By taking 3 chloro 4 methyl aniline as raw material,two solvent mixtures of naphtha and petroleum ether in a certain proportion,and through sulfonation 2 amino 4 chloro 5 toluene sulfonic acid was synthesized.The yiel...By taking 3 chloro 4 methyl aniline as raw material,two solvent mixtures of naphtha and petroleum ether in a certain proportion,and through sulfonation 2 amino 4 chloro 5 toluene sulfonic acid was synthesized.The yield of product was about 90%,and the recovery of solvents was over 95%.展开更多
对叔丁基苯甲酸甲酯(MPTBBA)的传统催化合成方法大多具有难以分离、易腐蚀设备的问题。采用磺酸型阳离子交换树脂催化剂,系统研究了催化合成MPTBBA过程中磺酸树脂种类、反应温度、催化剂用量及原料配比对催化性能的影响。采用D001磺酸...对叔丁基苯甲酸甲酯(MPTBBA)的传统催化合成方法大多具有难以分离、易腐蚀设备的问题。采用磺酸型阳离子交换树脂催化剂,系统研究了催化合成MPTBBA过程中磺酸树脂种类、反应温度、催化剂用量及原料配比对催化性能的影响。采用D001磺酸树脂为催化剂,在反应温度为120℃、甲醇与对叔丁基苯甲酸(PTBBA)摩尔比为8∶1、催化剂质量分数为10%的条件下,反应3 h PTBBA的转化率即可达到90%。对磺酸树脂催化剂的热稳定性及表面酸性的表征结果发现,催化剂具有较好的热稳定性,其催化活性与酸量有关,酸量越高磺酸树脂催化剂活性越高。该催化剂重复循环利用性能好、与产物易分离,具有广泛的工业应用前景。展开更多
The method for the sepration and determination of trace Cr(VI) exiting in mass Cr(III) has been researched. The method is highly sensitive and less interference, but is simple and useful for analysis trace Cr(VI).
文摘By taking 3 chloro 4 methyl aniline as raw material,two solvent mixtures of naphtha and petroleum ether in a certain proportion,and through sulfonation 2 amino 4 chloro 5 toluene sulfonic acid was synthesized.The yield of product was about 90%,and the recovery of solvents was over 95%.
文摘对叔丁基苯甲酸甲酯(MPTBBA)的传统催化合成方法大多具有难以分离、易腐蚀设备的问题。采用磺酸型阳离子交换树脂催化剂,系统研究了催化合成MPTBBA过程中磺酸树脂种类、反应温度、催化剂用量及原料配比对催化性能的影响。采用D001磺酸树脂为催化剂,在反应温度为120℃、甲醇与对叔丁基苯甲酸(PTBBA)摩尔比为8∶1、催化剂质量分数为10%的条件下,反应3 h PTBBA的转化率即可达到90%。对磺酸树脂催化剂的热稳定性及表面酸性的表征结果发现,催化剂具有较好的热稳定性,其催化活性与酸量有关,酸量越高磺酸树脂催化剂活性越高。该催化剂重复循环利用性能好、与产物易分离,具有广泛的工业应用前景。
文摘The method for the sepration and determination of trace Cr(VI) exiting in mass Cr(III) has been researched. The method is highly sensitive and less interference, but is simple and useful for analysis trace Cr(VI).