Abstract: A hollow fiber membrane cartridge comprises a bundle of a plurality of hollow fiber membranes, both ends of which are fixed by adhesion, a cartridge head fixed at the periphery of the bundle at one end so as not to permit the passage of liquid either in or out, and a bottom ring fixed at the periphery of the bundle at the other end so as not to permit the passage of liquid either in or out, wherein the cartridge head and the bottom ring are not connected and fixed but are separated, the hollow portion at the end of each hollow fiber membrane on the cartridge head side is open, the hollow portion at the end of each hollow fiber membrane on the bottom ring side is sealed, and a plurality of through-holes are provided in an adhesion and fixation layer on the bottom ring side.

Abstract: The present invention relates to a joint structure between a filtration apparatus and a filtration membrane module, which is characterized in that a cap with a pipe is disposed on at least one end of a filtration membrane module using a cap nut capable of being screwed into a thread groove formed on the outer periphery of the end thereof, said pipe of the cap being inserted into and pressed against one end of a joint capable of controlling connection length at both ends, and a branch pipe of a header pipe of the filtration apparatus being inserted into and pressed against the other end of said joint. According to the present invention, there can be obtained such a joint structure that requires fewer components for connection, has a simple construction at connections, and does not cause any leakage.

Abstract: A method and apparatus for purifying an aqueous suspension comprising feeding an aqueous suspension containing fine particles comprising an inorganic component from the outer surface of a wavy hollow fiber membrane having an outer diameter of from 0.5 to 3.1 mm to filter, followed by physical wash of the hollow fiber membrane. The purifying method can reduce the damage of the membrane outer surface during the physical wash step, prevent open pores on the surface from covering and achieve stable filtration. The hollow fiber membrane bundle can be produced by having a pulsation flow contacted with the hollow fiber material being extruded from the double spinning nozzle under specific conditions and cooling and solidifying or coagulating it while shaking.

Abstract: A method and apparatus for purifying an aqueous suspension comprising feeding an aqueous suspension containing fine particles comprising an inorganic component from the outer surface of a wavy hollow fiber membrane having an outer diameter of from 0.5 to 3.1 mm to filter, followed by physical wash of the hollow fiber membrane. The purifying method can reduce the damage of the membrane outer surface during the physical wash step, prevent open pores on the surface from covering and achieve stable filtration. The hollow fiber membrane bundle can be produced by having a pulsation flow contacted with the hollow fiber material being extruded from the double spinning nozzle under specific conditions and cooling and solidifying or coagulating it while shaking.

Abstract: A hollow fiber membrane module comprising a module case and a hollow fiber membrane bundle comprising a plurality of hollow fiber membranes, at least one end of the bundle being bonded to and fixed on the module case, wherein the bonding portions of the hollow fiber membrane bundle and the module case comprise a silicone type resin and in at least one of the bonding portions, a reinforcing rib for reinforcing the bonding portions is directly fixed on the module case. According to the hollow fiber membrane module of this invention, the membrane filtration treatment of water containing ozone over a long period of time and the repeating washing with water containing ozone are made possible.

Abstract: A method and apparatus for purifying an aqueous suspension comprising feeding an aqueous suspension containing fine particles comprising an inorganic component from the outer surface of a wavy hollow fiber membrane having an outer diameter of from 0.5 to 3.1 mm to filter, followed by physical wash of the hollow fiber membrane. The purifying method can reduce the damage of the membrane outer surface during the physical wash step, prevent open pores on the surface from covering and achieve stable filtration. The hollow fiber membrane bundle can be produced by having a pulsation flow contacted with the hollow fiber material being extruded from the double spinning nozzle under specific conditions and cooling and solidifying or coagulating it while shaking.

Abstract: A photosensitive composition comprising:(a) a polymer(b) 1 to 20% by weight, based on the weight of polymer (a), of a compound having a terminal ethylenically unsaturated group;(c) 0.1 to 20% by weight, based on the weight of polymer (a), of an oxime ester compound(d) 0.01 to 10% by weight, based on the weight of polymer (a), of a coumarin compound having a wave length of the absorption peak of 330 to 550 nm; has high photosensitivity to an actinic light of a wave length of 400 to 500 nm and is capable of forming heat-resistant images, patterns or films.

Abstract: A tetraazaannulene cobalt complex compound having the general formula (I); ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each independently is a hydrogen atom, a C.sub.1-8 alkoxy group or a C.sub.1-8 alkyl group but in case of one of R.sub.1, R.sub.2 and R.sub.3 being a hydrogen atom the other two groups are not hydrogen atoms at the same time, and when R.sub.1 is a methyl group R.sub.2 and R.sub.3 are not hydrogen atoms at the same time.