METHOD OF ASBESTOS DEGRADATION AND ASBESTOS DEGRADATION APPARATUS

WIPO Patent Application WO/2008/001464

A1

Untreated asbestos substance and water are placed in reaction vessel (2). Subsequently, hydrofluoric acid is injected, and agitated while pulverizing the asbestos substance to thereby attain degradation of the asbestos by hydrofluoric acid. After the execution of degradation processing, the resultant reaction mixture is loaded with a fluoride ion adsorbent and a metal ion adsorbent. Thereafter, a neutralizing agent is added, and under agitation, neutralization is effected. Further, a coagulant is added, thereby obtaining aggregates. As the asbestos is converted by hydrogen fluoride into hexafluorosilicic acid (salt) and magnesium fluoride, the asbestos is completely eliminated and becomes nonasbestos inorganic substances, thereby attaining detoxification to human health. As the ion adsorption, neutralization and coagulation steps of the reaction mixture resulting from the chemical degradation of asbestos can be performed in hermetically sealed reaction vessel (2), safety can be ensured. As batch operation can be made by the use of the reaction vessel (2), large-volume processing can be realized.

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KAKEGAWA, Hisao (National University Corporation Kagawa University 2217-20, Hayashi-choTakamatsu-sh, Kagawa 96, 7610396, JP)
掛川 寿夫 (〒96 香川県高松市林町２２１７－２０ 国立大学法人香川大学工学部内 Kagawa, 7610396, JP)
SUENAGA, Yoshihiro (National University Corporation Kagawa University 2217-20, Hayashi-choTakamatsu-sh, Kagawa 96, 7610396, JP)
末永 慶寛 (〒96 香川県高松市林町２２１７－２０ 国立大学法人香川大学工学部内 Kagawa, 7610396, JP)
TANAKA, Yasuhiro (National University Corporation Kagawa University 2217-20, Hayashi-choTakamatsu-sh, Kagawa 96, 7610396, JP)

JP2006/313116

January 03, 2008

June 30, 2006

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ONC CO., LTD. (2-28-4, Higashinihonbashi Chuou-k, Tokyo 04, 1030004, JP)
オー・エヌ・シー株式会社 (〒04 東京都中央区東日本橋二丁目２８番４号 Tokyo, 1030004, JP)
E.S.T JAPAN CO., LTD. (EGG ONE Bldg, 1-4-31 Minamikaneden, Suita-sh, Osaka 44, 5640044, JP)
株式会社イーエスティージャパン (〒44 大阪府吹田市南金田１丁目４番３１号 エッグワンビル Osaka, 5640044, JP)
NATIONAL UNIVERSITY CORPORATION KAGAWA UNIVERSITY (1-1 Saiwai-cho, Takamatsu-shi Kagawa, 21, 7608521, JP)
国立大学法人香川大学 (〒21 香川県高松市幸町１番１号 Kagawa, 7608521, JP)
KAKEGAWA, Hisao (National University Corporation Kagawa University 2217-20, Hayashi-choTakamatsu-sh, Kagawa 96, 7610396, JP)
掛川 寿夫 (〒96 香川県高松市林町２２１７－２０ 国立大学法人香川大学工学部内 Kagawa, 7610396, JP)

B09B3/00; A62D3/00; B09B3/00; A62D3/00

YAMAUCHI, Yasunobu et al. (YAMAUCHI Patent Attorney, Nihon Seimei-Takamatsu-Ekimae Bldg. 3F,,1-1-8, Kotobuki-cho, Takamatsu-shi Kagawa, 760-0023, JP)

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