Insoluble tannin preparation process, waste treatment process em

Details Insoluble tannin preparation process, waste treatment process em Insoluble tannin preparation process, waste treatment process em

1990-12-21

1992-10-27

Hunt, Brooks H.

Compositions

Radioactive compositions

Nuclear reactor fuel

252628, 252 82, 210681, 210682, 423 7, 423139, G21F 908

Patent

active

051587114

ABSTRACT:
There is disclosed an insoluble tannin preparation process, in which a tannin is first dissolved in an aldehyde aqueous solution. Then, ammonia is added to the solution to produce a precipitate, and the resulting precipitate is subjected to aging. The insoluble tannin thus prepared is employed to treat a waste liquid. Furthermore, there is disclosed an adsorption process in which a tannin is first dissolved in a solution containing a material to be adsorbed. Thereafter, an aldehyde is added to the solution to produce a precipitate having tannin as a principal constituent. The material to be adsorbed is adsorbed to this precipitate.

REFERENCES:
patent: 4190463 (1980-02-01), Kaplan
patent: 4558080 (1985-12-01), Quamme et al.
patent: 4944812 (1990-07-01), Lindert et al.
patent: 4948513 (1990-08-01), Mitchell
Database WPIL, accession no. 88-334727 [47], Derwent Publications Ltd. London; & Patent Abstracts of Japan, vol. 13, No. 56 (C-566), Feb. 8, 1989; & JP-A-63 248 491 (Mitsubishi Genshi Nuclear Fuel).
Database WPIL, accession No. 89-217413 [30], Derwent Publications Ltd., London GB; & Patent Abstracts of Japan, vol. 13, No. 417 (C-636), Sep. 14, 1989; & JP-A-1 155 947 (Koji Sakaguchi).
Database WPIL, accession No. 90-079317 [11], Derwent Publications Ltd., London, GB; & Patent Abstracts of Japan, vol. 14, No. 185 (P-1036), Apr. 13, 1990; & JP-A-2 032 299 (Mitsubishi Genshi Nuclear Fuel).
Chemical Abstracts, vol. 109, No. 16, Oct. 17, 1988, p. 540, left-hand col., Abstract No. 137281f, Columbus, Ohio, US; & JP-A-63 61 988 (K. Sakaguchi) Mar. 18, 1988.

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