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7297813 Removal of alkyl alkanesulfonate esters from alkanesulfonic acids and other organic media  
Methods of removing alkyl alkanesulfonate esters from aqueous or anhydrous compositions are provided. The invention provides methods for the conversion of alkyl alkanesulfonate esters of the...
6887442 Process for the drying of a hydrocarbon stream  
The invention concerns a process for the continuous drying of a hydrocarbon stream and comprises contacting the hydrocarbon stream with an ionic, liquid drying agent of a salt of a fluorinated...
6864388 Process for preparing salts of methallylsulfonic acid  
A process for preparing salts of methallylsulfonic acid in which the reaction mixture produced from the sulfonation is diluted with water and neutralized with a base.
6337421 Purification of alkanesulphonic acids  
In order to reduce the content of sulphuric acid in an alkanesulphonic acid, an aqueous solution of the latter is brought into contact with a basic anion-exchange resin. The invention relates more...
6187169 Generation of organosulfonic acid from its salts  
A procedure for the generation of organosulfonic acids from solutions of corresponding metal organosulfonate compounds by electrowinning, electrolytically driven hydrolysis or chemically driven...
6156207 Process for the removal of metal compounds from an aqueous acid solution  
Process for the selective removal of metallic ion and/or ion ammonium impurities from water soluble acid compound comprising the steps of preparing an aqueous solution of the acid compound...
6121486 Recovery of sulphonic acid esters from a hydrocarbon stream  
A method for hydrolysis of a sulphonic acid ester in a hydrocarbon substrate by aqueous extraction of the hydrocarbon substrate, comprising steps of contacting the hydrocarbon substrate with an...
5873981 Recovery of anhydrous acids  
A is a process for removing water from an alkanesulfonic acid such as methanesulfonic acid or ethanesulfonic acid by mixing an azeotropic excess of a phenolic compound with water and the...
5731459 Process for separating amino acids and aminosulponic acids through adsorption on zeolites  
The invention relates to a process for removing amino acids and/or aminosulphonic acids from preferably aqueous solutions which contain these as impurities by adsorbing the amino acids on zeolites....
5583253 Method of preparing purified alkanesulfonic acid  
A process of preparing purified alkanesulfonic acid from crude aqueous alkanesulfonic acid containing oxidizable impurities wherein the crude material is treated with a sufficient amount of...
5498754 Process for refining crude fluoroalkylsulfonic acid with the use of water  
A process for refining a crude fluoroalkylsulfonic acid represented by the general formula RfSO3 H wherein Rf is a fluoroalkyl group having 1 to 4 carbon atoms into a highly refined one...
5449819 Process for removing waste pox, alendronate and its by products  
Disclosed is a process for removing by-product phosphorus-containing (POx) materials, alendronate and alendronate byproducts from crude mother liquors in an omega amino-1-hydroxy-C2 -C6...
5395486 Dehydration process  
Dehydrated compositions are obtained by: combining a hydrous composition, e.g., a hydrous electrolyte salt, with inert fluorochemical liquid; heating the resulting mixture in a vessel to volatilize...
5312974 Process for the production of light-colored lower alkane-sulfonic acids, more particularly methanesulfonic acid  
The description is of a process for the production of light-colored lower alkane sulfonic acids, especially methane sulphonic acid, by reacting the corresponding alkyl halide with alkaline halides...
5248812 Process for the isolation of 2-naphthylamine-1,5-disulphonic acid  
When 2-naphthylamine-1,5-disulphonic acid is precipitated from the as-sulphonated reaction mixtures by dilution, a purer product is obtained, with a low level of adherent sulphuric acid, if the...
5171448 Process for purifying paraffin sulphonic acids  
A process for separating and recovering paraffin sulphonic acids from mixtures with water and sulphuric acid is described, consisting of: bringing such a mixture into contact under extraction...
5107019 Process for preparing paraffin-sulfonic acids  
The invention is concerned with an improved process for preparing paraffin-sulfonic acids containing from 10 to 20 carbon atoms, as well as their salts. The process comprises the initial reaction...
5095132 Use of surfactants in phenol sulfonate dehydration  
A process for dehydrating phenol sulfonate salts by azeotropic distillation of water wherein a surfactant such as sodium dodecylbenzene sulfonate is used to prevent the salts from agglomerating and...
