A method for separating polybutene, the method including: (1) introducing a polybutene solution into a distillation column, the solution including polybutene, a halogenated hydrocarbon solvent, and a non-polar hydrocarbon solvent and having a viscosity of 1 cp to 50 cp measured at 25° C. using a rotational viscometer; (2) collecting an upper stream including the halogenated hydrocarbon solvent and a portion of the non-polar hydrocarbon solvent from an upper portion of the distillation column, and collecting a lower stream including the polybutene and a remaining portion of the non-polar hydrocarbon solvent from a lower portion of the distillation column, where the lower stream has a viscosity of 10 cp to 150 cp; and (3) separating the remaining portion of the non-polar hydrocarbon solvent and the polybutene from the lower stream.

A method for separating polybutene, the method including: (1) introducing a polybutene solution into a distillation column, the solution including polybutene, a halogenated hydrocarbon solvent, and a non-polar hydrocarbon solvent and having a viscosity of 1 cp to 50 cp measured at 25° C. using a rotational viscometer; (2) collecting an upper stream including the halogenated hydrocarbon solvent and a portion of the non-polar hydrocarbon solvent from an upper portion of the distillation column, and collecting a lower stream including the polybutene and a remaining portion of the non-polar hydrocarbon solvent from a lower portion of the distillation column, where the lower stream has a viscosity of 10 cp to 150 cp; and (3) separating the remaining portion of the non-polar hydrocarbon solvent and the polybutene from the lower stream.

Provided is a method of preparing a polymer including: supplying a monomer stream and a solvent stream to a reactor and performing a polymerization reaction to prepare a reaction product; supplying a reactor discharge stream to a volatilization device, separating a polymer from a lower portion of the volatilization device, splitting an upper discharge stream including an unreacted monomer, a solvent, and an inert gas into two or more streams, and divisionally supplying the split streams to a plurality of condensers, respectively; condensing and separating the unreacted monomer and the solvent in each of the condensers and supplying a gaseous stream therefrom to a condenser installed at a rear end of each condenser; and supplying a gaseous stream discharged from a condenser installed at the rearmost end to a vacuum unit.

Provided is a method of preparing a polymer including: supplying a monomer stream and a solvent stream to a reactor and performing a polymerization reaction to prepare a reaction product; supplying a reactor discharge stream to a volatilization device, separating a polymer from a lower portion of the volatilization device, splitting an upper discharge stream including an unreacted monomer, a solvent, and an inert gas into two or more streams, and divisionally supplying the split streams to a plurality of condensers, respectively; condensing and separating the unreacted monomer and the solvent in each of the condensers and supplying a gaseous stream therefrom to a condenser installed at a rear end of each condenser; and supplying a gaseous stream discharged from a condenser installed at the rearmost end to a vacuum unit.

Provided is a method for recycling a battery electrode by immersing the electrode into a delamination solution and subsequently precipitating a polymeric binder with the addition of a precipitation agent; wherein the electrode comprises a current collector and an electrode layer material coated on one side or both sides of the current collector; wherein the electrode layer material comprises a polymeric binder; and wherein the polymeric binder comprises a copolymer comprising a structural unit derived from an acid group-containing monomer and a structural unit derived from a hydrogen bond-forming group-containing monomer (ii). The method disclosed herein circumvents complex separation process, corrosion of current collector and contamination of polymeric binder, enables excellent materials recovery and allows the recycling of battery electrode to be achieved in a highly efficient manner.

A method can be used for manufacturing an ethylene-propylene-diene terpolymer for a fuel cell. A polymerization step includes subjecting an organic chelate compound forming a coordinate bond, a vanadium-based Ziegler-Natta catalyst, an organoaluminum compound, and ethylene, propylene, and diene monomers, together with a solvent, to polymerization in a reactor. A separation step includes recovering residual catalysts and unreacted monomers from the stream discharged from the reactor. An acquisition step includes recovering the solvent from the stream deprived of the residual catalysts and unreacted monomers to acquire the ethylene-propylene-diene terpolymer.

A method can be used for manufacturing an ethylene-propylene-diene terpolymer for a fuel cell. A polymerization step includes subjecting an organic chelate compound forming a coordinate bond, a vanadium-based Ziegler-Natta catalyst, an organoaluminum compound, and ethylene, propylene, and diene monomers, together with a solvent, to polymerization in a reactor. A separation step includes recovering residual catalysts and unreacted monomers from the stream discharged from the reactor. An acquisition step includes recovering the solvent from the stream deprived of the residual catalysts and unreacted monomers to acquire the ethylene-propylene-diene terpolymer.

Provided is a hydrogenated block copolymer composition comprising a hydrogenated block copolymer A represented by General Formula (A) and a hydrogenated block copolymer B represented by General Formula (B), wherein the weight ratio (A/B) of the hydrogenated block copolymer A to the hydrogenated block copolymer B is 10/90 to 80/20, and the hydrogenation ratio of olefins in the polymer components constituting the hydrogenated block copolymer composition is 10 to 100%:

Ar1.sup.a-HD.sup.a-Ar2.sup.a  (A)

Ar1.sup.b-HD.sup.b-A2.sup.b  (B)

wherein in General Formulae (A) and (B) above, Ar1.sup.a, Ar1.sup.b, Ar2.sup.a, and Ar2.sup.b are each an aromatic vinyl polymer block, HD.sup.a and HD.sup.b are each a hydrogenated polymer block of a conjugated diene polymer, and the ratio (Mw(Ar2.sup.a)/Mw(Ar1.sup.a)) of the weight average molecular weight of Ar2.sup.a (Mw(Ar2.sup.a)) to the weight average molecular weight of Ar1.sup.a (Mw(Ar1.sup.a)) is 2.6 to 66.

Provided is a hydrogenated block copolymer composition comprising a hydrogenated block copolymer A represented by General Formula (A) and a hydrogenated block copolymer B represented by General Formula (B), wherein the weight ratio (A/B) of the hydrogenated block copolymer A to the hydrogenated block copolymer B is 10/90 to 80/20, and the hydrogenation ratio of olefins in the polymer components constituting the hydrogenated block copolymer composition is 10 to 100%:

Ar1.sup.a-HD.sup.a-Ar2.sup.a  (A)

Ar1.sup.b-HD.sup.b-A2.sup.b  (B)

wherein in General Formulae (A) and (B) above, Ar1.sup.a, Ar1.sup.b, Ar2.sup.a, and Ar2.sup.b are each an aromatic vinyl polymer block, HD.sup.a and HD.sup.b are each a hydrogenated polymer block of a conjugated diene polymer, and the ratio (Mw(Ar2.sup.a)/Mw(Ar1.sup.a)) of the weight average molecular weight of Ar2.sup.a (Mw(Ar2.sup.a)) to the weight average molecular weight of Ar1.sup.a (Mw(Ar1.sup.a)) is 2.6 to 66.

Provided are a polymer having ultraviolet absorption functionality and preparation method thereof; specifically, three monomers having different ultraviolet absorption bands are used for copolymerization, achieving a significant expansion of the ultraviolet absorption range and achieving the effect of full-band ultraviolet shielding. The obtained polymer film has strong visible light transmittance, fluorescence, easy processing, excellent stability, and remarkable ultraviolet shielding performance, and can be broadly applied in such areas as aviation, construction, agriculture, and optical devices.