42results about How to "Polygeneration" patented technology

The invention discloses a method and an apparatus for recycling metal oxide from a waste flue gas denitration catalyst. The method comprises the following steps: S1, the catalyst is crushed and concentrated sulfuric acid is added for acidolysis, after acidolysis, water is added to obtain a titanyl sulfate solution; S2, the titanyl sulfate solution is filtered, filter residues are standby, a filtrate is heated, condensed and hydrolyzed for obtaining a hydrolysate; S3, the hydrolysate is filtered to obtain a filtrate and a metatitanic acid deposition; S4, salt treatment, a drying and a calcination are carried out for the metatitanic acid deposition, and TiO2 is obtained; S5: sedimentation treatment is carried out for the filtrate in the S3, after filtering, a upper level clear liquid is taken, excessive NH4Cl is added into the clear liquid for reaction, after filtering, andammonium metavanadate deposition is obtained; the ammonium metavanadate deposition is calcined, and V2O5 is obtained; S6, excessive ammoniacal liquor is added into the filter residues in the S2 for reaction, and a filtering is carried out; a filtrate is heated to generate a ammonium paratungstate crystal; the ammonium paratungstate crystal is dried and calcined, and WO3 is obtained. According to the method, V, Ti and W three components can be completely separated.

The invention discloses a method and device for recycling Ti and V from a waste flue gas denitrification catalyst. The method comprises the following steps that 1, the catalyst is smashed, concentrated sulfuric acid is added for acidolysis, and water is added after acidolysis is performed to obtain a titanyl sulfate solution; 2, the titanyl sulfate solution is filtered, filter residues are collected for use, and a filtrate is heated and concentrated for hydrolysis to obtain a hydrolysis product; 3, the hydrolysis product is filtered to obtain a filtrate and metatitanic acid sedimentation; 4, salt treatment, drying and roasting are performed on the metatitanic acid sedimentation to obtain a finished product TiO2; 5, sedimentation treatment and filtering are performed on the filtrate in the third step, a supernatant is taken, excessive NH4Cl is added into the supernatant for a reaction, and filtering is performed to obtain ammonium metavanadate sedimentation; the ammonium metavanadate sedimentation is roasted to obtain pure V2O5. The method can recycle pure TiO2 and V2O5 from the waste flue gas denitrification catalyst.

The invention discloses a method and device for recycling Ti and W from a waste flue gas denitrification catalyst. The method comprises the steps that 1, the catalyst is smashed, concentrated sulfuric acid is added for acidolysis, and water is added after acidolysis is performed to obtain a titanyl sulfate solution; 2, the titanyl sulfate solution is filtered, filter residues are collected for use, and a filtrate is heated and concentrated for hydrolysis to obtain a hydrolysis product; 3, the hydrolysis product is filtered to obtain a filtrate and metatitanic acid sedimentation; 4, salt treatment, drying and roasting are performed on the metatitanic acid sedimentation to obtain a finished product TiO2; 5, excessive ammonium hydroxide is added into the filter residues in the second step, and filtering is performed, and the filtrate is heated to generate ammonium paratungstate crystals; the ammonium paratungstate crystals are dried and roasted to obtain pure WO3. The method can recycle pure TiO2 and WO3 from the waste flue gas denitrification catalyst. After the method is adopted, the recycling efficiency of TiO2 and the recycling efficiency of WO3 reach 95% and 93% respectively, and the purity of TiO2 and the purity of WO3 can reach 99% and 90% respectively.

The invention provides a method using the quality-based utilization of low-rank coal to prepare methanol and oil in a poly-generation manner. The method has the advantages that the dried low-rank coalis subjected to gasification reduction to obtain volatile components, hydrocarbon and the like in the volatile components is reformed and converted to obtain CO and H2 needed by oil synthesizing so as to prepare the methanol and the oil, and the volatile components in the low-rank coal are sufficiently and effectively utilized; by using the quality-improved coal obtained by the gasification reduction of the low-rank coal as the raw material to prepare the methanol and the oil, the coal substances in the low-rank coal are fully utilized; the methanol and the oil are prepared in the poly-generation manner, byproducts generated by the synthesizing process of the methanol or the oil can be effectively recycled, resources can be saved, multiple approaches are achieved, the prepared oil and methanol are few in impurities and high in quality, the utilization rate of the low-rank coal is increased greatly, and the method conforms to efficient and clean coal utilization vigorously advocated byChina.