Entity

Time filter

Source Type

Daejeon, South Korea

Jang M.H.,Hallym University | Kim J.K.,Samyang Genex Corporation | Tak H.,Hallym University | Yoo H.,Hallym University
Journal of Materials Chemistry | Year: 2011

Hexagonal multi-layered gold spirangles were successfully synthesized in high yield through a simple process in aqueous solution. Commercially available Brij 700 surfactant was used as the reducing, capping, and shape-directing agent. The growth of single- and multi-layered gold crystals including spirangles was controllably changed through the change of reaction temperature. © 2011 The Royal Society of Chemistry. Source


Patent
Samyang Genex Corporation | Date: 2013-12-12

The present invention relates to a method for preparing an anhydrosugar alcohol using hydrol (namely, a crystalline mother liquor remaining after obtaining crystalline glucose from a crude glucose liquor). More particularly, the present invention relates to a method for preparing an anhydrosugar alcohol in a method for performing a dehydration reaction on the hydrogenated sugar so as to convert the hydrogenated sugar to an anhydrosugar alcohol, wherein the method for preparing an anhydrosugar alcohol is configured to use, as at least a portion of the hydrogenated sugar, the product obtained from the hydrogenation of the hydrol which is a by-product or waste generated during the production of glucose, thus relatively lowering the cost for a material as compared with a case of using a high purity raw material (for example, high purity sorbitol), to thus improve economical advantages, and further reduce the amount of waste and cost for disposal of the waste during the production of glucose.


The present invention relates to a technique for preparing an anhydrosugar alcohol using hydrogenated sugar as a raw material and, more specifically, to a technique for preparing a high-purity anhydrosugar alcohol by adding an acid to hydrogenated sugar (for example, hexitol) to convert same to an anhydrosugar alcohol, then distilling the converted liquid, and crystallizing the distilled liquid in a solvent, the technique removing a crystallization solvent from a crystallization mother liquor generated during a crystallization step and then introducing the resultant product together with the distilled liquid and the converted liquid into a distillation step, thereby being capable of improving the total distillation yield of the anhydrosugar alcohol, improving distillation efficiency by improving the mobility of a distillate, and further reducing the amount of generated waste and treatment costs and thus highly efficiently preparing the high-purity anhydrosugar alcohol at reduced costs.


Patent
Samyang Genex Corporation | Date: 2011-11-23

The present invention relates to a method for preparing hydroxyalkyl starch. The method for preparing hydroxyalkyl starch comprises the steps of hydrolyzing starch, reducing the hydrolyzed starch, and substituting the reduced starch with hydroxyalkyl group in a dry process.


The present invention relates to a technique for preparing an anhydrosugar alcohol using hydrogenated sugar as a raw material and, more specifically, to a technique for preparing a high-purity anhydrosugar alcohol (in particular, isosorbide, isomannide, isoidide, and the like) having a purity of 98% or higher and containing less than 0.1% of sorbitol and a sorbitan isomer, which are impurities, in a high total distillation yield of 94% or higher (more preferably, 95% or higher) by adding an acid to hydrogenated sugar (for example, hexitol) to convert same to an anhydrosugar alcohol, and then distilling the converted liquid over two or more stages by sequentially using a combination of an external condenser type wiped film evaporator and an internal condenser type short path evaporator.

Discover hidden collaborations