Separting components of asphalt

Abstract

A method of separating components of asphalt by using molecular templates wherein the separated components can be reassembled comprise the steps of: mixing a mixture of functional monomers with templa

Claims

1. A method of separating components of asphalt by using molecular templates, comprising the steps of:S1. mixing functional monomers with template molecules in a mass ratio of 5:1, adding trichloroethylene as a solvent, stirring at room temperature for 2 hours to disperse and mix the functional monomers with the solvent to obtain a mixed solution;S2. adding the mixed solution of the step S1 into a crosslinking agent of ethylene glycol dimethacrylate and an initiator of azobisisobutyronitrile, performing polymerization at 60°C, and with continuous introducing nitrogen, with a reaction time of 15 hours, to obtain a dark yellow polymer solid product;S3, placing the polymer solid product in a vacuum drying oven at 50°C for 24 hours, and taking out the dried polymer solid product and grinding them into powdery particles;S4. placing the powdery particles in a round bottom flask for refluxing, adding a mixed solvent, and then heating to reflux until the powdery particles change from dark yellow to white, and filtering and drying the white powdery particles to obtain a molecularly imprinted polymer for adsorbing the components of asphalt;S5. adding a solution of asphalt and the molecularly imprinted polymer of said step S4 into a container, shaking the sealed container for 2 hours, and then rinsing and desorbing the components of asphalt from the molecularly imprinted polymer, to obtain the components of asphalt.

2. The method of separating components of asphalt by using molecular templates of claim 1, wherein in the step S1, the mixture of functional monomers is a mixture of methacrylic acid, and ethyl methacrylate or aminoacrylic acid.

3. The method of separating components of asphalt by using molecular templates of claim 2, wherein in the step S1, the volume ratio of methacrylic acid to ethyl methacrylate or aminoacrylic acid is from 1:1 to 1:5.

4. The method of separating components of asphalt by using molecular templates of claim 1, the mass ratio of trichloroethylene to the functional monomers and the template molecules is 50:1 at step S1.

5. The method of separating components of asphalt by using molecular templates of claim 1, wherein the template molecule in the step S1 is selected as one of n-octane, benzene, and a mixed solution of phenanthrene and chrysene.

6. The method of separating components of asphalt by using molecular templates of claim 1, wherein in the step S2, the mass ratio of the crosslinking agent of ethylene glycol dimethacrylate to the mixed solution is 1:25; the mass ratio of the initiator of azobisisobutyronitrile to the mixed solution is 1:2,000.

7. The method of separating components of asphalt by using molecular templates of claim 1, wherein in the step S3, the size of the powdery particles is 200 mesh.

8. The method of separating components of asphalt by using molecular templates of claim 1, wherein the mixed solvent is a mixture of petroleum ether and dichloromethane in a volume ratio of 2:1.

9. The method of separating components of asphalt by using molecular templates of claim 1, wherein in the step S5, the concentration of the solution of asphalt is 10 mg / L.