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1. (WO2018052220) METHOD AND FACILITY FOR PREPARING SODIUM BICARBONATE AND CALCIUM CARBONATE

Pub. No.:    WO/2018/052220    International Application No.:    PCT/KR2017/009836
Publication Date: Fri Mar 23 00:59:59 CET 2018 International Filing Date: Fri Sep 08 01:59:59 CEST 2017
IPC: C01F 11/18
B01J 19/00
Applicants: RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
재단법인 포항산업과학연구원
INDUSTRY ACADEMIC COOPERATION FOUNDATION KEIMYUNG UNIVERSITY
계명대학교 산학협력단
Inventors: HAN, Kun-Woo
한건우
AHN, Chi-Kyu
안치규
LEE, Man-Su
이만수
LEE, Min-Woo
이민우
KIM, Gook-Hee
김국희
SON, Min-Ah
손민아
PARK, Du-Young
박두영
KIM, Se-Hun
김세훈
Title: METHOD AND FACILITY FOR PREPARING SODIUM BICARBONATE AND CALCIUM CARBONATE
Abstract:
According to one embodiment of the present invention, provided is a method and a facility for preparing sodium bicarbonate and calcium carbonate, comprising the steps of: producing sodium bicarbonate (NaHCO3) through a reaction of sodium hydroxide and carbon dioxide by supplying a carbon dioxide-containing gas to a sodium hydroxide (NaOH) solution; producing calcium carbonate (CaCO3) through a reaction of a carbonate ion (CO32-) and a calcium ion by supplying a calcium ion-containing solution to the filtrate remaining after recovering the sodium bicarbonate; and resupplying the filtrate remaining after recovering the calcium carbonate to a solution in which the sodium hydroxide is dissolved, wherein a sodium salt having a solubility higher than that of the sodium bicarbonate is added to the sodium hydroxide solution. According to the present invention, there are effects enabling calcium carbonate and sodium bicarbonate, which are high-value-added materials, to be produced together from industrial by-products, which are to be disposed, and preventing the problem of a dissolution rate decrease of calcium ions when implementing a continuous process.