The obtained results allow to allocate 3 limiting stages of the process: 150 – 160°C — a chemical reaction ( E a = 70.88 kJ/mol), 160 – 170°C — intermediate region ( E a = 40.22 kJ/mol), 170 – 180°C — diffusion area ( E a = 22.66 kJ/mol). Thermodynamic modeling of...
Basic Principles of Bayer Process Design, Extractive Metallurgy of Aluminium, Vol. I, Publ.: Interscience, New York, 1963; Kirk-Othmer, Encyclopaedia of Chemical Technology, Vol. 1, 4thedition, John Wiley, New York, (1991-98); and Crockett,Bauxite, Alumina and Aluminium, Publ.: H.M.S.O...
3. An extraction process according to claim 1 or claim 2, in which the metal compound is a metal hydroxide or a hydroxide-containing salt of the metal. 4. An extraction process according to claim 1 or claim 2, in which the metal compound is aluminium hydroxide, the aqueous phase at en...
As to the AAO technique, self-organized wet etching of aluminium in spatially regular, triangular order seems to be the simplest and lowest cost one among all the above methods12. However, it is disposable and not easy to transfer the AAO pattern to the emission surface directly, especially ...
The plate was sealed with an aluminium plate seal (6524AL, Corning), vortexed at high speed for 4 minutes and incubated at 100 °C for 2 minutes in a thermocycler. The plate was cooled on ice for 10 minutes before carefully removing the plate seal and using 0.2 μl ...
Disposable aluminium plates of 25 mm were used as measurement geometry with 1 mm gap between plates. Steady state shear determinations were carried out at different shear rates from 0.1 to 10 s−1. Small amplitude oscillatory shear determinations were made within the linear viscoelastic region (1...
Extraction 专利名称：Extraction 发明人：Markham, David,Brown, Clifford Gordon,Simon, John Martin 申请号：EP82305004.2 申请日：19820922 公开号：EP0076094A2 公开日：19830406 专利内容由知识产权出版社提供 专利附图：摘要：To extract a metal value, particularly aluminium, from an aqueous feed stream (...
an absorbing collimation, but a diffuse or semidiffuse channel with high Fermi potential reflects them back into the vessel. This avoids unnecessary losses and keeps the storage time high, which may be beneficial when the vessel is part of a UCN source with long buildup time of ...
11. The method of claim 1, further comprising a step of precipitating aluminium sulphate from either: a. the permeate produced from the hydrolysis liquor; or b. the permeate comprising at least titanyl sulphate. 12. The method of claim 1 wherein the particulate material is selected from the...
FIG. 5 is a graphical presentation of the removal of aluminium into an aqueous solution in the organic extraction solution scrubbing stage as a function of time. DETAILED DESCRIPTION OF THE INVENTION The invention relates to a method for the selective recovery of uranium by solvent extraction from...