Preparation method for hydrogenation catalyst

A hydrogenation catalyst, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Activity and stability need to be further improved to achieve the effect of easy reduction and improved comprehensive performance

Active Publication Date: 2015-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the preparation of the catalyst are as follows: firstly, during the precipitation process, the acidic nickel salt solution is added to the alkaline precipitant solution, which causes the environment of the precipitation process in the reactor to be inhomogeneous, resulting in the different sizes of the precipitated grains, affecting The activity level of nickel is exerted to reduce the activity of the catalyst; secondly, after the precipitation is completed, the alumina carrier is added. This process belongs to the mixing of two solid substances, which is not conducive to the dispersion of nickel and reduces the utilization rate of active metals.
The activity and stability of the catalyst prepared by this method need to be further improved

Method used

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  • Preparation method for hydrogenation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Get 242.5g of nickel chloride hexahydrate and 14.9g of lanthanum nitrate hexahydrate to prepare a mixed solution, so that the concentration of the two salts in this solution is 0.7mol / L. After the two salts are completely dissolved, add pseudo-both aluminum stone (containing Al 2 o 3 70% (mass fraction)) 288.1g, made into slurry I, heated to 75°C for use;

[0031] (2) Take 114.1g nickel chloride hexahydrate and prepare 2000mL solution II, heat to 75°C, and set aside;

[0032] (3) At 75°C, add 500mL of bottom water to the reaction tank, co-precipitate the slurry I and the precipitating agent sodium carbonate (concentration: 1.0mol / L), and keep the pH value of the precipitation system at 7.8. After continuing to stir at constant temperature for 30 minutes, filter;

[0033] (4) Add the obtained filter cake to solution II, stir, keep the system temperature at 80°C, and add ammonium carbonate solution (concentration: 0.5 mol / L) dropwise to the slurry, and stop the dro...

Embodiment 2

[0037] Other conditions are the same as in Example 1, except that the precipitating agent of the co-precipitation reaction is changed to sodium hydroxide solution, and the concentration is changed to 1.2 mol / L, and hydrogenation catalyst A3 is prepared, and its properties are shown in Table 1.

Embodiment 3

[0039] Other conditions were the same as in Example 1, except that the carrier pseudo-boehmite was changed to silica (powder greater than 150 mesh), and hydrogenation catalyst A3 was prepared, and its properties are shown in Table 1.

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Abstract

The invention discloses a preparation method for a hydrogenation catalyst. The catalyst is a nickel catalyst. The preparation method for the hydrogenation catalyst comprises the following step: preparing slurry from a part of active metal nickel, an auxiliary agent and a carrier and subjecting the slurry and a precipitating agent to parallel-flow precipitation; then adding a filter cake obtained after filtration into a solution prepared from rest active metal nickel and dropwise adding an alkaline solution; successively carrying out aging, washing and drying; and carrying out molding, drying and roasting so as to prepare the hydrogenation catalyst. The catalyst prepared by using the method is particularly applicable to hydro-decolorization of C5 petroleum resin, C9 petroleum resin and blended C5 and C9 petroleum resin and has the advantages of good activity, high selectivity and good stability.

Description

technical field [0001] The present invention relates to a kind of preparation method of hydrogenation catalyst, and this catalyst is used for C 5 Petroleum resin, C 9 Petroleum resin and C 5 、C 9 In the process of hydrodecolorization of blended petroleum resins. Background technique [0002] Petroleum resin is a functional resin with a relatively low molecular weight, which has the characteristics of thickening, cohesiveness and compatibility with other resins. Mainly used in coatings, adhesives, printing inks, rubber additives, paper additives and other fields. Due to the reasons of raw materials and polymerization process, petroleum resin has double bonds or aromatics, and contains halides, hydrogen sulfide, and gel formation in some synthesis processes, so it is very difficult to hydrogenate petroleum resin. The catalyst systems used are mainly noble metals and non-noble metals. Precious metal catalysts include palladium, platinum, germanium, ruthenium, etc., mostly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/755B01J23/80C08F240/00C08F8/04
Inventor 付秋红王永林包洪洲张艳侠段日
Owner CHINA PETROLEUM & CHEM CORP
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