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C5/C6 alkane isomerization catalyst supported by nickel boride and its preparation and use method

An alkane isomerization and catalyst technology, which is applied in the field of catalysts for catalyzing C5/C6 alkane isomerization, can solve the problem of high use temperature, and achieve the effects of avoiding pollution, good stability and reducing costs.

Active Publication Date: 2015-09-09
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 that the use temperature of the isomerization catalyst without precious metals in the prior art is relatively high, and the problem of hydrogenation reduction and passivation treatment is required before use, and then provides a halogen-free and precious metal-free, suitable Isomerization catalyst for n-hexane and n-pentane

Method used

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  • C5/C6 alkane isomerization catalyst supported by nickel boride and its preparation and use method
  • C5/C6 alkane isomerization catalyst supported by nickel boride and its preparation and use method
  • C5/C6 alkane isomerization catalyst supported by nickel boride and its preparation and use method

Examples

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preparation example Construction

[0040] Preparation method of the active ingredient:

[0041] Dissolve 5g of nickel chloride hexahydrate in 150g of distilled water, add hydrochloric acid dropwise to adjust the pH to 1-2, add 10g of n-hexane to the solution as a dispersion, then slowly add 150g of 3% hydroboration solution dropwise while vigorously stirring Sodium aqueous solution, let stand for 1 hour after the dropwise addition, filter, and dry at 50°C to obtain nickel boride. The TPR spectrogram of described nickel boride is as figure 1 shown in the figure 1 Among them, the negative peak is around 300°C, indicating that hydrogen gas is released in the nickel boride system, which proves that it contains hydrogen.

[0042] As an optional embodiment, when preparing the nickel boride, the molar ratio of the sodium borohydride and nickel chloride can be any value in 8:1-4:1, the quality of the sodium borohydride aqueous solution used The concentration is then preferably 1%-5%. And, also can use potassium boroh...

Embodiment 1

[0044] The catalyst for C5 / C6 alkane isomerization described in this example comprises a carrier and nickel boride accounting for 5wt% of the carrier weight, wherein the carrier is composed of alumina and Hβ molecular sieve, and the alumina The weight ratio to Hβ molecular sieve is 1:3.

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

[0046] Calcinate the Hβ molecular sieve at 500°C for 4h, then mix 1 weight part of alumina powder with 3 weight parts of the roasted Hβ molecular sieve, add 0.2 weight part of nickel boride, mix well and extrude into a rod, 50°C After drying, it was ground into particles with a particle size of 0.45 mm, and then the particles were dried at 200° C. under a nitrogen atmosphere for 2 hours to prepare catalyst A1.

[0047] The catalyst A1 prepared in this example was prepared at a reaction temperature of 230°C; a reaction pressure of 2.0 MPa; a hydrogen-oil molar ratio of 4.0, and a mass ...

Embodiment 2

[0049] The catalyst for C5 / C6 alkane isomerization described in this example comprises a carrier and nickel boride accounting for 1 wt% of the carrier weight, wherein the carrier is composed of alumina and Hβ molecular sieve, and the alumina The weight ratio to Hβ molecular sieve is 1:9.

[0050] The preparation method of the catalyst for C5 / C6 alkane isomerization described in this example is:

[0051] Calcinate the Hβ molecular sieve at 500°C for 4 hours, then mix 1 weight part of alumina powder with 9 weight parts of the roasted Hβ molecular sieve, add 0.1 weight part of nickel boride, mix evenly and extrude into strips, 50°C After drying, it was ground into particles with a particle size of 0.45 mm, and then the particles were dried at 200° C. under a nitrogen atmosphere for 2 hours to prepare catalyst A2.

[0052] The catalyst A2 prepared in this example was prepared at a reaction temperature of 230°C; a reaction pressure of 2.0MPa; a hydrogen-oil molar ratio of 4.0, and...

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Abstract

The invention relates to a C5 / C6 alkane isomerization catalyst loaded with nickel boride as well as a preparation method and an application method thereof. The catalyst comprises a carrier and the nickel boride the weight of which is 1-5% of that of the carrier, wherein the carrier is formed by aluminium oxide and an H beta molecular sieve; the weight ratio of the aluminium oxide to the H beta molecular sieve is (1:9)-(9:1). According to the catalyst provided by the invention, halogen components are not needed to be added, and noble metals are not used, so that the environmental pollution is avoided and the catalyst cost is reduced; besides, the catalyst can be directly used for isomerization process without requiring pre-hydrogenation for reduction. Tests prove that when the catalyst is used for isomerization reaction for catalyzing n-hexane and n-pentane, the activity of the catalyst is higher, and the isoalkane selectivity and the catalyst stability are better.

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] The C5 / C6 n-alkanes in light alkanes have much lower octane number than their corresponding isoparaffins. Catalytic reforming has little effect on improving the octane number of this fraction, while the isomerization process can convert octane C5 and C6 normal paraffins with lower alkane number are converted into isoparaffins with higher octane number. 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: medium-temperature type and low-temperature type. [0003] Commonly used medium-temperature isomerization catalysts are noble metal bifunctional catalysts, such as the P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/072C10G35/095
Inventor 夏道宏蔡婷婷朱丽君于建宁刘咸尚周文博
Owner BC P INC CHINA NAT PETROLEUM CORP
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