Formaldehyde prepration process and device

A technology for the preparation and preparation of formaldehyde, which is applied in the direction of organic chemistry, can solve the problems of reducing the yield, and achieve the effects of reducing the difficulty of operation, less methanol, and a shorter process flow

Inactive Publication Date: 2010-06-30
江苏恒茂机械制造有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

It is impossible for the above method to increase the conversion rate while reducing the negative reaction without reducing the yield

Method used

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  • Formaldehyde prepration process and device
  • Formaldehyde prepration process and device

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Embodiment Construction

[0017] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0018] Formaldehyde preparation process is as follows

[0019] (1) Methanol is mixed with air and heated, and saturated water vapor is added after the heated mixture is demistered to form a ternary mixed gas, which is then subjected to fire-stop filtration;

[0020] (2) After the ternary mixed gas is passed into the catalyst, oxidation and deoxidation of methanol are carried out at a high temperature of 590°C to 610°C to generate formaldehyde gas;

[0021] (3) The formed formaldehyde gas and other gases are quenched to prevent thermal decomposition;

[0022] (4) Formaldehyde gas is absorbed through process water, extracted for aldehyde and alcohol separation...

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Abstract

The invention relates to the production field of formaldehyde, in particular to a formaldehyde prepration process which simplifies the process flow and a device, and the process flow is as follows: heating methanol and air, then removing fog droplets, adding saturated water vapor, and then arresting fire and filtering; then introducing a catalyst for carrying out oxidation and deoxidation; quenching generated gas; absorbing the formaldehyde gas through process water, extracting, carrying out aldehyde-alcohol separation, collecting and storing the aldehyde after separation as a formaldehyde finished product, and continuously treating other gas. The device comprises a processor, a reactor and a combined absorption tower, and methanol mixed gas sequentially passes through the components, wherein a circulating pump is connected on the combined absorption tower, a distillation absorption tower comprises a tower bottom section for absorbing the gas and re-distributing, a distillation conversion section for carrying out methanol separation gas-liquid conversion, an absorption section for liquid level control, a floating valve section for absorbing the methanol gas and a tower top section for gas-liquid separation. The preparation process and the device have the advantages of low conversion, long drive cycle, small system resistance, low power consumption and energy consumption and low material consumption.

Description

technical field [0001] The invention relates to the field of formaldehyde production, in particular to a formaldehyde preparation process and a device for simplifying the process flow. Background technique [0002] At present, after more than 50 years of ups and downs in the production of silver-based formaldehyde in China, great achievements have been made in all aspects. The energy consumption has changed from the gas consumption type to the external gas supply type, and the material consumption has changed from 500kg methanol / T 37% formaldehyde to the current 445kg methanol / T T 37% formaldehyde, the production capacity has grown from hundreds of thousands of tons to more than 20 million tons today, and the production capacity and technology of silver method have been in the leading position in the world. Formaldehyde production has developed from extensive to refined production, from simple to professional development, and the research on technology and operation is to im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C47/052
Inventor 叶子茂李宏元
Owner 江苏恒茂机械制造有限公司
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