Liquid membranes copper recovery

Mahdi C, Oualid H, Fatiha A, Christian P (2010) Study on ultrasonically assisted emulsification and recovery of copper(II) from wastewater using an emulsion liquid membrane process. Ultrason Sonochem 17(2) 318-325... 

T. Largman and S. Sifniades, Recovery of Copper (II) from Aqueous Solutions by Means of Supported Liquid Membranes, Hydrometall. 3, 153 (1978). 

Recovery of copper from ammoniacal medium using liquid membranes, with LIX 54. Separation and Purification Technology, Correct. Proof. 

Ho, W.S.W., Poddar, T.K. and Neumuller, T.E. (2002) Removal and recovery of copper and zinc by supported liquid membranes with strip dispersion. Journal of the Chinese Institute of Chemical Engineers, 33, 67. 

Yang, Q. and Kocherginsky, N.M. (2006) Copper recovery and spent ammoniacal etchant regeneration based on hollow fiber supported liquid membrane technology From bench-scale to pilot-scale tests. Journal of Membrane Science, 286, 301. 

Nilsen DN, Hundley GL, Galvan GJ, and Wright JB. Field testing of a liquid-emulsion membrane system for copper recovery from mine solutions. In Bartsch RA, Way JD, eds. Chemical separations with liquid membranes, Washington, DC American Chemical Society, ACS symposium series 642, 1996 329-341. 

Valenzuela, F., Basualto, C., Tapia, C., Sapag, J. (1999). Application of hoUow-fiber supported liquid membranes technique to the selective recovery of a low content of copper from a Chilean mine water (Short communication). Journal of Membrane Science 155 163-168. 

As a result, liquid-membrane processes have received a great deal of attention for the potential recovery of copper,uranium,1 11 and nickel.10,35,16... 

FIGURE 19,4-7 Flow diagram for copper recovery using liquid membranes. From Mairand and Kopp37 widi permission. 

Frankenfeld et al. (85) reported a similar study on the recovery of copper with ELM technology. The ELM used had a typical hydrocarbon phase formulation of 2.0 mass % nonionic polyamine surfactant, 2.5 beta hydroxyoxlme carrier, and the balance isoparaffinio hydrocarbon solvent. The internal aqueous phase of the emulsion was approximately 20 mass % HaSO. Using a basis of a 2.7 x 10 liquid membrane plant would save 40 t in capital costs with nearly identical operating costs. 

W. Zhang, C. Cui, Z. Ren, Y. Dai, and H. Meng, Simultaneous removal and recovery of copper(II) from acidic wastewater by hollow fiber renewal liquid membrane with LIX984N as carrier, Chem. Eng. J. 157 (2010) 230-237. 

Apart from the work conducted by Li et al. at Exxon which is fully reported in the proceedings of a seminar on Liquid Membrane Applications in Waste Water Treatment and Metals Recovery held at UMIST in May 1980, investigations on applications of liquid membranes to metals recovery are conducted at a number of other places. Thus, extraction of copper is studied at UMIST (11, 12), Graz (13-15) and Bend Research (16). The last place is also active in the use of membranes for the extraction of uranium (17), whereas work on the extraction of copper, zinc, cadmium and lead is conducted by Boyadzhiev et al. (18). Extraction of different metals has also been studied by Stelmaszek (19) and Strzelbicki (20, 21) and of zinc alone at Imperial College (7). All the accumulated data point towards membrane extraction as a promising process for the solution of separation problems, particularly in dilute solutions. 

In Chapter 23, Nilsen et al. describe the field testing of an emulsion liquid membrane system for copper recovery from mine solutions. The small, pilot plant-scale, continuous circuit for the recovery of copper from mine waste waters and low-grade leach solutions was field tested at a copper mine. Formulation of the emulsion membranes was optimized to provide emulsions with good stability during extraction, but which could be easily broken in an electrical coalescer under mild conditions. Typical results from the tests were >90 percent copper recovery, while maintaining the membrane swelling in the range of 4-8 percent. Cost evaluations indicate the potential for cost-effective recovery of copper from such solutions. 

Using a 20 cm long HFCLM permeator containing two sets of 180 Celgard X-10 fibers, Nguyen and Callahan (77) studied selective recovery of copper from zinc present in an aqueous ammonia solution by means of a liquid membrane of LIX 54 (phenyl alkyl beta-diketone, Henkel Corporation, Tucson, AZ). Nitrogen... 

Field Testing of a Liquid-Emulsion Membrane System for Copper Recovery from Mine Solutions... 

Largman, T., and Sifniades, S. (1978). Recovery of copper (II) from aqueous solutions by means of supported liquid membranes. Hydrometallurgy 3, 153. 

Following the work of Bloch and Vofsi, two other methods of producing immobilized liquid films were introduced. Both are still under development. In the first approach, the liquid carrier phase is held by capillarity within the pores of a microporous substrate, as shown in Figure 9.4. This approach was first used by Miyauchi14 and further developed by Baker et al15-17 and by Largman and Sifniades.18 The principal objective of this early work was the recovery of copper and other metals from hydrometallurgical solutions. Despite considerable effort on the laboratory scale, the first pilot plant was not installed until 1980.19-20 The principal problem is instability of the liquid carrier phase in the micro-porous membrane support. 

---