The present invention discloses processes for producing a thiol compound or a sulfide compound from an olefin compound. Diphenylamine or a phenol compound can be used to increase the rate of conversion of the olefin compound to the thiol compound or the sulfide compound.

A process for the preparation of methionine a-hydroxy analogue and derivatives thereof comprising contacting one or more sugars or derivatives thereof with a metallo-silicate composition in the presence of a compound comprising sulphur and a solvent.

A process for the preparation of methionine a-hydroxy analogue and derivatives thereof comprising contacting one or more sugars or derivatives thereof with a metallo-silicate composition in the presence of a compound comprising sulphur and a solvent.

A process includes forming a bio-derived crosslinking material from biorenewable aconitic acid. The process includes initiating a chemical reaction to form a bio-derived crosslinking material that includes multiple functional groups. The chemical reaction includes converting each carboxylic acid group of a biorenewable aconitic acid molecule to one of the multiple functional groups.

A process includes forming a bio-derived crosslinking material from biorenewable aconitic acid. The process includes initiating a chemical reaction to form a bio-derived crosslinking material that includes multiple functional groups. The chemical reaction includes converting each carboxylic acid group of a biorenewable aconitic acid molecule to one of the multiple functional groups.

A process includes forming a bio-derived crosslinking material from biorenewable aconitic acid. The process includes initiating a chemical reaction to form a bio-derived crosslinking material that includes multiple functional groups. The chemical reaction includes converting each carboxylic acid group of a biorenewable aconitic acid molecule to one of the multiple functional groups.

A process includes forming a bio-derived crosslinking material from biorenewable aconitic acid. The process includes initiating a chemical reaction to form a bio-derived crosslinking material that includes multiple functional groups. The chemical reaction includes converting each carboxylic acid group of a biorenewable aconitic acid molecule to one of the multiple functional groups.

The present invention relates to a process for preparing at least one mercaptan, comprising the following steps: A) H.sub.2S and at least one alcohol are introduced into a first reactor; B) the H.sub.2S and said at least one alcohol are reacted to obtain an outlet stream comprising at least one mercaptan, at least one dialkyl sulfide and at least one dialkyl disulfide (DADS) and possibly unreacted H.sub.2S; C) said outlet stream obtained from step B) is separated into: a stream F1 comprising the mercaptan(s), a stream F2 comprising the dialkyl sulfide(s) and the DADS(s), and optionally a stream F3 comprising H.sub.2S; D) a purification step is performed on stream F2 in order to separate: a stream F2 comprising the dialkyl sulfide(s); and the DADS(s); E) stream F2 is introduced with H.sub.2S into a second reactor; F) a sulfhydrolysis reaction of the dialkyl sulfide(s) with H.sub.2S is performed to obtain an outlet stream F4 comprising said mercaptan(s), and possibly unreacted H.sub.2S; G) optionally, stream F4 obtained from step F) is recycled into step A).

The present invention relates to a process for preparing at least one mercaptan, comprising the following steps: A) H.sub.2S and at least one alcohol are introduced into a first reactor; B) the H.sub.2S and said at least one alcohol are reacted to obtain an outlet stream comprising at least one mercaptan, at least one dialkyl sulfide and at least one dialkyl disulfide (DADS) and possibly unreacted H.sub.2S; C) said outlet stream obtained from step B) is separated into: a stream F1 comprising the mercaptan(s), a stream F2 comprising the dialkyl sulfide(s) and the DADS(s), and optionally a stream F3 comprising H.sub.2S; D) a purification step is performed on stream F2 in order to separate: a stream F2 comprising the dialkyl sulfide(s); and the DADS(s); E) stream F2 is introduced with H.sub.2S into a second reactor; F) a sulfhydrolysis reaction of the dialkyl sulfide(s) with H.sub.2S is performed to obtain an outlet stream F4 comprising said mercaptan(s), and possibly unreacted H.sub.2S; G) optionally, stream F4 obtained from step F) is recycled into step A).

A composition comprising polysulfides, wherein at least about 50 wt. % of the polysulfides are branched C.sub.20 to C.sub.60 polysulfides represented by general formula R.sup.15S.sup.1[S].sub.nS.sup.2R.sup.16 wherein R.sup.15 and R.sup.16 are each independently a branched C.sub.10 to C.sub.30 alkyl group and wherein n is an integer from 1 to 10. A process of producing a polysulfides crude product comprising one or more branched C.sub.20 to C.sub.60 polysulfides comprising: (A) reacting a feedstock comprising one or more branched C.sub.10 to C.sub.30 mercaptans and sulfur in the presence of a catalyst and (B) collecting the polysulfides crude product.