The present invention relates to a process for preparing alkanesulfonic acids from dialkyl disulfides with nitric acid and oxygen.

The present invention relates to a process for preparing alkanesulfonic acids from dialkyl disulfides with nitric acid and oxygen.

The present invention relates to a process for preparing alkanesulfonic acids from dialkyl disulfides with nitric acid and oxygen.

The present invention relates to a catalyst for oxidation reactions, particularly for oxidation of mercaptan dialkyldisulfides and/or dialklypolysulfides with oxygen to alkanesulfonic acids.

The present invention relates to a catalyst for oxidation reactions, particularly for oxidation of mercaptan dialkyldisulfides and/or dialklypolysulfides with oxygen to alkanesulfonic acids.

The present invention relates to a catalyst for oxidation reactions, particularly for oxidation of mercaptan dialkyldisulfides and/or dialklypolysulfides with oxygen to alkanesulfonic acids.

Sulfur composites and polymeric materials having a high sulfur content and prepared from elemental sulfur as the primary chemical feedstock. The sulfur copolymers are prepared by the polymerization of elemental sulfur with one or more monomers of amines, thiols, sulfides, alkynylly unsaturated monomers, nitrones, aldehydes, ketones, thiiranes, ethylenically unsaturated monomers, or epoxides. The sulfur copolymers may be further dispersed with metal or ceramic composites or copolymerized with elemental carbon, photoactive organic chromophores, or reactive and solubilizing/biocompatible moieties. The sulfur composites and polymeric materials feature the ability self-healing through thermal reformation. Applications utilizing the sulfur composites and polymeric materials may include electrochemical cells, optics, H.sub.2S donors and antimicrobial materials.

The invention relates to a process for producing alkyl sulfonic acid in a reaction apparatus (41) which contains a liquid phase comprising aqueous nitric acid, wherein dialkyl disulfide is fed into the liquid phase in the reaction apparatus (41) and a crude reaction product is formed in the reaction apparatus (41) by chemical reaction of the dialkyl disulfide with the nitric acid, wherein feeding the dialkyl disulfide comprises at least one of: the liquid dialkyl disulfide is fed into the reaction apparatus (41) through an orifice (28, 29; 33) having a hydraulic diameter of less than 5 mm; the liquid dialkyl disulfide is fed into the reaction apparatus (41) with an inlet velocity of at least 0.6 m/s.

The invention relates to a process for producing alkyl sulfonic acid in a reaction apparatus (41) which contains a liquid phase comprising aqueous nitric acid, wherein dialkyl disulfide is fed into the liquid phase in the reaction apparatus (41) and a crude reaction product is formed in the reaction apparatus (41) by chemical reaction of the dialkyl disulfide with the nitric acid, wherein feeding the dialkyl disulfide comprises at least one of: the liquid dialkyl disulfide is fed into the reaction apparatus (41) through an orifice (28, 29; 33) having a hydraulic diameter of less than 5 mm; the liquid dialkyl disulfide is fed into the reaction apparatus (41) with an inlet velocity of at least 0.6 m/s.