Class 554/70 - Purification or recovery

Subclass of Class 554 - Organic compounds -- part of the class 532-570 series
Definition: Processes which are directed to separating the fatty acid
No. of patents: 26
Last issue date: 12/25/2007

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Number	Title	Issue Date
7312346	Method of purifying hydroxyalkyl amide A method for purifying hydroxyalkyl amide of residual alkanolamine by using nonpolar solvent, an acidic pH, salt solutions and an elevated temperature. ...	12/25/2007
6777213	Isolation of carboxylic acids from fermentation broth A process for recovering carboxylic acids from an aqueous mixture such as a fermentation broth using a solvent containing at least one olefin without the need for first removing the spent microorganism cells is provided. A co-solvent which increases the partition co...	08/17/2004
6583095	Synthesis of bleach activators The present invention relates to an improved process for synthesizing organic compounds for use as bleach activators....	06/24/2003
6527690	Purification of phenyl ester salts The invention relates to a process for purifying and decolorizing a phenyl ester salt. The process combines a phenyl ester salt with a solvent to form a mixture and then stirs the mixture to form a slurry. The phenyl ester salt is substantially insoluble ...	03/04/2003
6500973	Extractive solution crystallization of chemical compounds A process for the purification and isolation of a chemical compound, by extractive solution crystallization. The process comprises combining in any order a first solvent, a second solvent, and a mixture comprising a chemical compound with at least one imp...	12/31/2002
6497644	Process for recycling amido-carboxylic acid esters into amino-carboxylic acids According to the invention, waste materials containing amido-carboxylic acid esters, which are generated during the preparation of phenyl ester salts, can be converted into amido-carboxylic acids. The recovered amido-carboxylic acid is then useful in the ...	12/24/2002
6498124	Isolation of phenyl ester salts from mixtures comprising sulfolane The invention relates to a process for isolating a phenyl ester salt from a mixture comprising sulfolane (tetrahydrothiophene-1,1-dioxide). The invention includes adjusting the temperature of a mixture comprising a phenyl ester salt and sulfolane to a tem...	12/24/2002
6369250	Process for preparing and/or purifying amido acid phenyl ester sulfonates The present invention relates to a process for the preparation of a purified salt of 4-sulfophenyl-[(1-oxyalkanoyl)amino]alkanoate. The process comprises the steps of: (a) providing a source of 4-sulfophenyl-[(1-oxyalkanoyl)amino]alkanoate; (b) admixing t...	04/09/2002
6107498	Process for making carboxylic amides Methods for producing carboxylic amides involves combining near-stoichiometric amounts of carboxylic acid and amine in a reaction vessel and reacting under pressures greater than atmospheric pressure. Alternatively, an excess of amine is reacted with carb...	08/22/2000
6034257	Method for separating glycerin from reaction mixtures containing glycerin and fatty acid amides, alkoxylated amides obtained therefrom and the use thereof In a process for preparing an alkoxylated amide of the formula (I) R1 --CO--NR2 --CHR3 --CHR4 --O--(CHR5 --CHR6 --O)n --H (I) (1) glycerides of t...	03/07/2000
6008390	Process for producing N-long-chain acyl acidic amino acids or salts thereof N-long-chain acyl acidic amino acids or salts thereof are prepared by condensing an acidic amino acid or a salt thereof and a C8 -C22 long-chain fatty acid chloride in an aqueous solvent with stirring at a stirring power of not less ...	12/28/1999
5962709	Process for the aftertreatment of betaines and amphoteric surfactants Process for the aftertreatment of betaine and amphoteric surfactants comprising adjusting the pH to the range of from 11 to 14 by addition of an alkali metal hydroxide, followed by a thermal aftertreatment if the surfactant contains dichloroacetic acid re...	10/05/1999
5723673	Process for preparing amides of N-alkyl polyhydroxyalkyls N-alkyl polyhydroxy alkyl amines such as N-methyl glucamine having a Gardner Color of less than 1 are reacted with sources of fatty acyl groups such as methyl esters, anhydrides, and/or fatty acids that have greater than 98% transmittance at 460 nm in org...	03/03/1998
