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Mixer and method for preparing organic isocyanate

An organic isocyanate and mixer technology, applied in mixers, fluid mixers, chemical instruments and methods, etc., can solve problems such as phosgene leakage, and achieve the effects of reducing the risk of clogging, reducing retention and simple structure

Active Publication Date: 2010-05-19
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a risk of phosgene leakage due to the presence of moving parts in the reactor

Method used

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  • Mixer and method for preparing organic isocyanate
  • Mixer and method for preparing organic isocyanate
  • Mixer and method for preparing organic isocyanate

Examples

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] A mixer comprising a main feed pipe 1, two side feed pipes 3 and a discharge pipe 4; the main feed pipe and the discharge pipe are arranged on the same axis, and the axis of the side feed pipe is connected The axis of the feed pipe is set at 60 degrees (it can also be set at 70 degrees, 80 degrees or 90 degrees), and a mixing chamber 7 is arranged at the confluence of the main feed pipe, side feed pipe and discharge pipe. An ultrasonic generator 8 is arranged outside the chamber, and the ultrasonic wave with a frequency of 80KHz is transmitted to the mixing chamber (the frequency of the ultrasonic wave can also be selected from 20KHz, 60KHz, 100KHz, 150KHz, 180KHz or 200KHz); the main feed pipe is provided with a microchannel 6; The side feed pipe is provided with a constriction 2 near the mixing chamber; the discharge end of the discharge pipe is provided with ...

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Abstract

The invention discloses a mixer and a method for preparing organic isocyanate. The mixer comprises a main feed pipe, two side feed pipes and a discharge pipe, wherein the main feed pipe and the discharge pipe are arranged on the same axis, and the arrangement of the side feed pipes causes the axes of the side feed pipes and the axis of the main feed pipe are in 60-90 degrees; the point of intersection of the main feed pipe, the side feed pipes and the discharge pipe is provided with a mixed chamber, and an ultrasonic generator is arranged outside the mixed chamber; a microchannel is arranged in the main feed pipe; each side feed pipe is provided with a reduced section near the mixed chamber; and the discharge end of the discharge pipe is provided with an expansion pipe. The mixer of the invention has simple structure and favourable micromixing effect. When used for preparing organic isocyanate, the mixer of the invention can realize favourable micromixing of organic primary amine and phosgene, lowers the usage amount of inert organic solvent as well as the excessive degree of phosgene, reduces solid detention and lowers the danger of solid blockage.

Description

technical field [0001] The invention relates to a mixer and a method for preparing organic isocyanates using the mixer. Background technique [0002] The purpose of fluid mixing is to achieve uniform distribution of different components in the mixture, which is usually required to be completed in a short time. For fluid mixing processes, molecular diffusion is the final step in the mixing process. Based on Fick's law, mixing is related to the diffusion coefficient and the diffusion distance. Diffusion without assistance is usually a relatively slow process. Dividing the mixing volume into fractions or using thin layers to reduce the diffusion distance are viable ways to achieve rapid mixing, especially in laminar flow regimes. In the turbulent flow region, the fluid body is induced to divide into many thin layers and form a vortex, and the fluid is dispersed into many small fragments to promote mutual mixing. [0003] In addition to the common means of fluid mixing such ...

Claims

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Application Information

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IPC IPC(8): B01F5/04C07C263/10C07C265/14
Inventor 徐双庆闫少伟李韡潘国平韩优杨在建张金利郭可宇
Owner TIANJIN UNIV
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