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A kind of catalyst for C5/C6 alkane isomerization and its preparation and use method

A technology for alkane isomerization and catalysts, which is applied in the field of catalysts for catalyzing C5/C6 alkane isomerization, to achieve the effects of cost reduction, pollution avoidance and high activity

Active Publication Date: 2015-12-09
BC P INC CHINA NAT PETROLEUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] What the present invention aims to solve is the problem that the isomerization catalysts in the prior art that do not contain precious metals need to undergo hydrogenation reduction before use to achieve higher activity, and then provide a halogen-free and precious metal-free isomerization catalyst suitable for n-hexane, n-hexane Pentane Isomerization Catalyst

Method used

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  • A kind of catalyst for C5/C6 alkane isomerization and its preparation and use method
  • A kind of catalyst for C5/C6 alkane isomerization and its preparation and use method
  • A kind of catalyst for C5/C6 alkane isomerization and its preparation and use method

Examples

Experimental program
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preparation example Construction

[0038] Preparation method of the active ingredient:

[0039] A.CoH(P(OPh) 3 ) 4 preparation of

[0040] Add 3.1g of triphenyl phosphite (0.01mol) into ethanol solution (20ml) dissolved with 0.582g of cobalt nitrate hexahydrate (0.002mol), dissolve 0.2g of sodium borohydride in 10ml of hot ethanol, and then rapidly cool to room temperature. Drop the sodium borohydride solution into the stirred cobalt nitrate solution, and you can see that the purple cobalt salt disappears rapidly, producing a light yellow precipitate, continue to stir for 10 minutes, filter the product and wash it with ethanol, and dry it in a vacuum to obtain a light yellow precipitate. crude product. Dissolve the crude product in 50ml of hot xylene, filter it while it is hot, add 50ml of ethanol to the filtrate, let it stand for 24h, and the precipitated product is CoH(P(OPh) 3 ) 4 .

[0041] B.NiH(P(OPh) 3 ) 4 preparation of

[0042] 0.01mol triphenyl phosphite was added into ethanol solution (20ml...

Embodiment 1

[0044] The catalyst for C5 / C6 alkane isomerization described in this example comprises a carrier and CoH(P(OPh) which accounts for 0.2wt% of the carrier weight 3 ) 4 , wherein the carrier is composed of alumina and Hβ molecular sieve, the weight ratio of alumina and Hβ molecular sieve is 1:3.

[0045] The preparation method of the catalyst for C5 / C6 alkane isomerization described in this example is:

[0046] (1) Mix 1 part by weight of alumina powder and 3 parts by weight of Hβ molecular sieve evenly, add 0.04 parts by weight of acetic acid, extrude and dry, grind into particles with a particle size of 0.8mm, and then The particles were calcined at 500°C for 4h.

[0047] (2) 0.008 parts by weight of CoH(P(OPh) 3 ) 4 Dissolve it in 10ml chloroform to make an impregnation solution, and use the equal volume impregnation method to dissolve CoH(P(OPh) 3 ) 4 impregnated on the carrier for 24 hours, and then dried at 80° C. for 2 hours under a nitrogen atmosphere to prepare cat...

Embodiment 2

[0050] The catalyst for C5 / C6 alkane isomerization described in this example comprises a carrier and CoH(P(OPh) which accounts for 0.2wt% of the carrier weight 3 ) 4 , wherein the carrier is composed of alumina and Hβ molecular sieve, the weight ratio of alumina and Hβ molecular sieve is 1:1.

[0051] The preparation method of the catalyst for C5 / C6 alkane isomerization described in this example is:

[0052] (1) Mix 2 parts by weight of Hβ molecular sieve and 2 parts by weight of alumina powder evenly, add 0.04 parts by weight of nitric acid to extrude, dry, grind into particles with a particle size of 0.8 mm, and then grind the particles Roast at 500°C for 4h;

[0053] (2) 0.008 parts by weight of CoH(P(OPh) 3 ) 4 Dissolve it in 10ml chloroform to make an impregnation solution, and use the equal volume impregnation method to dissolve CoH(P(OPh) 3 ) 4 impregnated on the carrier for 24 hours, and then dried at 80° C. for 2 hours under a nitrogen atmosphere to prepare cata...

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Abstract

The invention relates to a catalyst for C5 / C6 alkane isomerization. The catalyst is prepared from 0.1-2.0 (wt%) of metal organic hydride, 10-90 (wt%) of an H beta molecular sieve and 90-10 (wt)% of an alumina supporter, wherein the catalyst is prepared by the following steps: mixing the H beta molecular sieve with aluminum oxide, molding and roasting to prepare a composite support, and loading the composite support with metal organic hydride to obtain the catalyst. The catalyst disclosed by the invention does not contain noble metal, and is free from adding of a halogen component, the cost of the catalyst is reduced, the pollution to the environment is avoided, meanwhile, the catalyst can be directly used when being applied to the isomerization process, and does not need to carry out prehydrogenation reduction, the catalyst disclosed by the invention is applicable to isomerization of normal hexane and n-pentane by tests, and the catalytic light paraffin isomerization is relatively high in activity, and good in isomerization alkane selectivity.

Description

technical field [0001] The invention belongs to the field of isomerization of light alkanes, and in particular relates to a catalyst for catalyzing the isomerization of C5 / C6 alkanes and a preparation and use method thereof. Background technique [0002] C5 / C6 alkanes in light alkanes can convert C5 and C6 normal alkanes with lower octane number into isoparaffins with higher octane number through isomerization catalytic process. This high-octane isoparaffin is free of sulfur and olefins and is a highly desirable gasoline component. In the prior art, there are mainly two types of catalysts used for the isomerization of light alkanes, one is a low-temperature isomerization catalyst, as disclosed in the US patent document US3892683A, a carrier containing halogen (F or Cl) The isomerization catalyst, the catalyst includes 0.01-2.0wt% of Pt and 0.01-5.0wt% of Sn, alumina mixture, the above-mentioned mixture and AlCl after evaporation and sublimation 3 Contact and immediately pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/26C07C5/27C07C9/16C07C9/18
Inventor 夏道宏蔡婷婷朱丽君于建宁刘咸尚周玉路项玉芝
Owner BC P INC CHINA NAT PETROLEUM CORP