Passive spiral micromixer and its applications

US8894966B2 · kind B2 · utility

Assignees

• INSTITUTE OF PROCESS ENGINEERING, CHINESE ACADEMY OF SCIENCES · CN
• NANJING JIUZHANG CHEMICAL TECHNOLOGY CO., LTD. · CN

Inventors

• Chao-Hsun Yang · Hsinchu, TW
• Xi Ning Wang · Beijing, CN
• Yumei Yong · Beijing, CN
• Guangji Zhang · Beijing, CN
• Jingcai Cheng · Beijing, CN
• Xin Feng · Canton, US
• Xiangyang Li · Shanghai, CN
• Weipeng Zhang · Xi'an, CN
• Yuanyuan Li · Beijing, CN
• Zaisha Mao · Beijing, CN

Key dates

• Filing date: Oct 31, 2013
• Grant date: Nov 25, 2014
• Expiry date: Oct 31, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S977/773
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A micro-mixer and use thereof for synthesis of barium sulfate particles is disclosed. The micro-mixer includes feeding tubes, reservoirs, a mixing channel, a buffer reservoir and a sampling tube. The mixing channel is made of hydrophobic materials and processed into a spiral structure, in which baffles are set in interval arrangement at both sides of the channel wall. The types of the baffles include leaning-forward baffles, vertical baffles and leaning-backward baffles. Setting the baffles helps produce local secondary flow in the mixer, which enhances fluids mixing process. The micro-mixer is suitable to rapid reactions or precipitation processes, whose reaction time is much less than mixing time, and has broad application prospects in many fields involving mixing reaction such as pharmaceutical and chemistry industry.