Chinese name of N-methyl pyrrolidinone: English name of N-methyl pyrrolidinone: Chinese alias of 1-methyl-2-pyrrolidinone: NMP; 1-methyl-2-pyrrolidinone; N-methyl pyrrolidinone (industrial grade); N-methyl pyrrolidinone (electronic grade) < br/> CASRN.:872-50-4 Molecular Formula: C5H9NO Physicochemical Properties: Colorless transparent oily liquid, slightly amine odor. Melting point - 24.4 Boiling point 203 Relative density 1.0260 Refractive index 1.486 Flash point 95 Solubility is intersoluble with water, alcohol, ether, ester, ketone, halogen and aromatics.
Application of N-methyl pyrrolidone: It is widely used in the environmental protection treatment of waste liquids such as advanced lubricating oil refining, polymer synthesis, insulating materials, pesticides, pigments and cleaning agents. Used, dirty waste N-methyl pyrrolidone can be recycled through solvent recovery machine and vacuum decompression system. Because of its high boiling point, direct recovery method can not be adopted. Vacuum decompression can reduce the heating temperature of recovery, ensure the quality of recovery and improve the safety factor of recovery. It can be seen from the above properties that the substance and water can dissolve each other. The exothermic heat you find is only the heat released from the dissolution of the substance into the water, which is similar to the concentration. Sulphuric acid also gives off a lot of heat when added to water. Adherent heat of dissolution: refers to the thermal effect of a certain mass of solutes dissolved in solvents at a certain temperature and pressure (usually at 298K and 100kPa). Equal to the heat emitted or absorbed when a mole of solute dissolves in a large volume of solvent.