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Processing method of DCP (dicumyl peroxide) crystallization mother liquor

A crystallization mother liquor, crystallization technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of peroxy compounds, etc., can solve the problems of increasing unsafe factors in distillation, increasing consumption of cumene, difficulty in sewage treatment, etc. Safety, easy sewage treatment, and effect of reducing sewage treatment volume

Active Publication Date: 2014-05-21
CHINA PETROCHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The extraction-distillation method of the prior art has the following problems, which cannot be solved even by adjusting the amount of extractant (water):
[0009] 1. The separation of the DCP mother liquor is not clear during the extraction process. Even if the water layer is completely separated from the oil layer by heating or other methods, a certain amount of oil phase is dissolved in the water layer
[0010] 2. After distilling and recovering ethanol from the water layer to the alcohol tower, the tower liquid contains oil, which makes subsequent sewage treatment difficult. On the other hand, this part of oil is transformed from cumene, thus increasing the consumption of cumene
[0011] 3. After distilling and recovering ethanol from the water layer to the alcohol tower, most of the oil contained in the bottom liquid of the tower is DCP, which will increase the unsafe factors in the distillation process
However, the washing method of this patent application is carried out for the oil layer after the dicumyl peroxide mother liquor is extracted to separate the alcohol solvent, so it actually includes the step of liquid-liquid extraction

Method used

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  • Processing method of DCP (dicumyl peroxide) crystallization mother liquor
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  • Processing method of DCP (dicumyl peroxide) crystallization mother liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1 Vacuum distillation

[0051] The composition of DCP crystallization mother liquor (excluding moisture) is about: 64.0% ethanol, 17.6% cumene, 0.3% phenol, 2.3% methyl styrene, 3.8% acetophenone, 2.5% dimethyl benzyl alcohol, 9% DCP .

[0052] Using the DCP crystallization mother liquor as a raw material, vacuum distillation was carried out in a vacuum tower, and the conditions and results of the vacuum distillation are shown in Table 1.

[0053] Table 1 Conditions and results of vacuum distillation a

[0054]

[0055] Note: a There is no water in the kettle liquid, and the distillate has water but it is not included in the composition;

[0056] b Expressed as a ratio relative to the amount of feed (including moisture).

[0057] There is no obvious darkening of the color of the kettle liquid, which shows that under the conditions of the method of the present invention, DCP does not decompose substantially, and the operation is safe and controllable. ...

Embodiment 2

[0059] Example 2 Alcohol distillation

[0060] Using the distillate from the vacuum tower as the raw material, carry out atmospheric distillation in the alcohol column, the conditions and results of the atmospheric distillation are shown in Table 2.

[0061] Table 2 Conditions and results of atmospheric distillation

[0062]

[0063] The composition of the recovered alcohol in the prior art is about ethanol / cumene / water=88.1 / 5.1 / 6.7, which is basically equivalent in the present invention.

[0064] In the prior art, 40 tons of waste water is produced every day from the liquid in the alcohol tower. The waste water is emulsified and turbid, and the COD is as high as 150,000 mg / L. After standing for a long time, oil droplets will be precipitated, and the separated oil accounts for 1.1% to 1.3% of the total. , the main components are dimethyl benzyl alcohol, DCP, acetophenone and so on. The invention hardly produces sewage, with an average of less than 100 kilograms of sewag...

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Abstract

The invention relates to a processing method of DCP (dicumyl peroxide) crystallization mother liquor using ethanol as a crystallization solvent, the processing method includes the step of reduced pressure distillation of the DCP crystallization mother liquor in the conditions of the kettle liquid temperature being lower than 100 DEG C to obtain a distillate containing the ethanol but basically containing no DCP and a kettle liquid basically containing no ethanol. By the processing method of the DCP (dicumyl peroxide) crystallization mother liquor, the recovery rates of isopropylbenzene and DCP can be improved, the wastewater quantity can be reduced, and / or the subsequent wastewater treatment can be easier, and / or the alcohol tower safety can be improved.

Description

technical field [0001] The invention relates to a new method for treating dicumyl peroxide (DCP) crystallization mother liquor, more particularly to a method for treating DCP crystallization mother liquor with ethanol as a crystallization solvent. Background technique [0002] DCP is an organic peroxide crosslinking agent, mainly used as a crosslinking agent for various olefin polymers and copolymers (such as polyethylene, chlorinated polyethylene, silicone rubber, etc.) and a polymerization initiator for polystyrene , It can also be used as curing agent for unsaturated polyester resin. After DCP is crosslinked, the physical properties of the polymer are greatly improved, and the heat resistance, chemical resistance, pressure resistance, crack resistance and mechanical strength are all increased. DCP is widely used in wire and cable, shoemaking, building materials and other industries. In recent years, with the continuous expansion of the polymer material market, the demand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C409/16C07C407/00C07C31/08C07C29/80
Inventor 吴成跃潘新民陈志坚
Owner CHINA PETROCHEMICAL CORP