The New Diesel Low Temperature Fluidity Improving Agent Developed

The text relates to the development and synthesis of new kind diesel fuel low-temperature flow improver, which is composed of the following parts:(1) there kinds of alkyl methacrylate are synthesized, which are units of the DFI polymers. The optimal experiment conditions are studied, the structures are identified by thin-layer chromatography, IR spectroscopy, 1H NMR spectroscopy and glass capillary gas chromatography. The amount of product is over 90%, which satisfied the request of the next polymerization;(2) On the base of above experiment ,ten series of polymers are produced by using methylacrylate, styrene, maleic anhydride, vinyl acetate, hexadecylamine, and octadecylamine as raw materials. The polymer structure and conversion is tested by IR spectroscopy ,Wu Shi viscosity testing and Molecular weight apparatus. The method has advantage in short step ,high conversion and low cost.(3)Glass capillary gas chromatography is used in the analysis of n-paraffin distribution of the diesel,and according to the results of the cold filter plugging point test ,it is conclude that the impressibility of DFI to fuel is not only connected with the alkyl side chain and the polarity group of medicine oneself ,but also the n -paraffin distribution of the diesel ,the component ,technology and directions for producing of fuel and so on.(4)For increasing the oil dissolving property and dispersion of DFI ,various surface active agent are used in different proportion with every kind of polymer together, that developed a series of DFI;(5) The help function of DFI are further evaluated. The improver is applied to the diesel fuel of Dalian Petrochemistry Filiale,produced by crude oil from Daqing as raw material,CFPP of the 0# diesel fuel is lowed by 3 to 5℃.The improver is applied to the diesel of Huludao Petrochemistry Filiale ,produced by paraffin rich crude oil and intermediate crude oil as raw material ,CFPP of the 0# diesel is lowed by 3 to 5 ℃.