Sk Innovation Co., Ltd.

Sk Global Chemical Co., Ltd.

Sk Geo Centric Co., Ltd.

In Hyoup Song

Sung Real Son

Suk Joon Hong

Yoon Jae Yim

Young Bo Choi

Sang Il Lee

Hyo Seung Park

Tae Seung Kim

Woo Sung Jung

Dae Hyun Choo

Jae Suk Choi

Hong Chan Kim

Sang Hyun Cho

Sang Hye Shin

Il Gu Jung

Jung A Lee

Chansaem Park

Sungreal Son

Wan Ju Jeong

Jisun Choi

Jong Ho Choi

Jang Hoon Ock

Daehyun Choo

In a method of producing an ethylene-carboxylic acid copolymer according to an embodiment of the present invention, a carboxylic acid monomer and a polar co-solvent are introduced separately into a mixing unit or stored together in a supply unit to form a mixture. The mixture and ethylene are injected into a reactor to be copolymerized. Reaction kinetic properties of the carboxylic acid monomer and the polar co-solvent are controlled to suppress a formation of by-products.

Method for producing ethylene-carboxylic acid copolymer

The present invention relates to a method for preparing paraffin, and can provide a method for preparing paraffin including a hydrogenation step of by-products of a process for preparing linear alpha olefins. Since the method for preparing paraffin of the present invention can convert the by-products of the process for preparing linear alpha olefins to paraffin at a high conversion ratio, it is possible to increase the added value of the by-products.

Method for preparing paraffin

Provided are a fouling inhibitor and a method of oligomerizing an olefin using the same. More particularly, in the method of oligomerizing an olefin, it is possible to minimize a total amount of polymers produced during a reaction and basically inhibit fouling of the polymers produced during the reaction onto an inner wall of a reactor by injecting a predetermined fouling inhibitor.

Method of inhibiting reactor fouling and oligomerisation of olefin using the same

The present invention provides a method for preparing anhydrosugar alcohol, in which the reaction temperature in a vacuum reaction that converts sugar alcohol into anhydrosugar alcohol is controlled to two steps of temperature that is, a first-step low reaction temperature of 100 to 150&#xb0; C. and a second-step high reaction temperature of 151 to 240&#xb0; C., so that the selectivity for the intermediate product 1,4-sorbitan can be increased, thereby increasing the yield of anhydrosugar alcohol.

Method of preparing anhydrosugar alcohol by two-step reaction

The present invention relates to a method of producing anhydrosugar alcohol by dehydrating sugar alcohol at high pressure in the presence of a catalyst which is less acidic than a conventional sulfuric acid catalyst and which can suppress side reactions at high temperature. According to the present invention, anhydrosugar alcohol can be produced in a yield similar to that in a vacuum reaction.

Method for producing anhydrosugar alcohol by high-pressure reaction

The present invention relates to a method of producing and purifying a high-purity anhydrosugar alcohol in high yield by a simple process and apparatus, the method includes the steps of: allowing a sugar alcohol to react in the presence of an acid catalyst in a reactor, and, at the same time, evaporating a product of the reaction; cooling the evaporated product to remove water and obtain a crude anhydrosugar alcohol; and introducing the crude anhydrosugar alcohol into a melt crystallization process to obtain a high-purity anhydrosugar alcohol.

Efficient method for producing and purifying anhydrous sugar alcohol

A method for producing anhydrosugar alcohol according to the present invention can increase the yield of anhydrosugar alcohol even in the absence of a catalyst or in the presence of a small amount of a transition metal salt catalyst by controlling the temperature of a high-temperature reaction, which converts sugar alcohol to anhydrosugar alcohol, in two steps, that is, a first low-temperature reaction step and a second high-temperature reaction step.

Method for preparing anhydrosugar alcohol using two-step hydrothermal reaction

The present invention provides a method for producing anhydrosugar alcohol, including: feeding sugar alcohol into a reactor and performing a dehydration reaction of the fed sugar alcohol to produce anhydrosugar alcohol; and supplying steam to the reactor to evaporate the produced anhydrosugar alcohol. According to the present invention, anhydrosugar alcohol can be produced in a high yield by increasing the specific surface area of reaction mother liquor and reducing the partial pressure of the product.

Method of producing anhydrosugar alcohol using steam

The present invention relates to a method for producing anhydrosugar alcohol using an organic additive having one hydroxyl group. The present invention makes it possible to prevent oligomers and polymers from being produced by polymerization of isosorbide during dehydration of sorbitol molecules, and thus solves problems, including a reduction in fluidity in a dehydration reactor, interference with the flow of fluids in the reactor and pipelines, and interference with stirrer operation, which occur due to the oligomers and polymers.

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Daejeon, South Korea

In Hyoup Song