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A kind of industrial preparation system and preparation method of propylene glycol phenyl ether

A technology for propylene glycol phenyl ether and a preparation system, which is applied in the chemical industry and can solve the problems such as difficulty in obtaining raw materials, difficult wastewater treatment, complicated preparation of alkali catalysts and the like

Active Publication Date: 2019-11-22
谦信化工集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned methods all have problems such as complex preparation of alkali catalysts, difficulty in obtaining raw materials, and difficulty in wastewater treatment.

Method used

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  • A kind of industrial preparation system and preparation method of propylene glycol phenyl ether
  • A kind of industrial preparation system and preparation method of propylene glycol phenyl ether

Examples

Experimental program
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preparation example Construction

[0071] Such as figure 2 As shown, the specific examples of the present invention provide the preparation method of the above-mentioned propylene glycol phenyl ether preparation system, and the method comprises the following steps:

[0072] (1) Phenol and propylene oxide are added in the reactor to carry out constant temperature reaction for the first time, add solid basic catalyst after the first constant temperature reaction and carry out the second time constant temperature reaction;

[0073] (2) The material after the second constant temperature reaction is backflushed and extracted with an acid solution, and then phase-separated to obtain an upper organic phase and a lower aqueous phase;

[0074] (3) The upper organic phase obtained in step (2) is subjected to secondary rectification to obtain the product propylene glycol phenyl ether, and the lower aqueous phase obtained in step (2) is subjected to wastewater treatment.

Embodiment 1

[0076] This embodiment provides a kind of preparation system of propylene glycol phenyl ether, and described system comprises reactor 1, acid tower 2, phase separator 3, first rectification tower 4, tower top phase separator 5 and second rectification tower 6, wherein the reaction kettle 1, the acid tower 2 and the phase separator 3 are connected in sequence, the organic phase outlet of the phase separator 3 is connected with the feed port of the first rectification tower 4, and the top material outlet of the first rectification tower 4 is It is connected with the inlet of the top phase separator 5, and the organic phase outlet of the top phase separator 5 is connected with the feed port of the reaction device and the feed port of the second rectifying tower 6.

[0077] Wherein, the acidic tower 2 is filled with acid liquid, the first rectifying tower 4 is a vacuum rectifying tower, and the second rectifying tower 6 is an atmospheric rectifying tower.

Embodiment 2

[0079] In this example, the system described in Example 1 is used to prepare propylene glycol phenyl ether. The solid basic catalyst used in this example is a composition of sodium hydroxide and magnesium hydroxide, wherein the content of sodium hydroxide is 30wt%, and the content of magnesium hydroxide The content of the catalyst is 70wt%; the solid basic catalyst is obtained after ball milling for 5 hours and then screened with a 0.1 mm sieve.

[0080] The preparation method of described propylene glycol phenyl ether comprises the following steps:

[0081] (1) Add 940kg of phenol into the reaction kettle 1, add 1410kg of solid basic catalyst under stirring conditions to carry out the first constant temperature reaction at 30-40°C, react for 1h, and then react under stirring conditions after the first constant temperature reaction Add 1470kg of propylene oxide to the kettle, the solution is yellow at this time, carry out the second constant temperature reaction at 120°C, reac...

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Abstract

The invention provides an industrial preparation system and a preparation method for propylene glycol phenyl ether. The system comprises a reaction kettle, an acid tower, a phase splitter, a first rectifying tower, a tower top phase splitter and a second rectifying tower. The reaction kettle, the acid tower and the phase splitter are connected sequentially, an organic phase outlet of the phase splitter is connected with a feeding port of the first rectifying tower, a tower top material outlet of the first rectifying tower is connected with an inlet of the tower top phase splitter, and an organic phase outlet of the tower top phase splitter is connected with a feeding port of a reaction device and a feeding port of the second rectifying tower. Raw materials including propylene epoxide and phenol and a solid alkali catalyst are adopted for preparing the propylene glycol phenyl ether by two-stage temperature control reaction. The method has advantages that neither a pressurizing environment nor an inert environment is required, technical simplicity in preparation, few by-products, low preparation cost and extensive sources of raw materials and catalysts are realized.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a preparation system and a preparation method of propylene glycol phenyl ether, in particular to an industrial preparation system and a preparation method of propylene glycol phenyl ether. Background technique [0002] With the progress of society, coatings are becoming more and more important in today's life and work. Among them, the proportion of VOC in common solvent-based coatings is as high as 40%, but the prospect of VOC coatings in the future is not sustainable, and the market share will gradually shrink. The reasons are as follows: [0003] From a legal point of view, countries around the world have promulgated laws and regulations on VOC emissions, and they are becoming more and more stringent. my country is also gradually in line with international standards, and relevant laws have been promulgated one after another: such as the Ministry of Environmental Protec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C41/03C07C41/34C07C41/42C07C43/23
CPCC07C41/03C07C41/34C07C41/42C07C43/23
Inventor 赵楚榜于冬娥董杨
Owner 谦信化工集团有限公司