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Method for producing n-hexane containing heptane raw material

A production method and technology of n-hexane, which are applied in chemical instruments and methods, purification/separation of hydrocarbons, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem that it is difficult to obtain high-purity isohexane and n-hexane products. , increase the processing load of n-hexane raw materials, it is difficult to meet the requirements of process indicators, etc., to achieve good stability and regeneration performance, long-term operation, and flexible adjustment.

Pending Publication Date: 2021-01-15
洛阳金达石化有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, due to the process adjustment of oil refining enterprises, the content of heavy components such as heptane in the current n-hexane raw material has gradually increased, so the processing load of the original n-hexane raw material has been increased, and it is difficult to meet the process index requirements
In order to be able to produce qualified n-hexane and isohexane products, many enterprises adopt measures such as increasing the bottom temperature of the tower and increasing the reflux ratio, but this increases the production energy consumption, and it is difficult to obtain high-purity isohexane and n-hexane products, which affects economic benefits

Method used

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  • Method for producing n-hexane containing heptane raw material
  • Method for producing n-hexane containing heptane raw material
  • Method for producing n-hexane containing heptane raw material

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Experimental program
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Effect test

Embodiment 1

[0024] The properties of raw materials are shown in Table 1.

[0025] Table 1 Raw material properties 1

[0026]

[0027] A kind of n-hexane production method that contains heptane raw material, it comprises the following steps:

[0028] Step 1. After the raw material is mixed with hydrogen and exchanged heat with the reaction product, the temperature is 142°C. After being heated by a heater to 172°C, it enters the reactor to contact with the catalyst, and the hydrofining reaction is carried out under the action of the hydrofining catalyst. The catalyst is Ni-based catalyst, the appearance is spherical, and the specific surface area of ​​the catalyst is 50-90m 2 / g, pore volume: 0.15~0.3ml / g, bulk specific gravity: 0.6±0.02g / ml, radial compressive strength: 24~38N / grain.

[0029] Step 2, the reaction product enters the deheptanizer for pre-fractionation after gas-liquid separation in the low-pressure separator, and most of the heptane in the reaction product is separated,...

Embodiment 2

[0038] See Table 4 for raw materials.

[0039] Table 4 raw material crude hexane properties 2

[0040]

[0041] A kind of n-hexane production method that contains heptane raw material, it comprises the following steps:

[0042] Step 1. After mixing the raw material with hydrogen and exchanging heat with the reaction product, the temperature is 136°C, heated to 178°C by the heater, entering the reactor to contact with the catalyst, and the hydrofining reaction is carried out under the action of the hydrofining catalyst. The catalyst is Ni-based catalyst, the appearance is spherical, and the specific surface area of ​​the catalyst is 50-90m 2 / g, pore volume: 0.15~0.3ml / g, bulk specific gravity: 0.6±0.02g / ml, radial compressive strength: 24~38N / grain. .

[0043] Step 2, the reaction product enters the deheptanizer for pre-fractionation after gas-liquid separation in the low-pressure separator, and most of the heptane in the reaction product is separated, and then the obtai...

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Abstract

The invention relates to a method for producing n-hexane containing a heptane raw material, which comprises the following steps of fully mixing crude hexane with high heptane content with hydrogen, exchanging heat with a reaction product, heating to a reaction temperature by a heat exchanger, feeding into a hydrogenation reactor loaded with a catalyst, and performing hydrofining reaction under theaction of a hydrofining catalyst to remove aromatic hydrocarbon and unsaturated hydrocarbon in the raw material, carrying out gas-liquid separation on a product after the reaction through a low-pressure separator, and then feeding the product into a fractionation system for fine cutting, wherein the fractionation system comprises a heptane removal tower, a light component removal tower, an isohexane removal tower and an n-hexane removal tower which are connected in sequence, and after the reaction, enabling the product to enter a heptane removal tower to separate most heptane in the high-heptane-content crude hexane in a pre-fractionation manner, and then enter a light component removal tower, an isohexane removal tower and an n-hexane removal tower to finely cut the obtained mixed C6 component oil to obtain high-content n-hexane and isohexane products. The method provided by the invention can be used for obtaining high-purity isohexane, n-hexane products and heptane products.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a processing method of n-hexane, in particular to a production method of n-hexane containing heptane raw material (heptane content <50%). Background technique [0002] As a high value-added petrochemical product, hexane oil is widely used in food, medicine, chemical industry, metal processing, electronic instruments and other industries. In industrial production, its manufacture usually requires pre-treatment of production raw materials, and then a series of processes such as continuous rectification to finally obtain qualified hexane oil products. [0003] In recent years, due to the process adjustment of oil refining enterprises, the content of heavy components such as heptane in the current n-hexane raw material has gradually increased, thus increasing the processing load of the original n-hexane raw material, and it is difficult to meet the proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C07C7/00C07C7/04C07C9/15C07C9/16B01J23/755B01J35/10
CPCC07C7/005C07C7/04C07C4/06B01J23/755C07C2523/755B01J35/613B01J35/615B01J35/633C07C9/15C07C9/16
Inventor 韩明徐翠翠牛同治赵华柴丽娜李建伟娄豪
Owner 洛阳金达石化有限责任公司
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