Solid addition-type diesel environmental protection anti-smoke additive and method for preparing the same

A method for preparing a solid addition-type diesel environmental protection anti-smoke additive, the method comprising:

• under a nitrogen atmosphere, adding to a high-pressure reactor 10-15 parts by weight of a solvent, 2-5 parts by weight of vinyl ferrocene, 20-40 parts by weight of vinyl acetate, and 1-3 parts by weight of a free radical initiator, to produce a first mixture;
• introducing a vinyl monomer to the first mixture while stirring;
• polymerizing a free radical in the presence of the first mixture;
• controlling a reaction temperature of a system to a temperature of 60-90° C. by controlling jacket cooling water or high-temperature constant-temperature water;
• injecting ethylene to maintain a pressure of the system at 4-7 MPa;
• under a condition of a constant temperature of the system, terminating a reaction when the pressure does not change for 60 min;
• cooling down a reaction product to a room temperature and releasing the pressure to an atmospheric pressure to obtain a crude product;
• performing atmospheric distillation for the crude product at a temperature of 90-150° C. to remove a petroleum ether and an unreacted raw material to obtain a white to yellow solid paste diesel anti-smoke oxidant at the room temperature;
• mixing the solid diesel anti-smoke oxidant obtained by the reaction with homotetramethylbenzene to produce a second mixture;
• performing extrusion molding for the mixture at a temperature of 50-70° C.;
• and
• cutting the second mixture into a flake agent, to obtain the solid addition-type diesel environmental protection anti-smoke additive.