Removal of Arsenic from the Industrial Phosphorus by Zone Melting Technique
A novel zone melting method to purify industrial phosphorus is introduced. Since there is no chemical solvent for phosphorus, chemical extraction purification does not work for arsenic purification. Zone melting is a method for removing impurities from solid materials. This method with a special setup is now adopted in the purification of phosphorous and can reduce the arsenic concentration to below 100ppm.
Phosphorus is an essential element for living creatures. It particularly involves in energy production in muscle contractions. Therefore, addition of suitable amounts of phosphorus to food and forage has been suggested. However, industrial solid phosphorus contains too high arsenic concentration(80 - 100 ppm) that can cause severe poisoning to human and livestock, especially when arsenic is associated with increased risk of several types of cancer. Purification of industrial phosphorus is of great importance for food industry.
1. There is not any known method for the purification of solid phosphorus
- Purification of industrial phosphorus for food, medicine, and forage industry
Patent Number: HK1068323A1
Application Number: HK5100469A
Inventor: MI YONGLI | LI NING
Priority Date: 18 Jan 2005
Priority Number: HK1068323A1
Application Date: 18 Jan 2005
Publication Date: 9 Mar 2007
Assignee Applicant: The Hong Kong University of Science & Technology
Title: Removal of arsenic from the industrial phosphorus by zone melting technique
Usefulness: Removal of arsenic from the industrial phosphorus by zone melting technique
化工/材料
化工/材料应用
18 Jan 2005
Hong Kong 05100469.7
Hong Kong HK1068323
TTC.PA.182
香港
