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Morpholine dehydration auxiliary agent, and preparation method and application thereof

A dehydration aid, morpholine technology, applied in the field of morpholine dehydration aid and its preparation, can solve the problems of reduced circulation of mother liquor, inability to use, difficult to handle, etc., and achieve the effect of shortening dehydration time and reducing energy consumption

Active Publication Date: 2019-10-15
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this new technology compared to previous methods described earlier can be improved efficiency while reducing power usage over conventional processes.

Problems solved by technology

Technological Problem: Traditional methods involve removing excessive moisture (water) during chemical processes such as making neon signs on paper products like tires made through nitrile polymers. However this results in wasted material and increased costs associated therewith.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a chemical factory producing rubber additives in Zhejiang, the morpholine mother liquor was dehydrated by rectification method, and the reflux ratio was about 7. Later, it was adjusted to dehydrate by adding dehydration aids to extraction.

[0023] The water content in the morpholine mother liquor is 15.0±0.2%, and after concentration by vacuum distillation and solid-liquid separation, the water content in the morpholine mother liquor is 19.5±0.2%. According to the process water balance calculation, the water content in the mother liquor after dehydration reaches 5% and can be reused.

[0024] Preparation of dehydration aid: Take potassium hydroxide, sodium hydroxide, and organic base, add them according to the mass ratio of 10:10:1, and configure them into a 50% aqueous solution, in which organic bases are sodium methylate, sodium ethylate, tert-butanol Sodium, configured according to the mass ratio of 7:2:1.

[0025] Extraction process: Add the prepared dehydratio...

Embodiment 2

[0031] For a pharmaceutical intermediate company in Sichuan, since the morpholine mother liquor contains heat-sensitive raw materials, the dehydration process cannot exceed 60°C, so the conventional distillation method is not suitable for the dehydration of this system.

[0032] The water content in the morpholine mother liquor is 12.0±0.2%, and after concentration by vacuum distillation and solid-liquid separation, the water content in the morpholine mother liquor is 13.5±0.2%. Through the process water balance calculation, the water content in the mother liquor after dehydration reaches 2% for reuse.

[0033] Preparation of dehydration aid: Take potassium hydroxide, sodium hydroxide, and organic base, add them according to the mass ratio of 10:2:0.4, and configure them into a 45% aqueous solution, in which potassium tert-butoxide is used as the organic base.

[0034] Extraction process: Add the prepared dehydration aid to the morpholine mother liquor, stand and separate to o...

Embodiment 3

[0036] A special chemical additive company in Zhejiang, due to the expansion of the production line, the efficiency of the original dehydration process has not met the current requirements, and rapid rough dehydration is required.

[0037] The water content in the morpholine mother liquor is 1.8±0.2%, and after being concentrated by vacuum distillation and solid-liquid separation, the water content in the morpholine mother liquor is 5.6±0.2%. Through process water balance calculation, the water content in the mother liquor after dehydration reaches 1% for reuse.

[0038] Preparation of dehydration aid: Take potassium hydroxide, sodium hydroxide, and organic base, add them according to the mass ratio of 10:20:3, and configure them into a 50% aqueous solution, wherein the organic base is potassium tert-butoxide.

[0039] Extraction process: Add the prepared dehydration aid to the morpholine mother liquor, stand and separate to obtain an oil phase and a water phase, the water con...

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PUM

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Abstract

The invention provides a morpholine dehydration auxiliary agent, and a preparation method and an application thereof, and belongs to the technical field of auxiliary agents. The dehydration auxiliaryagent is a mixed solution formed with water as a solvent and taking one or more of sodium hydroxide, potassium hydroxide, sodium methoxide, potassium methoxide, sodium ethoxide, potassium ethoxide, sodium tert-butoxide and potassium tert-butoxide as active components. The invention also provides a preparation method and application of the dehydration auxiliary agent. The dehydration auxiliary agent is used for dehydrating morpholine in an extraction layering manner: mixing the dehydration auxiliary agent with morpholine mother liquor, and standing the mixture for layering an oil phase and a water phase. When the dehydration aid is used for dehydrating morpholine, water in morpholine can be removed from 20% to 1% or below. A dehydration auxiliary agent is adopted to replace a traditional rectification method for dehydration, energy consumption is reduced by 50% or above, and dehydration time is shortened by 50% or above.

Description

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Claims

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Application Information

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Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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