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公开(公告)号：EP0657388A4
公开(公告)日：1996-05-01
申请号：EP94910566
申请日：1994-03-30
申请人： TOTO LTD
发明人： HIASA MASAMI , ASHIE NOBUYUKI , SAITO SUSUMU , OHTANI TAKAYUKI
CPC分类号： C02F1/766 , B01J20/20 , B01J20/28023 , B01J20/28078 , B01J20/2809 , B01J20/3416 , B01J20/3483 , B01J2220/62 , C02F1/003 , C02F1/283
摘要： A method and apparatus for purifying water by the active carbon regeneration system. Contact of tap water with active carbon fibers having a narrow pore distribution and excellent adsorption velocity enables adsorption and removal of residual chlorine, harmful trihalomethanes, and odoriferous substances such as 2-methylisoborneol and diosmin contained in tap water. The use of active carbon fibers having a median pore diameter of about 1.8-3.0 nm, preferably, about 2.0-2.7 nm enables odoriferous substances having large molecular weights to be exhaustively and selectively adsorbed by the carbon fibers. At any time when out of use, the carbon fibers are heated to 100-120 DEG C, whereby the adsorbed trihalomethanes are desorbed and the fibers recover the capacity of adsorbing trihalomethanes. Thus the carbon fibers can, even in a limited quantity, adsorb trihalomethanes and odoriferous substances for long without the necessity for exchanging active carbon fiber cartridges.
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公开(公告)号：EP0947592A4
公开(公告)日：2000-03-22
申请号：EP97939214
申请日：1997-09-08
申请人： TOTO LTD
摘要： To provide a metallic material, in particular, brass, which is excellent in mechanical strength, cutting performance, ductility in hot working, and anticorrosion. Brass according to the invention is roughly classified into four types including " alpha + gamma ", " alpha + beta + gamma ", " alpha + normal beta " and " alpha + reinforced beta ". Brass of alpha + gamma type is alpha + gamma at room temperature, and its alpha phase has an area ratio of 97 to 70 %. Brass of alpha + beta + gamma type is alpha + beta + gamma at room temperature, and its beta phase and gamma phase, respectively, have area ratios of 3 to 30 %. In these two types, the gamma phase contains 8 wt.% Sn or more. Brass of alpha + normal beta type is alpha + beta at room temperature, and its beta phase has an area ratio of 20 % or more. Brass of alpha + reinforced beta type is alpha + beta at room temperature, and its beta phase has an area ratio of 15 % or more, and its beta phase contains 1.5 wt.% Sn or more. Brasses of all the types are alpha + beta in recrystallization temperature region, and their beta phases have area ratios of 30 to 80 %. Average crystal grain sizes of alpha and beta are 15 mu m or less, and preferably 10 mu m or less. An average crystal grain of gamma has an average minor axis of 8 mu m or less, and preferably 5 mu m or less. Brasses of alpha + gamma and alpha + gamma + beta have an apparent Zn content of 37 to 46 wt.%, and an entire Sn content of 0.9 to 7 wt.%. Brasses of the other two types have an apparent Zn content of 37 to 44 wt.%.
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