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 problem of no solid super acid found, low equilibrium conversion rate, poor product selectivity, etc. problem, to achieve the effect of small grain size, high equilibrium conversion rate and simple preparation method

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

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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 (loaded ClO) containing hydrogenation / dehydrogenation metal components of the present invention is adopted. 4 - 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

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Effect test

Embodiment 1

[0051] Embodiment 1 illustrates the Pt-ClO provided by the present invention 4 - / ZrO 2 Catalyst and method for its preparation.

[0052] (1) 108.8gZrOCl 2 ·8H 2 O (Beijing Chemical Plant, analytically pure) was dissolved in 250ml deionized water, and after stirring until the solution was completely clear, it was made into ZrOCl with a concentration of 1.35 mol / liter. 2 solution. in ZrOCl 2 25.0 g H was added to the solution 2 NCONH 2 -Urea (Beijing Yili Fine Chemical Co., Ltd., analytically pure), stirred and dissolved, and the concentration of urea in the solution was 1.67 mol / liter.

[0053] (2) The above solution was poured into a 500ml autoclave, and the temperature was raised to 150° C. under vigorous stirring. At this time, the pH of the gel mother solution was 10.6. The mother liquor was aged at 150° C. under hydrothermal pressure, and the time of the aging process was 45 hours. After the aging, the mother liquor was left to stand for 5 hours, then the supern...

Embodiment 2

[0059] Embodiment 2 illustrates the Pt-ClO provided by the present invention 4 - / Fe 3 o 4 Catalyst and method for its preparation.

[0060] Catalyst preparation operation step and analysis method of embodiment 2 are identical with embodiment 1, difference is, the metal compound used in step (1) is (FeCl 3 9H 2 (0); the concentration of the ammonium perchlorate solution described in the soaking liquid in the step (4) is 2.5 mol / liter. Obtained Pt-ClO 4 - / Fe 3 o 4 Catalyst, recorded as C-2. Its physical and chemical properties are shown in Table 1.

Embodiment 3

[0062] Embodiment 3 illustrates the Pt-ClO provided by the present invention 4 - / CrO 2 Catalyst and method for its preparation.

[0063] Catalyst preparation operation step and analysis method of embodiment 3 are identical with embodiment 1, difference is, metal compound used in step (1) is 40gCrCl 3 9H 2 O; The concentration of the ammonium perchlorate solution described in the soaking liquid in the step (4) is 2.5 mol / liter. Obtained Pt-ClO 4 - / CrO 2 Catalyst, recorded 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 ClO<4-> 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 soluble chloride-containing metal salt water solution 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; drying and roasting precipitate at a lower layer to obtain a ClO<4-> / metal oxide; (2) impregnating the ClO<4-> / metal oxide in an ammonium perchlorate solution; then filtering, drying and roasting to obtain a metal oxide loaded with ClO<4-> radicals; and (3) impregnating the metal oxide loaded with ClO<4-> 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 superacid dual-function catalyst, more specifically, to a solid superacid dual-function 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. Within the distillation range of gasoline, 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 skeletal isomerization of straight-chain alkanes have high octane numbers and are new formulation gasoline. an important blending component. In addition, isobutane, the product of n-butane isomerization reaction, is one of the main raw materials for the alkylation process. [0003] The current method of isomerization of linear alkanes generally uses a solid acid or solid superacid dual-functional catalyst loaded with hydrog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135B01J27/13B01J27/132B01J27/138C07C5/27C07C9/16
Inventor 何奕工满征
Owner CHINA PETROLEUM & CHEM CORP
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