A method for isolating curcuminoids from turmeric rhizome includes the steps of a) subjecting the turmeric rhizome to extraction with a first ethanol solution having an ethanol concentration ranging from 90% to 100% at a stirring speed ranging from 100 rpm to 300 rpm so as to obtain an ethanol-extracted product; and b) subjecting the ethanol-extracted product to crystallization with a second ethanol solution having an ethanol concentration ranging from 90% to 100 at a temperature ranging from 2° C. to 8° C. and a stirring speed ranging from 40 rpm to 300 rpm so as to obtain the curcuminoids.

A method for isolating curcuminoids from turmeric rhizome includes the steps of a) subjecting the turmeric rhizome to extraction with a first ethanol solution having an ethanol concentration ranging from 90% to 100% at a stirring speed ranging from 100 rpm to 300 rpm so as to obtain an ethanol-extracted product; and b) subjecting the ethanol-extracted product to crystallization with a second ethanol solution having an ethanol concentration ranging from 90% to 100 at a temperature ranging from 2° C. to 8° C. and a stirring speed ranging from 40 rpm to 300 rpm so as to obtain the curcuminoids.

Provided is a method of decomposing phenolic by-products, and more particularly, a method of decomposing phenolic by-products including: supplying a phenolic by-product stream to a decomposition device to perform thermal decomposition; separating an upper discharge stream including effective components and a lower discharge stream including materials having a high boiling point in the decomposition device; supplying the lower discharge stream from the decomposition device, a side discharge stream from the decomposition device, and a process water stream to a mixing device and mixing these streams; and supplying a discharge stream from the mixing device to a layer separation device to separate the discharge stream from the mixing device into an oil phase and an aqueous phase.

Provided is a method of decomposing phenolic by-products, and more particularly, a method of decomposing phenolic by-products including: supplying a phenolic by-product stream to a decomposition device to perform thermal decomposition; separating an upper discharge stream including effective components and a lower discharge stream including materials having a high boiling point in the decomposition device; supplying the lower discharge stream from the decomposition device, a side discharge stream from the decomposition device, and a process water stream to a mixing device and mixing these streams; and supplying a discharge stream from the mixing device to a layer separation device to separate the discharge stream from the mixing device into an oil phase and an aqueous phase.

2,2′,4,4′-Tetrahydroxy-3-(2″-hydroxy-3″-methylbutyl-3″-alkenyl)chalcone includes the following steps: subjecting a Morus alba leaf to extraction with an aqueous solution of methanol or ethanol having a volume fraction of 40%-100%, concentrating an extract to remove methanol or ethanol and dissolving in water, subjecting to extraction with petroleum ether and ethyl acetate successively, and concentrating an ethyl acetate extract to obtain a paste; chromatographing the paste over a silica gel column using chloroform-methanol, collecting an eluate where the volume ratio of chloroform-methanol is 95/5; chromatographing the eluate over a reversed-phase column using methanol-water, collecting an eluate where the volume ratio of methanol-water is 60/40, and thereby the compound is obtained.

2,2′,4,4′-Tetrahydroxy-3-(2″-hydroxy-3″-methylbutyl-3″-alkenyl)chalcone includes the following steps: subjecting a Morus alba leaf to extraction with an aqueous solution of methanol or ethanol having a volume fraction of 40%-100%, concentrating an extract to remove methanol or ethanol and dissolving in water, subjecting to extraction with petroleum ether and ethyl acetate successively, and concentrating an ethyl acetate extract to obtain a paste; chromatographing the paste over a silica gel column using chloroform-methanol, collecting an eluate where the volume ratio of chloroform-methanol is 95/5; chromatographing the eluate over a reversed-phase column using methanol-water, collecting an eluate where the volume ratio of methanol-water is 60/40, and thereby the compound is obtained.

2,2′,4,4′-Tetrahydroxy-3-(2″-hydroxy-3″-methylbutyl-3″-alkenyl)chalcone includes the following steps: subjecting a Morus alba leaf to extraction with an aqueous solution of methanol or ethanol having a volume fraction of 40%-100%, concentrating an extract to remove methanol or ethanol and dissolving in water, subjecting to extraction with petroleum ether and ethyl acetate successively, and concentrating an ethyl acetate extract to obtain a paste; chromatographing the paste over a silica gel column using chloroform-methanol, collecting an eluate where the volume ratio of chloroform-methanol is 95/5; chromatographing the eluate over a reversed-phase column using methanol-water, collecting an eluate where the volume ratio of methanol-water is 60/40, and thereby the compound is obtained.

A method of reducing the salt content of a neutralized aralkyl hydroperoxide cleavage mass stream comprising passing the neutralized stream into a vessel, the vessel having an inlet, two outlets, an aqueous layer and a hydrocarbon layer wherein the neutralized stream enters the vessel through a first inlet and a hydrocarbon stream exits the vessel through a first outlet that is in fluid communication with the hydrocarbon layer.

A method of reducing the salt content of a neutralized aralkyl hydroperoxide cleavage mass stream comprising passing the neutralized stream into a vessel, the vessel having an inlet, two outlets, an aqueous layer and a hydrocarbon layer wherein the neutralized stream enters the vessel through a first inlet and a hydrocarbon stream exits the vessel through a first outlet that is in fluid communication with the hydrocarbon layer.

A method of reducing the salt content of a neutralized aralkyl hydroperoxide cleavage mass stream comprising passing the neutralized stream into a vessel, the vessel having an inlet, two outlets, an aqueous layer and a hydrocarbon layer wherein the neutralized stream enters the vessel through a first inlet and a hydrocarbon stream exits the vessel through a first outlet that is in fluid communication with the hydrocarbon layer.