A method for preparing dispersant using lignin degradation products includes preparation of lignin degradation products: degrading lignin which are used as raw materials using alkali through microwave-assisted activation at the presence of a metal oxide catalyst to obtain the lignin degradation products; and preparation of dispersant: preparing dispersant by molecularly reforming and chemically modifying the lignin degradation products obtained in the step of preparation of lignin degradation products.

A method for preparing dispersant using lignin degradation products includes preparation of lignin degradation products: degrading lignin which are used as raw materials using alkali through microwave-assisted activation at the presence of a metal oxide catalyst to obtain the lignin degradation products; and preparation of dispersant: preparing dispersant by molecularly reforming and chemically modifying the lignin degradation products obtained in the step of preparation of lignin degradation products.

A method for preparing dispersant using lignin degradation products includes preparation of lignin degradation products: degrading lignin which are used as raw materials using alkali through microwave-assisted activation at the presence of a metal oxide catalyst to obtain the lignin degradation products; and preparation of dispersant: preparing dispersant by molecularly reforming and chemically modifying the lignin degradation products obtained in the step of preparation of lignin degradation products.

A method for preparing dispersant using lignin degradation products includes preparation of lignin degradation products: degrading lignin which are used as raw materials using alkali through microwave-assisted activation at the presence of a metal oxide catalyst to obtain the lignin degradation products; and preparation of dispersant: preparing dispersant by molecularly reforming and chemically modifying the lignin degradation products obtained in the step of preparation of lignin degradation products.

A process for the preparation of a 2,6-di(C.sub.1-7 alkyl)phenol composition includes reacting phenol and a C.sub.1-7 alkyl alcohol in the presence of a catalyst to form the 2,6-di(C.sub.1-7 alkyl)phenol; and isolating the 2,6-di(C.sub.1-7 alkyl)phenol composition by distillation N using a reflux ratio of greater than or equal to 4.0. The 2,6-di(C.sub.1-7 alkyl)phenol composition includes less than or equal to 0.2 wt % of chain-stopper impurities, based on the total weight of the 2,6-di(C.sub.1-7 alkyl)phenol composition. The 2,6-di(C.sub.1-7 alkyl)phenol composition can be useful for the preparation of poly(phenylene ethers).

A process for the preparation of a 2,6-di(C.sub.1-7 alkyl)phenol composition includes reacting phenol and a C.sub.1-7 alkyl alcohol in the presence of a catalyst to form the 2,6-di(C.sub.1-7 alkyl)phenol; and isolating the 2,6-di(C.sub.1-7 alkyl)phenol composition by distillation N using a reflux ratio of greater than or equal to 4.0. The 2,6-di(C.sub.1-7 alkyl)phenol composition includes less than or equal to 0.2 wt % of chain-stopper impurities, based on the total weight of the 2,6-di(C.sub.1-7 alkyl)phenol composition. The 2,6-di(C.sub.1-7 alkyl)phenol composition can be useful for the preparation of poly(phenylene ethers).

Disclosed is a paint composition containing graphene oxide for preventing corrosion of a structure and improving water repellency, corrosion proof and long-term durability of a concrete structure. The paint composition includes a powder mixture containing 0.2 to 1.0 weight % of zinc (Zn), 0.02 to 0.3 weight % of graphene oxide, 0.06 to 0.11 weight % of phosphorus, and a remaining amount of aluminum (Al); and an adhesive resin in which the powder mixture is uniformly dispersed.

Disclosed is a paint composition containing graphene oxide for preventing corrosion of a structure and improving water repellency, corrosion proof and long-term durability of a concrete structure. The paint composition includes a powder mixture containing 0.2 to 1.0 weight % of zinc (Zn), 0.02 to 0.3 weight % of graphene oxide, 0.06 to 0.11 weight % of phosphorus, and a remaining amount of aluminum (Al); and an adhesive resin in which the powder mixture is uniformly dispersed.

A method of synthesizing a resin including mixing a first solution including a melamine compound with a second solution including glutaraldehyde to form a third solution, heating the third solution to 35 C. to 90 C. in at a pH above 7 for 5 to 70 minutes, and cooling the third solution to room temperature.

A method of synthesizing a resin including mixing a first solution including a melamine compound with a second solution including glutaraldehyde to form a third solution, heating the third solution to 35 C. to 90 C. in at a pH above 7 for 5 to 70 minutes, and cooling the third solution to room temperature.