Abstract: A continuous distillation process comprises the following steps: putting a material into a multilayer distillation tower to enable the material to sequentially undergo preheating, extrusion pricking, steam distillation, meal roasting, drying and cooling treatment, condensing essential oil-containing steam, and carrying out water separation, so as to obtain an essential oil.

Abstract: A continuous distillation process comprises the following steps: putting a material into a multilayer distillation tower to enable the material to sequentially undergo preheating, extrusion pricking, steam distillation, meal roasting, drying and cooling treatment, condensing essential oil-containing steam, and carrying out water separation, so as to obtain an essential oil.

Abstract: Disclosed a process for preparing a xanthophyll crystal, comprising: dissolving the plant extract containing a xanthophyll ester in n-hexane, then filtering the mixture; adding acetone to the filtrate, filtering and collecting a filter cake; mixing the filter cake with soybean oil and ethanol uniformly; saponifying the mixed solution with alkaline aqueous solution; then adding an acidic solution thereto until the mixed solution becomes acidic, concentrating under reduced pressure to obtain a pasty substance; adding n-hexane to the pasty saponified product, standing still and then conducting a solid-liquid separation; washing the resulting solid substance with deionized water; adding a mixed solvent to the washed solid substance, dissolving it with stirring; and then adding n-hexane thereto and standing still to recrystallize.

Abstract: Disclosed a process for preparing a xanthophyll crystal, comprising: dissolving the plant extract containing a xanthophyll ester in n-hexane, then filtering the mixture; adding acetone to the filtrate, filtering and collecting a filter cake; mixing the filter cake with soybean oil and ethanol uniformly; saponifying the mixed solution with alkaline aqueous solution; then adding an acidic solution thereto until the mixed solution becomes acidic, concentrating under reduced pressure to obtain a pasty substance; adding n-hexane to the pasty saponified product, standing still and then conducting a solid-liquid separation; washing the resulting solid substance with deionized water; adding a mixed solvent to the washed solid substance, dissolving it with stirring; and then adding n-hexane thereto and standing still to recrystallize.

Abstract: A laser including a semiconductor laser stack group, a beam compositor, a pump beam collimator, a thin-disk laser crystal, a first and a second parabolic reflectors with the same facial contour function, a corrective reflector, an output mirror, and a jet-flow impact cooling system. The thin-disk laser crystal and the output mirror form a laser resonant cavity. The first parabolic reflector, second parabolic reflector, thin-disk laser crystal, and corrective reflector form a multi-pumping focus cavity. The jet-flow impact cooling system is used for cooling the thin-disk laser crystal. The pump light produced by the semiconductor laser stack group is composited by the beam compositor, collimated by the pump light collimator, and enters the multi-pumping focus cavity. Within the multi-pumping focus cavity, the pump light is focused, collimated, and deflected to converge on the thin-disk laser crystal. The laser resonant cavity produces and outputs a laser beam.