A kind of low-carbon alkane isomerization catalyst and preparation method thereof

A technology of low-carbon alkanes and catalysts, which is applied in the field of low-carbon alkanes isomerization catalysts and their preparation, can solve problems such as poor activity and diffusion performance, reduced effective utilization of molecular sieves, and influence on catalyst selectivity and stability. Discharge of difficult-to-treat wastewater, small active particles, and reduced production costs

Active Publication Date: 2018-02-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the catalyst prepared by this method, the effective utilization rate of the molecular sieve is reduced, the activity and diffusion performance are poor, and the selectivity and stability of the catalyst are affected.

Method used

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  • A kind of low-carbon alkane isomerization catalyst and preparation method thereof
  • A kind of low-carbon alkane isomerization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of preparation step of catalyst of the present invention is as follows:

[0024] (1) Dissolve chloroplatinic acid containing 1 gram of platinum in 14 grams of water, and 19 grams of ZSM-35 molecular sieve (0.5 microns in particle size, SiO 2 / Al 2 o 3 The molar ratio is 25) and the above solution is fully mixed, and the mixture is dried at 120°C for 16 hours and calcined at 480°C for 4 hours to obtain platinum-loaded ZSM-35 molecular sieves;

[0025] (2) Dissolve 90 grams of water-soluble cornstarch (molecular weight: 35,000) in 300 grams of water, then add 10 grams of the molecular sieve obtained in step (1) at room temperature, fully stir into a uniform suspension, and vacuum spray dry (vacuum The temperature is 0.03MPa, the drying temperature is 60°C, and the drying time is 5h), and a starch-embedded molecular sieve with an average particle diameter of 80 microns is obtained.

[0026] (3) Mix 20 grams of the starch-embedded molecular sieve prepared in step ...

Embodiment 2

[0029] An embodiment of the catalyst of the present invention is the same as in Example 1, except that the substance content in each step is adjusted, the mass ratio of starch to molecular sieve is 5:1, and the starch-embedded molecular sieve with an average particle diameter of 50 microns is prepared. . The composition of the obtained catalyst is Pt: 0.02%, ZSM-35: 4.0%, alumina: the balance. The evaluation results are shown in Table 1.

Embodiment 3

[0031] An embodiment of the catalyst of the present invention is the same as in Example 1, except that palladium chloride is used to replace chloroplatinic acid in step (1), and the substance content in each step is adjusted, and the mass ratio of starch to molecular sieve is 2:1 , prepared a starch-embedded molecular sieve with an average particle diameter of 70 microns, and obtained a catalyst composition, which was Pd: 0.5%, ZSM-35: 0.8%, and alumina: the balance. The evaluation results are shown in Table 1.

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Abstract

The invention discloses a low-carbon alkane isomerization catalyst and a preparation method thereof. The method is to embed the FER type molecular sieve loaded with hydrogenation active components in organic matter, then mix evenly with the precursor of high-temperature-resistant inert oxide, shape, dry and roast to obtain a low-carbon alkane isomerization catalyst. The catalyst of the invention is used in the isomerization process of C5-C10 alkanes. Compared with the existing technology, because the amount of molecular sieve in the catalyst is greatly reduced, not only the production cost of the catalyst is greatly reduced, but also the discharge of difficult-to-treat wastewater during the synthesis of molecular sieves is avoided, and it has the characteristics of high catalytic activity and isomeric olefin selectivity. , can be used to produce blending components of high-octane gasoline.

Description

technical field [0001] The invention relates to a low-carbon alkane isomerization catalyst and a preparation method thereof. The catalyst is suitable for the isomerization reaction of small molecular weight normal paraffins, especially the catalyst for the isomerization of C5-C10 normal paraffins and its application, and can be used to produce high-octane gasoline blending components. Background technique [0002] Under certain conditions, n-alkanes are non-ideal components in petroleum products, and the isomerization reaction of n-alkanes is an important reaction in petroleum processing. Especially in catalytic gasoline blended with refinery residue, the content of sulfur and olefins is relatively high. Hydrodesulfurization and olefin reduction of gasoline can reduce the sulfur content to less than 10µg / g and the olefin content to less than 10v%, but at the same time significantly reduce the octane number. To reduce sulfur and olefins with little or no loss of octane, sel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/67C10G45/64
Inventor 徐会青刘全杰贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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