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A kind of petroleum unpolymerized C5 extraction dechlorination method

A dechlorination and petroleum technology, used in extraction purification/separation, distillation purification/separation, etc., can solve the problems of high safety protection level, catalyst poisoning and deactivation, and high process pressure, so as to improve the utilization rate of raw materials and reduce dechlorination. The effect of low cost and equipment requirements

Active Publication Date: 2016-08-10
PUYANG XINYU PETROCHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrodechlorination process uses a lot of equipment, the process pressure is high, and the safety protection level is high. In the process of dechlorination, the catalyst is easily poisoned and deactivated, and the cost is very high.

Method used

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  • A kind of petroleum unpolymerized C5 extraction dechlorination method

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Embodiment 1

[0033] A method for extraction and dechlorination of petroleum unpolymerized C5, comprising the following steps:

[0034] Step (1): Turn on the circulating water of condenser Ⅰ;

[0035] Step (2): The unpolymerized C5 raw material passes through the preheater to control its temperature at 40°C, and enters the extraction tower from the 60 plates at the bottom. 80 plates enter the extraction tower, and the feed mass ratio of unpolymerized C5 raw material to DMF extractant is 1:1;

[0036]Step (3): When the liquid level of the reboiler I connected to the bottom of the extraction tower described in step (2) rises to 30%, turn on the high-temperature steam heating system I of the reboiler I and control its temperature to 80°C. The dechlorinated and unpolymerized C5 in the extraction tower is discharged from the top of the tower, condensed by the condenser I, and enters the collection tank I. When the liquid level in the collection tank I reaches 40%, the reflux pump I and the auto...

Embodiment 2

[0041] A method for extraction and dechlorination of petroleum unpolymerized C5, comprising the following steps:

[0042] Step (1): Turn on the circulating water of condenser Ⅰ;

[0043] Step (2): The unpolymerized C5 raw material passes through the preheater to control its temperature at 80°C, and enters the extraction tower from the 45 plates at the bottom. 60 plates enter the extraction tower, and the feed mass ratio of unpolymerized C5 raw material and DMF extractant in the tower is 1:10;

[0044] Step (3): When the liquid level of the reboiler I connected to the bottom of the extraction tower described in step (2) rises to 50%, turn on the high-temperature steam heating system I of the reboiler I and control its temperature to 130°C. The dechlorination and unpolymerized C5 in the extraction tower is discharged from the top of the tower, condensed by the condenser Ⅰ, and enters the collection tank Ⅰ. When the liquid level of the collection tank Ⅰ reaches 60%, the reflux p...

Embodiment 3

[0049] A method for extraction and dechlorination of petroleum unpolymerized C5, comprising the following steps:

[0050] Step (1): Turn on the circulating water of condenser Ⅰ;

[0051] Step (2): The unpolymerized C5 raw material passes through the preheater to control its temperature at 60°C, and enters the extraction tower from the 52 plates at the bottom, and the DMF extraction agent passes through the heat exchanger to control its temperature at 70°C, and the 70 plates enter the extraction tower, and the feed mass ratio of unpolymerized C5 raw material and DMF extractant in the tower is 1:5;

[0052] Step (3): When the liquid level of the reboiler I connected to the bottom of the extraction tower described in step (2) rises to 40%, turn on the high-temperature steam heating system I of the reboiler I and control its temperature to 100°C. The dechlorination and unpolymerized C5 in the extraction tower is discharged from the top of the tower, condensed by the condenser Ⅰ, ...

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Abstract

The invention discloses an extraction dechlorination method for petroleum unpolymerized C5. The method includes: firstly adding the unpolymerized C5 raw material and an extractant into an extraction tower, conducting treatment by the extraction tower to obtain dechlorinated unpolymerized C5 with Cl less than or equal to 10ppm, treating the residual component by a resolving tower to obtain high chlorine unpolymerized C5 with an extractant content of less than or equal to 50ppm, discharging the residue which is mostly the extractant component from the bottom of the resolving tower and letting it re-enter the extraction tower for recycle through a feed pipeline. The method solves the problem of dechlorination of C5 petroleum resin as a low-end product, after dechlorination, the chlorine content is less than or equal to 10ppm, and the dechlorination efficiency is high. Compared with the traditional hydrodechlorination process, the method uses fewer equipment, is easy to operate, has low equipment requirement, prolongs the service life of the equipment, and has high safety grade.

Description

technical field [0001] The invention belongs to the technical field of petroleum resin processing, and in particular relates to a method for extracting and dechlorinating petroleum unpolymerized C5. Background technique [0002] The comprehensive utilization method of the C5 fraction of ethylene cracking has been attracting attention, and the synthesis and preparation of C5 petroleum resin is particularly concerned. Functional resin, with an average relative molecular mass of 1000-3000, is yellow to light brown, and is widely used in adhesives, packaging materials, road marking paints, etc. Petroleum unpolymerized carbon five is the resin light oil extracted from petroleum resin after petroleum C5 is processed and polymerized. At present, C5 petroleum resin products are based on AlCl 3 Such as Lewis acid is used as a catalyst to polymerize, and all contain a certain amount of chlorine, with a content of 300-500 ppm. The presence of chlorine will affect the quality of the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/10C07C7/04
Inventor 贺纪刚裴存甫胡兴广孙兴邦魏自海赵明磊王冠宾高鹏
Owner PUYANG XINYU PETROCHEM IND
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