A method of synthesizing a disulfide compound is provided. The method may include providing an electrochemical cell that has a compartment, an anode, and a cathode. The compartment may contain a solution of one or more thiol compounds, a catalyst, and a solvent. The method may also include providing an electrical current to the electrochemical cell and converting the one or more thiol compounds into the disulfide compound.

A method of synthesizing a disulfide compound is provided. The method may include providing an electrochemical cell that has a compartment, an anode, and a cathode. The compartment may contain a solution of one or more thiol compounds, a catalyst, and a solvent. The method may also include providing an electrical current to the electrochemical cell and converting the one or more thiol compounds into the disulfide compound.

The present disclosure generally relates to methods of electrochemical coupling of thiols to form disulfide compounds. A method of synthesizing a disulfide compound is provided. The method may include providing an electrochemical cell that has a compartment, an anode, and a cathode. The compartment may contain a solution of one or more thiol compounds, a catalyst, and a solvent. The method may also include providing an electrical current to the electrochemical cell and converting the one or more thiol compounds into the disulfide compound.

The present disclosure generally relates to methods of electrochemical coupling of thiols to form disulfide compounds. A method of synthesizing a disulfide compound is provided. The method may include providing an electrochemical cell that has a compartment, an anode, and a cathode. The compartment may contain a solution of one or more thiol compounds, a catalyst, and a solvent. The method may also include providing an electrical current to the electrochemical cell and converting the one or more thiol compounds into the disulfide compound.

An composition comprising: (A) a mixture comprising at least one (thio)phosphoric acid triamide according to the general formula (I)

R.sup.1R.sup.2NP(X)(NH.sub.2).sub.2, wherein X is oxygen or sulfur; R.sup.1 is a C.sub.1 to C.sub.20 alkyl, C.sub.3 to C.sub.20 cycloalkyl, C.sub.6 to C.sub.20 aryl, or dialkylaminocarbonyl group; R.sup.2 is H, or R.sup.1 and R.sup.2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and (C) at least one amine selected from the group consisting of (C1) a polymeric polyamine, and (C2) an amine containing not more than one amino group and at least three alkoxy- or hydroxy-substituted C.sub.2 to C.sub.12 alkyl groups R.sup.21, wherein at least one of the groups R.sup.21 is different to the other groups R.sup.21, and (C3) an amine containing not more than one amino group and at least two alkoxy- or hydroxy-substituted C.sub.2 to C.sub.12 alkyl groups R.sup.22, wherein at least one of the groups R.sup.22 bears the alkoxy or hydroxy substituent at a secondary or tertiary carbon atom and wherein at least one of the groups R.sup.22 is different to the other group(s) R.sup.22, and (C4) an amine containing at least one saturated or unsaturated C.sub.8 to C.sub.40 alkyl group R.sup.23, and (C5) a saturated or unsaturated heterocyclic amine which contains at least one oxygen atom as ring atom and which does not contain a further alkoxy group.

An composition comprising: (A) a mixture comprising at least one (thio)phosphoric acid triamide according to the general formula (I)

R.sup.1R.sup.2NP(X)(NH.sub.2).sub.2, wherein X is oxygen or sulfur; R.sup.1 is a C.sub.1 to C.sub.20 alkyl, C.sub.3 to C.sub.20 cycloalkyl, C.sub.6 to C.sub.20 aryl, or dialkylaminocarbonyl group; R.sup.2 is H, or R.sup.1 and R.sup.2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and (C) at least one amine selected from the group consisting of (C1) a polymeric polyamine, and (C2) an amine containing not more than one amino group and at least three alkoxy- or hydroxy-substituted C.sub.2 to C.sub.12 alkyl groups R.sup.21, wherein at least one of the groups R.sup.21 is different to the other groups R.sup.21, and (C3) an amine containing not more than one amino group and at least two alkoxy- or hydroxy-substituted C.sub.2 to C.sub.12 alkyl groups R.sup.22, wherein at least one of the groups R.sup.22 bears the alkoxy or hydroxy substituent at a secondary or tertiary carbon atom and wherein at least one of the groups R.sup.22 is different to the other group(s) R.sup.22, and (C4) an amine containing at least one saturated or unsaturated C.sub.8 to C.sub.40 alkyl group R.sup.23, and (C5) a saturated or unsaturated heterocyclic amine which contains at least one oxygen atom as ring atom and which does not contain a further alkoxy group.

