Austin, TX, United States
Austin, TX, United States

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Patent
Sachem Inc. | Date: 2013-02-14

A process for producing a ceramic material including providing an aqueous solution comprising at least one transition metal ion and one or more further transition metal ion and/or one or more additional ion; adding to the aqueous solution a quaternary ammonium or phosphonium hydroxide comprising at least one alkyl group containing about 8 or more carbon atoms to form a combined aqueous solution; mixing the combined aqueous solution to form a gel; transferring the formed gel to a furnace; and heating the formed gel to a temperature sufficient for a time sufficient to calcine the gel to form a solid ceramic material. The process in accordance with the present invention provides an improved ceramic material, in some embodiments of which is suitable for use in the cathode material of a lithium ion battery.


Patent
SACHEM Inc. | Date: 2016-03-15

The present invention relates to structure directing agents for synthesis of crystalline materials generally known as zeolites, by use of an enhanced content of the trans isomer of a 3,5-dimethyl-N,N-dimethylpiperidinium cation together with the conventional oxides used to form zeolites.


Patent
Sachem Inc. | Date: 2015-01-13

The present invention provides a process for selectively etching molybdenum or titanium relative to a oxide semiconductor film, including providing a substrate comprising a layer of oxide semiconductor and a layer comprising molybdenum or titanium on the layer of oxide semiconductor; preparing the substrate by applying a photoresist layer over the layer comprising molybdenum or titanium, and then patterning and developing the photoresist layer to form an exposed portion of the layer comprising molybdenum or titanium; providing a composition comprising ammonia or ammonium hydroxide, a quaternary ammonium hydroxide and a peroxide; and applying the composition to the exposed portion for a time sufficient to etch and remove the exposed portion of the layer comprising molybdenum or titanium, wherein the etching selectively removes the molybdenum or titanium relative to the oxide semiconductor.


A process for recovering an onium hydroxide from a composition containing onium ions and a process residue, including providing a composition containing onium ions and a process residue; adding a quantity of a surfactant to the composition to obtain a surfactant-modified composition; providing a cation exchange media; collecting the onium ions by applying the surfactant-modified composition to the cation exchange media wherein the onium ions become bound to and retained by the cation exchange media and the process residue and the surfactant do not become bound to the cation exchange media and are substantially not retained by the cation exchange media; and recovering the onium ions from the cation exchange media as an onium hydroxide by applying a cation-containing hydroxide composition to the cation exchange media.


Patent
SACHEM Inc. | Date: 2015-07-24

A composition including (a) a quaternary ammonium hydroxide having a general formula (I): as defined herein, and (b) a dipolar aprotic solvent substantially free of water.


A process for recovering an onium hydroxide from a composition containing onium ions and a process residue, including providing a composition containing onium ions and a process residue; adding a quantity of a surfactant to the composition to obtain a surfactant-modified composition; providing a cation exchange media; collecting the onium ions by applying the surfactant-modified composition to the cation exchange media wherein the onium ions become bound to and retained by the cation exchange media and the process residue and the surfactant do not become bound to the cation exchange media and are substantially not retained by the cation exchange media; and recovering the onium ions from the cation exchange media as an onium hydroxide by applying a cation-containing hydroxide composition to the cation exchange media.


The present invention provides a process for depositing an oxide coating on an inorganic substrate, including providing an aqueous composition containing a tetraalkylammonium polyoxoanion and lithium hydroxide; contacting the aqueous composition with an inorganic substrate for a time sufficient to deposit a lithium polyoxoanion on surfaces of the inorganic substrate to form an initially coated inorganic substrate; and heating the initially coated inorganic substrate for a time sufficient to convert the lithium polyoxoanion to an oxide to form on the inorganic substrate an oxide coating derived from the polyoxoanion. The inorganic substrate may be a ceramic material or a semiconductor material, a glass or other dielectric material, and the ceramic material may be a lithium ion battery cathode material.


Patent
Sachem Inc. | Date: 2012-03-27

A method of removing a residue from a surface, including applying to the surface a composition including (a) a quaternary ammonium hydroxide having a general formula (I): as defined herein, and


A process for separating organic compounds from a mixture by reverse-phase displacement chromatography, including providing a hydrophobic stationary phase; applying to the hydrophobic stationary phase a mixture comprising organic compounds to be separated; displacing the organic compounds from the hydrophobic stationary phase by applying thereto an aqueous composition comprising a non-surface active hydrophobic neutral zwitterionic displacer molecule and optionally an organic solvent; and collecting a plurality of fractions eluted from the hydrophobic stationary phase containing the separated organic compounds; in which the non-surface active hydrophobic neutral zwitterionic displacer molecule comprises a hydrophobic zwitterion having the general formula, as defined in the disclosure: [CM-R*CM].


The present invention provides a process for depositing an oxide coating on an inorganic substrate, including providing an aqueous composition containing a tetraalkylammonium polyoxoanion and hydrogen peroxide; contacting the aqueous composition with an inorganic substrate for a time sufficient to deposit a hydroxide derived from the polyoxoanion on surfaces of the inorganic substrate to form an initially coated inorganic substrate; and heating the initially coated inorganic substrate for a time sufficient to convert the hydroxide to an oxide to form on the inorganic substrate an oxide coating derived from the polyoxoanion. The inorganic substrate may be a ceramic material or a semiconductor material, a glass or other dielectric material, and the ceramic material may be a lithium ion battery cathode material.

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