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Production system and production method of aromatic hydrocarbon solvent having wide distilling range, low chromaticity and high boiling point

A high-boiling point aromatics, production system technology, applied in chemical instruments and methods, separation methods, hydrocarbon oil treatment products, etc. Process, process environmental protection, no pollution, ensure the effect of chromaticity

Active Publication Date: 2019-08-30
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to control the distillation range of existing high-boiling aromatic hydrocarbon solvents, and the chromaticity cannot be controlled, which is greatly affected by raw materials
The distillation range of the raw material directly affects the distillation range of the product, and the content of olefins in the raw material cannot be effectively controlled, which may easily lead to unqualified color numbers

Method used

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  • Production system and production method of aromatic hydrocarbon solvent having wide distilling range, low chromaticity and high boiling point
  • Production system and production method of aromatic hydrocarbon solvent having wide distilling range, low chromaticity and high boiling point
  • Production system and production method of aromatic hydrocarbon solvent having wide distilling range, low chromaticity and high boiling point

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The production system of wide distillation range, low color and high boiling point aromatic hydrocarbon solvent includes:

[0074] The first rectification tower, the middle part of the first rectification tower is provided with a C9+ fraction raw material inlet, the top of the first rectification tower is provided with a first overhead distillate outlet, and the first rectification tower The bottom is provided with a first bottom distillate outlet;

[0075] The first overhead distillate outlet is sequentially connected to the first condenser and the first reflux tank, the first reflux tank is provided with a first material outlet, and the first material outlet is provided with a first three-way valve, One end of the first three-way valve is connected to a pipeline connected to the first rectification tower, and the other end is connected to a pipeline leading out high-octane oil-adjusting components.

[0076] The second rectifying tower, the middle part of the second r...

Embodiment 2

[0085] The invention discloses a method for producing an aromatic hydrocarbon solvent with a wide distillation range, low color and high boiling point, which is produced by a rectification process under reduced pressure.

[0086] The specific steps are:

[0087] (1) Carry out rectification and separation of the C9+ cut raw material from the middle part of the feed in the first rectification tower to obtain the first overhead distillate, which is communicated with the first condenser at the top of the first rectification tower After condensing, it enters the first reflux tank connected with the first condenser, and is drawn out as a high-octane oil adjustment component;

[0088] (2) The bottom distillate of the first rectification tower is rectified and separated from the middle feed in the second rectification tower to obtain the second overhead distillate, which is combined with the second rectification The second condenser connected to the top of the tower is condensed and ...

Embodiment 3

[0098] The invention discloses a method for producing an aromatic hydrocarbon solvent with a wide distillation range, low color and high boiling point, which is produced by a rectification process under reduced pressure.

[0099] The specific steps are:

[0100] (1) Carry out rectification and separation of the C9+ cut raw material from the middle part of the feed in the first rectification tower to obtain the first overhead distillate, which is communicated with the first condenser at the top of the first rectification tower After condensing, it enters the first reflux tank connected with the first condenser, and is drawn out as a high-octane oil adjustment component;

[0101] (2) After fully mixing the bottom distillate of the first rectification tower and the C10+ heavy aromatics from the reforming unit, enter the middle part of the second rectification tower, and carry out in the second rectification tower The rectification separates the second overhead distillate, which ...

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Abstract

The invention provides a method for producing an aromatic hydrocarbon solvent having wide distilling range, low chromaticity and high boiling point. The production method of the aromatic hydrocarbon solvent having wide distilling range, low chromaticity and high boiling point of the invention includes the steps of guiding a C9+ fraction raw material into a first rectification column for rectifyingand removing a light component, then separating a first solvent product from a second solvent crude product through a second rectification column, and finally separating a second solvent product froma colored heavy component by a third rectification column; meanwhile, precisely controlling the rectification operating pressure, temperature and reflux ratio of each distillation column, which can greatly widen the distilling range of a first aromatic hydrocarbon solvent obtained, and can also effectively ensure the chromaticity of a second aromatic hydrocarbon solvent; each step performed is arectification step, no waste is discharged, and the process is environmentally friendly and non-polluting.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a production system and production method of aromatic hydrocarbon solvent with wide distillation range, low chroma and high boiling point. Background technique [0002] In recent years, with the improvement of the capacity of the chemical industry such as oil refining and coal chemical industry, the production capacity of the corresponding large-scale combined aromatics unit has continued to increase, which has greatly increased the output of heavy aromatics at home and abroad. How to make full use of these heavy aromatics and create high economic benefits has become a focus of great concern and research and development in the industry. C9+ fractions generally refer to heavy aromatics fractions composed of C9 aromatics and C9+ aromatics, which mainly come from catalytic reforming units, ethylene cracking units, hydrocracking units and high-temperature c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/14B01D3/32B01D3/42C10G7/00C10G7/12
CPCB01D3/143B01D3/322B01D3/4205C10G7/00C10G7/12C10G2300/305C10G2300/4006C10G2300/4012C10G2400/18C10G2400/30
Inventor 曹峰马韵升吴文雷王启超苏鹏飞姜修义郭田赵德明
Owner CHAMBROAD CHEM IND RES INST CO LTD
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