Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1997-12-12
1999-11-02
Gorgos, Kathryn
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415751, C01F 700
Patent
active
059763256
ABSTRACT:
A novel laser-induced precipitation process is disclosed for forming purified alumina hydrate from a sodium aluminate solution by illuminating with light wave energy produced by the near infrared wavelength, linearly polarized output of a laser. In one aspect, supersaturated sodium aluminate solution is treated by illuminating with light wave energy to produce a photo-induced nucleation of purified gibbsite aluminum trihydroxide crystals. Near infrared pulses of light wave energy, spatially and temporally overlapped inside the supersaturated sodium alumina, form a precipitated purified alumina hydrate without the need for external seed to be added.
REFERENCES:
Shemyakin, V.S. et al, "Photometric Separation in the Beneficiation of Bauxites From the South Ural Deposit," Dialog Abstract of Kompleks. Ispol'z. Miner Syr'va (4), 66-69. (no date available).
Shemyakin, V.S. et al, "Enrichmanet of Bauxites From the North Urals Mines by Photometric Separation," Dialog Abstract of Kompleks. Ispol'z. Miner Syr'va (2), 10-14. (no date available).
Ageeva, N.M. et al, "Stabiliazation of Wine by transferring irradiation of carbon dioxide laser by silver-gallium selenide frequency doubler," Dialog Abstract of Russian Patent No. 2003676. (no date availabl).
Garetz B.A. et al, "Nonphotochemical, Polarization-Dependent, Laser-Induced Nucleation in Supersaturated Aqueous Urea Solutions," Physical Review Letters, vol. 77, No. 16, pp. 3475-3476 (1996) Jul. 1996.
Denny P.E. et al, "Prodn. of nano-scale particles for e.g. catalysts, filters, sensors--by laser-liquid interaction through reactive chamber or plasma jet to fragment molecules of precursor soln. into nonoparticles," Derwent Abstract of US 953349 A 19950907. (no date available).
"New Ultrafine Metal Powder Production Process," Penn State Press Release (Oct. 30, 1997). No date aval.
"The 110% Solution," Science, vol. 274, p. 1325 (1996) (no date aval).
"Effect of ionizing irradiation on decomposition of aluminate solutions," ACS Abstract of Met Obogashch. (1969) 37-8. no month available.
Kuznetsov, S.I. et al, "Decomposing an aluminate solution," ACS Abstract of Russia SU Patent 188946. (No date available).
Aluminum Company of America
Brown Jonathan
Glantz Douglas G.
Gorgos Kathryn
Klepac Glenn E.
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