36 results about "Zirconium(IV) hydroxide" patented technology

A catalyst composition prepared from (a) titanium tetrahydrocarbyloxide, (b) zirconium tetrahydrocarbyloxide, and (c) tetraalkyl ammonium hydroxide, wherein the molar ratio of Zr:Ti is from about 0.02:1 to about 5:1 and the molar ratio of TAAH:(Ti+Zr) is from about 0.05:1 to about 2:1.

The invention relates to a solid super acid and a preparation method, a glycerol cyclohexanone ketal compound and a preparation method. Wherein, the preparation method of the solid superacid catalyst comprises the following steps: immersing zirconium hydroxide in 0.4mol / L-0.6mol / L ammonium persulfate aqueous solution, filtering to obtain a filter cake; drying and roasting the filter cake The solid superacid catalyst is obtained, wherein the mass volume ratio of the zirconium hydroxide and the aqueous ammonium persulfate solution is (0.114-16.6): 1 g / mL. The preparation method of the above-mentioned solid superacid catalyst is simple. It only needs to mix the zirconium hydroxide and the aqueous ammonium persulfate solution according to the above ratio, filter to obtain a filter cake, then dry and roast the filter cake to activate the catalyst, and finally obtain the S-containing 2 O 8 2‑ / ZrO 2 The solid superacid catalyst has good catalytic activity and high product selectivity.

The invention relates to the technical field of aromatic hydrocarbon oil catalysis and discloses an acid mesoporous zirconium phosphate pillared activated clay de-olefin catalyst. The de-olefin catalyst is prepared from mesoporous zirconium phosphate and activated bentonite, wherein the mesoporous zirconium phosphate is pillared between activated bentonite layers; and the ratio of the mesoporous zirconium phosphate is 12.5-25wt%. The preparation method comprises the following steps: S1, adding a sulfuric acid solution into zirconium hydroxide, adding a mesoporous template agent and the activated bentonite, stirring and reacting, transferring into a reactor, and crystallizing to obtain a crystal compound; S2, centrifuging, washing and drying the crystal, and performing phosphoric acidtreatment on the crystal; and S3, washing, filtering and drying the crystal subjected to phosphate treatment, and calcining the crystal, thereby obtaining the acid mesoporous zirconium phosphate pillared activated clay de-olefin catalyst. The catalytic activity of the mesoporous zirconium phosphate pillared activated clay catalyst disclosed by the invention is obviously improved; and meanwhile, the catalyst is high in stability and long in service life.

The invention belongs to the technical field of scandium resource recovery, in particular to a method for recovering scandium from scandium-containing nickel-cobalt hydroxide, the method comprising the following steps: S1. acid leaching; S2. primary enrichment of scandium; S3. desorption ; S4. Secondary enrichment of scandium; S5. Drying. In the invention, zirconium hydroxide is used to enrich the scandium-containing nickel-cobalt solution once, and then the zirconium hydroxide is desorbed, and the scandium-containing desorption solution is enriched twice with alkali, so as to achieve recovery from the nickel-cobalt hydroxide intermediate product The purpose of scandium is that the zirconium hydroxide used can be used repeatedly and can be regenerated. The recovery rate of scandium is high, the treatment efficiency is high, the operation is simple, and impurity ions are not introduced into the system.