Method for preparing ethanol with ultralow metal ion concentration

A technology of metal ion concentration and ion concentration, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., to achieve the effect of less ethanol impurity content and improved thermodynamic efficiency

Inactive Publication Date: 2018-06-19
GUANGXI COFCO BIO ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no technical disclosure of the method for preparing ultra-low particle concentration ethanol

Method used

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  • Method for preparing ethanol with ultralow metal ion concentration

Examples

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Embodiment 1

[0020] A method for preparing ethanol with ultra-low metal ion concentration, according to the following steps:

[0021] 1. Take anhydrous ethanol produced from cassava flour, add potassium sulfate, sodium sulfate, and copper sulfate aqueous solution to prepare an ethanol solution with a potassium, sodium, and copper ion concentration of 20 ppm. It can be considered that the solution contains potassium, sodium, and copper. The ion concentration is at least 20 ppm.

[0022] 2. Use PinAAcle 900T atomic absorption analyzer to test and analyze the exact concentration of potassium, sodium and copper ions in the above solution: potassium ion concentration is 20.70ppm, sodium ion concentration is 21.81ppm, copper ion concentration is 20.42ppm, and the data is recorded.

[0023] 3. Install the preparation device: connect one end of the condenser 9 to the T-end of the tee 5, and the other end to the receiving flask 11 through the horn tube 10; one end of the straight tube of the tee 5 is conn...

Embodiment 2

[0028] A method for preparing ethanol with ultra-low metal ion concentration, according to the following steps:

[0029] 1) Take the absolute ethanol produced from cassava flour, add potassium sulfate, sodium sulfate, and copper sulfate aqueous solution to prepare an ethanol solution with a potassium, sodium, and copper ion concentration of 10 ppm. It can be considered that the solution contains potassium, sodium, and copper. The ion concentration is at least 10 ppm.

[0030] 2) Test and analyze the exact concentration of potassium, sodium and copper ions in the above solution with PinAAcle 900T atomic absorption analyzer: potassium ion concentration is 10.34ppm, sodium ion concentration is 11.38ppm, copper ion concentration is 10.74ppm, and the data is recorded.

[0031] 3. Same as Example 1.

[0032] 4. Put the solution described in step 1 in round-bottom flask 6 for distillation, and the distillate is then subjected to sub-boiling distillation in Erlenmeyer flask 3. The distillatio...

Embodiment 3

[0036] A method for preparing ethanol with ultra-low metal ion concentration, according to the following steps:

[0037] 1. Take the distillate sample of Example 1 as the original sample of this example.

[0038] 2. Use PinAAcle 900T atomic absorption analyzer to test and analyze the exact concentration of potassium, sodium and copper ions in the above solution: potassium ion concentration is 0.24ppm, sodium ion concentration is 0.17ppm, copper ion concentration is 0.32ppm, and the data is recorded.

[0039] 3. Same as Example 1.

[0040] 4. Put the solution described in step 1 in round-bottom flask 6 for distillation, and the distillate is then subjected to sub-boiling distillation in Erlenmeyer flask 3. The distillation temperature of round-bottom flask 6 and Erlenmeyer flask 3 is controlled at 76.8±0.2°C. The distilled steam is condensed by the condenser 9 and the condensate is dripped into the receiving bottle 11, and the obtained condensate is ethanol with ultra-low metal ion con...

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Abstract

The invention discloses a method for preparing ethanol with ultralow metal ion concentration. Absolute ethanol produced from tapioca flour through fermentation is taken as a raw material and processedwith a heating reflux method, an ethanol liquid is distilled off in a sub-boiling state, and metal ions in ethanol is removed. The metal ion concentration of purified ethanol is ultralow and is tested and verified by a Perkin Elmer-PinAAcle 900T type atomic absorbing instrument. The method has the beneficial effects as follows: the method and equipment for improving purity of ethanol by a simpledevice are invented, chemical development is promoted, and particularly, the method has great significance for promoting production and popularization of electronic grade ethanol.

Description

Technical field [0001] The invention belongs to the field of electronic chemical production, and specifically is a method for preparing ethanol with ultra-low metal ion concentration. Background technique [0002] With the continuous development of electronic technology, raw materials and products such as precision electronic devices and electronic grade chemicals are getting more and more attention. Electronic grade ethanol products have unique and excellent properties and have been widely used in various fields such as military industry, chemical industry, electronics, energy, machinery, environmental protection, and medicine. However, electronic grade ethanol is restricted by production technology and cannot be widely produced. Common purification techniques include distillation, rectification, sub-boiling distillation, vacuum distillation, gas absorption and other techniques. These purification techniques have their own characteristics and strengths. However, there is no te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/80C07C31/08
CPCC07C29/80C07C31/08
Inventor 罗虎孙振江杜金宝黄加军刘楠许旺发李永恒梁坤国赖铭雪宋金凤李莉霍伟男
Owner GUANGXI COFCO BIO ENERGY
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