n-Butylacetate is synthesized using H2SO4-K2Cr2O7 modified coal activated carbon as catalyst.Factors influencing the reaction are discussed.It is showed that the fractional conversion of acetic acid could reach 99.2% ...n-Butylacetate is synthesized using H2SO4-K2Cr2O7 modified coal activated carbon as catalyst.Factors influencing the reaction are discussed.It is showed that the fractional conversion of acetic acid could reach 99.2% when the molar ratio of acid to n-butanol is 1∶1.5,reaction time is 2.5h,the amount of catalyst is as 5.26% as the mass of total reactants.In addition,the catalyst can be used repeatedly and has no pollution to environment.展开更多
[目的]探讨浓H2SO4浸种处理对狭叶山黄麻种子萌发的影响。[方法]采用浓H2SO4浸种处理,设置1、3、5、7、9、11、13 min 7个浸种时间,研究浓H2SO4处理对狭叶山黄麻种子发芽势和发芽率的影响。[结果]浓H2SO4处理对狭叶山黄麻种子的萌发有...[目的]探讨浓H2SO4浸种处理对狭叶山黄麻种子萌发的影响。[方法]采用浓H2SO4浸种处理,设置1、3、5、7、9、11、13 min 7个浸种时间,研究浓H2SO4处理对狭叶山黄麻种子发芽势和发芽率的影响。[结果]浓H2SO4处理对狭叶山黄麻种子的萌发有极显著的影响,不同处理时间狭叶山黄麻种子发芽率和发芽势有较明显的差异。[结论]在处理时间为9 min时,狭叶黄麻种子发芽势和发芽率均达到最高,分别为45.00%、82.67%。展开更多
文摘n-Butylacetate is synthesized using H2SO4-K2Cr2O7 modified coal activated carbon as catalyst.Factors influencing the reaction are discussed.It is showed that the fractional conversion of acetic acid could reach 99.2% when the molar ratio of acid to n-butanol is 1∶1.5,reaction time is 2.5h,the amount of catalyst is as 5.26% as the mass of total reactants.In addition,the catalyst can be used repeatedly and has no pollution to environment.
文摘[目的]探讨浓H2SO4浸种处理对狭叶山黄麻种子萌发的影响。[方法]采用浓H2SO4浸种处理,设置1、3、5、7、9、11、13 min 7个浸种时间,研究浓H2SO4处理对狭叶山黄麻种子发芽势和发芽率的影响。[结果]浓H2SO4处理对狭叶山黄麻种子的萌发有极显著的影响,不同处理时间狭叶山黄麻种子发芽率和发芽势有较明显的差异。[结论]在处理时间为9 min时,狭叶黄麻种子发芽势和发芽率均达到最高,分别为45.00%、82.67%。
