The present disclosure provides a method for decomposing a phenolic by-product, the method including: a step S10 of feeding a phenolic by-product stream to a decomposition apparatus and thermally cracking the phenolic by-product stream; a step S20 of recovering an active ingredient from a top discharge stream of the decomposition apparatus and discharging a substance having a high boiling point through a bottom discharge stream of the decomposition apparatus; a step S30 of passing a part of the bottom discharge stream of the decomposition apparatus through a reboiler and then feeding the part of the bottom discharge stream of the decomposition apparatus to the decomposition apparatus and discharging a residual stream of the bottom discharge stream of the decomposition apparatus; and a step S40 of feeding a side discharge stream of the decomposition apparatus to the reboiler.

The present disclosure provides a method for decomposing a phenolic by-product, the method including: a step S10 of feeding a phenolic by-product stream to a decomposition apparatus and thermally cracking the phenolic by-product stream; a step S20 of recovering an active ingredient from a top discharge stream of the decomposition apparatus and discharging a substance having a high boiling point through a bottom discharge stream of the decomposition apparatus; a step S30 of passing a part of the bottom discharge stream of the decomposition apparatus through a reboiler and then feeding the part of the bottom discharge stream of the decomposition apparatus to the decomposition apparatus and discharging a residual stream of the bottom discharge stream of the decomposition apparatus; and a step S40 of feeding a side discharge stream of the decomposition apparatus to the reboiler.

Zwitterion ligand metal complexes and methods of aerobic oxidation using a zwitterion ligand metal complex are provided. The zwitterion ligand metal complexes can include a transition metal salt and a zwitterion ligand, which can comprise a non-conjugated amide anion-phosphonium cation, an amide anion-ammonium cation, or an iminium cation. The methods of aerobic oxidation can include combining the zwitterion ligand metal complex with an oxidizable compound and molecular oxygen to allow the isolation of an oxidized compound from the oxidizable compound.

Zwitterion ligand metal complexes and methods of aerobic oxidation using a zwitterion ligand metal complex are provided. The zwitterion ligand metal complexes can include a transition metal salt and a zwitterion ligand, which can comprise a non-conjugated amide anion-phosphonium cation, an amide anion-ammonium cation, or an iminium cation. The methods of aerobic oxidation can include combining the zwitterion ligand metal complex with an oxidizable compound and molecular oxygen to allow the isolation of an oxidized compound from the oxidizable compound.

The disclosure relates to a method for depolymerizing lignin. The method includes reacting a lignin compound with a thiol compound to depolymerize the lignin compound and to form a depolymerized lignin product having a reduced molecular weight relative to the lignin compound prior to reacting. The method can further include forming an oxidized thiol reaction product between two thiol groups from one or more thiol compounds, and then reducing the oxidized thiol reaction product to re-form or regenerate the thiol compound for further lignin depolymerization.

The disclosure relates to a method for depolymerizing lignin. The method includes reacting a lignin compound with a thiol compound to depolymerize the lignin compound and to form a depolymerized lignin product having a reduced molecular weight relative to the lignin compound prior to reacting. The method can further include forming an oxidized thiol reaction product between two thiol groups from one or more thiol compounds, and then reducing the oxidized thiol reaction product to re-form or regenerate the thiol compound for further lignin depolymerization.

With the object of efficiently producing an oxidation product, the present invention provides a method for producing an oxidation product by oxidizing a raw material compound in the presence of oxygen, wherein the raw material compound is oxidized in the presence of manganese dioxide having a crystal structure of β-type.

With the object of efficiently producing an oxidation product, the present invention provides a method for producing an oxidation product by oxidizing a raw material compound in the presence of oxygen, wherein the raw material compound is oxidized in the presence of manganese dioxide having a crystal structure of β-type.

A method for decomposing a phenolic by-product generated in a phenol preparation process, the method including: adding a phenolic by-product stream, a decomposition apparatus side discharge stream, and process water to a mixing apparatus and mixing the phenolic by-product stream, the decomposition apparatus side discharge stream, and the process water; adding a mixing apparatus discharge stream discharged from the mixing apparatus to a phase separation apparatus and phase-separating the mixing apparatus discharge stream into an oil phase and an aqueous phase; feeding an oil phase stream discharged from the phase-separation apparatus and discharged to a decomposition apparatus and decomposing the oil phase stream; and circulating the decomposition apparatus side discharge stream discharged from the decomposition apparatus to the mixing apparatus.

A method for decomposing a phenolic by-product generated in a phenol preparation process, the method including: adding a phenolic by-product stream, a decomposition apparatus side discharge stream, and process water to a mixing apparatus and mixing the phenolic by-product stream, the decomposition apparatus side discharge stream, and the process water; adding a mixing apparatus discharge stream discharged from the mixing apparatus to a phase separation apparatus and phase-separating the mixing apparatus discharge stream into an oil phase and an aqueous phase; feeding an oil phase stream discharged from the phase-separation apparatus and discharged to a decomposition apparatus and decomposing the oil phase stream; and circulating the decomposition apparatus side discharge stream discharged from the decomposition apparatus to the mixing apparatus.