A method for making metal organic frameworks (MOFs) includes the step of dissolving metal salts in deionized water to form first solution, followed by adding a cyclic propyl phosphonic anhydride reagent to the first solution to form a second solution. The second solution is heated to form a reaction mixture containing MOF crystals, and is then cooled. The MOF crystals are filtered therefrom, washed and dried. To make metal organic framework-based thin film nanocomposite membranes, the MOF crystals are mixed with an m-phenylene diamine aqueous solution to form a mixture, which is then poured on a top surface of an ultrafiltration membrane substrate to form a first intermediate membrane structure. The first intermediate membrane structure is dried, and trimesolyl chloride in n-hexane solution is poured thereon to form a second intermediate membrane structure, which is cured to form an MOF-based thin film nanocomposite membrane, which is then rinsed and dried.

A negative electrode active material for a non-aqueous electrolyte secondary battery, containing negative electrode active material particles. The negative electrode active material particles include silicon compound particles each containing a silicon compound (SiO.sub.X: 0.5≤X≤1.6). The silicon compound particle contains at least one or more of amorphous silicon and microcrystalline silicon. The negative electrode active material particles each contain at least one or more of Li.sub.2SiO.sub.3 and Li.sub.2Si.sub.2O.sub.5 as a Li compound. The negative electrode active material particle contains a compound having a zeolite crystal structure, the compound adhering to a surface layer portion of the negative electrode active material particle. The negative electrode active material has high stability in an aqueous slurry, high capacity, and favorable cycle characteristics and first-time efficiency.

Disclosed are zeolitic materials that include a microporous crystalline framework substituted with one or more paired Lewis acid sites. Each of the one or more paired Lewis acid sites within the zeolitic material can comprise a first Lewis acid metal center and a second Lewis acid metal center. The first Lewis acid metal center and the second Lewis acid metal center can be separated by three or fewer atoms within the crystalline framework. Also provided herein are methods of making these zeolitic materials as well as methods of using these zeolitic materials as catalysts.

According to one or more embodiments presently disclosed, one or more reactant hydrocarbons may be dehydrogenated by a method that includes contacting the one or more reactant hydrocarbons with a catalyst system to dehydrogenate at least a portion of the reactant hydrocarbons. The catalyst system may include a zincosilicate support material that includes an MFI framework type structure incorporating at least silicon and zinc. The catalyst system may further include one or more alkali or alkaline earth metals, and one or more platinum group metals.

The present disclosure relates to catalyst systems which may be useful for the dehydrogenation of hydrocarbons. According to one or more embodiments, the catalyst systems may include a zincosilicate support material, one or more alkali or alkaline earth metals, and one or more platinum group metals. The zincosilicate support material may include an MFI framework type structure incorporating at least silicon and zinc. The present disclosure also relates to methods for the production of such catalyst systems as well as methods for the use of such catalyst systems for the dehydration of hydrocarbons.

The present disclosure relates to catalyst systems which may be useful for the dehydrogenation of hydrocarbons. According to one or more embodiments, the catalyst systems may include a zincosilicate support material, one or more alkali or alkaline earth metals, and one or more platinum group metals. The zincosilicate support material may include an MFI framework type structure incorporating at least silicon and zinc. The present disclosure also relates to methods for the production of such catalyst systems as well as methods for the use of such catalyst systems for the dehydration of hydrocarbons.

According to one or more embodiments presently disclosed, one or more reactant hydrocarbons may be dehydrogenated by a method that includes contacting the one or more reactant hydrocarbons with a catalyst system to dehydrogenate at least a portion of the reactant hydrocarbons. The catalyst system may include a zincosilicate support material that includes an MFI framework type structure incorporating at least silicon and zinc. The catalyst system may further include one or more alkali or alkaline earth metals, and one or more platinum group metals.

According to one or more embodiments presently disclosed, a catalyst system may be made by a method that includes introducing one or more alkali or alkaline earth metals to a zincosilicate support material, and introducing one or more platinum group metals to the zincosilicate support material. The zincosilicate support material may include an MFI framework type structure incorporating at least silicon and zinc.

Disclosed are zeolitic materials that include a microporous crystalline framework substituted with one or more paired Lewis acid sites. Each of the one or more paired Lewis acid sites within the zeolitic material can comprise a first Lewis acid metal center and a second Lewis acid metal center. The first Lewis acid metal center and the second Lewis acid metal center can be separated by three or fewer atoms within the crystalline framework. Also provided herein are methods of making these zeolitic materials as well as methods of using these zeolitic materials as catalysts.

This invention refers to a microporous crystalline material of zeolitic nature that has, in its calcined state and in the absence of defects in its crystalline matrix manifested by the presence of silanols, the empirical formula
x(M.sub.1/nXO.sub.2):yYO.sub.2:gGeO.sub.2:(1-g)SiO2 in which M is selected between H.sup.+, at least one inorganic cation of charge +n, and a mixture of both, X is at least one chemical element of oxidation state +3, Y is at least one chemical element with oxidation state +4 different from Si, x takes a value between 0 and 0.2, both included, y takes a value between 0 and 0.1, both included, g takes a value between 0 and 0.5, both included that has been denoted ITQ-55, a method for its preparation and its use.