The invention relates to a process for preparing methyl mercaptan from a mixture of carbon oxide, hydrogen sulfide and hydrogen, in the presence of a catalyst based on molybdenum and potassium supported on zirconia, said catalyst not comprising any promoter.

The invention relates to a process for preparing methyl mercaptan from a mixture of carbon oxide, hydrogen sulfide and hydrogen, in the presence of a catalyst based on molybdenum and potassium supported on zirconia, said catalyst not comprising any promoter.

The present invention relates to a new, enhanced process for the manufacture of Cysteamine Bitartrate (I) and of its key intermediate thiazolidine (II).

Furthermore, it relates to a new processes for the manufacture of crystalline anhydrous Cysteamine Bitartrate (polymorph L2) and monohydrate Cysteamine Bitartrate (polymorph L1). The crystalline anhydrous Cysteamine Bitartrate (polymorph L2) so obtained is characterized by particularly fine particle size and good appearance.

The present invention relates to a new, enhanced process for the manufacture of Cysteamine Bitartrate (I) and of its key intermediate thiazolidine (II).

Furthermore, it relates to a new processes for the manufacture of crystalline anhydrous Cysteamine Bitartrate (polymorph L2) and monohydrate Cysteamine Bitartrate (polymorph L1). The crystalline anhydrous Cysteamine Bitartrate (polymorph L2) so obtained is characterized by particularly fine particle size and good appearance.

Provided is an enzymatic process for preparing mercaptans from disulfides.

Provided is an enzymatic process for preparing mercaptans from disulfides.

Provided is an enzymatic process for preparing mercaptans from disulfides.

The present invention generally relates to the manufacture of methyl mercaptan using recycled dimethyl sulfide. In particular, the invention relates to a process for the continuous production of methyl mercaptan via the catalytic conversion of dimethyl sulfide using a non-promoted Al.sub.2O.sub.3 catalyst at low temperatures.

The present invention generally relates to the manufacture of methyl mercaptan using recycled dimethyl sulfide. In particular, the invention relates to a process for the continuous production of methyl mercaptan via the catalytic conversion of dimethyl sulfide using a non-promoted Al.sub.2O.sub.3 catalyst at low temperatures.

The present invention generally relates to the manufacture of methyl mercaptan using recycled dimethyl sulfide. In particular, the invention relates to a process for the continuous production of methyl mercaptan via the catalytic conversion of dimethyl sulfide using a non-promoted Al.sub.2O.sub.3 catalyst at low temperatures.