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Isomerization reaction method of straight-chain paraffin

A technology of isomerization of straight-chain alkanes, which is applied in the field of isomerization of alkanes, can solve the problems of low equilibrium conversion rate, poor product selectivity, and high reaction temperature, and achieve high equilibrium conversion rate, low reaction temperature, and high selectivity. Good results

Active Publication Date: 2015-03-18
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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  • Isomerization reaction method of straight-chain paraffin
  • Isomerization reaction method of straight-chain paraffin
  • Isomerization reaction method of straight-chain paraffin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1 illustrates Pt-NO 3 - / ZrO 2 Catalyst and method for its preparation.

[0048] (1) 108.8g Zr(NO 3 ) 4 ·5H 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 Zr(NO 3 ) 4 solution. In Zr(NO 3 ) 4 Add 25.0gH 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.

[0049] (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 supernatant was poured off, and the lower precipitate was dried in a vacuum dryi...

Embodiment 2

[0055] Example 2 illustrates Pt-NO 3 - / Fe 3 o 4 Catalyst and method for its preparation.

[0056]Catalyst preparation operation step and analysis method of embodiment 2 are identical with embodiment 1, difference is, metal compound used in step (1) is Fe(NO 3 ) 3 ; The concentration of the ammonium nitrate solution described in the soaking liquid in the step (4) is 0.8 mol / liter; In the step (5), the 0.063gH 2 [PtN 6 ] Dissolve chloroplatinic acid in 30ml deionized water to make an impregnation solution. Obtained Pt-NO 3 - / Fe 3 o 4 Catalyst, recorded as C-2. Its physical and chemical properties are shown in Table 1.

Embodiment 3

[0058] Example 3 illustrates Pt-NO 3 - / CrO 2 Catalyst and method for its preparation.

[0059] Catalyst preparation operation step and analysis method of embodiment 3 are identical with embodiment 1, difference is, metal compound used in step (1) is 40gCr(NO 3 ) 3 ; The concentration of the ammonium nitrate solution described in the soaking solution in the step (4) is 2.5 mol / liter. Obtained Pt-NO 3 - / CrO 2 Catalyst, recorded as C-3. Its physical and chemical properties are shown in Table 1.

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Abstract

The invention relates to an isomerization reaction method of straight-chain paraffin, which is characterized in that a straight-chain paraffin raw material is introduced in a reactor, and is contacted with an isomerization catalyst under the condition of hydrogen existence, and generates branch-chain paraffin under the isomerization reaction condition; the isomerization catalyst is solid superacid loaded with a hydrogenation / dehydrogenation metal component, the solid superacid is a metal oxide loaded with a NO3<-> acid group, and the hydrogenation / dehydrogenation metal component is one or more selected from Pt, Pd and Ni. The provided isomerization reaction method of the straight-chain paraffin has the characteristics of low reaction temperature, high conversion rate and good selectivity.

Description

technical field [0001] The invention relates to an isomerization reaction method of alkanes, more specifically, relates to a method for isomerization reaction of linear alkanes using a solid superacid bifunctional catalyst loaded with 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 so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/60C07C5/27C07C9/16C07C9/18B01J27/25
Inventor 何奕工满征
Owner CHINA PETROLEUM & CHEM CORP