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Method for separating cyclohexane from oil product

A cyclohexane and oil technology, applied in chemical instruments and methods, purification/separation of hydrocarbons, distillation purification/separation, etc., can solve problems such as high risk factor, high cost, and inability to obtain high-purity cyclohexane, and achieve safety High performance, strong raw material adaptability, and the effect of increasing added value and utilization rate

Pending Publication Date: 2020-10-30
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, cyclohexane is mostly produced by hydrogenation of benzene, and high-purity cyclohexane cannot be obtained through separation
Benzene hydrogenation is a high-pressure operation with a high risk factor. The basic ton of hydrogen consumption is about 1,000 yuan, and the cost is high.

Method used

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  • Method for separating cyclohexane from oil product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for separating hexanaphthene in an oil product, the concrete steps are:

[0025] (1) Pre-cutting the reformed C6 oil to remove light and remove weight to obtain C6 fractions;

[0026] The top temperature of the light removal tower is 71.29°C, the bottom temperature of the extractive distillation tower is 89.14°C, the top pressure (absolute) of the extractive distillation tower is 120KPa; the top temperature of the heavy removal tower is 77.42°C, and the bottom temperature of the solvent recovery tower is 88.48°C, The solvent recovery tower top pressure (absolutely) is 120KPa;

[0027] The reformed C6 passes through the light removal tower to obtain the bottom component of the light removal tower, and then enters the weight removal tower to obtain the top component, which is the C6 fraction;

[0028] (2) Mix the C6 fraction (feeding in the middle and lower part) with solvent A (the feeding in the middle and upper part) in the extractive distillation tower, rect...

Embodiment 2

[0036] A method for separating hexanaphthene in an oil product, the concrete steps are:

[0037] (1) Pre-cutting the reformed C6 oil to remove light and remove weight to obtain C6 fractions;

[0038] The top temperature of the light removal tower is 71.29°C, the bottom temperature of the extractive distillation tower is 89.14°C, and the top pressure (absolute) of the extractive distillation tower is 120KPa;

[0039] The temperature at the top of the weight removal tower is 77.42°C, the temperature at the bottom of the solvent recovery tower is 88.48°C, and the pressure at the top of the solvent recovery tower (absolutely) is

[0040] 120KPa;

[0041] (2) Mix the C6 fraction (feeding in the middle and lower part) with solvent A (the feeding in the middle and upper part) in the extractive distillation tower, rectify and separate, and obtain the tower top component as low solvent content raffinate phase raffinate and tower The bottom component is a solvent-rich extraction phase...

Embodiment 3

[0049] A method for separating hexanaphthene in an oil product, the concrete steps are:

[0050] (1) Pre-cutting the reformed C6 oil to remove light and remove weight to obtain C6 fractions;

[0051] The temperature at the top of the light removal tower is 71.4°C, the temperature at the bottom of the extractive distillation tower is 89.5°C, and the top pressure (absolute) of the extractive distillation tower is 120KPa;

[0052] The temperature at the top of the weight removal tower is 78.2°C, the temperature at the bottom of the solvent recovery tower is 88.9°C, and the pressure (absolute) at the top of the solvent recovery tower is 120KPa;

[0053] (2) C6 fraction is mixed with solvent A in the extractive distillation tower, and rectification is separated, and the tower top component that obtains is low solvent content raffinate phase raffinate and tower bottom component is rich solvent extraction phase;

[0054] (3) Carry out rectification and separation in the solvent reco...

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Abstract

The invention belongs to the technical field of petrochemical engineering and particularly relates to a method for separating cyclohexane from an oil product. According to the production method, the reformed C6 oil is treated to obtain a C6 fraction, then extractive distillation is carried out to separate the C6 fraction, the 2, 4-dimethylpentane component which is nearly boiled with cyclohexane in the raw material can be effectively removed, and the production method is low in investment and operation cost, high in raw material adaptability, environmentally friendly and free of pollution.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a method for separating cyclohexane from oil products. Background technique [0002] Cyclohexane is used to prepare cyclohexanol, cyclohexanone, caprolactam, adipic acid and nylon 6, etc. Cyclohexane is mainly used to manufacture cyclohexanol and cyclohexanone (approximately 90%), and further produces adipic acid and caprolactam. They are the monomers used to produce polyamides. A small amount is used as an industrial and paint solvent, and is an excellent solvent for resins, fats, paraffin oils, butyl rubber, etc. In addition, cyclohexane is also used in the pharmaceutical industry for the synthesis of pharmaceutical intermediates. Cyclohexane is especially suitable as a solvent for styrene-butadiene rubber, and its consumption is generally more than 4 times that of the feeding amount. 90% of cyclohexane is used in the production of cyclohexanone, ...

Claims

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Application Information

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IPC IPC(8): C07C7/00C07C7/08C07C13/18
CPCC07C7/005C07C7/08C07C2601/14C07C13/18
Inventor 房峰闫燕张强苏鹏飞王启超吴文雷史会兵
Owner CHAMBROAD CHEM IND RES INST CO LTD
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