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Carrier superfine alloy hydrogenation catalyst for dearomatization and its preparation

A technology for hydrodearomatization and hydrodearomatization, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of insufficient dearomatization ability and kerosene smell Improvements are unsatisfactory and have no oxygen regeneration performance

Active Publication Date: 2005-05-11
南京红叶石化有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the industrial hydrogenation catalysts for the production of odorless kerosene (the F10501 catalyst currently used in Nanjing Oil Refinery) are high-nickel catalysts with a nickel content of about 40-50%, which have no oxygen regeneration performance and poor sulfur resistance.
The existing catalysts have disadvantages such as insufficient dearomatization ability when the content of aromatics in the raw material is high, the use temperature range is narrow, and the improvement of the taste of kerosene is still unsatisfactory, etc.
For example, the activity and stability of the catalyst in the hydrodearomatization of Chinese patent application No. 97 1 06594.2 cannot meet the needs of the industrial process of producing odorless kerosene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] Step 1 Mix 27.5g of nickel nitrate hexahydrate, 4g of distilled water and 6g of nitric acid, and heat in a water bath to completely dissolve to obtain solution A. Use another small beaker to first weigh 20 g of absolute ethanol, then add 7.9 g of tetra-n-butyl titanate therein, and stir well. Under stirring, the solution A prepared above was added dropwise thereto to obtain a green transparent dipping solution. Weigh 46g of molded Al 2 o 3 -SiO 2 Carrier, add the prepared impregnating liquid to it, impregnate for 40h, and pour out the remaining liquid 29.2g. The solid wet material is air-dried at room temperature for 24 hours, and dried at 60°C for 10 hours.

[0046] Step 2 Weigh 27.5g of nickel nitrate hexahydrate in a small beaker, then add 4g of distilled water, and heat to dissolve; then weigh 3.4g of ammonium molybdate in another small beaker, add 6g of distilled water, and heat to dissolve. The two solutions were combined to obtain solution B. Soak solution ...

example 2

[0049] Step 1 Take 27.5g Co(NO 3 ) 2 6H 2 O. 4g of distilled water and 6g of glacial acetic acid were mixed, heated in a water bath to completely dissolve to obtain solution A. Use another small beaker to weigh 20 g of absolute ethanol first, then add 7.9 g of tetra-n-butyl titanate into it, and stir until a light yellow solution is formed. Under stirring, the solution A prepared above was added dropwise thereto to obtain a light red solution. Weigh 50g SiO2 2 -Al 2 o 3 Add the prepared liquid to the carrier, soak for 24 hours, and the remaining liquid is 47.5g. The solid wet material is air-dried at room temperature for 24 hours, and dried at 60°C for 10 hours.

[0050] Step 2 Weigh 27.5g of cobalt nitrate hexahydrate in a small beaker, then add 4g of distilled water, heat to dissolve; then weigh 3.4g of ammonium molybdate in another small beaker, add 6g of distilled water, and heat to dissolve. The two solutions were combined to obtain solution B. Soak solution B in...

example 3

[0077][Example 3] Hydrolyze tetraethyl orthosilicate (TEOS) under acidic conditions, and then mix it with the alcohol solution of butyl titanate and nickel nitrate (the preparation process is the same as in Example 1) to obtain a green transparent solution. Select the commercially available ZSM-5 molecular sieve support material in the form of strips to impregnate with the above-mentioned sol in equal volume. After complete impregnation, drain the catalyst at room temperature, use the same process conditions as in Example 1, dry at 60°C and roast at 500°C to obtain the MKC catalyst.

[0078] At 180℃, 2.0h -1 , 1.2MPa, and hydrogen-to-oil volume ratio of 500:1, the MKC catalyst was evaluated for 200h dearomatization activity stability (intermittent start and stop), no significant change in activity was found, and the aromatics content in the product was all lower than 500μg / g.

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PUM

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Abstract

A dearylating hydrocatalyst for preparing the kerosene-type solvent oil contains Ni, TiO2, MoO3, and optional assistance (alkali-earth metal or RE metal). Its preparing process includes such steps as as using the shaped carrier to directly carry the active components, cocatalyst and structure regulating component, in-situ sol-gel reacting, polycondensing, ageing, drying and calcining. Its advantages are low content of Ni, and high activity and stability.

Description

technical field [0001] The invention relates to a low-nickel-content, high-activity, high-stability hydrodearomatization catalyst for producing special kerosene-type odorless solvent oil (abbreviated as odorless kerosene), in particular to a supported ultrafine alloy hydrodearomatization catalyst and its preparation method. technical background [0002] The source of odor in kerosene is not only related to the content of impurities such as sulfides and the distillation range distribution of kerosene, but also related to the group composition. The kerosene after removing sulfur and other impurities still has a heavy smell, and studies have shown that this is mainly caused by the aromatics and naphthenes therein. [0003] The required sulfur content and aromatic content of odorless solvent oil are very low, and it should have the characteristics of non-toxic and odorless. Odorless solvent oil has a high degree of cleanliness and excellent stability, water-white color, no flu...

Claims

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Application Information

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IPC IPC(8): B01J23/882B01J23/883C07C5/10
Inventor 林西平邬国英周应斌吕翔周永生陈锡武
Owner 南京红叶石化有限公司
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