Diethylene glycol was selected as sovlent of extraction separation for DEM and Ethanol aqueous.The effects of the the theory plate numbers and the ratio of raw material/solvent to extraction separation were researcheh...Diethylene glycol was selected as sovlent of extraction separation for DEM and Ethanol aqueous.The effects of the the theory plate numbers and the ratio of raw material/solvent to extraction separation were researcheh.The results show that recovery ratio of DEM reach 99%.The pure component of DEM reachs 995%.The simulation results were provided for middle test.展开更多
The synthesis of diethoxy methane was studied using ethanol and formaldehyde as the raw materials and toluene-p-sulfonic acid as the catalyst.It was found that when the mole ratio of ethanol to formaldehyde was 3.97∶...The synthesis of diethoxy methane was studied using ethanol and formaldehyde as the raw materials and toluene-p-sulfonic acid as the catalyst.It was found that when the mole ratio of ethanol to formaldehyde was 3.97∶[KG-*3/5]1,the mole ratio of toluene-p-sulfonic acid to the total raw materials 7%,the reaction temperature 25 ℃,the stirring speed 70 r/min and the reaction time 10 min,the yield of DEM was about 90.4%.Under the above reaction conditions,the yield was about 62.3% using HCl as the catalyst,and the amount of water in the product was higher and the waste acid in the continuous reaction would pollute the environment.In(addition) toluene-p-sulfonic acid can be used repeatedly.Therefore,this synthesis method is useful the practical production of diethoxy methane.展开更多
文摘Diethylene glycol was selected as sovlent of extraction separation for DEM and Ethanol aqueous.The effects of the the theory plate numbers and the ratio of raw material/solvent to extraction separation were researcheh.The results show that recovery ratio of DEM reach 99%.The pure component of DEM reachs 995%.The simulation results were provided for middle test.
文摘The synthesis of diethoxy methane was studied using ethanol and formaldehyde as the raw materials and toluene-p-sulfonic acid as the catalyst.It was found that when the mole ratio of ethanol to formaldehyde was 3.97∶[KG-*3/5]1,the mole ratio of toluene-p-sulfonic acid to the total raw materials 7%,the reaction temperature 25 ℃,the stirring speed 70 r/min and the reaction time 10 min,the yield of DEM was about 90.4%.Under the above reaction conditions,the yield was about 62.3% using HCl as the catalyst,and the amount of water in the product was higher and the waste acid in the continuous reaction would pollute the environment.In(addition) toluene-p-sulfonic acid can be used repeatedly.Therefore,this synthesis method is useful the practical production of diethoxy methane.
