel was prepared, and the pH value was adjusted to 9.3. Zinc oxide containing zinc aluminum spinel, calculated as oxide, the content of zinc oxide is 63%; the specific surface area is 214m 2 / g.

[0061] The composite carrier includes 18.3wt% of zinc oxide containing zinc-aluminum spinel, 79wt% of alumina, and the contents of phosphorus, potassium and magnesium in the auxiliary components are P 2 o 5 0.9wt%, K 2 O 0.8wt%, MgO 1.0wt%. Composite carrier specific surface area 242m 2 / g.

[0062] Take palladium chloride, chloroauric acid and lanthanum nitrate and add them to 30ml of distilled water, add ammonia water to adjust the pH value to 3.0, then dilute with deionized water, make an impregnation solution to impregnate 100g of spherical zinc oxide-alumina composite carriers, The obtained catalyst precursor ...

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Abstract

The invention discloses a diene hydrogenation method adopting a fixed-bed reactor. The catalyst is a palladium-based supported catalyst, the reaction technology conditions are as follows: the reaction temperature is 20-90DEG C, the reaction pressure at 1.0-4.0MPa, the mass ratio of hydrogen to diene is 1.0-3.0, and the volume space velocity is 1.0-10.0h<-1>. The hydrogenation reaction technology are mild in conditions, the hydrogenation saturation rate of monoolefine is low under high diene conversion rate, the loss rate of noble metal active centers of the catalyst is low, and the activity stability is good.

Description

technical field [0001] The invention relates to a method for hydrogenation of diolefins, more specifically, a catalyst for hydrogenation of diolefins with a zinc oxide-alumina composite material as a carrier is used for the hydrogenation reaction of diolefins. Background technique [0002] With the development of oil refining industry at home and abroad, secondary processing units account for an increasing proportion in the crude oil processing process, especially with the continuous development of ethylene cracking and catalytic cracking technology and the continuous deterioration of raw material quality, refineries and ethylene plants C4 The -C8 resource becomes more abundant, and the deep processing of low-carbon hydrocarbons is gradually paid attention to. Many refining and chemical integration enterprises in my country generally have the problem of excess C4-C8 fractions and low utilization rate. At present, except for a small amount of C4 produced by refineries throug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/34C10G45/40B01J27/185B01J35/10
CPCB01J27/1856B01J35/1019C10G45/34C10G45/40C10G2300/1088
Inventor 罗祥生石海信韦金广
Owner 五家渠市三江新能源科技有限公司
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