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Cyclohexyl isocyanate rectification column

A cyclohexyl isocyanate and rectifying tower technology, which is applied in the field of cyclohexyl isocyanate rectifying towers, can solve the problems of low rectification efficiency and low purity of finished products, and achieves high rectification efficiency, high rectification purity and improved distillation temperature. Effect

Inactive Publication Date: 2019-11-12
ANHUI GUANGXIN AGROCHEM
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing cyclohexyl isocyanate rectification towers have the disadvantages of low rectification efficiency and low purity of finished products

Method used

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  • Cyclohexyl isocyanate rectification column
  • Cyclohexyl isocyanate rectification column

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] see Figure 1~2 , the present invention provides a technical solution: a cyclohexyl isocyanate rectification column, comprising a primary column 1 and a secondary column 2, the interior of the primary column 1 is provided with a reflux plate 11 and a partition 10, the primary column 1 The part below the internal partition 10 is the evaporation chamber 3, the part above the internal reflux plate 11 of the primary column 1 is the condensation chamber 4, t...

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Abstract

The invention discloses a cyclohexyl isocyanate rectification column, which comprises a first-stage column and a second-stage column. The first-stage column is provided with a reflux plate and a partition plate inside, wherein the part, below the partition plate, in the first-stage column is an evaporation chamber; the part, above the reflux plate, in the first-stage column is a condensation chamber; the side wall of the evaporation chamber is connected to a feeding pipe; the bottom of the evaporation chamber is connected to a discharging pipe and is provided with an electric heating plate; the condensation chamber is provided with a condensation mechanism inside, and is connected to the evaporation chamber through a pipe; a thermal insulation mechanism is arranged outside the pipe; the bottom of the condensation chamber is connected to the second-stage column through a communicating pipe; the bottom of the second-stage column is connected to a secondary discharging pipe; the top of the second-stage column is connected to a gas discharging pipe; and a heating mechanism is arranged inside the second-stage column. The rectification column has a simple structure, a high rectificationefficiency and high rectification purity.

Description

technical field [0001] The invention relates to the technical field of cyclohexyl isocyanate production equipment, in particular to a cyclohexyl isocyanate rectification tower. Background technique [0002] Cyclohexyl isocyanate, colorless to pale yellow liquid with pungent odor. Can react with water. Industrially used in organic synthesis. Its vapor forms an explosive mixture with air, and reacts violently with acids, amines, alcohols, alkalis, and water, causing the danger of burning and explosion. Decomposed by high heat, emitting highly toxic fumes. Corrosive. Cyclohexyl isocyanate is used as an intermediate in the manufacture of various products, mainly used in the synthesis of pesticides or pharmaceutical intermediates, used in the production of herbicides such as hexazinone, etc. Ketone original drug. [0003] In the production process of cyclohexyl isocyanate, the prepared crude cyclohexyl isocyanate component contains a large amount of toluene, and the crude c...

Claims

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Application Information

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IPC IPC(8): B01D3/14C07C263/20C07C265/10
CPCB01D3/143B01D3/148C07C263/20C07C2601/14C07C265/10
Inventor 王争强吴和家徐小兵杨春凤刘长庆
Owner ANHUI GUANGXIN AGROCHEM
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