Study On The Synthesis And Properties Of Copolymers As Low-Temperature Flow Improver For Diesel

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) The contents of n-paraffin and carbon number distribution in n-paraffin wax of diesel of Tuha and Dushanzi in Xinjiang were determined by high temperature gas chromatograph with capillary column (30m×0.25mm×0.25μm) and detector is flame imization detector (FID). Diesel of Tuha and Dushanzi were analyzed under above conditions. Results showed that n-paraffin was separated successfully from each other. The results of method would be regarded as an important reference for future research of pour point depression of diesel.(2) Four kinds of alkyl methacrylate are synthesized, which are units of the DFI polymers:The optimal experiment conditions are studied, the structures are identified bythin-layer chromatography﹑IR spectroscopy and H-NMR spectroscopy, and the amount of product is over 95%, which satisfied the request of the next polymerization;On the base of above experiment, diffierent series of polymers are produced by using methyl acrylate, acrylonitrile, maleic anhydride, hexadecyl amine and octadecyl amines raw materials. The polymer structure is tested by IR spectroscopy and H-NMR spectroscopy testing. The method has advantage in short step, high conversion, low cost and great benefit;(3) The help function of DFI are further evaluated. The improver is applied to the diesel fuel of Xinjiang produced by crude oil from Tuha, Dushanzi as raw material. CFPP of the Tuha 0#diesel fuel is lowered by 3 to 9℃, Tuha -10# diesel fuel is lowered by 3-6℃, Dushanzi-10# diesel fuel is lowered by 6-14℃. T1804 are used in different proportion with every kind of polymer together, that developed a series of DFI. 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 component, technology and directions for producing of fuel and so on. For increasing the oil...