Abstract: An optical processing apparatus includes: a light splitting assembly, disposed on an optical path of an incident light, and configured to receive the incident light and split the incident light into at least two waveband lights, a difference between optical path lengths of the at least two waveband lights being less than a set threshold; and a light sensing assembly, disposed on optical paths of the at least two waveband lights, and configured to receive the at least two waveband lights.

Abstract: A polylactic acid triblock copolymer and a preparation method thereof are described. The polylactic acid triblock copolymer comprises an aromatic polyester oligomer block and a polylactic acid block. The polylactic acid triblock copolymer is obtained by reacting an aromatic polyester oligomer with a monomer lactide at a desired temperature. The polylactic acid block copolymer has a regular structure indicated by peak melting temperatures (Tm) corresponding to the aromatic polyester oligomer block and the polylactic acid block, respectively. Examples of the aromatic polyester oligomer block include polyethylene terephthalate, polybutylene terephthalate, and polyethylene 1,4-naphthalate. Examples of the monomer lactide include L-lactide and D-lactide.

Abstract: A method for preparing hydrorefining catalyst comprises the following steps: (1) mixing an aqueous ammonia solution with a polyamine complexing agent to form a mixed solvent; (2) adding a cobalt salt to the mixed solvent, dissolving the cobalt salt, and then adding a molybdenum salt and optional salts of other active components, and dissolving them to prepare an impregnating solution; and (3) impregnating a support with the impregnating solution, followed by aging, drying, and activating the impregnated support to form a hydrorefining catalyst. The hydrorefining catalyst prepared by this method has good activity, selectivity and stability in use.

Abstract: Disclosed are a polylactic acid block copolymer and a preparation method thereof. The polylactic acid block copolymer comprises block A and block B, and is presented as B-b-A-b-B triblock structure, wherein the block A is a cyclic aromatic polyester oligomer block, and the block B is a polylactic acid block. The polylactic acid block copolymer is obtained by ring-opening copolymerization of a cyclic aromatic polyester oligomer and a lactide. Disclosed are another polylactic acid block copolymer and a preparation method thereof. The polylactic acid block copolymer comprises block A and block B, and is presented as B-b-A-b-B triblock structure, wherein the block A is an aromatic polyester block with two hydroxyl end groups, and the block B is a polylactic acid block. The polylactic acid block copolymer is obtained by ring-opening copolymerization of an aromatic polyester with two hydroxyl end groups and a lactide.

Abstract: A method for preparing hydrorefining catalyst comprises the following steps: (1) mixing an aqueous ammonia solution with a polyamine complexing agent to form a mixed solvent; (2) adding a cobalt salt to the mixed solvent, dissolving the cobalt salt, and then adding a molybdenum salt and optional salts of other active components, and dissolving them to prepare an impregnating solution; and (3) impregnating a support with the impregnating solution, followed by aging, drying, and activating the impregnated support to form a hydrorefining catalyst. The hydrorefining catalyst prepared by this method has good activity, selectivity and stability in use.