上海第四制药厂在生产氯霉素的过程中,出产了副产品甲醛脂,学名二乙氧基甲烷,分子式为它是经过蒸馏,提取馏程80～90℃时的产物。其成份为C—0.577,H—0.115,O—0.308(均为重量比),无色液体,比重0.83,热值7400kcal/kg,沸点80—95℃。该厂曾将其与汽油混合作为汽车燃料实际使用了3个月。为了进一步弄清这种汽油——甲醛脂混合燃料在车用汽油机上使用时对各方面性能的影响,包括排污情况,上海内燃机研究所受第四制 Shanghai Fourth Pharmaceutical Factory in the production of chloramphenicol in the process, produced a by-product of formaldehyde, the name of diethoxy methane, the molecular formula for it is distilled, distillate 80 ~ 90 ℃ when the product. Its composition is C-0.577, H-0.115, O-0.308 (all by weight), a colorless liquid with a specific gravity of 0.83, a heating value of 7400 kcal / kg and a boiling point of 80-95 ° C. The plant had actually used it for 3 months with gasoline as a vehicle fuel. In order to further clarify the gasoline-formaldehyde aldehyde mixed fuel on the vehicle gasoline engine performance on all aspects of the impact, including sewage, Shanghai Institute of Internal Combustion Engine by the fourth system