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Solution preparation device of solid material, and method and system for removing peroxide in epsilon-caprolactone synthesis system

A technology for mixing solid materials and materials, applied in chemical instruments and methods, chemical/physical processes, dissolution, etc., can solve the problems of ε-caprolactone distillation, rectification and purification process safety hazards and other issues

Active Publication Date: 2020-10-30
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 major safety hazards to the subsequent distillation and rectification purification process of ε-caprolactone

Method used

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  • Solution preparation device of solid material, and method and system for removing peroxide in epsilon-caprolactone synthesis system
  • Solution preparation device of solid material, and method and system for removing peroxide in epsilon-caprolactone synthesis system
  • Solution preparation device of solid material, and method and system for removing peroxide in epsilon-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 20L mixing tank cylinder (7), so that the liquid forms a liquid seal on the reducing solid material inlet (8). Open the vacuum system (5), the 1.5kg sodium bisulfite solid powder weighed by the weighing system is passed through the suction pipe (12) of the filter screen (14), sucked into the feed pipe, and passed through the "reverse U-shaped After the pipeline (15) is picked up, it contacts with the liquid seal solution, and then is sucked into the mixing tank cylinder (7). After adding 11.5 kg of water, turn on the stirring paddle, control the stirring speed at 50-150 RPM, 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 exothermic dissolution. In order to prev...

Embodiment 2

[0082] Reducing solution configuration: first inject or suck 2kg of water into the mixing tank cylinder (7) with a capacity of 20L, so that the liquid forms a liquid seal on the reducing solid material inlet (8). Open the vacuum system (5), the 2kg sodium bisulfite solid powder weighed by the weighing system is passed through the suction pipe (12) equipped with the filter screen (14), sucked into the feed pipe, 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 cylinder body of the mixing kettle (7). After adding 12 kg of water, turn on the stirring paddle, control the stirring speed at 50-150 RPM, 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 exotherm...

Embodiment 3

[0085] Reducing solution configuration: first inject or suck 2kg of water into the mixing tank cylinder (7) with a capacity of 20L, so that the liquid forms a liquid seal on the reducing solid material inlet (8). Open the vacuum system (5), and the 2kg potassium bisulfite solid powder weighed by the weighing system is passed through the suction pipe (12) equipped with the filter screen (14), sucked into the feed pipe, 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 cylinder body of the mixing kettle (7). After adding 12 kg of water, turn on the stirring paddle, control the stirring speed at 50-150 RPM, and obtain an aqueous solution of reducing potassium bisulfite with a concentration of 12.5% ​​after stirring for 4 hours. During the stirring and dissolving process, due to dissolving heat, a certain amount of water vapor and potassium bisulfite will be decomposed to produce acid...

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Abstract

The invention provides a solution preparation system for a solid material, which can prevent dust from being generated in the preparation process of a reductive solid material solution, reduce the labor intensity and reduce the health injury of operators, and is suitable for continuous and automatic production. One vacuum system can be utilized to realize automatic feeding and stirring of variousmaterials and a plurality of mixing equipment, so that the equipment purchase and operation cost can be reduced while the mixing efficiency is improved. By a peroxide reduction equipment module, residual peroxide is removed, meanwhile, epsilon-caprolactone product loss is reduced, pollution gas emission is reduced through a volatile material recycling system, and the peroxide reduction equipment module is more economical and environmentally friendly. The invention also provides a method and device for removing peroxide in an epsilon-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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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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