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Straight-chain lightweight alkane isomerization catalyst, and preparation method and application thereof

A technology of light alkanes and catalysts, applied in the field of isomerization catalysts and their preparation, can solve the problems of affecting the catalytic performance of catalysts, the inability to provide acidity on the carrier, and easy-to-corrosion equipment, so as to achieve good catalytic activity and stability and reduce production costs , less corrosive effect on equipment

Active Publication Date: 2013-09-18
REZEL CATALYSTS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And in CN1244570A, in the method for reducing gasoline benzene content and paraffin isomerization provided by it, adopted the catalyst that contains 4~15% halogen such as chlorine and Group VIII metal, and is made carrier by η alumina and γ alumina , the disadvantage is that the loaded chlorine is easily lost with the progress of the reaction process. On the one hand, it is easy to corrode the equipment. On the other hand, it cannot make the carrier provide stable acidity, which affects the catalytic performance of the catalyst, thus limiting its practical application in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 100 grams of macroporous alumina (industrial product, Sichuan Runhe Catalytic Material Company, solid content 63 mass %, pore volume 1.5 ml / g) and 100 milliliters of aluminum sol (industrial product, Sichuan Runhe Catalytic Material Company, Al / Cl Molar ratio 1.2, aluminum oxide 20% by mass) mixed, after diluting 2 milliliters of hydrochloric acid (chemically pure, Beijing Chemical Reagent Company) with 30 milliliters of distilled water, add in the material kneading and extrusion molding, 120 degree of drying 2 hours, 550 degree of roasting After 4 hours, a composite macroporous alumina support was obtained.

[0023] Get 100 grams of composite macroporous alumina carriers on a dry basis, impregnate 24 hours with 45 milliliters of 8.6 mol / liter chloroplatinic acid (chemically pure, prepared by reagents from Beijing Chemical Reagent Company) solution, dry at 120 degrees for 4 hours, and dry at 550 degrees Calcined in the air for 4 hours to obtain the catalyst of Example 1...

Embodiment 2

[0027] 100 grams of macroporous alumina (same as above, solid content 65% by mass, pore volume 1.2 ml / g) and 100 ml of aluminum sol (same as above, Al / Cl molar ratio 1.3, alumina 24% by mass) were mixed, and 3 ml of hydrochloric acid (Same as above) After diluting with 30 milliliters of distilled water, add to the material and knead and extrude to shape, dry at 110°C for 4 hours, and roast at 600°C for 2 hours to obtain a composite macroporous alumina carrier.

[0028] Get 100 grams of composite macroporous alumina carriers on a dry basis, impregnate with 50 milliliters of 7.5 mol / liter chloroplatinic acid (same as above) solution for 20 hours, dry at 120 degrees for 3 hours, and roast in 500 degrees of air for 6 hours to obtain For the catalyst of Example 2 of the present invention, the platinum content in the obtained catalyst is 0.35% by mass, the bulk specific gravity is 0.73 g / ml, and the crushing strength is 80 N / cm.

Embodiment 3

[0030] 150 grams of macroporous alumina (same as above, solid content 67% by mass, pore volume 1.4 ml / g) and 100 ml of aluminum sol (same as above, Al / Cl molar ratio 1.1, alumina 21% by mass) were mixed, and 4 ml of hydrochloric acid (Same as above) After diluting with 50 milliliters of distilled water, add to the material and knead and extrude to shape, dry at 110°C for 4 hours, and roast at 500°C for 6 hours to obtain a composite macroporous alumina carrier.

[0031] Get 100 grams of composite macroporous alumina carriers on a dry basis, impregnate 16 hours with 50 milliliters of 7.0 mol / liter chloroplatinic acid (same as above) solution, dry at 120 degrees for 2 hours, and roast in 580 degrees of air for 3 hours to obtain For the catalyst of Example 3 of the present invention, the platinum content in the obtained catalyst is 0.34% by mass, the bulk specific gravity is 0.71 g / ml, and the crushing strength is 70 N / cm.

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Abstract

The invention relates to a straight-chain lightweight alkane isomerization catalyst, and a preparation method and an application thereof. The catalyst comprises a composite macroporous alumina carrier and 0.01-2.0% of platinum by mass calculated with the carrier as a reference. The composite macroporous alumina carrier comprises, by mass, calculated with the carrier as a reference, 5-45% of aluminum sol, 50-90% of macroporous alumina, and hydrochloric acid added according to a mass ratio of Al2O3 in the macroporous alumina to HCl of 15-200; kneading, strip extrusion forming and drying are carried out, and the material is roasted for 0.5-6h under a temperature of 400-700 DEG C; the material is then impregnated for 1-30h by using chloroplatinic acid according to a platinum load; the material is dried, and is roasted for 0.5-6h under a temperature of 400-700 DEG C, such that the catalyst is prepared. An Al / Cl molar ratio of the aluminum sol is 0.9-1.4. The volume of the macroporous alumina is 1.0-1.8ml / g. The catalyst is suitable for a straight-chain lightweight alkane isomerization reaction, and has good mechanical strength and catalytic activity. The catalyst has the advantages of high product liquid yield and high multi-branched alkane selectivity. The catalyst can be used for improving light hydrocarbon component octane number.

Description

technical field [0001] The present invention relates to an isomerization catalyst and its preparation method and application, more specifically to a low-temperature isomerization catalyst for straight-chain light alkanes containing platinum group noble metals and composite macroporous alumina carrier, and its preparation method and application methods. Background technique [0002] During primary and secondary processing of crude oil, C 5 ~C 6 The light hydrocarbon fraction as the main composition is generally used as a blending component of gasoline, but the n-alkanes contained in it have a low octane number, and a large amount of it will reduce the front-end octane number of gasoline and affect the quality of gasoline. Paraffins have a higher octane number, which will reconcile the small molecular weight C contained in gasoline 5 ~C 6 The conversion of n-alkanes into isoparaffins can effectively increase the front-end octane number of gasoline, as described in CN103711...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J35/10C07C5/27C07C9/16
Inventor 卓润生
Owner REZEL CATALYSTS CORP
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