CAJ | 학술논문

以云南砚山膨润土为初始原料,通过提纯与钠化改型制备钠基蒙脱石催化剂载体.探讨了钠化剂种类与用量、钠化温度、钠化时间及精制钙基土悬浮液浓度对改型效果的影响,获得了优化的钠化改型条件,并通过 X 射线衍射分析测定了膨润土原矿、精制钙基土和钠化改型膨润土 d(001)晶面间距.结果表明,NaF 改型效果明显优于 NaCl,以提纯后精土质量5%的 NaF 在60℃下对精制钙基膨润土钠化改型5 h,可以得到钠基蒙脱石催化剂载体,其层间距为1.28 nm,阳离子交换容量达87.3 mmol/100g.
이운남연산팽윤토위초시원료,통과제순여납화개형제비납기몽탈석최화제재체.탐토료납화제충류여용량、납화온도、납화시간급정제개기토현부액농도대개형효과적영향,획득료우화적납화개형조건,병통과 X 사선연사분석측정료팽윤토원광、정제개기토화납화개형팽윤토 d(001)정면간거.결과표명,NaF 개형효과명현우우 NaCl,이제순후정토질량5%적 NaF 재60℃하대정제개기팽윤토납화개형5 h,가이득도납기몽탈석최화제재체,기층간거위1.28 nm,양리자교환용량체87.3 mmol/100g.
A natural bentonite resource from Yanshan county in Yunnan province was used as raw materials to prepare Na-montmorillonite catalytic support by purification and sodium modification. The influence of the type and dosage of the modification agent, the sodium modification temperature and time as well as the concentration suspension of purified clay on the modification were discussed in order to obtain the optimum conditions for sodium modification. The basal spacing of the raw bentonite, purified bentonite and sodium-modified bentonite were characterized respectively by X-ray diffraction. The results showed that NaF was better than the traditional modification reagents NaCl. Na-Montmorillonite catalytic support with 1.28 nm of basal spacing and 87.3 mmol/100g of the cation exchange capacity was obtained by using 5% NaF as modification reagents to modify the purified Ca-montmorillonite at 60 ℃ for 5 h.