Arkema France

Gaylord Chemical Company LLC

Bernard Monguillon

Jean-Alex Laffitte

Mélanie Vauthrin

Pierre Stachura

Georges Fremy

Paul-Guillaume Schmitt

Didier Juhue

Vijay R Srinivas

Paul Guillaume Schmitt

Pascal Saint-Louis-Augustin

Kuan Huwa Tan

Lionel Renaud

Denis Siguret

Pierre Mekarbane

Louis Corbel

Pierre-Thomas Skowron

Provided is a process for preparing polythiols by preparing a sulfhydration reaction medium, simultaneously carrying out radical sulfhydration reaction of at least one polyene and acid-catalyzed sulfhydration reaction of the polyene and recovering a mixture including at least two polythiols. Also provided is a mixture of polythiols obtained from the process described herein.

Method for preparing polythiols

The present invention relates to a composition of at least one sulfonic acid in combination with an effective amount of at least one nitrosyl compound, acting as inhibitor of corrosion of metals by said at least one sulfonic acid.

Inhibitors of metal corrosion

The invention relates to a composition comprising: The invention also relates to the use of the composition as a fatty acid esterification catalyst.

Acid composition for processing fatty acids

The subject of the present invention is a process for producing a sulfonic acid which is sparingly corrosive, or even non-corrosive, with respect to stainless steels, said process comprising at least the steps of adding at least one nitrite to a sulfonic acid, curing, with stirring, with sparging of the mixture and recovering the low-corrosion sulfonic acid obtained. The invention also relates to the low-corrosion sulfonic acid obtained according to the process of the invention, and also to the use thereof as low-corrosion sulfonic acid.

Process for producing sulfonic acid

The subject of the present invention is a weakly corrosive and weakly coloured sulfonic acid, with an APHA colour index of less than 20, comprising chlorides and nitrites in a chloride/sulfonic acid molar ratio of between 1 ppm and 200 ppm, and a nitrite/sulfonic acid molar ratio of between 200 ppm and 6000 ppm, limits inclusive.

Weakly coloured sulfonic acid

The present invention relates to the acidic cleaning in the beer industry, and more particularly an improved process for acidic cleaning of the various elements and vessels that are used in the preparation of beer and other and other related fermented beverages, said cleaning being carried out by using a formulation comprising at least one alkane sulphonic acid.

Process for acidic cleaning in the beer industry

The invention relates to a composition comprising: The invention also relates to the use of composition in a fatty acid esterification method.

The present invention concerns a method for preparing 1,3,5-trioxane by trimerization of formaldehyde in the presence of methanesulfonic acid. The invention also concerns the use of at least one catalyst comprising methanesulfonic acid for the trimerization of formaldehyde into 1,3,5-trioxane.

Method for preparing trioxane

The present disclosure relates to a dimethyl sulfoxide composition suitable for cleaning polymer residue found on the devices used for processing plastic materials, in particular polyurethane.

Polymer-cleaning composition

The invention relates to solvent compositions predominantly comprising at least one oxide of an organic sulfide, more particularly dimethyl sulfoxide, to which is added at least one odour-masking agent comprising at least one compound selected from monoesters, diesters or triesters, alcohols, ketones, aldehydes and terpenes.

Solvent composition based on an oxide of an organic sulfide with masked odour

The present invention relates to the use of at least one sulfonic acid for recovering glycerol resulting from a reaction crude from transesterification of glycerides, in particular of triglycerides of vegetable and/or animal origin. The invention also relates to a process for purifying glycerol obtained as a by-product of triglyceride transesterification during the preparation of fatty acids, fatty esters and/or fatty acid salts, and also to a combined process for preparing, on the one hand, fatty acids, fatty esters and/or fatty acid salts and, on the other hand, glycerol, from triglycerides, using at least one sulfonic acid.

Use of sulfonic acid for recovering glycerol resulting from the triglyceride transesterification reaction

The present invention relates to the use of at least one alkane sulphonic acid, with formula R&#x2014;SOH, where R represents a saturated, linear or branched hydrocarbon chain, comprising 1 to 4 atoms of carbon for removing rust from all types of surface, in particular from metal surfaces, specifically iron, steel and others. The invention also relates to a method for cleaning rust from all types of surfaces using at least one alkane sulphonic acid.

Use of alkane sulphonic acid for rust removal

The present invention relates to the acidic cleaning in the beer industry, and more particularly an improved process for acidic cleaning of the various elements and vessels that are used in the preparation of beer and other related fermented beverages, said cleaning being carried out by using a formulation comprising at least one alkane sulphonic acid.

The present invention relates to the use of at least one alkanesulfonic acid of formula R&#x2014;SOH, in which R represents a saturated, linear or branched, hydrocarbon chain containing 1 to 4 carbon atoms, as agent for cleaning cement, mortar, concrete, lime, laitance and other derived products. The invention also relates to a method of cleaning cement, mortar, concrete, lime, laitance and other derived products using at least one alkanesulfonic acid.

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Mourenx, France

Bernard Monguillon