双碳目标的提出对化工生产中精馏塔的节能提出了新要求。本文以N,N-二甲基乙酰胺-水二元混合体系为例,采用Aspen Plus V 11化工模拟软件对普通精馏技术和双效精馏技术进行模拟与优化,并对两种不同精馏技术的能耗和环境进行评价。模拟计...双碳目标的提出对化工生产中精馏塔的节能提出了新要求。本文以N,N-二甲基乙酰胺-水二元混合体系为例,采用Aspen Plus V 11化工模拟软件对普通精馏技术和双效精馏技术进行模拟与优化,并对两种不同精馏技术的能耗和环境进行评价。模拟计算结果表明,在相同的设计基础和分离要求下,采用双效精馏可明显降低分离能耗近40%且环境友好,具有较强的节能优势和较少的二氧化碳排放。另外,两种不同的双效精馏技术中,逆流双效精馏技术稍优于顺流双效精馏技术。展开更多
3,5-dimethyl phenyl isocyanate was prepared by the method of trichloromethyl chloroformate in 70% yield.New compound N,N′-di-(3,5-dimethyl)phenyl-3,6-dimethyl-1,4-dihydro-1,2,4,5-tetrazine-1,4-dicarboamide was synthe...3,5-dimethyl phenyl isocyanate was prepared by the method of trichloromethyl chloroformate in 70% yield.New compound N,N′-di-(3,5-dimethyl)phenyl-3,6-dimethyl-1,4-dihydro-1,2,4,5-tetrazine-1,4-dicarboamide was synthesized by reacting 3,5-dimethyl phenyl isocyanate and 3,6-dimethyl-1,6-dihydro-1,2,4,5-tetrazine.Its post-disposal method had been improved.yield being 30.8%.Byproduct 1,3-bis-(3,5-dimethyphenyl)-1,3-diazetidine-2,4-dione have not been reported,too.Their structures were conformed by IR, 1HNMR and elemental analysis.展开更多
文摘双碳目标的提出对化工生产中精馏塔的节能提出了新要求。本文以N,N-二甲基乙酰胺-水二元混合体系为例,采用Aspen Plus V 11化工模拟软件对普通精馏技术和双效精馏技术进行模拟与优化,并对两种不同精馏技术的能耗和环境进行评价。模拟计算结果表明,在相同的设计基础和分离要求下,采用双效精馏可明显降低分离能耗近40%且环境友好,具有较强的节能优势和较少的二氧化碳排放。另外,两种不同的双效精馏技术中,逆流双效精馏技术稍优于顺流双效精馏技术。
文摘3,5-dimethyl phenyl isocyanate was prepared by the method of trichloromethyl chloroformate in 70% yield.New compound N,N′-di-(3,5-dimethyl)phenyl-3,6-dimethyl-1,4-dihydro-1,2,4,5-tetrazine-1,4-dicarboamide was synthesized by reacting 3,5-dimethyl phenyl isocyanate and 3,6-dimethyl-1,6-dihydro-1,2,4,5-tetrazine.Its post-disposal method had been improved.yield being 30.8%.Byproduct 1,3-bis-(3,5-dimethyphenyl)-1,3-diazetidine-2,4-dione have not been reported,too.Their structures were conformed by IR, 1HNMR and elemental analysis.