Abstract:
A process for purifying (i) a hydrophilic organic solvent, (ii) a hydrolysable organic solvent, or (iii) a mixture of a hydrophilic organic solvent and a hydrolysable organic solvent by removing ionic contaminants from the hydrophilic organic solvent, from the hydrolysable organic solvent, or from the mixture of a hydrophilic and a hydrolysable organic solvent without generation of by-product impurities, the process including the steps of contacting the hydrophilic organic solvent, the hydrolysable organic solvent, or the mixture of hydrophilic and hydrolysable organic solvents with a mixed bed of ion exchange resin; wherein the mixed bed of ion exchange resin includes a mixture of: (a) a weak-acid cationic ion exchange resin and (b) a weak-base anionic ion exchange resin.
Abstract:
It is related to a process for purifying organic amines. The process comprises (a) providing an organic amine to a first vessel(5), the organic amine having a normal boiling point at one bar; (b) filling the first vessel(5) with inert gas; (c) heating the organic amine in the first vessel(5) to a sub-boiling temperature, wherein the sub-boiling temperature is at least 15°C less than the normal boiling point; (d) cooling the vapor from the first vessel(5) in a second vessel (20) to provide a liquid; and (e) contacting the organic amine with a resin polymer matrix, wherein the resin polymer matrix is embedded with an amino compound selected from the group consisting of iminodiacetic acid, aminomethylphosphonic acid or a combination thereof.
Abstract:
The process for synthesizing a poly(amic acid) polymer or a polyimide polymer is improved by using a solvent system consisting essentially of: (A) a first component consisting essentially of at least one of a sulfoxide, e.g., DMSO, and an alkyl phosphate, e.g., triethyl phosphate, and (B) optionally, a second component consisting essentially of at least one aprotic glycol ether, e.g., dipropylene glycol dimethyl ether.
Abstract:
In the process of producing a lithium ion battery, one or more compounds of Formula 1, 2, 3 or 4 (e.g., N, N-dimethylpropionamide), is used as the solvent in the step of forming a slurry from an active material (e.g., lithium cobalt oxide), aconductive agent (e.g., carbon black), and abinder polymer (e.g., polyvinylidene fluoride).
Abstract:
Methods for the removal of ionic contaminants from a hydrophilic organic solvent by a mixed bed of ion exchange resins are described. A mixed bed of ion exchange resins with gel-type strong-acid cationic ion exchange resin with a specific moisture holding capacity and gel-type anionic ion exchange resin is used in some embodiments of such methods.
Abstract:
A processes for purifying glycol ethers, comprises (a) providing a glycol ether to a first vessel, the glycol ether, the glycol ether having the following formula: R 1-O- (CHR 2CHR 3) O) nR 4; wherein R 1 is an alkyl group having 1 to 9 carbon atoms or a phenyl group; wherein R 2 and R 3 each individually is hydrogen, a methyl group or an ethyl group, provided that when R 3 is a methyl group or an ethyl group, R 2 is hydrogen and provided that when R 2 is a methyl group or an ethyl group, R 3 is hydrogen; wherein R 4 is hydrogen, an alkyl group having 1 to 4 carbon atoms, an acetyl group, or a propionyl group; and wherein n is an integer of 1 to 3; (b) filling the first vessel with inert gas; (c) heating the glycol ether in the first vessel to a sub-boiling temperature, wherein the sub-boiling temperature is at least 15℃ less than the normal boiling point of the glycol ether; (d) cooling the vapor from the first vessel in a second vessel to provide a liquid; and (e) contacting the glycol ether with a mixed bed of ion exchange resins comprising cationic exchange resins and anionic ion exchange resins.
Abstract:
A method for purification of organic amines, comprising introducing a resin polymer matrix to a liquid containing at least an organic amine bonded to at least one metallic element, wherein the resin polymer matrix is embedded with an amino compound selected from the group consisting of iminodiacetic acid, aminomethylphosphonic acid or a combination thereof, and wherein the embedded resin polymer matrix binds the at least one metallic element, and the at least one metallic element is removed from the organic amine.
Abstract:
A solvent consisting essentially of: (A) a first component consisting of N, N-diethylacetamide (DEAC); (B) a second component consisting of 3-methoxy-N, N-dimethyl propionamide (M3DMPA); and (C) an optional third component consisting of one or more glycol ethers or glycol ether acetates; or a solvent consisting essentially of: (1) a first component consisting of one or more acyclic amides of Formula (I): and (2) an optional second component consisting of one or more of DEAC, M3DMPA, N,N-dimethylpropionamide, one or more glycol ethers or glycol ether acetates, and one or more cyclic amides of Formulae (II-IV).
Abstract:
Solvents useful for removing, among other things, photoresists and poly (amic acid) /polyimide from display/semiconductor substrates or electronic processing equipment, consist essentially of: (A) a first component consisting of a sulfoxide, e.g., DMSO; (B) a second component consisting of a glycol ether, e.g., ethylene glycol monobutyl ether; and (C) a third component consisting of at least one of N-formyl morpholine, N, N-dimethyl propionamide, 3-methoxy-N, N-dimethyl propanamide, triethyl phosphate, N, N-dimethyl acetamide; N, N-diethyl acetamide, N, N-diethyl propionamide, N-methyl acetamide, N-methyl propionamide, N-ethyl acetamide, and N-ethyl propionamide.
Abstract:
The process for synthesizing a poly(amic acid) polymer or a polyimide polymer is improved by using a solvent system consisting essentially of: (A) a first component consisting essentially of N, N-dimethyl propionamide (DMPA), and (B) optionally, a second component consisting essentially of at least one of a sulfoxide, e.g., DMSO, an alkyl phosphate, e.g., triethyl phosphate, and an aprotic glycol ether, e.g., propylene glycol methyl ether acetate.