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8957249 Process for removing, isolating and purifying dicarboxylic acids  
A process for removing, isolating and purifying dicarboxylic acid from fermentation broths, which includes the following steps: 1) removal of the biomass and any solids present from the...
8716522 Acetic acid production from biomass pyrolysis  
Methods are disclosed for producing, from renewable carbon sources, acetic acid in an economical manner. In particular, these methods are directed to the separation and recovery of acetic acid as...
8703451 Method for the production of free carboxylic acids  
A process for the preparation of free carboxylic acids including: A) preparation of carboxylic acid by a biological cell located in an aqueous medium with addition of an amine of formula (I) where...
8609893 Process for manufacturing acrolein and/or acrylic acid from glycerol  
The present invention relates to the manufacture of bioresourced acrolein and bioresourced acrylic acid from glycerol as starting material and more particularly comes within the scope of a process...
8203013 Preparation of fatty acids in solid form  
A method for making a fatty acid mineral salt is disclosed where liquid oils containing fatty acids are hydrolyzed using a base solution. A buffering agent is added to the hydrolyzed solution to...
7867736 Method for preparing an organic amine—lactic acid complex  
The invention relates to a method for preparing a complex of an organic amine and lactic acid in a reactor, characterized in that a water-miscible organic amine is brought into contact with...
7863480 Process for alkaline hydrolysis of carboxylic acid derivatives to carboxylic acids  
The invention relates to a process for alkaline hydrolysis of carboxylic acid derivatives, especially carboxylic esters, to carboxylic acids, wherein, for the alkaline hydrolysis of the carboxylic...
7696378 Depolymerization process  
The present invention relates to a process for decomposing a polymer into a monomer or oligomer by hydrolysis with sub- or supercritical water. The process of the present invention is...
6822117 Method for making adipic acid  
The present invention relates to a process for the manufacture of adipic acid, more particularly of adipic acid crystals. It relates more specifically to a process for the treatment of the adipic...
6673951 Process for catalytically hydrogenating phytosterols  
The present invention provides a process for catalytically hydrogenating unsaturated phytosterol compounds. The catalyst used for such hydrogenation is an alumina-supported transition metal...
6656723 Odor controlling composition and methods of making and using  
The invention relates to a composition and method for controlling odors, the composition containing an activated lignin-derived complex containing a histosol compound, and optionally containing a...
6428992 Process for the purification of 1,3-propanediol from a fermentation medium  
The present invention relates to a process for the purification of 1,3-propanediol from a fermentation medium of a 1,3-propanediol-producing microorganism, comprising 1,3-propanediol and...
6395926 Process for recovering low-boiling acids  
The invention provides a method for recovering low-boiling acids from a concentrated solution of the calcium salt of the acid by treating the concentrated solution of calcium salts of the...
6284904 Purification of organic acids using anion exchange chromatography  
Disclosed is a cost-effective method for purifying and acidifying carboxylic acids, including organic acids and amino acids. The method involves removing impurities by allowing the anionic form of...
6262313 Thermal conversion of fatty acid salts to ketones  
This invention provides a method for thermally converting volatile fatty acid (VFA) salts to ketones by mixing dry calcium salts of VFAs with hot heat transfer agent in an evacuated container,...
6254779 Treatment of effluent streams containing organic acids  
An acidic organics-containing waste water stream (12) derived from for example plant for the production of an aromatic carboxylic acid such as terephthalic acid is treated to allow recovery of...
6252109 Method for the recovery of formic acid  
The invention relates to a method for removing chemically bound formic acid from a material containing the same, in the presence of free formic acid. The method is characterized in that chemically...
6222069 Method for purifying adipic acid in water  
The invention discloses a method for purifying adipic acid in water. More precisely it discloses an improvement in adipic acid crystallization or recrystallization in water, characterised in that...
6204396 Method for producing calcium fulvate from humus material  
A method produces calcium fulvate from naturally-occurring humus material, such as leonardite, or humic shales. The humus material containing solid fulvic acid and solid humic acid is mixed with...
6180827 Recovery of acrylic acid from process or waste water streams  
Disclosed is a method for recovering acrylic acid from process or waste water streams in which the stream is vaporized and contacted with a liquid high boiling solvent for acrylic acid, thereby...
6174928 Process for producing fluorinated oligomer having COOH groups at both ends  
A fluorinated oligomer having COOH groups at both end and a ρ50° value of 1,000 to 10,000 is produced by swelling a fluorine rubber crosslinking product in an organic solvent, followed by...
6153791 Process for purifying 2-keto-L-gulonic acid  
The present invention relates to a process for the purification of 2-keto-L-gulonic acid by continuous liquid chromatography using a weakly basic ion exchange resin.
6043392 Method for conversion of biomass to chemicals and fuels  
This invention provides a method for thermally converting volatile fatty acid (VFA) salts to ketones by mixing dry calcium salts of VFAs with hot heat transfer agent in an evacuated container,...
6022992 Acid-salt metathetic process  
A cation exchange membrane mediated acid-salt metathetic process. An aqueous salt solution is placed into a first compartment on one side of the membrane together with an organic amine extractant...
5905168 Process for treating a material comprising a polymer by hydrolysis  
Process for the treatment of a material comprising a polymer, especially a polyamide. The process consists in subjecting the polyamide to hydrolysis in the presence of a hydrolyzing nitrous...
