second stage hydrogenationとは 意味・読み方・使い方

This method for hydrogenation desulfurization of the gas oil is characterized by hydrogenation-desulfurizing the gas oil containing sulfur content by making a contact with the following catalyst (1) at a first stage, and then making a contact with the following catalyst (2) at a second stage to reduce sulfur content to ≤10 ppm in the gas oil.例文帳に追加

硫黄分を含有する軽油を、第一段目で下記触媒（１）と接触させて水素化脱硫し、次いで第二段目で下記触媒（２）と接触させて水素化脱硫して軽油中の硫黄分を１０ｐｐｍ以下にすることを特徴とする軽油の水素化脱硫方法。 - 特許庁