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A solution preparation device for solid materials, method and system for removing peroxide in ε-caprolactone synthesis system

A peroxide and synthesis system technology, applied in chemical instruments and methods, chemical/physical processes, dissolution, etc., can solve ε-caprolactone distillation, rectification and purification process safety hazards and other problems

Active Publication Date: 2021-11-09
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The residual peroxide is mixed with unreacted cyclohexanone and produced ε-caprolactone, which brings a major safety hazard to the subsequent distillation and rectification purification process of ε-caprolactone

Method used

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  • A solution preparation device for solid materials, method and system for removing peroxide in ε-caprolactone synthesis system
  • A solution preparation device for solid materials, method and system for removing peroxide in ε-caprolactone synthesis system
  • A solution preparation device for solid materials, method and system for removing peroxide in ε-caprolactone synthesis system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Reducing solution configuration:

[0079] First, inject or suck 2kg of water into the material mixing kettle (7) with a capacity of 20L, so that the liquid forms a liquid seal on the reducing solid material inlet (8). Turn on the vacuum system (5), and the 1.5kg sodium bisulfite solid powder weighed by the weighing system will be sucked into the feeding pipe through the suction pipe (12) equipped with a filter screen (14), and passed through the "reverse U-shaped "After the pipeline (15) is raised, it contacts with the liquid seal solution, and then is sucked into the material mixing tank (7). After adding 11.5kg of water, turn on the stirring paddle, control the stirring speed at 50-150RPM, and obtain a reducing sodium bisulfite aqueous solution with a concentration of 10% after stirring for 2 hours. During the stirring and dissolving process, a certain amount of water vapor and sodium bisulfite will be decomposed to produce acidic sulfur dioxide gas due to the exothe...

Embodiment 2

[0082] Reducing solution configuration: first inject or suck 2kg of water into the material mixing kettle (7) with a capacity of 20L, so that the liquid forms a liquid seal on the reducing solid material inlet (8). Turn on the vacuum system (5), and suck 2kg of sodium bisulfite solid powder weighed by the weighing system through the suction pipe (12) equipped with a filter screen (14), into the feeding pipe, and pass through the "reverse U-shaped" After the pipeline (15) is raised, it contacts with the liquid seal solution, and then is sucked into the material mixing tank (7). After adding 12kg of water, turn on the stirring paddle, control the stirring speed at 50-150RPM, and obtain a reducing sodium bisulfite aqueous solution with a concentration of 12.5% ​​after stirring for 4 hours. During the stirring and dissolving process, a certain amount of water vapor and sodium bisulfite will be decomposed to produce acidic sulfur dioxide gas due to the exothermic dissolution. In or...

Embodiment 3

[0085] Reducing solution configuration: first inject or suck 2kg of water into the material mixing kettle (7) with a capacity of 20L, so that the liquid forms a liquid seal on the reducing solid material inlet (8). Turn on the vacuum system (5), suck the 2kg potassium bisulfite solid powder weighed by the weighing system through the suction pipe (12) equipped with a filter screen (14), into the feeding pipe, and pass through the "reverse U-shaped" After the pipeline (15) is raised, it contacts with the liquid seal solution, and then is sucked into the material mixing tank (7). After adding 12 kg of water, turn on the stirring paddle, control the stirring speed at 50-150 RPM, and obtain a reducing potassium bisulfite aqueous solution with a concentration of 12.5% ​​after stirring for 4 hours. During the stirring and dissolving process, a certain amount of water vapor and potassium bisulfite will be decomposed to produce acidic sulfur dioxide gas due to the exothermic dissolutio...

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Abstract

The invention provides a solution preparation system for solid materials. The invention uses the reducing solution preparation system to avoid dust generation during the preparation process of the reducing solid material solution, reduce labor intensity, and reduce health injuries of operators. It is suitable for continuous , automatic production; and a vacuum system can be used to realize automatic feeding and mixing of multiple materials and multiple mixing equipment, which can reduce equipment purchase and operating costs while improving mixing efficiency. The peroxide reduction equipment module reduces the loss of ε-caprolactone products while removing residual peroxides, and at the same time uses the volatile material recovery system to reduce polluting gas emissions, which is more economical and environmentally friendly. The invention also provides a method and a device for removing peroxide in the ε-caprolactone synthesis system.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a solid material solution preparation device, a method for removing peroxide in an ε-caprolactone synthesis system, and a removal device. Background technique [0002] As an important fine chemical product, ε-caprolactone is widely used. On the one hand, polycaprolactone material has excellent biocompatibility and absorbability, and has been approved by the US FDA for implantation into the human body. The application prospect of high value-added medical materials is broad. With the continuous expansion of the application field of ε-caprolactone, the research on its synthesis method is constantly innovating. [0003] At present, the synthesis method of ε-caprolactone suitable for large-scale production and application is mainly the catalytic oxidation method of cyclohexanone. After the method finishes the reaction, a certain amount of peroxide usually rem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F13/04B01F1/00B01F15/00B01F13/06B01J19/18C07D313/04B01F35/60
CPCB01J19/18C07D313/04B01F21/10B01F35/605B01F33/70B01F35/184B01F35/189
Inventor 孙志强张涵庞烜孙海波李帅段然龙陈学思
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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