INCREASING THE DEGREE OF EXTRACTION OF ORGANIC IMPURITIES OF RECTIFIED ALCOHOL

Y. Bulii, O. Obodovych, V. Sydorenko
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Abstract

Obtaining high quality rectified ethyl alcohol is a priority for the further development of the alcohol industry. The solution to this urgent problem is possible under the condition of deeper extraction and concentration of volatile alcohol impurities on the plates of the column equipment of the Distillation/Rectification Unit. In the columns of the Distillation/Rectification Unit simultaneously with the release of volatile alcohol impurities due to the esterification reaction is the formation of organic compounds that degrade its quality and reduce the yield of the final product. Thus, during the interaction of alcohols, acids, and aldehydes, the breakdown products of amino acids, sulfur compounds, and other components of the brew in the fermentation column are the formation of esters, aldehydes, and acetals of organic acids. The aim of the work was to determine the optimal technological modes of distillation of alcohol-containing intermediate products and by-products of the distillation/rectification process in the accelerating column, epuration of wash distillate in the epuration column, the concentration of rectified alcohol in the alcohol column, and its repeated epuration in the column of final clearance, under which the content of organic impurities in rectified ethyl alcohol would be the lowest. Materials and methods.  Research methods were analytical, chemical, physico-chemical with the use of instruments and research methods used in the production of rectified ethyl alcohol. The concentration of volatile alcohol impurities was determined on a gas chromatograph with a column of HP FFAP 50 m × 0.32 m. It is determined that to increase the degree of extraction of organic impurities it is necessary to ensure the concentration of ethyl alcohol in the column bottom of the accelerating column, which does not exceed 4% vol.; pasteurization zone in the rectification column increase to 10 plates, reduce the concentration of ethanol in the epurate to 22-29% by hydroselection of impurities; for hydroselection in the epuration column use free of impurities bottom products of the accelerating column. To improve the quality of rectified alcohol and reduce energy consumption by extending the contact time on the plates of steam and liquid, a promising direction is the use of mass transfer equipment of cyclic mode. The proposed measures require constant monitoring of technological parameters and provide for the operation of technological equipment in an automated mode.
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提高精馏酒精有机杂质的提取率
获得高质量的精馏乙醇是酒精工业进一步发展的重点。在精馏/精馏装置塔式设备板上对挥发性酒精杂质进行深度萃取和浓缩的条件下,解决这一紧迫问题是可能的。在精馏/精馏装置塔中,由于酯化反应而释放挥发性醇杂质的同时,还形成有机化合物,使其质量降低,降低最终产品的收率。因此,在醇、酸和醛的相互作用过程中,氨基酸、硫化合物和发酵柱中酿造物的其他组分的分解产物是有机酸的酯、醛和缩醛的形成。研究了精馏/精馏过程中含醇中间产物和副产物在加速塔中蒸馏、洗涤馏分在精馏塔中提纯、精馏酒精在精馏塔中的浓度以及精馏酒精在最终净化塔中的重复提纯的最佳工艺模式,在此模式下精馏乙醇中有机杂质的含量最低。材料和方法。研究方法为分析、化学、物理化学,使用了生产精馏乙醇所用的仪器和研究方法。采用HP FFAP 50 m × 0.32 m柱气相色谱仪测定挥发性醇杂质浓度。确定要提高有机杂质的萃取度,必须保证加速塔塔底乙醇浓度不超过4% vol;精馏塔巴氏灭菌区增加至10板,通过加氢选择杂质,将精馏物中乙醇的浓度降低至22-29%;对于提纯塔的加氢选择,使用无杂质的加速塔底产物。为了提高精馏酒精的质量,通过延长蒸汽与液体在平板上的接触时间来降低能耗,采用循环式传质装置是一个很有前途的方向。拟议的措施要求不断监测技术参数,并规定在自动化模式下操作技术设备。
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