5055610 Process for the separation of sulphuric acid from aqueous mixtures thereof with paraffin-sulphonic acids  
The mixture from which sulphuric acid must be separated according to the present invention are those which derive from the sulphoxidation of (C12 -C8)-n-paraffins with SO2 and O2 in the presence of...
5047580 Process for the separation of sulfuric acid from aqueous mixtures of paraffin-sulfonic acids  
The purpose of the process of the present invention is to remove excess sulfuric acid from a mixture of paraffin-sulfonic acids free or substantially free, from paraffins.In order to remove said...
5028736 Process for the separation and recovery of naphthalene-sulfonic acids from aqueous solutions  
The invention relates to a process for the separation and recovery of naphthalenesulfonic acids from aqueous solutions. In this, the naphthalenesulfonic acids are adsorbed on basic ion exchangers...
4938846 Preparation of anhydrous alkanesulfonic acid  
A process for the removal of water from a lower alkanesulfonic acid-water mixture by causing the mixture to run down the internal walls of two vertical evaporator columns operated in series, is...
4927962 Process of preparing fluorocarbon carboxylic or sulfonic acid from its fluoride  
A fluorocarbon carboxylic acid Rf(COOH)m (Rf is C1 -C10 perfluoroalkyl group, m is 1 or 2) is prepared by the steps of hydrolyzing Rf(COF)m with water to obtain an acidic solution, neutralizing the...
4925975 Method of preparing alkali metal fluoroalkylsulfonates of high purity  
In preparing a fluoroalkylsulfonate RfSO3 M, where Rf is a perfluoroalkyl gruop having not more than 6 carbon atoms and M is an alkali metal, by neutralization reaction between a...
4910335 Decolorization of alkanesulfonic and arenesulfonic acids  
A method for decolorizing color contaminated alkanesulfonic or arenesulfonic acids represented by Formula I: RSO3 H Icomprises mixing the color contaminated acid with an effective amount of a...
4895977 Purification of alkanesulfonic acids using ozone  
The removal of oxidizable organic impurities which include alkylthiolsulfonate from alkanesulfonic acids by treatment with an ozone containing gas is disclosed. The treated products have improved...
4843184 Process for extracting paraffins from their mixtures with paraffinsulfonic acids  
Mixtures of C12 -C18 n-paraffins with paraffinsulfonic acids having the same number of carbon atoms, water and sulfuric acid, and obtained by sulfoxidation of said paraffins with sulfur dioxide and...
4827078 Process for extracting paraffins from their mixtures with alkanesulfonic acids  
In preparing alkanesolfonic acids by sulfoxidation of n-paraffins containing between 12 and 18 carbon atoms, using ultraviolet radiation to initiate the reaction (light-water process), a mixture is...
4808343 Process for isolating paraffinsulfonates with a low alkali metal sulfate content and sulfuric acid from paraffin-sulfoxidation reaction mixtures without obligatory production of sodium sulfate  
A process for isolating alkanesulfonates having a low alkali metal sulfate content and sulfuric acid from paraffin-sulfoxidation reaction mixtures with the aid of alcohols, the reaction mixture,...
4798915 Process for the extraction of paraffins from mixtures thereof with alkane-sulfonic acids  
The invention relates to a process for the extraction of paraffins from mixtures obtained by the sulfoxidation of paraffins having a number of carbon atoms within the range of 12 to 18, which is...
4778945 Process for removing paraffins from their mixtures with paraffinsulphonic acids  
Mixtures of C12 -C18 n-paraffins with paraffinsulphonic acids having the same number of carbon atoms, water and sulphuric acid, and obtained by sulphoxidation of said paraffins with SO2 and O2 in...
4747972 Sulfonic acid compositions having reduced sulfur-containing contaminants  
Processes of reducing the inorganic sulfur-containing acid and the low equivalent weight organic sulfonic acid content of an acid mass comprising organic sulfonic components and inorganic...
4686097 Process for the removal of the residual sulfuric acid from the reaction mixture produced in the sulfoxidation of paraffins  
Process for the removal of the residual sulfuric acid from the reaction mixture which has been obtained in the reaction of paraffin with sulfur dioxide, oxygen and water under irradiation by UV...
4680147 Process for the isolation under mild conditions of paraffinsulfonate and sulfuric acid from reaction mixtures from paraffin sulfoxidation  
A process for the isolation under mild conditions of paraffinsulfonate from the aqueous reaction mixtures which result from the sulfoxidation of n-paraffins, from which sulfur dioxide has been...
