Process method of using micro reactor for continuously producing 2,2-dimethylolpropionic acid

A dimethylolpropionic acid, microreactor technology, applied in chemical instruments and methods, chemical/physical/physical-chemical reactors, carboxylate preparation, etc., can solve the complex production process, difficult post-processing, labor-intensive It can reduce the number of operators, the production process is safe and efficient, and the waste water discharge can be reduced.

Inactive Publication Date: 2019-10-08
昆山复希工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the shortcomings of complex production process, low yield, difficult post-treatment, high labor intensity, large amount of waste water and high energy consumption in the prior art, and proposes a continuous production of 2, The process of 2-dimethylolpropionic acid

Method used

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  • Process method of using micro reactor for continuously producing 2,2-dimethylolpropionic acid
  • Process method of using micro reactor for continuously producing 2,2-dimethylolpropionic acid
  • Process method of using micro reactor for continuously producing 2,2-dimethylolpropionic acid

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Embodiment 1

[0030] Embodiment 1, a kind of process that uses microreactor to continuously produce 2,2-dimethylolpropionic acid comprises the steps:

[0031] S1, formaldehyde, propionaldehyde and triethylamine metered and quantified by metering pumps are pumped into the mixer for forced mixing, the concentration of formaldehyde is 37%, the concentration of propanol is 99%, triethylamine, formaldehyde and propionaldehyde The flow rates are 250ml / min, 2000ml / min, and 777ml / min respectively, and the flow rates of triethylamine, formaldehyde and propionaldehyde are all 0.1m / s, the reaction temperature is 70°C, the pressure is 0.2MPa, and the reaction residence time is 100 seconds , triethylamine and hydrogen peroxide can be recovered by low boiling, and then enter the microreactor for condensation reaction to obtain a reaction solution mainly containing 2,2-dimethylolpropanal. The material of the mixer and the microreactor is glass Any one or more of stainless steel, resin and silicon carbide,...

Embodiment 2

[0035] Embodiment 2, a kind of processing method that uses microreactor to continuously produce 2,2-dimethylol propionic acid, comprises the steps:

[0036] S1. Formaldehyde, propionaldehyde and triethylamine are pumped into the mixer for forced mixing with a metering pump. The concentration of formaldehyde is 37%, and the concentration of propanol is 99%. Triethylamine, formaldehyde and propionaldehyde The flow rates are 250ml / min, 2000ml / min, and 777ml / min respectively, and the flow rates of triethylamine, formaldehyde and propionaldehyde are all 0.3m / s, the reaction temperature is 90°C, the pressure is 0.4MPa, and the reaction residence time is 120 seconds , triethylamine and hydrogen peroxide can be recovered by low boiling, and then enter the microreactor for condensation reaction to obtain a reaction solution mainly containing 2,2-dimethylolpropanal. The material of the mixer and the microreactor is glass Any one or more of stainless steel, resin and silicon carbide, a h...

Embodiment 3

[0040] Embodiment 3, a kind of process method that uses microreactor to continuously produce 2,2-dimethylol propionic acid, comprises the steps:

[0041]S1. Formaldehyde, propionaldehyde and triethylamine are pumped into the mixer for forced mixing with a metering pump. The concentration of formaldehyde is 37%, and the concentration of propanol is 99%. Triethylamine, formaldehyde and propionaldehyde The flow rates are 250ml / min, 2000ml / min, and 777ml / min respectively, and the flow rates of triethylamine, formaldehyde and propionaldehyde are all 0.5m / s, the reaction temperature is 110°C, the pressure is 0.6MPa, and the reaction residence time is 150 seconds , triethylamine and hydrogen peroxide can be recovered by low boiling, and then enter the microreactor for condensation reaction to obtain a reaction solution mainly containing 2,2-dimethylolpropanal. The material of the mixer and the microreactor is glass Any one or more of stainless steel, resin and silicon carbide, a heat...

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Abstract

The invention relates to the technical field of organic chemical industry, in particular to a process method of using a micro reactor for continuously producing 2,2-dimethylolpropionic acid. The process method comprises the following steps that S1, formaldehyde, propionaldehydeandtriethylamine are metered by a metering pump and pumped in a mixer for forced mixing, then enter into the micro reactorfor condensation reaction, and a reaction liquid mainly containing 2,2-dihydroxymethylpropanal is obtained; and S2, the reaction liquid mainly containing 2,2-dihydroxymethylpropanal obtained in the step 1 is taken to be continuously distilled and concentrated through a film rotary evaporator, raw materials are forced to mix through the mixer and then enter the micro reactor, thus reaction is advantageously conducted, the occurrence of side reaction is reduced, especially the generation of by-products of trimethylolethane is reduced, the chemical reaction is also conducted in the micro reactor, more safety and reliability are achieved, triethylamine is used as catalyst, thus metal ion is not involved in the whole production process, desalting process is not needed in the post-treatment, steps are reduced, and operation is convenient.

Description

technical field [0001] The invention relates to the technical field of organic chemical industry, in particular to a process for continuously producing 2,2-dimethylolpropionic acid using a microreactor. Background technique [0002] Dimethylolpropionic acid is a multi-purpose organic raw material. This product is not only a chain extender in the manufacture of water-based polyurethane, but also enables polyurethane to obtain self-emulsifying properties, and can be made into self-emulsifying water-based polyurethane with excellent stability. It is used to prepare polyurethane water emulsion type leather finishing agent. It is an upgraded product of traditional water emulsion polyacrylate leather finishing. It is used to improve the additive of polyester resin and is used as raw material for making photosensitive resin and liquid crystal. It is used for epoxy resin Ester coatings, polyurethane elastomers and powder coatings are used in the manufacture of magnetic materials and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/285C07C59/10B01J19/00
CPCB01J19/0093C07C51/285C07C59/10
Inventor 邓德才向铁军谢小翠高晓春王建国
Owner 昆山复希工程技术有限公司
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