Electric Literature of 120-61-6, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 120-61-6, name is Dimethyl terephthalate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.
The reaction described in Example 1 was repeated, yielding the product from pure isobutyl alcohol.In a three-necked flask equipped with stirring blades0.3 mol of dimethyl terephthalate (DMT) was added,2 moles of isobutanol,The temperature was raised to 120 C,After the DMT was completely dissolved,17.46 g of Nafion resin was added,After the control reaction temperature between 127 ~ 137 ,So that the droplet dropping speed control in 3 to 6 drops per second,Every 7h add 2mol isobutanol,Add a total of two times,Reaction 21h after the end.After the ester interchange reaction is completed,The solid resin was filtered off,The crude product was then reactedWas added to the clean flask,And add a little porcelain pieces after vacuum distillation,Vacuum control in about 0.08MPa,Slowly increase the distillation temperature to no liquid drops,The distillation temperature did not exceed 142 C.The final product after vacuum distillation was analyzed by capillary gas chromatography,The composition is shown in Table 1 below.The isolated final product weighed 77.739 g,The theoretical amount of product was 83.50 g,The overall yield was therefore 93.1%
In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, Dimethyl terephthalate, other downstream synthetic routes, hurry up and to see.
Reference:
Patent; Shanghai Huayi Energy Chemical Co., Ltd.; Xu, Yunfeng; Zhao, Zhengkang; Ma, Jinqiang; Chen, Chen; Cui, Yunhue; Tan, Dong; (10 pag.)CN105693519; (2016); A;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics