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A kind of high-purity secondary octanol industrial production method

A production method and high-purity technology, applied in chemical instruments and methods, organic chemistry, preparation of hydroxy compounds, etc., can solve problems such as high-purity secondary octanol, high catalyst requirements, harsh reaction conditions, etc., and achieve easy control , stable product quality, less side effects

Active Publication Date: 2021-08-17
安阳市景晟科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the chemical method is often complicated to operate and produces more three wastes during the preparation process, which seriously pollutes the environment; while the hydrogenation method generally uses a catalyst to reduce 2-octanone to 2-octanol, although it can produce 2-octanol with higher purity , but the reaction conditions are relatively harsh, the requirements for the catalyst are high, and the cost is expensive. At the same time, because the structure and chemical properties of the raw material 2-octanone and 2-octanol are similar, the reaction is difficult to complete, and it is increasingly unable to meet the requirements of high-purity 2-octanol. The needs of industrial production

Method used

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  • A kind of high-purity secondary octanol industrial production method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) After the raw material of crude secondary octanol is exchanged by heat exchanger, the entering temperature is 60°C and the acid value is less than or equal to 0.1mg / m 3 Alkali washing tower for alkali washing treatment, and then transported to the standby tank for use;

[0024] (2) Put the raw material processed by alkali washing in the above-mentioned spare tank into the light component rectification tower with a vacuum degree of 70KPa from the middle part feed port, the feed temperature is 110°C, and the light component in the raw material is passed through The light component reboiler connected to the bottom of the tower is vaporized after being heated, and the temperature at the bottom of the tower is 130°C. The vaporized light component returns to the tower through the gas phase inlet, and then flows out from the top of the tower. After the gas is completely condensed by the water cooler, it flows into the reflux tank. The light component liquid in the reflux t...

Embodiment 2

[0028] (1) After the raw material of crude secondary octanol is exchanged in a heat exchanger, the entering temperature is 70°C, and the acid value is ≤0.1mg / m 3 Alkali washing tower for alkali washing treatment, and then transported to the standby tank for use;

[0029] (2) Put the raw material processed by alkali washing in the above-mentioned spare tank into the light component rectification tower with a vacuum degree of 75KPa from the middle part feed port, the feed temperature is 115 ° C, and the light component in the raw material is passed The light component reboiler connected to the bottom of the tower is heated and then vaporized. The temperature at the bottom of the tower is 135°C. The vaporized light component is returned to the tower through the gas phase inlet, and the gas and liquid are exchanged in the stripping section and the rectifying section. Then it flows out from the top of the tower, the temperature at the top of the tower is 80°C, the light component g...

Embodiment 3

[0033] (1) After the crude secondary octanol raw material is exchanged by a heat exchanger, the temperature of entry is 80°C, and the acid value is ≤0.1mg / m 3 Alkali washing tower for alkali washing treatment, and then transported to the standby tank for use;

[0034] (2) Put the raw material processed by alkali washing in the above-mentioned spare tank into the light component rectification tower with a vacuum degree of 80KPa from the middle part feed port, the feed temperature is 120°C, and the light component in the raw material is passed through The light component reboiler connected to the bottom of the tower is heated and then vaporized. The temperature at the bottom of the tower is 140°C. The vaporized light component is returned to the tower through the gas phase inlet, and the gas and liquid are exchanged in the stripping section and the rectifying section. Then it flows out from the top of the tower, the temperature at the top of the tower is 85°C, the light componen...

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Abstract

The patent of the invention relates to the technical field of chemical raw material production, and discloses an industrial production method of high-purity 2-octanol. According to the difference in boiling point of each component in the raw material, the method adopts rectification technology to separate and prepare high-purity 2-octanol step by step. Distillation tower, after being heated by the reboiler to vaporize part of the liquid, the obtained gas is returned to the tower through the gas phase inlet, and the gas and liquid are exchanged in the stripping section and the rectifying section, and then flow out from the top of the tower, and pass through the water cooler. After condensing, it flows into the reflux tank, and the liquid in the reflux tank flows part of the liquid into the metering tank for extraction through the reflux pump, and the reflux liquid returns to the rectification tower in batches from the top of the tower and the two-stage rectification section through the reflux distributor. The method has the advantages of low cost, high efficiency and convenience, easy control and large-scale production, less side reactions in the preparation process, stable and adjustable product quality, and the purity of the obtained secondary octanol can reach more than 99.85%.

Description

technical field [0001] The patent of the invention relates to the technical field of chemical raw material production, in particular to an industrial production method of high-purity 2-octanol. Background technique [0002] As an important organic chemical raw material, 2-octanol can replace petroleum product octanol and industrial octanol, and has been widely used in various fields such as synthetic plasticizers, surfactants, agricultural emulsifiers, advanced lubricants, and spice preparation. It is mainly derived from crude secondary octanol, a by-product of the hydrolysis of castor oil to sebacic acid, but its purity is only about 80%, and it contains impurities such as water and double bond organic compounds, which not only cannot meet the purity required for actual production , and greatly limited the application space of 2-octanol. [0003] At present, the refining and purification methods of crude 2-octanol mainly include chemical method and hydrogenation method. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/125C07C29/80
CPCC07C29/80C07C31/125
Inventor 李冬来田明奎郭志强张巍崔卫民黄勇李运梅
Owner 安阳市景晟科技有限公司
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