73 results about "Zirconium titanate" patented technology

Disclosed is a method for making amorphous spherical particles of zirconium titanate and crystalline spherical particles of zirconium titanate comprising the steps of mixing an aqueous solution of zirconium salt and an aqueous solution of titanium salt into a mixed solution having equal moles of zirconium and titanium and having a total salt concentration in the range from 0.01 M to about 0.5 M. A stearic dispersant and an organic solvent is added to the mixed salt solution, subjecting the zirconium salt and the titanium salt in the mixed solution to a coprecipitation reaction forming a solution containing amorphous spherical particles of zirconium titanate wherein the volume ratio of the organic solvent to aqueous part is in the range from 1 to 5. The solution of amorphous spherical particles is incubated in an oven at a temperature ≦100° C. for a period of time ≦24 hours converting the amorphous particles to fine or ultrafine crystalline spherical particles of zirconium titanate.

The invention provides a method for treating reverse osmosis concentrated water. In the method, the process flows of a laminated filter, heterogeneous catalytic ozone oxidation reaction, an ozone destruction tower and a biochemical reaction tank are adopted. The method comprises the following steps of: adding sodium hypochlorite into the reverse osmosis concentrated water produced in the recycling process of oil refining production wastewater subjected to biochemical treatment and membrane process treatment, sterilizing, filtering by using the laminated filter, fully mixing with ozone, addinginto a reactor filled with a zirconium titanate catalyst and performing ozone oxidation; and performing biochemical treatment by using a biochemical reactor with special biological bacteria, wherein the chemical oxygen demand (COD) of effluent after the reverse osmosis concentrated water is treated is below 60mg / L.

The invention relates to fine-particulate zirconium titanates or lead zirconium titanates and a method for production thereof by reaction of titanium dioxide particles with a zirconium compound or a lead and zirconium compound. The titanium dioxide particles have a BET surface of more than 50 m2 / g. The lead zirconium titanates can be used for the production of microelectronic components.

The invention relates to a flue gas denitration integral type catalyst using a titanium-based ceramic as a carrier and a preparation method thereof. The invention is characterized in that the titanium-based ceramic is used as a first carrier, a zirconium titanate composite metal oxide is used as a second carrier, and CeO2 which is added with proper amounts of doped metal oxides is used as an active constituent. The quality of the first carrier is used as a benchmark, wherein the load content mass percentage of the zirconium titanate composite metal oxide is 2.5 to 40wt percent and the load content mass percentage of the CeO2 and the doped metal oxides which is used as the active constituent is 1 to 25wt percent. The adopted preparation method is to impregnate the Ce salt and the doped metal salt composite solution to prepare an active catalytic component coating after impregnating the titanium-based ceramic with a zirconium titanate composite sol and being roasted driedly to prepare acarrier coating. Compared with the prior art, the flue gas denitration integral type catalyst and the preparation method thereof not only improve the activity of the catalyst and expand a window of activity temperature in a low temperature, but also improve mechanicalness and the heat stability of the catalyst carrier. The flue gas denitration integral type catalyst and the preparation method areenvironmental protection, without a secondary pollution and reduce the loading of the active constituent.