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Fusel oil molecular sieve gas phase dewatering method and separating and purifying method

A purification method and fusel oil technology are applied in the field of fusel oil molecular sieve gas phase dehydration method and separation and purification, which can solve the problems of corroding separation equipment, affecting the purity and yield of rectified products, and achieving the effect of increasing product yield.

Inactive Publication Date: 2003-11-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The fusel oil after salting out and dehydration contains a certain amount of water and salt, which corrodes subsequent separation equipment and affects the purity and yield of distillation products:

Method used

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  • Fusel oil molecular sieve gas phase dewatering method and separating and purifying method
  • Fusel oil molecular sieve gas phase dewatering method and separating and purifying method

Examples

Experimental program
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Embodiment 1

[0032] like figure 1 As shown, the production process of the new fusel oil separation and purification process is mainly composed of raw material preheater 1, adsorption condenser 2, desorption condenser 3, adsorber 4A, adsorber 4B, adsorber 4C, heater 5 and rectification purification device 6 and other operating unit equipment. 200 grams of 3A molecular sieves are installed in the adsorber, and the space velocity is 0.24h -1 .

[0033] The fusel oil raw material with a water content of 15% is heated to 250° C. through a raw material heater, so that the raw material is in a gaseous state. It is sent to the adsorber 4A through the valve 11. At this time, the valve 14 and the valve 13 are in the closed state. The water in the fusel oil raw material is adsorbed by the adsorbent installed in the adsorber 4A, and the anhydrous fusel oil enters the adsorption condenser through the valve 12 to condense 2 to obtain anhydrous fusel oil. The gauge pressure of the operating pressure...

Embodiment 3

[0039] Same as Example 2, the difference is that the water content of the raw material fusel oil is 1%, and the space velocity is 1.0h-1 , the adsorption operating pressure is gauge pressure 0.6Mpa, and the adsorption temperature is 300 degrees; after the adsorption treatment in an adsorption tower, the water content in the fusel oil is 0.1%.

Embodiment 4

[0041] Same as Example 1, the difference is that two adsorption towers are used to operate, the water content of the raw material fusel oil is 10%, and the space velocity is 0.6h -1 , the adsorption operating pressure is 0.2Mpa gauge pressure, the adsorption temperature is 220 degrees; After treatment, the water content in the fusel oil was 0.15%. The switching time between the adsorption and desorption operations of the two adsorption towers is 25 minutes.

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Abstract

The present invention proposes the technological scheme of separation and purifying fusel oil through combining molecular sieve vapor phase dewatering and rectification. Fuel oil fraction gas containing water is introduced to adsorbing apparatus for selective adsorption of fusel alcohol and water at operation gage pressure of 0-0.6 MPa and temperature 190-300 deg.c; and after water is adsorbed bythe adsorbent, various alcohols and esters are condensated to obtain qualified fuel alcohol product. The through dewatering of the fusel oil material can solve the difficult problem that water and various alcohols form azeotrope to lower the yield of separated fuel oil products. The thorough dewatered fuel oil in further rectified and separated intermittently or continuously to obtain fuel alcohol, isopropyl alcohol, isobutyl alcohol, isoamyl alcohol, ethyl caprate and other products.

Description

technical field [0001] The invention relates to a gas-phase dehydration method and a separation and purification method of fusel oil molecular sieves, in particular to a method for separation and purification of by-produced fusel oil fractions in the rectification process of fermented alcohol. Background technique [0002] Due to the shortage of global petroleum resources and the rapid development of biological enzyme technology, the technology of producing alcohol by new fermentation method is becoming more and more extensive. Fusel oil is one of the by-products of alcohol production by fermentation. It is formed during alcohol fermentation and is separated during alcohol distillation. The extraction rate accounts for about 0.4% to 0.7% of alcohol production. It is mainly composed of more than ten kinds of substances such as isoamyl alcohol, isobutanol, n-propanol, ethanol and water. The water content in fusel oil is about 10% to 17%, even a...

Claims

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Application Information

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IPC IPC(8): B01D15/08C07C29/76C12F3/00
Inventor 张敏华刘宝菊吕惠生董秀芹刘成刘宗章李光辉钱胜华姜浩锡张志强
Owner TIANJIN UNIV
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