5591877 Process for the recovery of fluorinated carboxylic acids  
Fluorinated carboxylic acids can be recovered from materials which contain them by releasing, if necessary, the carboxylic acids with sufficiently strong acids, esterifying the released acids and...
5587511 Process for obtaining adipic acid  
The present invention relates to a process for obtaining adipic acid from the aqueous nitric acid mother liquors that arise during industrial adipic acid production by (i) removing nitric acid...
5471001 Crystallization of adipic acid  
Crystallization of adipic acid using low intensity ultrasonic agitation during crystallization results in purer product that is more readily handled. Apparatus for carrying out the process is also...
5288904 Method for the decomposition of trichloroacetic acid  
A process for the decomposition of trichloroacetic acid (TCAA) to form chlorides, carbonates and formates is disclosed. The process comprises treating TCAA with 6 or more equivalents of a metal...
5264624 Process for the recovery of adipic acid  
This invention relates to a process for the recovery of adipic acid from mother liquors collected during commercial production of adipic acid, wherein said mother liquors contain from 52 to 60% by...
5231225 Concurrent production of citric acid and alkali citrates  
The known liming sulfuric acid process for the recovery of crystalline citric acid from a fermentation broth is modified by subjecting the mother liquor from the crystallization to extraction with...
5202476 Purification of 2-keto-L-gulonic acid  
According to the present invention which comprises subjecting an aqueous solution of 2-keto-L-gulonic acid or its water-soluble salt containing an acid impurity, whose acidity is higher than that...
5175357 Process for recovering acetic acid from aqueous acetic acid solutions  
A process for recovering acetic acid from an aqueous acetic acid solution comprises contacting the solution with a solvent comprising a diluent component and an extractant component. The...
5145989 Recovery of acrylic acid and/or ethyl acrylate from black acid  
Black acid or the sulfuric acid residue obtained in the manufacture of ethyl acrylate by reaction of ethylene and acrylic acid in the presence of sulfuric acid is heated and distilled in the...
5024731 Method of manufacturing material for medical and pharmaceutical products from pyroligneous acid  
A method of manufacturing a material for medical and pharmaceutical products from pyroligneous acid extracted as water content in smoke generated by baking arbor and bark. Pyroligneous acid is...
4902828 Recovery of aqueous glyoxylic acid solutions  
Aqueous glyoxylic acid solutions, essentially free of other acids, are recovered from aqueous solutions which still contain other acids, by a method in which the aqueous solution is mixed with an...
4883912 Process for the recovery of acetic acid  
In a process for the recovery of acetic acid by extracting acetic acid from an aqueous acetic acid solution containing a metallic salt of sulfuric acid with an organic extractant comprising a...
4720577 Process for the extraction of carboxylic acids from dilute aqueous solutions  
The invention relates to a process for the extraction of carboxylic acids from aqueous solutions with a carboxylic acid content below 8% by weight. A mixture of an aliphatic amine with a total...
4658057 Extraction method  
In extracting a solute from an aqueous solution using a mixer-settler extractor and an organic extractant comprising a mixture of a tertiary amine and an organic diluent, the extractor is operated...
4628116 Vinyl bromide extraction of butyric acid and butanol from microbial fermentation broth  
The process of extracting butyric acid and normal butanol from microbial fermentation broth, comprising contacting an aqueous solution of a microbial fermentation broth with vinyl bromide to...
4612389 Treatment of waste stream from pentaerythritol manufacture  
This invention provides a process for improving the separation and recovery of metal formate and pentaerythritol as crystalline products, from an aqueous waste stream of a pentaerythritol...
4584057 Membrane processes for separation of organic acids from kraft black liquors  
An aliphatic organic acid fraction is separated from the kraft black liquor by subjecting the liquor to ultrafiltration, treating the resulting permeate by electrodialysis, acidifying the...
4562288 Method of operating mixer-settler  
In extracting object material from its aqueous solution by using an organic solvent, a mixer-settler extractor is employed as the extractor and operated while a solvent dispersion is maintained in...
4536584 Process for the thermochemical conversion of biomass  
A process is provided for the thermochemical conversion of biomass to useful gaseous and liquid organic products. The inventive process utilizes a catalyst to obtain increased yields of gaseous...
4444881 Recovery of organic acids from a fermentation broth  
A process is provided for the recovery of organic acids from dilute aqueous solutions. The acid in the form of its calcium salt is treated with a tertiary amine carbonate and the resulting...
4442303 Recovery of water miscible organic acids from aqueous solution as alkyl esters  
In one of its embodiments this invention provides a process for recovering C4 -C6 dicarboxylic acid components contained in a waste byproduct stream derived from a reaction system in which adipic...
4405717 Recovery of acetic acid from a fermentation broth  
A process is provided for the recovery of acetic acid from dilute aqueous solutions. The acid in the form of its calcium salt is treated with a tertiary amine carbonate and the resulting...
4401514 Method for the recovery of furfural, acetic acid and formic acid  
A method of recovering or extracting chemicals, such as furfural, formic acid, acetic acid and other organic compounds from acidic hydrolysates of plants or vegetable matter, especially spent...
4339596 Treatment of byproduct stream from adipic acid manufacture  
In one embodiment, this invention provides a process for converting a dilute aqueous filtrate byproduct stream from adipic acid manufacture into a concentrated methanolic solution which does not...
4328366 Treatment of waste stream from pentaerythritol production  
This invention provides a process for recovery of sodium formate from an aqueous waste stream which is a byproduct mother liquor derived from a reaction system in which pentaerythritol is produced...

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