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[Chemical Knowledge]：The production and manufacturing method and process of 95% ethanol.

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The manufacturing method
of 95% ethanol
1. Introduction

ethanol, also known as alcohol, is an organic compound widely used in chemical, pharmaceutical, food and other industries. Among them, 95% ethanol has special applications in many fields due to its specific concentration and properties. This article will detail the manufacturing method of 95% ethanol.

2. raw materials and equipment

1. raw materials: the main raw materials are starch or molasses, auxiliary raw materials are yeast, phosphoric acid and lime.
2. Equipment: fermentation tank, distillation tower, condenser, storage tank, etc.

3. manufacturing steps

1. starch saccharification: starch raw materials are added into warm water, pH value is adjusted, and saccharification enzyme is added to produce glucose.
2. Fermentation: The glucose solution is cooled to a suitable temperature and then fermented by yeast to produce ethanol and carbon dioxide.
3. Distillation: The fermentation liquid is heated to boiling, and the ethanol vapor is condensed by a condenser and collected to obtain crude ethanol.
4. Rectification: Crude ethanol enters the distillation column and is purified to 95% ethanol by rectification.

4. matters needing attention

1. good control of fermentation temperature, avoid the temperature is too high or too low affect yeast activity.
2. Keep the pH value in the fermentation tank stable to ensure yeast growth and fermentation process.
3. In the distillation process, the temperature and pressure in the tower should be strictly controlled to ensure product quality.

5. quality standard
the quality standard of
95% ethanol shall meet the following regulations: ethanol content ≥ 95%, moisture ≤ 5%, acidity ≤ 0.005, and other impurities shall meet relevant regulations.

6. safety and environmental protection

1. In the production process, strictly abide by the safety operation procedures to prevent the occurrence of fire, explosion and other accidents.
2. Waste should be properly disposed of to avoid environmental pollution.

7. Conclusion The manufacture of 95% ethanol in

involves many links and precautions, and it is necessary to strictly control the quality of raw materials, equipment, operation and other aspects. Through scientific manufacturing methods and strict quality control, high-quality 95% ethanol can be produced to meet the needs of chemical industry, medicine and other fields. At the same time, it is also necessary to pay attention to safety and environmental protection in the production process to ensure the sustainability and social benefits of production activities.

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