• 不会形成光化学烟雾，也不会破坏臭氧层 • 来源丰富，价格低廉 • 超临界二氧化碳可很好地溶解一般有机化合物
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2 离子液体
完全由一种正离子和一种负离子组成，在室温下呈液态 的化合物，称之为室温离子液体。
离子之间作用力降低，晶格能下降，熔点下降，所以在 室温下呈液态。室温离子液体的特性：
1Байду номын сангаас 蒸汽压极小。
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7: A raw material or feed stock should be renewable rather than depleting, wherever technically and economically practicable. 8: Unnecessary derivations should be avoided whenever possible. 9: Catalytic reagent (as selective as possible) are superior to stoichiometric reagents
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4: Chemical products should be designed to preserve efficacy of function while reducing toxicity 5: The use of auxiliary substances(e.g. solvents, separation agents) should be made unnecessary wherever possible and innocuous when used. 6: Energy requirements should be recognized for their environmental and economical impacts and should be minimized.
