36results about How to "Economic recycling" patented technology

A molded article such as a floor tile is made from recycled carpet waste which includes a polyvinyl chloride component in the backing material and fiber component having a melting point above the melting point of polyvinyl chloride. A mixture of the recycled carpet material is shredded and additional polyvinyl chloride is fed to an extruder where the polyvinyl chloride is melted without melting the carpet fibers. The resulting mixture is discharged and molded, such as by injection molding, to form a molded product. The molded product includes a continuous matrix of polyvinyl chloride having recycled carpet fibers uniformly dispersed therein. The molded article contains about 45% to about 85% of polyvinyl chloride, about 5% to about 20% of recycled carpet fibers, up to about 5% of a plasticizer and up to about 5% of an ethylene copolymer by weight based on the total weight of the product. The finished product preferably contains about 10% to about 75% by weight of recycled vinyl-backed carpet and about 25% to about 90% by weight of a flexible polyvinyl chloride based on the total weight of the product.

The invention relates to a method for recovering precious metal palladium from aniline tar. The method includes the following steps that aniline tar raw materials are heated to 80 DEG C, the PH is adjusted, a precious metal collector is added, constant temperature heating is carried out, stirring is carried out, standing depositing is carried out, cooling and filtering are carried out, filter residues are reserved and burned in a muffle furnace, ash is collected and reserved after burning is complete, mixed acid is added, boiling is carried out after stirring, complete dissolving is carried out, cooling and filtering are carried out, filter residues are collected and treated, filter liquor is reserved and is subject to concentration and nitre expelling, then iron replacement is carried out, cooling and filtering are carried out, filter liquor is subject to secondary recovering, filter residues are reserved and washed until water obtained after washing is neutral, filter residues are dried, coarse palladium is obtained, and the coarse palladium is refined to obtain sponge palladium. The method has the beneficial effects that the problem of losses of the palladium in the burning process is solved, the problem that palladium oxide is generated in the burning process is solved, the metal palladium recovering rate is improved, the recovering cost is reduced, and the recovering period is shortened.

The invention relates to a method for extracting and separating coal tar waste residue. The purpose of the present invention is to solve the technical problems existing in the existing method of solvent extraction and separation of coal tar waste residue, which easily cause secondary environmental pollution, expensive extraction agent, high operating cost and complicated process. The technical solution adopted in the present invention is, under normal temperature and pressure, using a composite extractant composed of furfural and ester solvents, through the steps of extraction, separation, distillation and washing, the tar, coal powder, and coke in the coal tar waste residue are extracted. In the process of extraction, the amount of the composite extractant used is 1 to 3 times the mass of the coal tar waste residue. The composition of the composite extractant of the invention is cheap and easy to obtain, all of which have low toxicity and high separation efficiency. The whole extraction and separation operation process is carried out under normal temperature and pressure conditions, the process is simple, and the energy consumption and operation cost are low.