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Liquid phase hydrogenation method of poly DCPD petroleum resin based on modified palladium family supported catalyst

A supported catalyst, petroleum resin technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of affecting the service life of catalysts, increasing energy consumption and cost Advanced problems, to achieve the effect of eliminating mass transfer limitations, increasing impurity capacity, and extending service life

Pending Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing technologies have certain effects, there are obvious deficiencies in practical operation, production cost and product stability, such as high cost of hydrodesulfurization, poor effect on colloid treatment; large material loss in adsorption method , solid waste is difficult to deal with, the combined process is complicated, and the cost is high
Due to the presence of some dicyclopentadiene (DCPD) in polydicyclopentadiene (polyDCPD) petroleum resin, they are easy to polymerize and coke during hydrogenation reaction, and the coke covers the surface of the catalyst and deposits in the pores, reducing the catalyst. The activity of the catalyst affects the service life of the catalyst
[0006] In the traditional trickle bed hydrogenation process, in order to control the reaction temperature and avoid carbon deposition and deactivation of the catalyst, the circulating hydrogen compressor is generally designed with a large hydrogen-oil ratio process, which not only increases the fixed investment but also increases the cost of the device. energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation steps of modified palladium series supported catalyst in the present embodiment are as follows:

[0031] First equipped with alumina (γ-Al 2 o 3 ) sol, which is coated on the surface of 80g spherical activated carbon by 7 dipping methods, each dipping time is 8min, the dipping temperature is normal temperature, and the pressure is normal pressure. After filtering, it is first dried at 40°C for 3h, and then in N 2 Calcined at 400°C for 6 hours in the atmosphere to obtain alumina (γ-Al 2 o 3 ) film-coated activated carbon support, alumina (γ-Al 2 o 3 ) and the weight ratio of activated carbon is 4:1;

[0032] Preparation concentration is the palladium nitrate aqueous solution of 0.7mol / L and the ammonium metatungstate solution that concentration is 0.8mol / L, adopts equal volume impregnation method then, the aluminum oxide (γ-Al 2 o 3 ) membrane-coated activated carbon support is immersed in palladium nitrate aqueous solution and ammonium metatungst...

Embodiment 2

[0037] The preparation steps of modified palladium series supported catalyst in the present embodiment are as follows:

[0038] First equipped with alumina (γ-Al 2 o 3 ) sol, which is coated on the surface of 80g spherical activated carbon by 9 dipping methods, each dipping time is 15min, the dipping temperature is normal temperature, and the pressure is normal pressure. After filtering, it is first dried at 45°C for 4h, and then in N 2 Calcined at 450°C for 5 hours in the atmosphere to obtain alumina (γ-Al 2 o 3 ) film-coated activated carbon support, alumina (γ-Al 2 o 3 ) and the weight ratio of activated carbon is 5:1;

[0039] Preparation concentration is the palladium nitrate aqueous solution of 0.6mol / L and concentration is the ammonium metatungstate solution of 0.5mol / L, adopts equal volume impregnation method then, the aluminum oxide (γ-Al 2 o 3 ) membrane-coated activated carbon support is immersed in palladium nitrate aqueous solution and ammonium metatungsta...

Embodiment 3

[0045] The preparation steps of modified palladium series supported catalyst in the present embodiment are as follows:

[0046] First equipped with alumina (γ-Al 2 o 3 ) sol, which is coated on the surface of 80g spherical activated carbon by 10 dipping methods, each dipping time is 13min, the dipping temperature is normal temperature, and the pressure is normal pressure. After filtering, it is first dried at 35°C for 5h. then in N 2 Calcined at 600°C for 6 hours in the atmosphere to obtain alumina (γ-Al 2 o3 ) film-coated activated carbon support, alumina (γ-Al 2 o 3 ) and activated carbon in a weight ratio of 6:1.

[0047] Prepare a palladium nitrate aqueous solution with a concentration of 0.8mol / L and an ammonium metatungstate solution with a concentration of 0.9mol / L, and then use an equal volume impregnation method to mix 100g of the above-prepared alumina (γ-Al 2 o 3 ) membrane-coated activated carbon support is immersed in palladium nitrate aqueous solution and ...

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Abstract

The invention discloses a liquid phase hydrofining method of poly DCPD petroleum resin based on a modified palladium family supported catalyst. According to the method, a two-step mode is adopted to meet the requirements of hydrofining of poly DCPD petroleum resin, and the method comprises the following steps of: 1, pretreatment process: removing colloids and organic sulfur in poly DCPD petroleumresin by adopting a fixed bed technology; and 2, liquid-phase hydrofining process: taking an obtained pretreated poly DCPD petroleum resin solution as a hydrogenation raw material, adopting a liquid-phase hydrogenation technology, and carrying out the liquid-phase hydrofining process on a fixed bed hydrogenation device. In the liquid-phase hydrogenation process, the modified palladium family supported catalyst is adopted as a catalyst. According to the invention, the required hydrogen is provided for the reaction in a liquid circulating material manner, no expensive hydrogen circulating compressor is needed to be arranged in the device, and the material passing through the reactor is a single liquid-phase material, so that the production cost is reduced, and the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of organic catalysis, and in particular relates to a liquid-phase hydrogenation method of polydicyclopentadiene (polyDCPD) petroleum resin based on a modified palladium series supported catalyst. Background technique [0002] Petroleum resin is widely used in coatings, adhesives, sealants, paper additives and other fields. With the continuous development of technology in various fields, the requirements for the quality of petroleum resin are getting higher and higher. The raw materials for preparing petroleum resin mainly come from petroleum cracking The by-products of ethylene / propylene production, due to the complex composition of cracking raw materials and the influence of the petroleum resin production process, there are double bonds or aromatic ring double bonds in the prepared petroleum resin, and contain impurities such as halides and sulfides. Some processes also have Gel formation leads to deep colo...

Claims

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Application Information

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IPC IPC(8): B01J23/652C08F240/00
CPCB01J23/6527C08F240/00
Inventor 常慧黄勇方玲叶军明陆鑫孙骏曹强
Owner CHINA PETROLEUM & CHEM CORP
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