| 摘要 |
The process according to the invention consists in that the waste hydroinsulation materials, optionally preliminarily crushed to pieces not larger than 70 mm, are set in a sliding rotary motion and treated with an organic solvent having a boiling point up to 200°C in the form of liquid and vapour in a reverse flow. A solution of bituminous materials in the solvent is separated from the insoluble residue and subjected to distillation until a dense bituminous mass is obtained. The insoluble residue, consisting of the topping, mechanical impurities and fibre tissue, is administered to the sieving apparatus. The topping, in the form of stones, falls to the bottom of the apparatus and is moved to the topping tank. The mechanical impurities, which are larger than the openings on the sieve, remain in the sieve. The topping tank is filled with the same solvent that was used for the extraction of bituminous materials. The topping, moving to the topping tank, extrudes its solvent to the sieving apparatus, which prevents penetration of the bituminous material solution in the solvent to the topping tank. Other undissolved components of the hydroinsulation materials, i.e. fibre tissue, are treated with the solvent in a reverse flow and then dried. The organic solvent is xylene or 1,2-dichloroethane or a mixture of xylene and butyl acetate or a fraction of a pyrolysate with a boiling point ranging between 70- 110°C, obtained in a pyrolysis of polyethylene, containing approx. 67% by weight of olefins, 5% by weight of aromatic compounds and saturated hydrocarbons. |
