Fractional distillation equipment for separating propargyl alcohol and method of equipment

Abstract

The invention discloses fractional distillation equipment for separating propargyl alcohol and a method of the equipment, which are applied to the field of chemical separation. The fractional distillation equipment comprises a clamping wall tower, a rectifying tower stripping section, a rectifying tower rectifying section, a rectifying tower condenser, a vacuum evaporator, a rectifying tower tail cooler, a return tank, heaters and a vacuum evaporator cooler, wherein the clamping wall tower comprises stripping sections; an alkali liquor feeding hole is formed on the top of the clamping wall tower; the rectifying tower consists of the rectifying tower stripping section and the rectifying tower rectifying section; a mixture feeding hole and a demister are arranged between the rectifying tower stripping section and the rectifying tower rectifying section; the clamping wall tower is coupled to the rectifying tower; the clamping wall tower and the rectifying tower are connected with the heaters respectively; the rectifying tower is connected with the rectifying tower condenser; the rectifying tower condenser is connected with the rectifying tower tail cooler and the return tank; and the return tank is connected with the top of the rectifying tower through a first pipeline and is connected with a propargyl alcohol recovery pipeline. The concentration process is omitted, the concentration and propargyl alcohol concentration extraction are integrated, the process of separating the propargyl alcohol from butynediol is simplified, the production efficiency is improved, the multi-effect energy-saving technologies such as thermal coupling and thermal networking are adopted, and the product quality is improved.

Description

[0001] The present invention relates to a fractionation equipment and method for separating propynyl alcohol in the field of chemical separation. Background technique [0002] Propargyl alcohol is an important chemical raw material, mainly used in various industries such as pharmaceutical chemical industry, electroplating pesticide and oil drilling. At present, the industrialized production of propynyl alcohol basically adopts the Reppe method production process, which was first successfully developed by the German scholar Reppe and the country's IG company in 1937, using formaldehyde aqueous solution and acetylene as raw materials, and acetylene copper as a catalyst for joint production Proynyl alcohol and butynediol increase the partial pressure of acetylene in the reaction, and the production ratio of propynyl alcohol increases accordingly. Therefore, when the target product is propynyl alcohol, the acetylene pressure of 1.0-2.0MPa is generally used, and the propynyl alcohol...

AI Technical Summary

Problems solved by technology

In the above process, butynediol needs to be over-concentrated at high temperature to remove low-boiling impurities such as propynyl alcohol and formaldehyde. At the same time, 90% of the water is distilled and cooled repeatedly, which consumes a lot of energy.

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