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Trimethylol ethane three-effect evaporation concentration crystallization system and application thereof

A technology of trimethylolethane and three-effect evaporation, which is applied in evaporation separation crystallization, multi-effect evaporation, solution crystallization and other directions, can solve problems such as restricting the application and development of trimethylolethane, cumbersome purification process, poor product quality, etc. problems, to achieve the effect of shortening the purification process route, low steam energy consumption, and low production cost

Pending Publication Date: 2019-03-29
无锡荣丰生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Trimethylolethane is separated and purified by crystallization. The existing trimethylolethane purification process is cumbersome, the yield is low, the product quality is poor, and the production cost is high, which has seriously restricted the production of trimethylolethane. Application Development of Ethane

Method used

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  • Trimethylol ethane three-effect evaporation concentration crystallization system and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a trimethylolethane three-effect evaporation concentration crystallization system includes a first-effect evaporator 1, a second-effect evaporator 2, a three-effect evaporator 3, a first-effect crystallizer 4, a second-effect crystallizer 5, and a three-effect evaporator. Effect crystallizer 6, primary heat exchanger 7, secondary heat exchanger 8, first-effect circulation pump 9, first-effect discharge pump 10, second-effect circulation pump 11, second-effect discharge pump 12, three-effect circulation pump 13 , Three-effect discharge pump 14, condenser 15, vacuum pump 16, first-stage condensate water tank 17, second-stage condensate water tank 18, third-stage condensate water tank 19, first-stage condensate water pump 20, second-stage condensate water pump 21, third-stage Condensate water pump 22, heat exchanger 23;

[0028] The first-effect evaporator 1 forms a circulation passage with the first-effect crystallizer 4 and the first-effect ci...

Embodiment 2

[0037] The method for the concentrated crystallization of trimethylolethane by the trimethylolethane three-effect evaporation concentration crystallization system is as follows:

[0038] (1) Vacuuming: Open the circulating water inlet and circulating water outlet valves of the condenser 15, pass the circulating water into the condenser 15, turn on the vacuum pump 16 for vacuuming, open the first-effect evaporator 1, the second-effect evaporator 2, and the third-effect evaporator Efficient evaporator 3, primary heat exchanger 7, secondary heat exchanger 8, condenser 15 and vacuum valves, so that the pressure in all parts of the system reaches the target value;

[0039] (2) Feeding: Feed into the three-effect evaporator 3 through the feed pipe through the heat exchanger 23, start the three-effect circulation pump 13 and the three-effect discharge pump 14 to circulate, and pass the feed liquid through the three-effect discharge pump 14 is transported to the secondary heat exchang...

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Abstract

The invention relates to a trimethylol ethane three-effect evaporation concentration crystallization system and application thereof, and belongs to the technical field of concentration crystallization, wherein a one-effect evaporator forms a circulation path with a one-effect crystallizer and a one-effect circulation pump through pipelines; a two-effect evaporator forms a circulation path with a two-effect crystallizer and a two-effect circulation pump through pipelines; a three-effect evaporator forms a circulation path with a three-effect crystallizer and a three-effect circulation pump through pipelines; a heat exchanger feeding opening is communicated with a feeding pipeline; a discharging opening is communicated with a feeding opening of the three-effect evaporator through a pipeline.The design and the invention are performed by aiming at the production process and features of trimethylol ethane; a set of trimethylol ethane three-effect evaporation concentration crystallization system and a method for performing trimethylol ethane three-effect evaporation concentration crystallization by using the system are developed. An evaporation concentration technology, a multi-effect evaporation technology and an evaporation crystallization technology are effectively combined; the purification process route of the trimethylol ethane is greatly shortened.

Description

technical field [0001] The invention relates to a trimethylolethane three-effect evaporation concentration crystallization system and its application, belonging to the technical field of concentration crystallization. Background technique [0002] Trimethylolethane (TME for short) is an odorless, free-flowing, white crystalline solid. It is an important reactive polyol intermediate and fine chemical product. Covering agent. In recent years, it has also received widespread attention as a phase-change heat storage material. Trimethylolethane can provide excellent stability, improve heat, light, hydrolysis and oxidation properties, and has outstanding weather resistance, gloss and resistance Chemical properties, the application field has been extended to medical treatment, health care, automobile, military and so on. [0003] As the market demand for this product continues to increase, higher requirements are placed on the purity and particle size of the product. Trimethylol...

Claims

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Application Information

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IPC IPC(8): B01D9/02B01D1/26C07C29/78C07C31/22
CPCB01D1/26B01D9/0031B01D9/0059C07C29/78C07C31/22
Inventor 杭新健周旭波张雪阳
Owner 无锡荣丰生物工程有限公司
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