Method for producing low alcohol, high concentration formaldehyde

A high-concentration formaldehyde and production method technology, applied in the field of industrial formaldehyde solution production, can solve the problems of low methanol content, high product acid value, high power consumption, and achieve the effects of low methanol unit consumption, low investment and low cost

Inactive Publication Date: 2004-02-11
洪海玲
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Benefits of technology

This technology makes it easier than traditional methods that use large amounts of water or chemicals during production processes. It also saves money compared to current ways like burning fossil fuels while producing pure formalin product instead of complex mixtures containing multiple ingredients such as urea.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving both the efficiency and effectiveness of producing formaldehzene from an ethylene oxide process or another chemical reaction without increasing costs associated with either one's own technology or reducing emissions during manufacturing processes.

Method used

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  • Method for producing low alcohol, high concentration formaldehyde
  • Method for producing low alcohol, high concentration formaldehyde

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Embodiment Construction

[0007] The implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0008] As shown in the figure, the technological process that the present invention implements is by evaporator 1, overheating, flame arresting, filter 6, oxidizer 8, dealcoholization tower 10, the first absorption tower 13, the second absorption tower 17 and pipeline 4,7 . Absorbs water. The implementation process of the present invention is as follows: in the evaporator 1, the hot methanol 2 is bubbled and evaporated by the air 3 and enters the pipeline 4, where the batching steam 5 is added, and the mixed gas enters the oxidizer through superheating, flame arresting, filter 6, and pipeline 7 8. Here, methanol undergoes dehydrogenation and oxidation reaction to generate formaldehyde, hydrogen, water and a small amount of by-products, which together with unreacted water vapor, nitrogen, and a small amount of methanol in the raw materials form a generate...

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Abstract

The present invention relates to one improved silver process of producing formaldehyde. Produced gas with relatively high temperature and with heat from waste heat boiler is used as heat source for eliminating alcohol and water from formaldehyde mixture in the first absorption tower, and partial alcohol containing dilute formaldehyde solution is returned from some place in the second absorption tower in the absorption system with gradually lowered temperature to realize the dealcoholization-reutilization circulation. The process is simple, low in methanol consumption, low in investment and reasonable energy utilization, and the produced formaldehyde product has low alcohol content and high concentration.

Description

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Claims

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Application Information

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Owner 洪海玲
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