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在美国石油化学已成为石油工业不可分割的一部分,石油化学品不但可用天然气,还可用石油加工工业的各项产品,主要是副产品,如热裂气体或精馏废气等制备,今日已可做为接近5000种化学品的工业原料。从石油化学原料发展和制备的新化学品正在不断增长。一方面将已知的化学品或是它们衍生物的制法加以改善或现代化,因而符合于新的要求,另一方面从中间体又开展了许多新的用途。所以在美国,近年来也
Petrochemicals in the United States have become an integral part of the oil industry. Petrochemicals can be used not only for natural gas but also for various products of the petroleum processing industry, mainly by-products, such as pyrogen gas or rectification gas, which can be used today as Industrial raw materials for nearly 5000 chemicals. New chemicals developed and prepared from petrochemical feed stocks are constantly growing. On the one hand, improvements or modernization of the known chemicals or their derivatives have been made, thus meeting the new requirements. On the other hand, many new uses have been carried out from intermediates. So in the United States, too in recent years