Process for preparing composite carbon carrier noble metal dehydrogenation catalyst

A technology of dehydrogenation catalyst and composite carbon, which is applied in the direction of refining to remove heteroatoms, etc., can solve the problems that the physical structure such as pore structure and pore size distribution has not been studied, and achieve improved anti-coking performance, improved dehydrogenation activity, and stability good effect

Inactive Publication Date: 2006-10-11
PETROCHINA CO LTD +1
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Problems solved by technology

However, this patent only uses one kind of hydrocarbon as the raw material for carbon coating, and only one kind of active component is used to pr

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  • Process for preparing composite carbon carrier noble metal dehydrogenation catalyst
  • Process for preparing composite carbon carrier noble metal dehydrogenation catalyst
  • Process for preparing composite carbon carrier noble metal dehydrogenation catalyst

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preparation example Construction

[0045] (1). Preparation of composite carbon carrier and suitable process conditions

[0046]The operating factors affecting the preparation of composite carbon support include: reaction temperature, reaction time, hydrocarbon gas concentration and nitrogen flow rate. Through multiple experimental studies on the above operational factors, the order of influence of the operational factors obtained by means of the orthogonal test method is: reaction temperature>reaction time>nitrogen flow rate>hydrocarbon gas concentration.

[0047] 1. Effect of reaction temperature and reaction time on carbon content of composite carbon carrier

[0048] In order to investigate the influence of reaction temperature and reaction time on the carbon content, firstly, the olefin type compound hydrocarbon A was used as the raw material, and the composite char The relationship between the carbon content of the carrier and the reaction time. Test results such as figure 1 Shown:

[0049] from figure...

Embodiment 1

[0125] 1. Preparation of composite carbon carrier, refer to attached figure 1 , put the solid inorganic material (aluminum oxide) in the reactor, and place the raw material hydrocarbon A cyclohexene in the vaporizer, N 2 After the gas is dried, it enters the vaporizer, and the cyclohexene is brought into the reactor. The cyclohexene is cracked at a high temperature of 800°C, and the carbon substances generated by the cracking are combined with the solid inorganic material alumina. After 14 hours, the product containing A composite carbon carrier with a carbon content of 34%. After the reaction, the tail gas is discharged into the atmosphere.

[0126] 2. Catalyst preparation: First, measure the water absorption of CCS, and then prepare a certain concentration of H according to the water absorption and metering ratio 2 PtCl 6 and SnCl 2 Mix the solution, adjust the pH value of the solution to be acidic, and immerse the CCS in the mixed solution for 24 hours. After natural a...

Embodiment 2

[0132] 1. Preparation of composite carbon carrier, refer to attached figure 1 , the solid inorganic material alumina is placed in the reactor, and the raw material hydrocarbon A cyclohexene is placed in the vaporizer, N 2 After the gas is dried, it enters the vaporizer, and the hydrocarbon A cyclohexene is brought into the reactor. The hydrocarbon is cracked at a high temperature of 600°C. The carbon-like substances generated by the cracking are combined with the solid inorganic material alumina, and the carbon-containing material can be obtained after 10 hours. 30% composite carbon carrier. After the reaction, the tail gas is discharged into the atmosphere.

[0133] 2. Catalyst preparation: First, measure the water absorption of CCS, and then prepare a certain concentration of H according to the water absorption and metering ratio 2 PtCl 6 and SnCl 2 Mix the solution, adjust the pH value of the solution to be acidic, and immerse the CCS in the mixed solution for 24 hours....

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Abstract

The invention relates to a method for preparation of precious-metal dehydrogenation catalyst with compound carbon as carrier, which adopts compound carbon material and allocates precious-metal active component on with the said material to prepare new precious-metal dehydrogenation catalyst with compound carbon as carrier. Compared with homogeneous precious-metal catalyst, the said catalyst not only can reduce the coking rate by 25 % but also can increase the dehydrogenation activity by 5-10 %, and is of high cryogenic activity and good stability. The invention provides unitary implementation procedure for preparation technology of compound carbon material and precious-metal dehydrogenation catalyst and activity evaluation, which changes the conventional technical thoughts using active components and catalyst promoter in the past time and improves the coking resistance of the catalyst beginning with carrier.

Description

technical field [0001] The invention belongs to the fields of oil refining and petrochemical industry, and relates to a dehydrogenation catalyst used in hydrocarbon processing, in particular to a preparation method of a composite carbon carrier noble metal dehydrogenation catalyst. Background technique [0002] In most processes of oil refining and petrochemical industry, the role of catalyst is very important. Whether it is hydrogenation, reforming, or aromatization, isomerization and alkylation, etc., its economic benefit and production cycle are related to the catalyst used. Lifespan is closely related. Since the reaction raw materials are mostly hydrocarbon compounds containing carbon atoms, especially for the feed containing aromatic hydrocarbons and naphthenes, a very common problem is the coking and deactivation of the catalyst, and the life of the catalyst depends to a large extent on the catalyst. Coking condition. Therefore, improving the anti-coking performance ...

Claims

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Application Information

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IPC IPC(8): C10G45/02
Inventor 苏君雅田然杨继涛赵野郝雪松张志华黄亚茹胡胜张文慧王海兴
Owner PETROCHINA CO LTD
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