Method for preparing two-phase catalytic micro-reactor

A microreactor, oil phase technology, applied in chemical instruments and methods, microsphere preparation, microcapsule preparations, etc., can solve problems such as application limitations, catalyst recycling difficulties, etc., to achieve simple operation, easy recovery and reuse, High stability effect

Inactive Publication Date: 2013-07-10
XIAN UNVERSITY OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the application of reverse micellar microreactors in two-phase catalytic reactions has achieved very positive research results, however, the reverse micelles in the form of microemulsions are difficult for the separation of catalytic reaction products and the separation of catalysts. There are certain difficulties in recycling, so its application is limited

Method used

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  • Method for preparing two-phase catalytic micro-reactor
  • Method for preparing two-phase catalytic micro-reactor
  • Method for preparing two-phase catalytic micro-reactor

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Preparation of synthetic template oil phase

[0037] Surfactant Span-80 was added into a beaker filled with cyclohexane, and the surfactant Span-80 and cyclohexane were mixed at a weight ratio of 1:90 to prepare an oil phase.

[0038] (2) Preparation of emulsion

[0039] Put the synthetic template oil phase prepared in step (1) into a three-necked flask, stir with a stirrer at a stirring speed of 800 rpm, and inject N at a flow rate of 2 to 3 mL / min. 2 , emulsified at 36°C for 40 minutes to make an emulsion;

[0040] (3) Preparation of water phase

[0041] Methacrylic acid MAA is a monomer, and the dosage is 22% of the weight of cyclohexane, neutralized with an aqueous solution of sodium hydroxide with a mass concentration of 30%, and the degree of neutralization is 60%, to make an aqueous solution A; agent, the dosage is 9.1% of the monomer weight; N, N'-methylenebisacrylamide is the crosslinking agent, the dosage is 13% of the monomer weight, and the ratio of a...

Embodiment 2

[0049] Same as the preparation method in Example 1, other conditions are as described in Example 1, in the preparation of synthetic template oil phase process step (1), surfactant Span-80 and cyclohexane are mixed with 1: 85 by weight Formulated as an oil phase. In the process step (2) of preparing the emulsion, under the condition of 20° C., the stirring speed is 400 rpm, and the emulsion is emulsified for 40 minutes to prepare the emulsion. In the preparation of the aqueous phase process step (3), the amount of N,N'-methylenebisacrylamide is 5% of the monomer weight. In the process step (4) of preparing the microgel, the stirring speed is 400 rpm. In the process step (5) of preparing PMAA / AEM composite microspheres, the microgel synthesized in step (4) is used as a template, and the microgel is mixed with 3v% AEM ethanol solution at a weight ratio of 1:3.0. In the process step (6) of preparing the PMAA / AEM / W2 microreactor, the PMAA / AEM composite microspheres were mixed wit...

Embodiment 3

[0051] The same as the preparation method in Example 1, other conditions are as described in Example 1, in the preparation of synthetic template oil phase process step (1), surfactant Span-80 and cyclohexane are mixed with 1:94 by weight Formulated as an oil phase. In the process step (2) of preparing the emulsion, under the condition of 40° C., the stirring speed is 1000 rpm, and the emulsification is carried out for 40 minutes to prepare the emulsion. In the preparation of the aqueous phase process step (3), the amount of N,N'-methylenebisacrylamide is 20% of the monomer weight. In the process step (4) of preparing the microgel, the stirring speed is 1000 rpm. In the process step (5) of preparing PMAA / AEM composite microspheres, the microgel synthesized in step (4) is used as a template, and the microgel is mixed with the ethanol solution of 3v% AEM in a weight ratio of 1: 3.4 . In the process step (6) of preparing the PMAA / AEM / W2 microreactor, the PMAA / AEM composite micr...

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Abstract

The invention relates to a method for preparing a two-phase catalytic micro-reactor. The method comprises the following steps of: preparing a template oil phase; preparing an emulsion; preparing a water phase; preparing micro-gel; preparing PM / AEM composite microspheres; and preparing a PM / AEM / C micro-reactor. Compared with the conventional method for preparing the two-phase catalytic micro-reactor, the method of the invention is simple and convenient to operate. The obtained micro-reactor has a remarkable core-shell structure, rational design and high stability, and is easy to separate and recover. As an independent and complete catalytic reaction space unit, the micro-reactor can be recycled and is widely applied in the field of two-phase catalytic reaction.

Description

technical field [0001] The invention belongs to the technical field of microreactor preparation, and in particular relates to a preparation method of a two-phase catalytic microreactor. Background technique [0002] The microreactor is a new type of chemical reaction structural element developed in the early 1990s. It contains microchannels of various shapes inside. When the reactants pass through the microchannels, corresponding chemical or physical reactions occur. Compared with conventional reactors, due to The small and precise structural features of the microreactor make it have high heat transfer, mass transfer and reaction efficiency. It is the high efficiency of microreactors in terms of material and energy transfer that makes the chemical reactions implemented in microreactors show greater advantages than conventional reactors, not only has a very positive role in avoiding the amplification effect, And more importantly, it may have a positive effect on the effectiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/00B01J13/02
Inventor 杨菊香姚东东杨晓慧
Owner XIAN UNVERSITY OF ARTS & SCI
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