4677074 Process for reducing sulfur-containing contaminants in sulfonated hydrocarbons  
Processes of reducing the inorganic sulfur-containing acid and the low equivalent weight organic sulfonic acid content of an acid mass comprising organic sulfonic components and inorganic...
4652343 Process for the separation of mixtures of paraffin or respectively paraffins of 6-14 carbon atoms and alcohol or respectively alcohols of 4-8  
The separation of homozeotropic mixtures of a paraffin or paraffins of 6-14 carbon atoms and an alcohol or alcohols of 4-8 carbon atoms is conducted in two rectification steps. In a first step,...
4579690 Process for the deoiling of olefin sulfonates  
An improved process for the solvent extraction of free oil from C8 to C24 olefin sulfonation products, which comprises steps for contacting an olefin sulfonation product containing free oil with an...
4557873 Process for isolating paraffinsulfonates and sulfuric acid of low alkali metal sulfate content from parafinsulfoxidation reaction mixtures  
Process for isolating paraffinsulfonates and sulfuric acid of low alkali metal sulfate content from paraffinsulfoxidation reaction mixtures with the aid of alcohols, which comprises adding a C4 -C8...
4518537 Process for isolating paraffinsulfonate from the reaction mixture obtained on sulfoxidating paraffins  
Process for isolating paraffinsulfonate from the extracts obtained on sulfoxidating n-paraffins by first of all separating off the bulk of the paraffin by adding alcohol at about 5°-55° C., then a...
4517113 Process for removal of unreacted oil from surfactant slurry  
A process for effectively removing unreacted oil from a surfactant slurry containing the same comprising: continuously feeding steam from one side of a pressure vessel into an anionic surfactant...
4454075 Process for removing sulfuric acid from the reaction mixture obtained in the sulfoxidation of paraffins  
A process for removing sulfuric acid from the reaction mixture obtained in the sulfoxidation of paraffins, which comprises adding an organic amine sulfate to the reaction mixture and removing the...
4450047 Process for recovering anhydrous alkanesulfonic acids by reduced pressure, falling film evaporation  
Water is removed from methanesulfonic acid to produce an anhydrous product of high purity by spraying wet methanesulfonic acid (MSA) onto the walls of a vertical, heated tube which is maintained at...
4310473 Process for separating sulfuric acid from sulfoxidation output  
The process for separating sulfuric acid from the sulfoxidation output obtained when paraffins are reacted with sulfuric acid, oxygen and water in the presence of ultraviolet light, using an...
4288389 Process for separating sulfonic acids from the reaction products obtained when parafins are reacted with sulfur dioxide, oxygen and water in the presence of ultra-violet light  
A process for separating sulfonic acids from the reaction product obtained by reacting paraffins with sulfuric acids, oxygen and water in the presence of ultra-violet light where an alcohol is used...
4277351 Method for improving sulfonate surfactants used in enhanced recovery processing in subterranean oil-bearing formations  
A method is disclosed for reducing formation plugging impurities in a sulfonate surfactant used in enhanced oil recovery operations which comprises contacting said surfactant with an effective...
4248793 Process for the production of internal olefin sulfonate  
Process for the production of light-colored internal olefin sulfonates substantially free from unreacted olefins comprises sulfonating an internal olefin with gaseous SO3 to produce a sulfonation...
4233236 Separation of sulphonic acids from the medium in which they are prepared  
A process for the separation of sulphonated paraffins from their sulphonation medium, which comprises neutralization of the sulphuric acid present and separation into two phases, the lower phase...
4197255 Method for the production of bleached, low-sultone olefin sulfonates  
Aqueous solutions of alkali metal C8-22 α-olefin sulfonates of light color and of low sultone content are prepared rapidly and at moderate temperatures by: (a) reacting a C8-22 α-olefin with g...
4185034 Bleaching olefin sulfonates with phosphate and peroxide  
A method of bleaching olefin sulfonates, which comprises adding more than 0.1% by weight of hydrogen peroxide, with more than 0.1% by weight of phosphate alone or silicate alone or a mixture of the...
4178307 Process for preparing sulphonic acids and sulphonates  
A process for separating sulphonic acids from a paraffin sulphonic acid solution containing in addition to the paraffin sulphonic acids, sulphonic acid, water and optionally non-sulphonated...
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