42results about "Ferrosilicates" patented technology

The invention relates to: a β-type iron silicate which has a fluorine content not more than 400 ppm by weight on a dry basis and in which the crystal grains have a truncated square bipyramidal morphology in an examination with a scanning electron microscope and the whole or part of the iron is contained in the β-type framework structure, and a process for producing the iron silicate; anther β-type iron silicate, and a process for producing the iron silicate; and a nitrogen oxide removal catalyst containing the other β-type iron silicate, a process for producing the catalyst, and a method for nitrogen oxide removal with the catalyst.

The invention relates to the field of the fine chemical industry, in particular to a method for processing a cyclohexane oxidation solution. The method comprises the step that the cyclohexane oxidation solution makes contact with a catalyst, wherein the catalyst contains a silicon-containing molecular sieve, and the cyclohexane oxidation solution contains cyclohexyl hydroperoxide. A preparation method of the silicon-containing molecular sieve comprises the steps that 1, a silicon source, a group VIII metal source and a structure guide agent are hydrolyzed to obtain a hydrolyzed material; 2, the hydrolyzed material is crystallized, wherein the group VIII metal source is an iron source or a mixture of the iron source and a cobalt source, and step 1 is conducted in the presence of an organophosphorus compound and / or before step 2, crystallization is conducted after the hydrolyzed material and the organophosphorus compound are mixed. The silicon-containing molecular sieve is used for processing the cyclohexane oxidation solution, extra alkaline reagents do not need to be added, the effects of a high alcohol-ketone ratio and high alcohol-ketone selectivity can be obtained at low temperature, and the method is high in industrial application value.

The present invention provides a titanium-silicalite molecular sieve and a method for preparing the same. The method includes the steps of preparing a mixture of a titanium source, a silicon source, a transition metal source, a template agent and water; heating the mixture to form a gel mixture; heating the gel mixture in a water bath; and calcining the gel mixture after the gel mixture in the water bath to form the titanium-silicalite molecular sieve. The present invention further provides a method for preparing cyclohexanone oxime by using the titanium-silicalite molecular sieve as the catalyst which results in high conversion rate, high selectivity and high usage efficiency of hydrogen peroxide.