Diesel vehicle tail gas treatment liquid and preparation method thereof

Abstract

The invention discloses diesel vehicle tail gas treatment liquid and a preparation method thereof, and relates to the technical field of colorant preparation methods, in the diesel vehicle tail gas treatment liquid, the ratio of industrial urea to pure water is 1.5: 1, which is the optimal ratio of the tail gas treatment liquid, and a stabilizer is added in the preparation process of the tail gas treatment liquid, the reaction performance in the preparation process of the tail gas treatment liquid can be changed through the stabilizer, the stability of the tail gas treatment liquid is improved, the injury to experimenters caused by large reaction is avoided, and the pungent smell generated by iminodicarbonate diamide can be reduced; in the preparation step of the tail gas treatment liquid, after crystal substances are separated out, hydrolysis treatment is carried out again for at least three times, the purity of the tail gas treatment liquid is effectively improved, in actual use, the freezing point of the treatment liquid can be reduced to -22 DEG C, the tail gas treatment liquid needs to be completely frozen, and the temperature needs to be -39 DEG C, and thus the requirements of part of extremely cold areas in northern China are greatly met.

Description

technical field [0001] The invention relates to the technical field of colorant preparation methods, in particular to a diesel vehicle tail gas treatment liquid and a preparation method thereof. Background technique [0002] Compared with gasoline engine vehicles, diesel engine vehicles have better power performance, high thermal efficiency, fuel saving, and lower greenhouse gas emissions; however, the nitrogen oxides and particulate matter in the exhaust emissions of diesel vehicles are higher than those of gasoline engines. In order to reduce the nitrogen oxides and particulate matter in the exhaust emission of diesel vehicles, domestic and foreign automobile manufacturers have adopted a selective catalytic reduction (SCR) technology to treat the exhaust of diesel vehicles to meet the national VI emission standards. [0003] The traditional exhaust gas treatment fluid for diesel vehicles is extremely unstable when reacting, and will produce a lot of pungent odors, and will...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a diesel vehicle exhaust gas treatment liquid and its preparation method to solve the problem that the traditional diesel vehicle exhaust gas treatment liquid proposed in the above background technology is extremely unstable during reaction, and It will produce a lot of pungent smell, and it will freeze below -11°C, and it will be completely frozen at -20°C. For the problem that diesel vehicles in some parts of northern my country cannot be used normally in winter