A kind of processing method of high-grade alcohol anhydrous alcohol

Abstract

The invention relates to an alcohol production process, and in particular to a method for processing absolute alcohol of senior alcohol. The method comprises the following steps: (1) distilling, and (2) dehydrating. According to the method, five-tower distillation is performed on fermented glutinous rice of cassava and molasses, edible-grade alcohol of which the alcohol content is 95-96% (v / v) is prepared after distillation, the edible-grade alcohol is dehydrated in a molecular sieve adsorption dehydration mode, an improved five-tower distillation process is adopted to improve the protection function on molecular sieve equipment, and the purposes of energy consumption reduction, product quality improvement and, molecular sieve dehydration equipment protection can be achieved.

Description

【Technical field】 [0001] The invention relates to an alcohol production process, in particular to a processing method of superior alcohol anhydrous alcohol. 【Background technique】 [0002] Adding a modifier to anhydrous ethanol can form denatured fuel ethanol, and blend it with gasoline in a certain proportion to form ethanol gasoline for vehicles, which is used as fuel for ignition internal combustion engines. Therefore, it plays an important role in the petrochemical field and is a clean With the new trend of energy development, the main methods for preparing absolute ethanol are extraction and adsorption. The extraction method introduces a third component into the original alcohol-water component, such as benzene, ethylene glycol, cyclohexane, etc. The disadvantage of the extraction method is that the energy consumption is high, the product will contain the extractant, it cannot be used in food, medicine, cosmetics and other fields, the market is limited, and it is not su...

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Problems solved by technology

[0002] Adding a modifier to anhydrous ethanol can form denatured fuel ethanol, and blend it with gasoline in a certain proportion to form ethanol gasoline for vehicles, which is used as fuel for ignition internal combustion engines. Therefore, it plays an important role in the petrochemical field and is a clean With the new trend of energy development, the main methods for preparing absolute ethanol are extraction and adsorption. The extraction method introduces a third component into the original alcohol-water component, such as benzene, ethylene glycol, cyclohexane, etc. The disadvantage of the extraction method is that the energy consumption is high, the product will contain the extractant, it cannot be used in food, medicine, cosmetics and other fields, the market is limited, and it is not suitable for large-scale production. The commonly used adsorbents in the adsorption method include lime, activated carbon, and ion exchange resin. , molecular sieve, silica gel, etc., the molecular sieve adsorption method has been vigorously promoted due to its high dehydration efficiency, less impurities, and simple operation. However, due to the strong adsorption capacity of molecular sieves, it will absorb moisture in the air when the machine is shut down, causing inconvenience to use, and this solution does not solve this technical defect. Moreover, in the dehydration of absolute alcohol During the process, the quality of the alcohol used for dehydration is the key to the quality of the finished anhydrous alcohol. If the alcohol content of the raw material alcohol used for dehydration is too low, the molecular sieve cannot be loaded, and the output will be low. Moreover, if the alcohol used for dehydration is of poor quality, it will be serious Affect the quality of anhydrous alcohol, at the same time, the distillation process consumes the most energy in the alcohol process, how to improve the distillation device to reduce energy consumption is a major measure to reduce costs, for example, Chinese patent CN 1736527 A discloses an alcohol five-tower differential pressure distillation device And its process, this technology uses a combination of multiple heat reuse technologies to reduce the steam consumption index and achieve the effect of saving energy and reducing consumption. However, using this method to improve the device is relatively complicated and the improvement cost is high. Therefore, in the absence of In the water-alcohol processing method, it is necessary to solve the following problems (1) further reduce the energy consumption of the alcohol production process through reasonable improvement; (2) further protect the alcohol equipment for molecular sieve dehydration

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