Korea Research Institute of Chemical Technology

Jeong Yong Ryu

Bong Keun Song

Yong Hwan Kim

Jong-Ho Shin

Jae Kwang Song

Say Kyoun Ow

Kyoung Rak Ji

Eun Suk An

Hyun Jeong

Jeong Mi Kwon

Seung Yeong Park

Kee Hoon Won

Keehoon Won

The present invention relates to a process for preparing phenolic polymers utilizingperoxidase. More particularly, the present invention relates to a process for preparing phenolic polymers by polymerizing phenolic monomers withperoxidase instead of using typical peroxidase which essentially requires the use of toxic formalin or peroxidase of plant origin which is very costly and easily deactivated by hydrogen peroxide in the polymerization of phenolic monomers, wherein the polymerization is conducted in the presence of a polar organic solvent under mild reaction conditions of atmospheric temperature and pressure to economically produce desired phenolic polymers having excellent water and chemical resistances with high yield.

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The present invention relates to a process for preparing a phenolic polymer using a phenothiazine-based mediator, in particular, to a process for preparing a phenolic polymer via polymerization of phenolic monomers by using a phenothiazine-based mediator in the presence of peroxidase biocatalyst and an oxidant, thereby drastically improving the enzyme reactivity of peroxidase. The phenolic polymers prepared according to the polymerization of this invention maintain unsaturated hydrocarbon groups linked to their side chains, so that they are very useful as a curing resin because they can easily form coatings through radical curing. In addition, the coating formed using the curing resin has an antioxidation effect and a low surface energy, so that they can prevent physical attachment of marine livings. Because the antifouling-causing functional groups are not consumed, the coatings continuously exhibit durability.

Process for preparing phenolic polymer by using phenothiazines mediator

The present invention relates to a method for recycling of old corrugated container (OCC) using flotation and kneading treatment and more particularly, to a method for recycling of OCC, wherein OCC is treated withflotation and kneading, treatment, and thereby removing fines and ink spot in the waste pulp and improving the strength and drainage property. As a result, it can be recycled similar to the expensive virgin unbleached kraft pulp.

Method for recycling of old corrugated container using flotation and kneading treatment

The present invention relates to a method for recycling of old corrugated container (OCC) using flotation, followed by selective enzymatic treatment to fines portion and by selective refining to long fiber stream, and more particularly, to a method for recycling of OCC, wherein OCC is treated with floatation and enzymatic hydrolysis and those recycled stock is refined, thereby having the following effects:

Method for recycling of old corrugated container using flotation and

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Daejeon, South Korea

Jeong Yong Ryu