A novel catalyst blend for processing of feedstocks into monoaromatics in a single stage, comprising at least one cracking catalyst, one heterogeneous transition metal catalyst, and optionally at least one hydrogenation catalyst. The process occurs in one-step or single stage with substantially no solvents or external additives, or when the feedstock contains less than 15% oxygen, the process includes additional water or steam to enable sufficient amounts of H.sub.2 being produced in-situ.

Disclosed is a method for recovering phenol and acetone from the cracking reaction product of bisphenol-A residue, by which economic feasibility and efficiency may be improved by utilizing a phenol/acetone purification process used for preparing bisphenol-A.

Disclosed is a method for recovering phenol and acetone from the cracking reaction product of bisphenol-A residue, by which economic feasibility and efficiency may be improved by utilizing a phenol/acetone purification process used for preparing bisphenol-A.

Disclosed is a method for recovering phenol and acetone from the cracking reaction product of bisphenol-A residue, by which economic feasibility and efficiency may be improved by utilizing a phenol/acetone purification process used for preparing bisphenol-A.

Provided is a method of decomposing phenol-based by-product, and more particularly, a method of decomposing phenol-based by-product including: introducing a phenol-based by-product stream, a first stream of a side discharge stream from a decomposition device, and a process water stream to a mixing device and mixing the streams; introducing a discharge stream from the mixing device to a layer separation device to phase-separate the discharge stream into an oil phase and an aqueous phase; passing an oil stream discharged from the layer separation device through any one or more of a first heat exchanger and a second heat exchanger and introducing the oil stream to the decomposition device to carry out decomposition; and supplying the first stream of the side discharge stream from the decomposition device to the mixing device, forming a mixed stream of a second stream of the side discharge stream with a lower discharge stream and discharging the mixed stream, and recovering effective components from an upper discharge stream.

Provided is a method of decomposing phenol-based by-product, and more particularly, a method of decomposing phenol-based by-product including: introducing a phenol-based by-product stream, a first stream of a side discharge stream from a decomposition device, and a process water stream to a mixing device and mixing the streams; introducing a discharge stream from the mixing device to a layer separation device to phase-separate the discharge stream into an oil phase and an aqueous phase; passing an oil stream discharged from the layer separation device through any one or more of a first heat exchanger and a second heat exchanger and introducing the oil stream to the decomposition device to carry out decomposition; and supplying the first stream of the side discharge stream from the decomposition device to the mixing device, forming a mixed stream of a second stream of the side discharge stream with a lower discharge stream and discharging the mixed stream, and recovering effective components from an upper discharge stream.

Provided is a method of decomposing phenol-based by-product, and more particularly, a method of decomposing phenol-based by-product including: introducing a phenol-based by-product stream, a first stream of a side discharge stream from a decomposition device, and a process water stream to a mixing device and mixing the streams; introducing a discharge stream from the mixing device to a layer separation device to phase-separate the discharge stream into an oil phase and an aqueous phase; passing an oil stream discharged from the layer separation device through any one or more of a first heat exchanger and a second heat exchanger and introducing the oil stream to the decomposition device to carry out decomposition; and supplying the first stream of the side discharge stream from the decomposition device to the mixing device, forming a mixed stream of a second stream of the side discharge stream with a lower discharge stream and discharging the mixed stream, and recovering effective components from an upper discharge stream.

Provided is a process for depolymerizing lignin, the process comprising exposing a liquid feed comprising lignin and a solvent to a metal-incorporated solid mesoporous silicate catalyst under conditions sufficient to depolymerize the lignin to produce one or more aromatic monomers.

Provided is a process for depolymerizing lignin, the process comprising exposing a liquid feed comprising lignin and a solvent to a metal-incorporated solid mesoporous silicate catalyst under conditions sufficient to depolymerize the lignin to produce one or more aromatic monomers.

Provided is a process for depolymerizing lignin, the process comprising exposing a liquid feed comprising lignin and a solvent to a metal-incorporated solid mesoporous silicate catalyst under conditions sufficient to depolymerize the lignin to produce one or more aromatic monomers.