Synergistic Extraction of Gold by Di-(2-ethylhexyl)phosphoric Acid - Isodecanol

Abstract

Objective and Background: Synergistic extraction was introduced to replace single extraction due to enhanced extraction efficiency of heavy metal. Methodology: In order to improve extraction efficiency, di-(2-ethylhexyl) phosphoric acid (D2EHPA) was mixed with isodecanol to provide a synergistic effect together with leaching solution which is thiourea. From the single extraction system, the optimum temperature is found at 30°C producing the highest yield of %E of 91.30%. The single extraction also happened better with the presence of Fe(III) solution and thiourea as the %E is at 91.23%. Results and Conclusion: It was found that the synergistic D2EHPA-isodecanol extraction is successful as it yields higher %E than the single D2EHPA extraction.

Recent advances of ring opening of epoxidation of palm oil derived from oleic acid via in situ hydrolysis under moderate temperature

“…The oxirane ring, often known as the epoxy group, is highly reactive and goes through ring opening processes. 12 This phenomenon is to be focused on this research because along with hydrolysis, it can produce crude DHSA. DHSA crude is a high value hydroxyl fatty acid which consist of two alcohol group and carboxylic group in the long hydrocarbon chain.…”

“…The adaptability of the epoxy group toward a wide range of chemical reactions and in producing useful qualities in the finished products is the root of the widespread interest in epoxy resins. The oxirane ring, often known as the epoxy group, is highly reactive and goes through ring opening processes 12 . This phenomenon is to be focused on this research because along with hydrolysis, it can produce crude DHSA.…”