MODIFICATION OF RAW ORE OF BENTONITE AND PROPERTY OF CPAM/BENTONITE RETENTION AID SYSTEM
Raw ore of bentonite is abundant in China, but most ore is calcium-base bentonite of poor quality. Therefore the bentonite used as anionic microparticle component in papermaking is import product mostly. For improving the quality, the bentonite ore was modified from calcium-base to sodium-base and the property of CPAM/bentonite retention aid system were investigated in this work. Various modifiers were applied in the preparation and the characteristics of bentonite were compared using X-ray diffraction, and the expansion times and colloid index were measured before and after modification. Results indicated that sodium-base bentonite could be prepared from calciumbase bentonite by modification in this investigation, and the microparticle retention aid system combined CPAM with modified bentonite could improve the first pass retention obviously. Results also showed that the sodium citrate was the best modifier in this research and the modified bentonite was comparable to the import bentonite product.
bentonite modification microparticle retention aid system
Hu Fang Shi Changwei Li Honggang
College of Light Industry & Textile Industry, Qiqihar University, Qiqihar, 161006, China
国际会议
广州
英文
449-451
2006-11-08（万方平台首次上网日期，不代表论文的发表时间）