A process for the preparation of freeze-dried 2-[(3-aminopropyl)amino]ethanethiol including the following steps: a) the reaction of a solution of amifostine with a strong acid, to obtain a solution of 2-[(3-aminopropyl)amino]ethanethiol, and b) the freeze-drying of the solution of 2-[(3-aminopropyl)amino]ethanethiol, with or without addition of excipients.

A process for the preparation of freeze-dried 2-[(3-aminopropyl)amino]ethanethiol including the following steps: a) the reaction of a solution of amifostine with a strong acid, to obtain a solution of 2-[(3-aminopropyl)amino]ethanethiol, and b) the freeze-drying of the solution of 2-[(3-aminopropyl)amino]ethanethiol, with or without addition of excipients.

A method of making CF.sub.3CH.sub.2SH, comprising a step of reacting CF.sub.3CH.sub.2X, wherein X is halide or tosylate, with MSH, where M is an alkali metal such as Na or K, to yield CF.sub.3CH.sub.2SH.

A method of making CF.sub.3CH.sub.2SH, comprising a step of reacting CF.sub.3CH.sub.2X, wherein X is halide or tosylate, with MSH, where M is an alkali metal such as Na or K, to yield CF.sub.3CH.sub.2SH.

A method of making CF.sub.3CH.sub.2SH, comprising a step of reacting CF.sub.3CH.sub.2X, wherein X is halide or tosylate, with MSH, where M is an alkali metal such as Na or K, to yield CF.sub.3CH.sub.2SH.

The present invention relates to a method for preparing methyl mercaptan, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (H.sub.2S) and optionally sulphur (S) such as to form carbon disulphide (CS.sub.2) and hydrogen (H.sub.2); b) reacting said carbon disulphide (CS.sub.2) by hydrogenation in the presence of said hydrogen (H.sub.2) obtained in step a) such as to form methyl mercaptan (CH.sub.3SH), hydrogen sulphide (H.sub.2S) and possibly hydrogen (H2); c) optionally recirculating said hydrogen sulphide (H.sub.2S) formed during step b) to step a); and d) recovering the methyl mercaptan.

The present invention relates to a method for preparing methyl mercaptan, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (H.sub.2S) and optionally sulphur (S) such as to form carbon disulphide (CS.sub.2) and hydrogen (H.sub.2); b) reacting said carbon disulphide (CS.sub.2) by hydrogenation in the presence of said hydrogen (H.sub.2) obtained in step a) such as to form methyl mercaptan (CH.sub.3SH), hydrogen sulphide (H.sub.2S) and possibly hydrogen (H2); c) optionally recirculating said hydrogen sulphide (H.sub.2S) formed during step b) to step a); and d) recovering the methyl mercaptan.

The present invention relates to a method for preparing methyl mercaptan, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (H.sub.2S) and optionally sulphur (S) such as to form carbon disulphide (CS.sub.2) and hydrogen (H.sub.2); b) reacting said carbon disulphide (CS.sub.2) by hydrogenation in the presence of said hydrogen (H.sub.2) obtained in step a) such as to form methyl mercaptan (CH.sub.3SH), hydrogen sulphide (H.sub.2S) and possibly hydrogen (H2); c) optionally recirculating said hydrogen sulphide (H.sub.2S) formed during step b) to step a); and d) recovering the methyl mercaptan.

A process comprising reacting, in a reactor having a fixed bed containing a solid catalyst which contains a zeolite, hydrogen sulfide and an oxirane in the presence of the solid catalyst to yield a reaction product with contains a mercapto-alcohol. A reactor system includes the reactor, an oxirane feed stream, a hydrogen sulfide feed stream, a fixed bed containing the solid catalyst placed inside the reactor, and an effluent stream containing the reaction product. The hydrogen sulfide and the oxirane are present in a mole ratio in a range of about 5:1 to 50:1.

A process comprising reacting, in a reactor having a fixed bed containing a solid catalyst which contains a zeolite, hydrogen sulfide and an oxirane in the presence of the solid catalyst to yield a reaction product with contains a mercapto-alcohol. A reactor system includes the reactor, an oxirane feed stream, a hydrogen sulfide feed stream, a fixed bed containing the solid catalyst placed inside the reactor, and an effluent stream containing the reaction product. The hydrogen sulfide and the oxirane are present in a mole ratio in a range of about 5:1 to 50:1.