Study On Cold Filter Plugging Point Improver Agent For Daqing Diesel

The diesel oil cold filter plugging point(CFPP) improver agent is important in the diesel oil production. It may remarkably change the diesel oil the low temperature flow properties, then may open up the diesel oil distillation, enhances the diesel oil production rate, enhances the diesel oil quality, to increases the refinery the economic efficiency. It is from the 60's that starts the diesel oil pour point depressant research in domestic, but there still is some problems in the early development work:.First is the diesel performance target formerly was a pour point item, Second was the domestic development variety mainly still by imitates primarily. It dependent on the diesel oil. The most mainly question is only reducing the pour point but not reducing CFPP. Daqing diesel carbon numbers distribution mainly concentrates in C14 ~ C18. the peak value basically is close, carbon numbers distribution relative centralism. Combines to make or become the obvious normal distribution curve. Moreover C20 ~ C26 high carbon numbers wax contents are high. It needs to control the good improvement medicinal preparation component the molecular weight and it's distribution. It has the adsorption with high-carbon and the low-carbon wax phase match and eutectic. The suppression wax crystal growth can reduce CFPP. So when we prepare regarding the host polyacrylic acid senior ester amination, we must according to this carbon numbers to distribute screens the high carbon mellow senior amine the carbon chain length. This project study coldly filters the performance improvement medicinal preparation. It is by the acrylic acid-senior mellow-senior amine three Yuan polymers and multi-phase prescription which is composed with one kind of wax crystal dispersing agent in the system.the main agent preparation synthesis condition is: Esterification response is : The raw material acrylic acid and the mix senior mellow mole of ratiois 1.6, the ester catalyst and an acid mole of ratio is 0.01, esterification temperature 120 ~ 130 ℃,esterification time 5hr; Polymersation response is : Take AIBN as the initiator, its quantity is esterification product 0.8% ~ 1.2%, polymerization time 4hr;polymerization temperature is 110 ℃. Amidation response is: Take the senior mixed amine as the raw material, the amine/An acid mole of ratio is 0.4 ~ 0.6,Amidation temperature 220 ℃~ 230 ℃, amide time 2hr. The wax crystal dispersing agent is abietic acid diethylene glycol dinitrate\The acid radical amines. they duplicate match with the host medicinal preparation need to have the adjustment slightly according to the diesel oil composition. Two kinds duplicate match the system can cause Daqing diesel oil'CFPP to reduce 5 ℃, the pour point can reduces 12 ℃.