Abstract:
The alkyl groups of dialkyl trisulfides are exchanged with the alkyl groups of mercaptans by reacting a tertiary dialkyl trisulfide with an alkyl mercaptan having a greater number of carbon atoms in its alkyl group than said trisulfide in the presence of an acidic or basic type catalyst for a time and a temperature sufficient to produce a dialkyl trisulfide having at least one transferred alkyl group from said mercaptan.
Abstract:
A process for the preparation of alkane- and arenesulfonamides in high purity and yield is provided. Ammonia or alkylamine is reacted under boiling conditions with an alkane- or arenesulfonyl halide in the absence of an added solvent. The heat of reaction is dissipated by the heat of vaporization of the ammonia or alkylamine.
Abstract:
A process is disclosed for the preparation of 3-(organothio)aldehydes by reacting a mercaptan with an α, β-unsaturated aliphatic aldehyde under actinic radiation in the absence of an oxygen-containing gas wherein the mercaptan and aldehyde are mixed in substantially equimolar amount and the reaction temperature ranges from about 2° to less than 60°C.
Abstract:
The present invention discloses the use of propanone 1,3-disulfonic acid as an esterification catalyst. This catalyst has a significantly higher reaction rate when compared to conventional esterification catalysts, such as methanesulfonic acid and sulfuric acid.
Abstract:
Linear C₄+ alkyl mercaptans of high purity are prepared by the reaction of a di-linear(C₄+) alkyl sulfide with hydrogen sulfide at elevated temperature in the presence of an alumina material selected from gamma/eta alumina or gamma/eta alumina impregnated with up to 20% w/w of titania or rhenium oxide.
Abstract:
2,4-pentanedionemonosulfonic acid is prepared by reacting chlorosulfonic acid with 2,4-pentanedione, preferably in the presence of an anhydrous solvent. The method of this invention generally yields 2,4-pentanedionemonosulfonic acid in excess of about 75 percent. The novel pentanedionesulfonic acid, 2,4-pentanedionemonosulfonic acid (acetylacetone sulfonic acid) is disclosed.
Abstract:
A process is disclosed for the preparation of unsymmetrical dialkyl trisulfides by the reaction of dialkyl trisulfides and olefins in the presence of an acidic-type catalyst whereby alkyl groups are exchanged. Novel mixtures of symmetrical and unsymmetrical dialkyl trisulfides are also disclosed.