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Method for continuously synthesizing methyl isopropyl ketone

A methyl isopropyl ketone, chemical synthesis technology, applied in the direction of chemical instruments and methods, preparation of organic compounds, carbon-based compounds, etc., can solve the problems of high operating costs, low production efficiency, unfavorable industrial production, etc., to achieve Reduce operating costs, realize automatic control, and reduce the effect of manual operations

Active Publication Date: 2021-01-01
山东智永化工产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing butanone-formaldehyde synthesis method of methyl isopropyl ketone generally adopts a batch method. The batch method has many procedures, requires a lot of manual operations, and the reaction, separation, and transfer of materials are cumbersome. There are many dynamic and static sealing points, and the smell is environmentally friendly. Uncontrollable, many wastes, low yield; low production efficiency and high operating costs; raw material input ratio, raw material input amount and reaction time cannot be automatically controlled, which is not conducive to industrial production

Method used

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  • Method for continuously synthesizing methyl isopropyl ketone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]Replace the four-stage 1L series hydrogenation reactor with nitrogen for three times and hydrogen for three times, and maintain the hydrogen pressure of the reactors at 0.2Mpa. Turn on methyl ethyl ketone, catalyst feed pump and formaldehyde feed pump to start feeding the first-stage kettle; the flow rate of methyl ethyl ketone is 6.3g / min, the flow rate of formaldehyde solution (37%) is 6.42g / min, catalyst slurry The flow rate is 0.31g / min.

[0023]Turn on the self-priming and stirring of the first-stage kettle (rotating speed 650 rpm), and control the temperature of the first-stage to 35-40℃; when the material in the first-stage kettle reaches the overflow level, it will flow into the second-stage kettle and turn on the second-stage kettle Self-priming stirring (rotating speed 650 rpm), controlling temperature 60-65℃; when the liquid level of the second tank reaches the overflow level, the material starts to enter the third-stage kettle, and turning on the third-stage tank stir...

Embodiment 2

[0025]Replace the five-stage 1L series hydrogenation reactor with nitrogen for three times and hydrogen for three times, and maintain the hydrogen pressure of the reactors at 3.0Mpa. Turn on the methyl ethyl ketone, catalyst feed pump and formaldehyde feed pump to start feeding the first-stage kettle. The flow rate of methyl ethyl ketone is 6.3g / min; the flow rate of formaldehyde solution (37%) is 5g / min; the flow rate of catalyst slurry is 0.31g / min.

[0026]Turn on the self-priming stirring of the first-stage kettle (rotational speed 360 rpm), control the first-stage temperature to 35-40℃; when the first-stage kettle material reaches the overflow level, start to flow into the second-stage kettle, and turn on the second-stage kettle Self-priming stirring (rotating speed 650 rpm), temperature control 65-70℃; when the liquid level of the second tank reaches the overflow level, the material starts to enter the third-stage tank, and the third-stage tank stirring is started (rotating speed...

Embodiment 3

[0028]Replace the three-stage 1L series hydrogenation reactor with nitrogen for three times and hydrogen for three times, and keep the hydrogen pressure of the reactors at 4.0Mpa. Turn on the methyl ethyl ketone, catalyst feed pump and formaldehyde feed pump to start feeding the first-stage kettle.

[0029]The first-stage kettle is fed, the flow rate of methyl ethyl ketone is 6.3g / min; the flow rate of formaldehyde solution (37%) is 2g / min; the flow rate of catalyst slurry is 0.25g / min; the first-stage kettle self-priming stirring (speed 860 rpm), control the first-stage temperature to 40-45°C, when the material reaches the overflow level of the first-stage kettle, start to enter the second-stage kettle, and turn on the second-stage kettle to stir (speed 650 rpm) , Keep the temperature of the second-stage kettle at 55-60℃, when the material liquid reaches the overflow level of the first-stage kettle, start to enter the third-stage kettle, turn on the third-stage kettle to stir (speed 6...

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Abstract

The invention provides a method for continuously synthesizing methyl isopropyl ketone. The methyl isopropyl ketone is continuously synthesized in n stages of reaction kettles which are sequentially connected in series. According to the method disclosed by the invention, the purity of the prepared methyl isopropyl ketone reaches 99% or above, and the yield is 73-78%. According to the method, continuous industrial production of methyl isopropyl ketone can be achieved, manual participation operation is reduced, the operation cost is reduced, the raw material input proportion, the raw material input amount and the reaction time can be accurately controlled, automatic control can be achieved, and the industrial production process is safer, more environmentally friendly and more reliable.

Description

Technical field[0001]The invention relates to a method for continuously synthesizing methyl isopropyl ketone, and belongs to the technical field of chemical synthesis.Background technique[0002]The existing methyl ethyl ketone formaldehyde method to synthesize methyl isopropyl ketone generally adopts a batch method. The batch method has many procedures, requires a large amount of manual operation, complicated reaction, separation, and transfer of materials, and has many static and dynamic sealing points, and the smell is environmentally friendly. Uncontrollable, three wastes, low yield; low production efficiency and high operating cost; raw material input ratio, raw material input amount and reaction time cannot be automatically controlled, which is not conducive to industrial production.Summary of the invention[0003]Aiming at the deficiencies in the prior art, the present invention provides a method for continuously synthesizing methyl isopropyl ketone, which can realize automatic c...

Claims

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Application Information

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IPC IPC(8): C07C49/04C07C45/61
CPCC07C45/61C07C49/04
Inventor 侯永生吴国军朱素娟马华青邹敏侯龙张建波张立滨柳伟杰
Owner 山东智永化工产业技术研究院有限公司
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