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 (H.sub.2); 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 (H.sub.2); c) optionally recirculating said hydrogen sulphide (H.sub.2S) formed during step b) to step a); and d) recovering the methyl mercaptan.

Aspects of the present invention relate to systems and processes for obtaining desired mercaptans or thiophenes from a feed stream containing a mixture of mercaptans, thiophenes and other components. In one aspect of the invention, a system for separating one or more components from a feed stream of mixed mercaptans includes one or more distillation columns in connection with a feed containing mercaptans, the distillation column having a rectification section, a stripping section, and a feed side section separated from a side draw section by a dividing wall that extends from the rectification section to the stripping section. The distillation column further being in connection with a condenser and a reboiler; and a distillate stream, a side drawn stream, and a bottoms stream.

Aspects of the present invention relate to systems and processes for obtaining desired mercaptans or thiophenes from a feed stream containing a mixture of mercaptans, thiophenes and other components. In one aspect of the invention, a system for separating one or more components from a feed stream of mixed mercaptans includes one or more distillation columns in connection with a feed containing mercaptans, the distillation column having a rectification section, a stripping section, and a feed side section separated from a side draw section by a dividing wall that extends from the rectification section to the stripping section. The distillation column further being in connection with a condenser and a reboiler; and a distillate stream, a side drawn stream, and a bottoms stream.

The invention relates to a method for preparing a compound (I) or one of the salts thereof, and the uses of said method, R.sup.1OOCC(X)CHR.sup.2R.sup.3(I), wherein X is selected among O; NR, wherein R is H or a C1-C6 alkyl; and NOR wherein R is H, or a C1-C6 alkyl or an alkylaryl; R.sup.1 is H or a C1-C6 alkyl group; R.sup.2 is H, a C1-C6 alkyl, or an alkylaryl; and R.sup.3 is CH.sub.2SR.sup.4 or CH.sub.2SeR.sup.4, where R.sup.4 is H or a C1-C6 alkyl from a compound (II), or one of the salts thereof, R.sup.1OOCC(X)CHR.sup.2R.sup.5 and R.sup.5 is H or COOR.sup.6, where R.sup.6 is H or a C1-C6 alkyl, said method being carried out in the presence of a compound (III) CH.sub.2(Y)(Z). Wherein Y is H; OR.sup.7, where R.sup.7 is H, a C1-C6 alkyl or an acyl with formula COR.sup.4; SR.sup.4 or SeR.sup.4 where R.sup.4 matches the preceding definition; or 1 NR.sup.8R.sup.9, where R.sup.8 and R.sup.9, identical or different, each or together are a C1-C6 alkyl, or an alkylaryl; Z, identical or different to Y, is OR.sup.10 where R.sup.10 is H, a C1-C6 alkyl or COR.sup.4; a cyclic or acyclic N(COR.sup.4)(COR.sup.4) group; or NR.sup.11R.sup.12, where R.sup.11 and R.sup.12, identical or different, each or together are a C1-C6 alkyl or an alkylaryl; wherein Y and Z together are O; said method involving an intermediate product (IV) R.sup.1OOCC(X)CHR.sup.2CH.sub.2Z.

The invention relates to a method for preparing a compound (I) or one of the salts thereof, and the uses of said method, R.sup.1OOCC(X)CHR.sup.2R.sup.3(I), wherein X is selected among O; NR, wherein R is H or a C1-C6 alkyl; and NOR wherein R is H, or a C1-C6 alkyl or an alkylaryl; R.sup.1 is H or a C1-C6 alkyl group; R.sup.2 is H, a C1-C6 alkyl, or an alkylaryl; and R.sup.3 is CH.sub.2SR.sup.4 or CH.sub.2SeR.sup.4, where R.sup.4 is H or a C1-C6 alkyl from a compound (II), or one of the salts thereof, R.sup.1OOCC(X)CHR.sup.2R.sup.5 and R.sup.5 is H or COOR.sup.6, where R.sup.6 is H or a C1-C6 alkyl, said method being carried out in the presence of a compound (III) CH.sub.2(Y)(Z). Wherein Y is H; OR.sup.7, where R.sup.7 is H, a C1-C6 alkyl or an acyl with formula COR.sup.4; SR.sup.4 or SeR.sup.4 where R.sup.4 matches the preceding definition; or 1 NR.sup.8R.sup.9, where R.sup.8 and R.sup.9, identical or different, each or together are a C1-C6 alkyl, or an alkylaryl; Z, identical or different to Y, is OR.sup.10 where R.sup.10 is H, a C1-C6 alkyl or COR.sup.4; a cyclic or acyclic N(COR.sup.4)(COR.sup.4) group; or NR.sup.11R.sup.12, where R.sup.11 and R.sup.12, identical or different, each or together are a C1-C6 alkyl or an alkylaryl; wherein Y and Z together are O; said method involving an intermediate product (IV) R.sup.1OOCC(X)CHR.sup.2CH.sub.2Z.

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 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.