求翻译：第二次世界大战爆发以后，化学工程的研究也转入了满足战争需要的轨道。40年代前期，在重大化工过程的开发中，即碳四馏分的分离和丁苯橡胶的乳液聚合、粗柴油的流态化催化裂化以及曼哈顿原子弹工程计划等,化学工程都发挥了重要作用是什么意思？

After the second world war broke out, chemical engineering research meets the needs of the war was also transferred to the track. Early 40, in the development of major chemical process, namely carbon four fractions of separation and the emulsion polymerization of styrene-butadiene rubber, fluidized

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After Second World War eruption, the chemical engineering research also changed over to has satisfied the track which the war needed.The 40's earlier periods, in the significant chemical process development, namely the carbon four fraction separations and the butadiene styrene rubber emulsion polyme

After the second world war broke out, chemical engineering research meets the needs of the war was also transferred to the track. Early 40, in the development of major chemical process, namely carbon four fractions of separation and the emulsion polymerization of styrene-butadiene rubber, fluidized

After the second world war broke out, chemical engineering research meets the needs of the war was also transferred to the track. Early 40, in the development of major chemical process, namely carbon four fractions of separation and the emulsion polymerization of styrene-butadiene rubber, fluidized