Device for separating 2-methyl butanol, 3-methyl butanol from iso amyl alcohol and its application method

A technology of methyl butanol and isoamyl alcohol, which is applied in chemical instruments and methods, fractionation, preparation of hydroxyl compounds, etc., can solve the problems of not mentioning the rectification device and implementation process, difficulty in realizing industrial scale-up, and high operational stability requirements problems, to achieve the effect of strong operational stability, less equipment, and avoid pollution

Inactive Publication Date: 2008-02-20
上海天之冠可再生能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the use of rectification to separate 2-methylbutanol and 3-methylbutanol has the following reports: Invention patents 97104420.1 and 200310106387.0 disclose the preparation method of natural 2-methylbutanol / butyric acid respectively. Distillation separates 2-methylbutanol from fusel oil, but does not mention the specific rectification device and implementation process; invention patent 02133671.7 discloses the ability to simultaneously separate and purify racemic optical amyl alcohol, optically active amyl alcohol, and isoamyl alcohol The method and device for alcohol use stainless steel θ mesh ring packing or triangular wire packing, which has a serious amplification effect and is difficult to realize industrial scale-up; utility model patent 97235168.X discloses a rectification device for processing difficult-to-separate systems. Separation of 2-methyl butanol and 3-methyl butanol by multiple towers in series requires high operational stability and large investment in equipment
[0006] Azeotropic distillation and extractive distillation can increase the relative volatility of 2-methylbutanol and 3-methylbutanol, but the product quality is affected by the entrainer and extractant, the rectification process is complex, the process is lengthened, and the operation Cost increases and industrialization is more difficult; precision distillation mostly adopts distillation columns with a diameter of less than 50mm, which has obvious amplification effect, high production cost, unstable product quality and low yield

Method used

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  • Device for separating 2-methyl butanol, 3-methyl butanol from iso amyl alcohol and its application method
  • Device for separating 2-methyl butanol, 3-methyl butanol from iso amyl alcohol and its application method

Examples

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Effect test

Embodiment 1

[0023]Fusel oil batch rectification tower has a diameter of 200mm and a packing height of 6.0m. Fusel oil is added to 2000L to conduct sufficient mass transfer and exchange in the packed tower. After being condensed by the cooler, it is refluxed. The moisture in the raw material is separated from the isobutyl Alcohol is carried out azeotropically, and after the materials in the tower kettle are tested and qualified, the gasification amount is increased, and isoamyl alcohol is quickly evaporated from the outlet of the simple distillation of the tower kettle, so as to avoid the light components in the packing from polluting the tower kettle products, and a total of qualified The isoamyl alcohol product is 1000L, and the yield is more than 95%, including 20% ​​of 2-methyl butanol and 80% of 3-methyl butanol.

[0024] The diameter of the isoamyl alcohol continuous rectification tower is 200mm, and the packing height is 25m, of which the rectification section is 15m, and the strippi...

Embodiment 2

[0026] Fusel oil batch rectification column has a diameter of 200 mm and a packing height of 6.0 m. Add 2,000 L of fusel oil, conduct sufficient mass transfer and exchange in the packed column, and collect fractions between 127.5° and 128.5°C at a reflux ratio of 50:1 to obtain intermediate Fraction 200L, in which the content of 2-methyl butanol is 50%, and the content of 3-methyl butanol is 50%.

[0027] The diameter of the isoamyl alcohol continuous rectification tower is 200mm, and the packing height is 25m, of which the rectification section is 13m, and the stripping section is 12m. Into the packed tower, 2-methylbutanol with a purity of more than 99.5% is extracted from the side draw outlet below the top of the tower, and 3-methylbutanol with a purity of more than 99.5% is discharged from the automatic draining device of the tower kettle; the feed amount is 8 ~10L / h, 4~5L / h output from the top of the tower, 4~5L / h output from the bottom of the tower, and the optical rotat...

Embodiment 3

[0029] Fusel oil batch rectification column has a diameter of 200 mm and a packing height of 6.0 m. Add 2,000 L of fusel oil, conduct sufficient mass transfer and exchange in the packed column, and collect fractions between 128.5°C and 131.0°C at a reflux ratio of 1:1 to obtain intermediate Fraction 600L, 2-methyl butanol content 10%, 3-methyl butanol content 90%.

[0030] The diameter of the isoamyl alcohol continuous rectification tower is 200mm, and the packing height is 25m, of which the rectification section is 11m, and the stripping section is 14m. Into the packed tower, 2-methylbutanol with a purity of more than 99.5% is extracted from the side draw outlet below the top of the tower, and 3-methylbutanol with a purity of more than 99.5% is discharged from the automatic draining device of the tower kettle; the feed rate is 20 ~30L / h, 2~3L / h for tower top discharge, 18~27L / h for tower kettle discharge.

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Abstract

The present invention discloses apparatus for separating 2-methyl butanol and 3-methyl butanol from isoamyl alcohol product and its application method. The apparatus includes one continuous rectifying tower, which has re-boiler, automatic draining device, top discharge port with cooler, lateral line outlet, and parallel spiral stuffing of height over 10 m. The apparatus has simple structure, convenient operation, low cost, high yield and capacity of further amplification, and may be used in producing 2-methyl butanol and 3-methyl butanol or their mixture of purity over 99.5 % for use as edible perfume and essence.

Description

technical field [0001] The present invention relates to an industrialized separation method and production device of a system with close boiling point and low relative volatility, in particular to a device and application method for separating 2-methyl butanol and 3-methyl butanol from isoamyl alcohol . Background technique [0002] 3-Methylbutanol and 2-methylbutanol are the main components in fusel oil, a by-product of fermentation to produce alcohol. 3-Methylbutanol is a widely used solvent and an important raw material for the synthesis of fragrances, as well as the raw material and intermediates of some drugs; 2-Methylbutanol is a synthetic chiral compound, especially chiral liquid crystal materials It is an important intermediate and can also be widely used in spices, medicine, health care products, pesticides, plasticizers and other fields. [0003] With the continuous promotion and use of fuel ethanol, the production of alcohol produced by fermentation will increas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/125C07C29/80B01D3/14
Inventor 刘钺牛德龙杜风光陈伟红史吉平邢林
Owner 上海天之冠可再生能源有限公司
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