A kind of preparation of hydrogenation catalyst and hydrogenation catalyst and application

A hydrogenation catalyst, catalyst technology, applied in catalyst activation/preparation, hydrogenation to hydrocarbons, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of difficulty in ensuring stability, catalyst activity, selectivity, stability problems such as sexual restriction and stay, to achieve good industrial application prospects, guarantee selectivity and activity stability, and low cost.

Active Publication Date: 2019-10-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no significant difference between this catalyst and the existing catalysts for the selective hydrogenation of acetylene to ethylene, such as Pd-Cr catalyst [us-A4577047], Pd-Ag [EP-A64301], Pd-Au [EP-A89252], and Au-Pd / SiO2, Ag-Pd / SiO2 [Applied Catalysis A: General 469 (2014) 419–426], etc., so it is difficult to guarantee that the catalyst can hydrogenate vinyl acetylene It has high selectivity, good stability, and other necessary properties, especially in raw materials rich in butadiene, butene and other unsaturated hydrocarbons, to achieve high-performance catalysis of vinyl acetylene convert
[0005] In summary, although there have been many researches and invention applications in this technical field, in terms of practical industrial applications, subject to the limitations of the catalyst's activity, selectivity, stability, etc., the hydrogenation of vinyl acetylene Most of the butadiene technology is still in the stage of small laboratory test or industrial pilot test

Method used

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  • A kind of preparation of hydrogenation catalyst and hydrogenation catalyst and application
  • A kind of preparation of hydrogenation catalyst and hydrogenation catalyst and application
  • A kind of preparation of hydrogenation catalyst and hydrogenation catalyst and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of alumina carrier: Take 15g boehmite powder (Al2O3 dry basis content is 80%), disperse it in 150ml water, heat up to 80°C, add 2mol / L dilute HNO3 dropwise, adjust the pH value to 1.5-2.5, and carry out degumming , the boehmite sol was obtained after stirring for 6 hours. Then, after adding 2.4g of sucrose and stirring to dissolve, aged at room temperature for 6h, then transferred to an oven and dried at 90°C for 12 hours to obtain a solid sample labeled as S-Al2O3, and then transferred to a muffle furnace and slowly raised the temperature to 800°C under the protection of nitrogen. ℃ for 3 hours, and the heating rate is 0.5 ℃ / min to obtain the carbon-alumina composite carrier C-Al2O3. The C-Al2O3 sample obtained by roasting in nitrogen was cooled to below 200°C in a nitrogen atmosphere, then air was introduced, and then roasted again. The roasting temperature was 650°C, the roasting time was 2 hours, and the heating rate was 1°C / min. Thus, the required alum...

Embodiment 2

[0025] Preparation of alumina carrier: The experimental conditions are the same as in Example 1, except that sucrose is replaced by glucose, fructose, and soluble starch to obtain alumina carriers, which are respectively marked as Al2O3(g), Al2O3(f), and Al2O3(ss).

Embodiment 3

[0027] Preparation of alumina carrier: the experimental conditions are the same as in Example 1, except that the amount of sucrose added is 1.0g and 3.5g respectively, and the obtained alumina carrier is marked as Al2O3(s-2), Al2O3(s-3).

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Abstract

The invention provides a preparation method of a hydrogenation catalyst and its application in selective hydrogenation reaction. Alumina is used as a carrier and prepared from boehmite. During the preparation process, sucrose, glucose, and soluble starch are added to the carrier precursor as structural aids, and it is roasted in an inert atmosphere and air successively. The roasting temperature is 450‑1000 ℃. The catalyst active components are supported by impregnation method. The active component is selected from an alloy composed of one or more of metals Ru, Pd, and Pt and one or more of Cu, Ag, and Au. The catalyst can be used in the reaction of selective hydrogenation of alkyne to olefin.

Description

technical field [0001] The invention relates to the preparation of a hydrogenation catalyst and its application in the selective hydrogenation reaction of alkynes. Specifically, it is the synthesis of an alumina-supported alloy catalyst and its application in the selective hydrogenation of vinyl acetylene. Background technique [0002] Butadiene is an important petrochemical basic organic raw material and synthetic rubber monomer. It has a wide range of uses in synthetic rubber and organic synthesis. It is mainly used in the production of adiponitrile, 1,4-butanediol, butadiene rubber, Styrene butadiene rubber, etc. At present, there are two main sources of butadiene, one is obtained from the dehydrogenation of the C4 fraction of the refinery, and this method is currently used in a few countries and regions. The other is separated from the mixed C4 fraction produced by the ethylene cracking unit, which has better economic advantages and is currently the main production rou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/66B01J23/44B01J23/52B01J23/50B01J23/89B01J35/10B01J37/08C07C5/09C07C11/04C07C11/06C07C11/08C07C11/16
CPCC07C5/09B01J21/02B01J23/44B01J23/50B01J23/52B01J23/66B01J23/892B01J23/8926B01J37/0009B01J35/60C07C11/04C07C11/06C07C11/08C07C11/16Y02P20/52
Inventor 郑明远张涛王爱琴王晓东
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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