3 results about "Cobalt(II) acetate" patented technology

This invention belongs to the field of hydrogen storage material technology, specifically relating to a method for preparing a CoTi-MOF-derived bimetallic oxide catalyst, comprising the following steps: (1) mixing and stirring cobalt acetate, titanium tetrafluoride, trisodium citrate dihydrate, and water, and allowing it to stand to obtain a mixed solution; (2) mixing and stirring potassium cobalt cyanide and water, and allowing it to stand to obtain a potassium cobalt cyanide solution; (3) mixing and stirring 2-methylimidazole and water, and allowing it to stand to obtain a 2-methylimidazole solution; (4) stirring the mixed solution, the potassium cobalt cyanide solution, and the 2-methylimidazole solution, and allowing them to stand. After standing, the resulting product is centrifuged, washed, and dried to obtain a CoTi-PBA precursor; (5) calcining the obtained CoTi-PBA precursor to obtain a CoTi-MOF-derived bimetallic oxide catalyst. This invention also relates to oxide catalysts and their application in the preparation of lithium aluminum hydride hydrogen storage materials. The catalyst prepared by the method of this invention can significantly reduce the dehydrogenation temperature of lithium aluminum hydride materials and improve their hydrogen release efficiency.

The application discloses a kind of potassium doped modified cobalt nickel bimetallic organic framework CoNi-MOF-K, by cobalt acetate, nickel acetate, 1,2,3,4-butane tetracarboxylic acid synthesis CoNi-MOF, then, product is carried out hydrothermal reaction with potassium chloride, finally, the electrode material of potassium ion doped modified cobalt nickel bimetallic metal organic framework is obtained, simply called CoNi-MOF-K;The micro-morphology of CoNi-MOF-K is three-dimensional microsphere structure, and the surface of microsphere is composed of nanosheet, and dense pore structure is formed;The specific surface area of the electrode material is 24.3-27.4cm 2 g ‑1 . Its preparation method includes the following steps: 1, the preparation of CoNi-based precursor solution;2, the preparation of CoNi-MOF-K.As the application of supercapacitor, charge and discharge in the range of 0-0.55V, when the current density is 1A g ‑1 , the specific capacity reaches 900-1400F g ‑1 ;When 8A g ‑1 , the capacitance retention rate is 72%.

This invention discloses a Co-CFA-1-based butadiene polymerization catalyst and its preparation method. The butadiene polymerization catalyst comprises Co-CFA-1, a co-catalyst, and toluene solvent. The Co-CFA-1 is prepared by heating a dispersion of CFA-1 and cobalt acetate tetrahydrate in NMF at 55–65°C for 18–30 hours, followed by filtration, washing, and vacuum drying to obtain Co-CFA-1. The co-catalyst is composed of alkylaluminum and methylaluminoxane, wherein the alkylaluminum is selected from at least one of diethylaluminum chloride, triisobutylaluminum, and diethylaluminum chloride. This invention provides the application of the Co-CFA-1-based butadiene polymerization catalyst in the preparation of cis-polybutadiene, which can produce high-quality polybutadiene rubber products with high cis-structure content, controllable molecular weight, and narrow molecular weight distribution, and the product yield is high.