[EN] METHOD OF PREPARING GLYCOL ESTERS WITH LOW COLOR AND PEROXIDE CONTENT<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ESTERS DE GLYCOL À FAIBLE TENEUR EN COULEUR ET EN PEROXYDE
申请人:SIBUR HOLDING PUBLIC JOINT STOCK CO
公开号:WO2019059800A1
公开(公告)日:2019-03-28
The present invention relates to the field of preparing glycol esters used as plasticizers in the manufacture of films for multilayered glass. In particular, the invention relates to a method for preparing triethylene glycol ester of 2-ethylhexanoic acid. The claimed method includes the steps of esterification, clarification of a crude ester by treating thereof with hydrogen peroxide and alkali metal metasilicate at a temperature of from 70 to 200ºC, inclusive, and allowing to stand for 0.5 to 1.5 hours, inclusive, to obtain a clarified ester, neutralization of acidic compounds in the clarified ester by treating thereof with an alkaline solution, filtration, and drying of the ester. The technical result of the invention is the development of an economical and safe method of preparing glycol esters that are characterized by low values of color, acidity and peroxide content.
本发明涉及制备用作多层玻璃薄膜制造中的增塑剂的乙二醇酯的领域。具体而言,该发明涉及一种制备2-乙基己酸三乙二醇酯的方法。所述方法包括酯化、通过在70至200ºC的温度下用过氧化氢和硅酸碱金属处理粗酯以澄清粗酯,并静置0.5至1.5小时以获得澄清酯,通过用碱性溶液处理澄清酯中的酸性化合物进行中和,过滤和干燥酯。该发明的技术效果是开发一种经济且安全的制备乙二醇酯的方法,其特点是颜色、酸度和过氧化物含量低。