2results about How to "Low cracking temperature" patented technology

This invention discloses a method for preparing high-quality tire oil through catalytic pyrolysis of waste tires. The method uses a eutectic solvent formed by choline chloride and ferric chloride hexahydrate as a low-temperature phase change medium, which functions as a heat carrier, swelling agent, catalyst, and sulfur capture agent. Waste tire rubber powder is mixed with this medium, and a low-temperature swelling and pyrolysis desulfurization reaction is carried out under an inert atmosphere. The Lewis acidity of iron ions in the medium preferentially breaks the C-S and S-S bonds in the rubber crosslinking bonds. The sulfur-containing active species generated by the breakage are captured in situ as inorganic sulfides and retained in the liquid phase. The escaped oil vapor is condensed to directly obtain ultra-low sulfur, light-colored, transparent, high-quality tire oil. The used medium can be oxidized and regenerated by introducing air under heating conditions, and the sulfur is recovered in the form of elemental sulfur, allowing the medium to be recycled. This invention achieves synergistic unity of low-temperature pyrolysis and deep desulfurization at the source, with a simple process flow that is economical and environmentally friendly.

The invention discloses an oil smoke reverse suction prevention device for an internal thread copper pipe, which relates to the technical field of non-ferrous metal processing and is used for being mounted on an annealing purging rod, an air inlet is formed in the annealing purging rod, the annealing purging rod comprises an air guide head, a conical air separation cover and a spring, the air guide head is arranged on the annealing purging rod, and the conical air separation cover is arranged on the air guide head. A gas guide head inlet and a gas guide head inner hole which are communicated with each other are formed in the gas guide head, the gas guide head inner hole is communicated with the gas inlet, the conical gas insulation cover is arranged in the annealing purging rod, one side of the conical gas insulation cover is over against the gas inlet, and the other side of the conical gas insulation cover is connected with the inner wall of the annealing purging rod through a spring. By arranging the oil smoke suck-back prevention device for the internal thread copper pipe on the air inlet of the finished annealing purging rod, inert protective gas can be conveniently guided into the annealing purging rod, meanwhile, oil smoke gas in the atmosphere in a furnace in the annealing process can be effectively prevented from being sucked back into the inner wall of the copper pipe after inert gas purging is completed, and the service life of the copper pipe is prolonged. Oil smoke is prevented from entering the copper pipe for secondary cooling condensation, so that the residual oil value of the inner wall of the copper pipe is reduced.