Resources Recycling (자원리싸이클링)
- Volume 5 Issue 3
- /
- Pages.56-64
- /
- 1996
- /
- 2765-3439(pISSN)
- /
- 2765-3447(eISSN)
Formation and Crystallization of Calcium Carbonate in $C_2H_5OH-Ca(OH)_2-CO_2$ System by Ceramic Bubble Plate Reactor.
Ceramic Bubble Plate를 이용한 $C_2H_5OH-Ca(OH)_2-CO_2$ 계의 탄산칼슘 생성 및 결정화 연구
- Ahn, Ji-Whan (Korea Institute of Geology, Mining & Materials(KIGAM) Minerals Utilization and Materials Division) ;
- Park, Chan-Hoon (Inha University, Mining and Mineral Engineering)
- Published : 1996.09.01
Abstract
C,H,OH system is widely used for producing synthetic beverages and pharmaceuticals. Calcium hydroxide suspension was used to callhol the morphology of calcium carbonate, and the charactenstics of the formahan and crystsllizatian of calcium cilrbonate by adding ethylenc glycol were determined A reaclor was made with attaching a ceramic bubble plate, and lhe eleclrical conductivity was continously monitored during the rcaction with CO, gas. A part of the suspension was separated and powdered at the transition point. XRD and electron microscopic observation showed that the intermedmte and final products were vilterite, ;~r;lganite and calcite. In this study, the volumc of the ethylene glycol added to CH,OH was fixed a1 10 vol\ulcornerh. The valumc of the suspension was 500 ml, and the changes oi characteristics were shdied along with variims cnntents(l0-50 g) of calcium hydroxide. Except m the case of 10 g of calcium hydroxide at the crystallization stagc, all of products showed gelation. Tne marc the calcium hydroxide the shorter the formation time. Alsa. the farmalion of spherical valcrile ivas obsemcd when 30 g Ca(OH), was added. Tne vaterite(a compound material) can bc synthesised under alnbienl pressure and lempcmhre m a C,H,OH system by morphology control. Even though the vateritc was meta-stable phasc and could bc changed to calcitc easily, the stable and spherical vateritc was observed by using G5 glass fillers and vacuum dricrs.
탄산칼슘의 다형 제어를 목적으로 합성 음료, 의약품 등으로서도 폭넓게 이용되고 있는
Keywords