Rectifying and refining process of synthetic coarse methanol

A technology of crude methanol and rectification, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, and preparation of organic compounds. The effect of feed concentration, reduced dosage, and reduced reflux ratio
CN1931807AInactive Publication Date: 2007-03-21ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2007-03-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The rectifying and refining process of synthetic coarse methanol includes the following steps: initial rectification of coarse methanol in a pre-rectifying tower with sodium hydroxide and extracting water fed from the tower top, and discharging the initially rectified methanol through the tower bottom while exhausting light impurity through the tower top; rectification in the pressurized tower and recovering rectified methanol from the tower top while exhausting waste water and discharging residual coarse methanol; rectification in the normal pressure tower and recovering rectified methanol while exhausting hetero alcohol oil from the side of the tower and returning industrial soft water from the tower bottom to the pre-rectifying tower. The present invention has low steam consumption and circular utilization of industrial soft water.
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Description

technical field

[0001] The invention relates to a method for rectifying and refining synthetic crude methanol, which belongs to resource and energy-saving chemical production technology. Background technique

[0002] Methanol is an important organic chemical raw material and new energy fuel, and has a wide range of uses in the fields of chemical industry, light industry and clean energy. In the industrial production process of synthetic methanol, the refining of crude methanol is not only an important process that determines the quality of methanol products, but also the energy consumption of the refining process is one of the key factors affecting the production cost of methanol. Therefore, under the condition of ensuring the quality of methanol products, it is of great significance to save energy and reduce consumption in the methanol refining process. At present, the energy-saving refining process that has been widely used in the synthetic methanol industry is the three-...

Claims

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