An composition comprising: (A) a mixture comprising at least one (thio)phosphoric acid triamide according to the general formula (I)
R.sup.1R.sup.2NP(X)(NH.sub.2).sub.2, wherein X is oxygen or sulfur; R.sup.1 is a C.sub.1 to C.sub.20 alkyl, C.sub.3 to C.sub.20 cycloalkyl, C.sub.6 to C.sub.20 aryl, or dialkylaminocarbonyl group; R.sup.2 is H, or R.sup.1 and R.sup.2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and (C) at least one amine selected from the group consisting of (C1) a polymeric polyamine, and (C2) an amine containing not more than one amino group and at least three alkoxy- or hydroxy-substituted C.sub.2 to C.sub.12 alkyl groups R.sup.21, wherein at least one of the groups R.sup.21 is different to the other groups R.sup.21, and (C3) an amine containing not more than one amino group and at least two alkoxy- or hydroxy-substituted C.sub.2 to C.sub.12 alkyl groups R.sup.22, wherein at least one of the groups R.sup.22 bears the alkoxy or hydroxy substituent at a secondary or tertiary carbon atom and wherein at least one of the groups R.sup.22 is different to the other group(s) R.sup.22, and (C4) an amine containing at least one saturated or unsaturated C.sub.8 to C.sub.40 alkyl group R.sup.23, and (C5) a saturated or unsaturated heterocyclic amine which contains at least one oxygen atom as ring atom and which does not contain a further alkoxy group.

An composition comprising: (A) a mixture comprising at least one (thio)phosphoric acid triamide according to the general formula (I)
R.sup.1R.sup.2NP(X)(NH.sub.2).sub.2, wherein X is oxygen or sulfur; R.sup.1 is a C.sub.1 to C.sub.20 alkyl, C.sub.3 to C.sub.20 cycloalkyl, C.sub.6 to C.sub.20 aryl, or dialkylaminocarbonyl group; R.sup.2 is H, or R.sup.1 and R.sup.2 together with the nitrogen atom linking them define a 5- or 6-membered saturated or unsaturated heterocyclic radical, which optionally comprises 1 or 2 further heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and (C) at least one amine selected from the group consisting of (C1) a polymeric polyamine, and (C2) an amine containing not more than one amino group and at least three alkoxy- or hydroxy-substituted C.sub.2 to C.sub.12 alkyl groups R.sup.21, wherein at least one of the groups R.sup.21 is different to the other groups R.sup.21, and (C3) an amine containing not more than one amino group and at least two alkoxy- or hydroxy-substituted C.sub.2 to C.sub.12 alkyl groups R.sup.22, wherein at least one of the groups R.sup.22 bears the alkoxy or hydroxy substituent at a secondary or tertiary carbon atom and wherein at least one of the groups R.sup.22 is different to the other group(s) R.sup.22, and (C4) an amine containing at least one saturated or unsaturated C.sub.8 to C.sub.40 alkyl group R.sup.23, and (C5) a saturated or unsaturated heterocyclic amine which contains at least one oxygen atom as ring atom and which does not contain a further alkoxy group.

Disclosed is an antioxidant for a thermoplastic resin that provides an excellent oxidation-preventing effect to a thermoplastic resin and that has an excellent effect of preventing a change in color caused by nitrogen oxides. Specifically, a compound represented by any of General Formulae (2) to (4), particularly a compound in which R.sup.2 in the formulae is an alkyl group having 1 to 8 carbon atoms whose terminal on an oxygen atom side is linked with COO, is used as the antioxidant for a thermoplastic resin. Details of General Formulae (2) to (4) are as described in the description.

A method is provided for inhibiting nitrosation of an aqueous amine solution used in a process of removing carbon dioxide from a flue gas. That method includes a step of adding an effective amount of an antioxidant to the aqueous amine solution being circulated between an absorber and a stripper of a carbon dioxide capture system.