5646318	Process for the preparation of hydroxyalkylamides A process is provided for producing a hydroxyalkylamide which comprises reacting alkyl ester and alkanolamine in the presence of a catalyst to provide a reaction mixture containing hydroxyalkylamide product and low boiling alcohol by-product, solidifying ...	07/08/1997
5571934	Process for preparing solutions of polyhydroxy-fatty acid amides having good color quality, and their use Process for preparing solutions of polyhydroxy-fatty acid amides having good color quality In the process described, at least one sulfur compound from the group of dithionous acid is added in an active amount to the crude solutions, which are in general m...	11/05/1996
5565590	Process for recycling amino-carboxylic acid waste materials into amido-carboxylic acids This invention relates to a process for recycling waste material selected from amino-carboxylic acid oligomers or polymers and amido-carboxylic acid oligomers or polymers into amido-carboxylic acids. A mixture containing water, an oligomeric or polymeric ...	10/15/1996
5523431	Method of producing an amide product mixture, an amide product mixture and the use thereof The present application relates to a method of producing an amide product mixture having a low content of secondary amines by reacting an amide product mixture having a high secondary amine content with an aliphatic alkylene oxide in the absence of an ess...	06/04/1996
5473088	Direct neutralization of N-acyl sarcosines A process for the direct neutralization of N-acyl sarcosines wherein all raw materials and products are in the liquid state up to the final crystallization of the product. The N-acyl sarcosines are neutralized in a continuous or batch mode with caustic su...	12/05/1995
5466840	Process for preparing purified alkali metal salts of 4-sulfophenyl-[(1-oxyalkanoyl)amino]alkanoate without isolation of intermediates This invention relates to a 5 step process for preparing a purified alkali metal salt of 4-sulfophenyl-[(1-oxyalkanoyl)amino]alkanoate in one reaction vessel without isolation of intermediates. The steps are as follows: A) reacting an alkali metal salt of...	11/14/1995
5434276	Process for making N-acyl taurides A process for the preparation of an N-acyl tauride comprising reacting an aliphatic or alicyclic carboxylic acid having from 6 to 22 carbon atoms with a taurine salt having the formula: HNR1 --CHR2 --CHR3 --SO3 M whe...	07/18/1995
5419815	Process for purifying fatty acid amides The present invention relates to a process for purifying fatty acid amides, which contains the following process steps: neutralization of the fatty acid by addition of an aqueous alkaline solution and subsequent distillation of the neutralized mixture....	05/30/1995
5393905	Purification of amido-carboxylic acids This invention relates to a four step process for purifying amido-carboxylic acids by liquid/liquid extraction from a reaction mixture containing an amido-carboxylic acid. The first step involves distilling impurities from a reaction mixture containing an...	02/28/1995
5386043	Non-aqueous neutralization of N-acyl sarcosines A process for the non-aqueous neutralization of N-Acyl sarcosines. N-Acyl sarcosines are neutralized with anhydrous hydroxide or with hydroxide with low water content, ideally less than 20% water, using high shear. The process eliminates numerous stages p...	01/31/1995
5371250	Process for the preparation of pure aqueous betaine solutions The process described relates to the preparation of aqueous betaine solutions by reaction of a tertiary amine with an ω-monohalocarboxylic acid, preferably monochloroacetic acid, and an alkali metal hydroxide in the presence of water, which solutions are...	12/06/1994
5298636	Process for reducing the levels of unreacted amino polyol contaminants in polyhydroxy fatty acid amide surfactants Polyhydroxy amines reacted with fatty acid esters yield polyhydroxy fatty acid amide surfactants, such as the C11 -C17 fatty N-methyl glucamides, which may be contaminated with secondary amines. Such amines are acylated by a reaction...	03/29/1994
4575434	Process for the separation of amides from nitriles A process for the removal of impurities comprising amides from a solution comprising nitriles and the impurities. A reaction mixture is formed which includes the solution, a layered mineral comprising aluminum silicates having exchangeable alkaline or alk...	03/11/1986

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Class 554/70 - Purification or recovery