Solid superacid bifunctional catalyst and preparation method thereof

A dual-function catalyst, solid super acid technology, applied in chemical instruments and methods, physical/chemical process catalysts, isomerization hydrocarbon production, etc., can solve the problems of low equilibrium conversion rate, poor product selectivity, and high reaction temperature, and achieve The effect of high equilibrium conversion rate, simple preparation method and low reaction temperature

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second type uses molecular sieve catalysts containing hydrogenation / dehydrogenation metal components. The reaction temperature of this type of isomerization reaction method is high. Because high temperature is not conducive to the skeletal isomerization reaction, the equilibrium conversion rate of the reaction is low and the product selectivity is poor.
[0012] The currently disclosed linear alkane isomerization method has not yet found that the solid superacid containing hydrogenation / dehydrogenation metal components of the present invention (loaded NO 3 - metal oxides of acid radicals) as catalysts

Method used

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  • Solid superacid bifunctional catalyst and preparation method thereof
  • Solid superacid bifunctional catalyst and preparation method thereof
  • Solid superacid bifunctional catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0052] Example 1 illustrates the Pt-NO provided by the present invention 3 - / ZrO 2 Catalyst and its preparation method.

[0053] (1) Add 108.8g Zr(NO 3 ) 4 ·5H 2 O (Beijing Chemical Plant, Analytical Pure) was dissolved in 250ml of deionized water, stirred until the solution was completely clear, and then prepared to a concentration of 1.35mol / L Zr(NO 3 ) 4 Solution. In Zr(NO 3 ) 4 Add 25.0gH to the solution 2 NCONH 2 -Urea (Beijing Yili Fine Chemicals Co., Ltd., analytical grade), stir to dissolve, the concentration of urea in the solution is 1.67 mol / L.

[0054] (2) Pour the above solution into a 500ml autoclave and heat up to 150°C under vigorous stirring. At this time, the pH of the gel mother liquor is 10.6. The mother liquor is aged at 150°C and hydrothermal pressure, and the aging process time is 45 hours. After aging, the mother liquor is allowed to stand for 5 hours, then the supernatant liquid is discarded, and the lower sediment is dried in a vacuum drying oven at a va...

Embodiment 2

[0060] Example 2 illustrates the Pt-NO provided by the present invention 3 - / Fe 3 O 4 Catalyst and its preparation method.

[0061] The catalyst preparation operation steps and analysis methods of Example 2 are the same as those of Example 1, except that the metal compound used in step (1) is Fe(NO 3 ) 3 The concentration of the ammonium nitrate solution described in the immersion solution in step (4) is 2.5 moles / liter. Pt-NO obtained 3 - / Fe 3 O 4 The catalyst is denoted as C-2. Its physical and chemical properties are shown in Table 1.

Embodiment 3

[0063] Example 3 illustrates the Pt-NO provided by the present invention 3 - / CrO 2 Catalyst and its preparation method.

[0064] The catalyst preparation operation steps and analysis methods of Example 3 are the same as those of Example 1, except that the metal compound used in step (1) is 40gCr(NO 3 ) 3 The concentration of the ammonium nitrate solution described in the immersion solution in step (4) is 2.5 moles / liter. Pt-NO obtained 3 - / CrO 2 The catalyst is denoted as C-3. Its physical and chemical properties are shown in Table 1.

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Abstract

A solid superacid bifunctional catalyst and a preparation method thereof. The catalyst is obtained by loading a hydrogenation / dehydrogenation metal component on metal oxide supported with NO<3-> acid radicals; and the metal component is one or more selected from Pt, Pd and Ni. The preparation method is as follows: (1) evenly mixing a water solution of a soluble chloride-containing metal salt with a soluble alkali precipitator; subjecting the mixed solution to a hydro-thermal treatment under a closed condition to obtain a metal salt hydrogel; subjecting the hydrogel to aging and layering; and drying and roasting the precipitate at a lower layer to obtain a NO<3-> / metal oxide; (2) impregnating the NO<3-> / metal oxide in an ammonium nitrate solution; and then filtering, drying and roasting to obtain a metal oxide loaded with NO<3-> radicals; and (3) impregnating the metal oxide loaded with NO<3-> radicals in a water solution of a soluble hydrogen and dehydrogenation metal component compound; and then filtering, drying and roasting to obtain the solid superacid bifunctional catalyst. The catalyst provided by the invention can be used for catalysis of an isomerization reaction of straight-chain paraffin, and has the characteristics of low reaction temperature, high conversion rate and good selectivity.

Description

Technical field [0001] The invention relates to a solid super acid bifunctional catalyst, and more specifically, to a solid super acid bifunctional catalyst containing hydrogenation / dehydrogenation metal components. Background technique [0002] The isomerization reaction process of linear alkanes is an important process in the petroleum refining industry. In the gasoline distillation range, the octane number of straight-chain alkanes is very low and cannot be used as an effective blending component of gasoline. The branched-chain alkanes obtained by the skeletal isomerization reaction of straight-chain alkanes have high octane number and are newly formulated gasolines. The important reconciling component. In addition, isobutane, the product of the isomerization reaction of n-butane, is one of the main raw materials for the alkylation process. [0003] The current linear alkane isomerization reaction method generally uses a solid acid or solid super acid bifunctional catalyst loa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/25C07C5/27C07C9/18C07C9/16
Inventor 何奕工满征
Owner CHINA PETROLEUM & CHEM CORP
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