Method for preparing high-purity isoparaffin from n-alkane

A technology for normal alkanes and isoparaffins, which is applied in the field of preparation of high-purity isoparaffins, can solve the problems of unknown components, complex process, chemical stability, coal-based Fischer-Tropsch synthesis technology is not as good as chemical synthesis technology, etc., to achieve economical Significant benefit, strong reaction processing ability, and wide application range

Inactive Publication Date: 2020-05-19
洛阳金达石化有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Coal-to-Fischer-Tropsch synthesis technology is currently the main method for producing isoparaffins in China, but this technology has flaws compared with traditional chemical synthesis technology. This is because coal-to-oil itself has some unknown unknown components. Coal Fischer-Tropsch synthesis technology is not as good as chemical synthesis technology in terms of stability
At the same time, the adsorption and separation of molecular sieves is required in the follow-up section, and the process is complicated.

Method used

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  • Method for preparing high-purity isoparaffin from n-alkane
  • Method for preparing high-purity isoparaffin from n-alkane

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Comparison scheme
Effect test

Embodiment

[0026] Use normal alkanes to prepare high-purity isoparaffins according to the following steps:

[0027] Step 1: Hydroisomerization

[0028] After mixing n-paraffin with hydrogen, pass through a heat exchanger and enter a heating furnace for heating. After being heated to the reaction temperature, enter the isomerization reactor with catalyst I. In the isomerization reactor, contact with catalyst I for different Structure reaction, catalyst I is a precious metal Pt, La type catalyst with a pore volume of 0.12~0.35ml / g and a specific surface area of ​​150~240m 2 / g. During the reaction, the n-alkane molecules enter the pores of the catalyst I molecular sieve with a certain spatial structure, and through contact with the active metal, the molecules undergo hydrogenolysis under the action of hydrogen, and the molecular chain segment after hydrogenolysis is very short It will be grafted onto the main chain within time, and hydrogen will be removed at the same time. The hydrogen will pa...

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Abstract

The invention discloses a method for preparing high-purity isoparaffin from n-alkane. The method comprises the following steps: 1) subjecting n-alkane and hydrogen to mixing and heating, and contacting the formed mixture with a catalyst I for an isomerization reaction; 2) heating a reaction product obtained in the step 1), contacting the heated reaction product with a catalyst II, and carrying outa hydrogenation dearomatization reaction to remove aromatic hydrocarbons in the product; and 3) contacting the aromatic hydrocarbon-removed product obtained in the step 2) with a catalyst III for a hydroaddition reaction. The method is applicable to liquid wax and part of paraffin oil products with high pour points, poor viscosity-temperature indexes and high n-alkane contents, has the advantagesof wide application range, strong reaction treatment capacity, high separation precision and the like, and can separate isomerized white oil products of different models according to the properties of raw materials and the characteristics of distillation range.

Description

Technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a method for preparing high-purity isoparaffins by using normal alkanes. Background technique [0002] Solvent oil products are one of the five major types of petroleum products. Solvent oil products can be divided into aromatic hydrocarbons, dearomatized aliphatics, isoparaffins, naphthenic hydrocarbons and normal paraffins. Among them, isoparaffinic solvent oils have condensation Low point, low odor, low toxicity and good stability, etc., widely used in printing and dyeing thinners, ink solvents, metal processing cleaning agents, anti-rust oils, odorless sprays, paint organosol formulations, high-grade clothes dry cleaning oils, peroxygen Organic compound carrier, washing daily chemical products, etc. With the impact of the national environmental protection hurricane, various industries are reshuffled, and high-polluting and irregular enterprises will be eliminated. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/08
CPCC10G65/08C10G2300/1081C10G2400/14
Inventor 牛同治赵华韩明徐翠翠李建伟
Owner 洛阳金达石化有限责任公司
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