烷基苯作为冷冻油的使用有限已有一段时间，基于烷基苯的冷冻油于1974年在美国商业化。烷基苯有两种基本类型，支链和直链（图1）。这些产物是通过在催化剂存在下使烯烃或氯化石蜡与苯反应而合成的。通常用于该反应的催化剂是氯化铝和氢氟酸。除了所使用的烯烃或氯化石蜡的类型外，烷基苯的结构还受催化剂（AlCl 3或HF）以及其他加工变量的影响。所示结构是支链和直链烷基苯的典型结构，但也存在其他结构。 除去催化剂后，产品通常被蒸馏成三个馏分（图2）。可以通过调整侧链（烯烃或氯化石蜡）的分子量以及改变其他变量来影响这些馏分的相对大小。因此，中重馏分的产量在很大程度上取决于需求和经济状况。引文:研讨会，ASHRAE交易，第81卷，第2部分，马萨诸塞州波士顿

Alkylbenzenes have been in limited use as refrigeration oils for some time, and alkylbenzene-based refrigeration oils were commercialized in the United States in 1974.There are two basic types of alkylbenzenes, branched and linear (Fig. 1). The products are synthesized by reacting an olefin or a chlorinated paraffin with benzene in the presence of a catalyst. Catalysts commonly used for this reaction are aluminum chloride and hydrofluoric acid.In addition to the type of olefin or chlorinated paraffin used, the structure of alkylbenzene is affected by the catalyst (AlC1 3 or HF) as well as other processing variables. The structures shown are typical ones for branched and linear alkylbenzenes, but other structures are also present.After removal of the catalyst, the product is normally distilled into three fractions (Fig. 2). It is possible to affect the relative size of these fractions by adjusting the molecular weight of the side chain (olefin or chlorinated paraffin) as well as by changing other variables. Therefore, the amounts of the middle and heavy fractions produced depend to a large extent on demand and economics.