Catalytic hydrogenation method for olefin

A technology for catalytic hydrogenation and olefins, which is applied in the fields of hydrogenation to hydrocarbons, organic chemistry, and refined hydrocarbon oils. It can solve the problems of inconvenient heat extraction and additional separation steps, and achieve the goals of reducing energy consumption, simplifying the process flow, and saving production costs. Effect

Active Publication Date: 2008-07-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the shortcomings of the existing olefin catalytic hydrogenation method that requires additional separation steps and inconvenient heat extraction, and provide a method for olefin catalytic hydrogenation that reacts and separates simultaneously and uses the heat of reaction directly for product distillation

Method used

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  • Catalytic hydrogenation method for olefin

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Experimental program
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Effect test

preparation example Construction

[0026] The preparation method of the catalyst used in the present invention is simple, and it can be prepared only after uniformly mixing the above-mentioned main catalyst, co-catalyst, regulator and solvent. Generally speaking, when preparing the catalyst, the main catalyst and the co-catalyst are prepared into solutions with the selected solvent respectively, then the two are mixed, and the regulator is added. The order in which the components are added has little effect on the performance of the final catalyst, but catalyst preparation generally needs to be carried out under the protection of an anhydrous and oxygen-free inert atmosphere. The specific preparation method and conditions are similar to those of Ziegler-Natta catalysts known to those skilled in the art.

[0027] The method provided by the present invention can be applied to the hydrogenation reaction of various olefins, for example, the olefins can be olefins with double bonds at the terminal positions. Since ...

Embodiment 1

[0034] This example is used to illustrate the olefin hydrogenation method provided by the present invention.

[0035] Such as figure 1 As shown, the reactor is connected up and down by connecting a stainless steel reactor 1 with a volume of 2 liters and a diameter of Φ150 mm with a magnetically coupled stirring device with a stainless steel sieve tray tower 2 with a diameter of Φ50 mm and 28 plates. The top of the sieve tray column 2 is connected with a cooler 3 and a reflux tank 4 to obtain. The stainless steel reaction kettle 1 communicates with a settling separator 5 with a volume of 2 liters. C containing 150 μg / g Zigler-Natta-type nickel-based catalyst 4 Composite olefin enters the stainless steel sieve tray tower 2 from the 14th tray (with the first one near the cooler end as the first tray) at a speed of 2000 g / h, and is still separated from the 14th tray after separating the heavy product from the bottom of the tower. Each tray (with the uppermost one near the coole...

Embodiment 2

[0039] This example is used to illustrate the olefin hydrogenation method provided by the present invention.

[0040] Carry out C according to the method for embodiment 1 4 For the hydrogenation test of superimposed olefins, the difference is that 150 grams of amorphous nickel alloy catalyst (produced by Sinopec Jianchang Catalyst Branch Company, model SRNY-4) with a particle diameter of 50-150 microns is added to stainless steel reactor 1 middle. C after the stable operation of the reaction system 4 The flow rate and composition of superimposed olefin feedstock, hydrogenated light fraction and hydrogenated heavy fraction are shown in Table 2.

[0041] Table 2

[0042] C 4 Aligned Olefin Feedstock

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Abstract

The invention relates to a catalytic hydrogenation method of alkene. Under the conditions of alkene hydrogenation and the existence of hydrogenation catalysts, the alkene is reacted with hydrogen in contact way in a reactor; wherein, the reactor comprises a reacting tower and a reacting vessel, and the reacting tower and the reacting vessel are communicated with each other; the reaction tower is positioned above the reacting vessel; the hydrogen is sent into the reacting vessel from the bottom of the reacting vessel; the alkene is sent into from the middle-upper part of the reacting tower and/or the reacting vessel and contacts hydrogen in a countercurrent way; during the hydrogenation, the production separation is carried out; the light fraction exacted from the reacting tower after hydrogenation and the heavy fraction left on bottom of the reacting vessel after hydrogenation are reclaimed. The method of the invention saves the separation step and separation equipment of the ordinary alkene hydrogenation, thus greatly simplifying technology process. Besides, by directly applying reaction heat to separation of products, the energy consumption is decreased. In addition, the catalysis is carried out by taking the way of suspending and dispersing the hydrogenation catalyst into the reaction compound containing hydrogen and alkene so as to greatly improve catalysis effect and efficiency.

Description

technical field [0001] The invention relates to a catalytic hydrogenation method, in particular to a catalytic hydrogenation method of olefins. Background technique [0002] by C 2 -C 5 C obtained from alkenes by superimposition or oligomerization 4 -C 30 Alkenes can be directly used as chemical raw materials, and the alkanes obtained by hydrogenation saturation can be used as gasoline and diesel components or as organic solvents. Especially in recent years, with the increasingly stringent environmental protection regulations, the requirements for the content of olefins in gasoline have been continuously increased, and the market demand for isoparaffins has increased sharply. The technical route of producing isoparaffins as gasoline high-octane components has been highly valued at home and abroad. In the oil refining industry, this new route for producing isoparaffins is called "indirect alkylation" technology. [0003] As an important step in the "indirect alkylation" ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/02C07C5/02C10G45/00
Inventor 温朗友俞芳赵福军闵恩泽管炳伟喻惠利时昭
Owner CHINA PETROLEUM & CHEM CORP
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