6 results about "Automotive catalyst" patented technology

This utility model discloses a flow-diversion and temperature control device for an automotive catalyst oxygen storage capacity evaluation bench system, belonging to the field of automotive catalyst oxygen storage capacity evaluation bench systems. The device includes an execution unit and a control unit. The execution unit is connected to the engine exhaust manifold outlet and includes a flow-diversion mechanism and a temperature control mechanism. When the engine is running, the flow-diversion mechanism diverts the engine exhaust gas source to control the exhaust gas flow rate entering the catalyst body. The temperature control mechanism is located at the inlet of the flow-diversion mechanism and is used to control the temperature of the engine exhaust gas source. The control unit controls the execution unit. This device solves the problem that conventional engine bench systems with single-pipe structures cannot adjust the exhaust flow rate during automotive catalyst oxygen storage capacity evaluation testing, and the problem of catalyst inlet temperature fluctuations caused by long stabilization times before and after rich / lean switching of the excess air coefficient, ensuring the accuracy of oxygen storage capacity testing.

The invention discloses a method for efficiently leaching platinum group metal in a waste automobile catalyst, and belongs to the field of rare and precious metal smelting. The method comprises the following steps: a leaching process: mixing the hulled waste automobile catalyst with a leaching agent, carrying out acid leaching in an acidic solution for a period of time, adding a complexing agent to complex platinum group metals, leaching for a period of time, and filtering to obtain a pregnant solution rich in the platinum group metals and carrier residues; wherein the leaching agent is a cerium-containing compound; a resin adsorption process: adsorbing the pregnant solution through an adsorption column filled with adsorption resin to obtain an adsorbed solution; and an elution process: washing the adsorbed adsorption resin with water and eluting the platinum group metal step by step, and regenerating the eluted adsorption resin for cyclic utilization. The method aims at avoiding generation of toxic and harmful substances (chlorine and NOx) and use of highly toxic cyanide in an existing wet process, environmental pollution and potential safety hazards are fundamentally eliminated, and meanwhile the leaching efficiency of the platinum group metal is remarkably improved.

The disclosure relates to an automotive catalyst system which can be used to selectively reduce carbon monoxide. The system comprises a first close coupled three-way conversion catalytic article in fluid communication with an engine exhaust outlet, a catalytic article located downstream of and in fluid communication with the first close coupled three-way conversion catalytic article, a tail-pipe catalytic article arranged downstream in fluid communication and 1.0 to 10 feet away from the catalytic article at a position chosen from before or behind a resonator, before or after a muffler, between the resonator and the muffler, inside the muffler, inside the resonator, and at a tail pipe end.

The invention provides a method for synergistically recovering rare and noble metals in a waste lithium battery and a waste automobile catalyst, which comprises the following steps: mixing black powder of the waste lithium battery, sublimed sulfur and a carbon source, and then adding desulfurized gypsum or calcium sulfate to obtain a mixed material; placing the mixed material in an inert atmosphere or under a vacuum condition, and performing sulfuration reduction roasting to obtain a roasted product; the roasted product is added into water to be subjected to water leaching treatment, suction filtration separation is conducted after stirring leaching, and a lithium sulfate solution and water leaching residues are obtained; and drying the water leaching residues, uniformly mixing the dried water leaching residues with a waste automobile catalyst and a slagging compensation agent, and carrying out matte smelting in a high-temperature smelting container to obtain nickel-cobalt matte enriched with platinum group metals (PGMs) and smelting slag. The lithium recovery rate can reach 99% or above, the nickel recovery rate exceeds 99%, the cobalt recovery rate exceeds 98%, and the recovery rate of platinum group metals (PGMs) is 90% or above.

The invention belongs to the technical field of precious metal recovery, and particularly relates to a method for recovering platinum group metal through one-step smelting of a waste automobile catalyst and iron tailings for electric furnace steelmaking. The method comprises the following steps: (1) uniformly mixing the waste automobile catalyst, the iron tailings for electric furnace steelmaking, a carbon reducing agent and a slag former in proportion, putting the mixture into an alumina crucible, and directly putting the alumina crucible into a high-temperature furnace, wherein the mass ratio of the waste automobile catalyst to the iron tailings for electric furnace steelmaking is (30-55): (45-70); and (2) volatile moisture removal, in-situ reduction of iron oxide and slag-metal separation operation are continuously completed in the same furnace body through pre-roasting at the temperature of 800-950 DEG C in the first section and smelting at the temperature of 1450-1550 DEG C in the second section. According to the method, the platinum group metal is efficiently recycled through the carbon thermal reduction and melting coupling technology, meanwhile, two kinds of dangerous solid waste are cooperatively treated, the using amount of an additional slag former and an iron trapping agent is remarkably reduced, and the method has the advantages of being simple in process, high in recycling rate, excellent in economical efficiency and the like.

The utility model relates to a kind of anti-seepage automobile catalyst slurry coating devices, which is composed of fixed parts, slurry containing parts, anti-seepage sealing parts and anti-seepage sealing fixed parts from top to bottom.The device fixed part is a square plate with a central circular hole.The slurry containing part is a cuboid, with two faces of length and width as the center, and a downward inner conical hole is opened through the center.The anti-seepage sealing part is a square flexible waterproof rubber with a certain thickness, with an inner circular hole opened through the center with a certain radius.The center line of the inner circular hole coincides with the center line of the inner conical hole of the slurry containing part, and anti-seepage sealing part fixing bolts are passed through the holes around the square edges.The utility model has the advantages of simple structure, convenient storage, quick maintenance and low cost, and is an ideal anti-seepage automobile catalyst slurry coating device for silicon carbide / mullite honeycomb carrier.