4 -二恶烷是一个叫做乙氧基化的化学加工过程的副产品，在这个过程中，化妆品原料和环氧乙烷一起进行处理。
4-dioxane is a byproduct of a chemical processing technique called ethoxylation, in which cosmetic ingredients are processed with ethylene oxide.
本系列产品是以乙二醇为起始剂与环氧乙烷聚合制得的化合物。
This series products are compounds polymerized from ethylene oxide as initiating agent and EO.
冗余高压连锁切断了向环氧乙烷反应工段的供料，以及供至远低于泄放压力的环氧乙烷净化工段的所有热源。
Redundant high-pressure interlocks cut off feeds to the EO Reaction Section and all heat sources to the Ethylene Oxide Purification Section far below the relieving pressure.
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