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AssigneeNippon Shokubai Co., Ltd.
InventorsYoshihiko Masuda, Masazumi Sasabe, Seiji Kato, Atsushi Tachibana, Kenji Kadonaga, Shigeru Oka
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An object of the present invention is to provide a waste solution solidifying agent which can solidify a waste solution, particularly, a waste solution containing blood or body fluid at a low cost, uniformly, and in a short time; in particular, to provide a waste solution solidifying agent which can solidify a waste solution uniformly and in a short time in a vertically oriented waste solution equipment. As a means of achieving this object, a waste solution solidifying agent of the present invention is a particulate treating agent used in a method of treating a waste solution which solidifies a waste solution into a gel by placing a treating agent in a waste solution, and is characterized in that said agent contains, as an essential component, a water-absorbent resin having a crosslinked structure obtained by polymerizing a water-soluble ethylenic unsaturated monomer and, when flowing-placed at once into a 0.90 mass % aqueous sodium chloride solution, 20 to 95 mass % of the agent is floated, and 80 to 5 mass % is settled. And a process for preparing a waste solution solidifying agent of the present invention is a process for preparing a particulate waste solution solidifying agent containing, as an essential component, a water-absorbent resin having a crosslinked structure obtained by polymerizing a water-soluble ethylenic unsaturated monomer, and comprises a step of mixing a hydrophobic substance having a methanol index of 20 or more after polymerization.
A waste solution solidifying agent, which is a particulate treating agent used in a method of treating a waste solution by placing the treating agent into a waste solution to solidify the waste solution into a gel, said waste solution solidifying agent comprising, as an essential component, a water-absorbent resin having a crosslinked structure obtained by polymerizing a water-soluble ethylenic unsaturated monomer, wherein when placed in a 0.90 mass % aqueous sodium chloride solution at once, 20 to 95 mass % of the agent is floated, and 80 to 5 mass % of the agent is settled, provided that floating and settling are defined by the state at one minute after placement of 40 g of a particulate waste solution solidifying agent at once in a measuring cylinder having an effective volume of 1000 ml (inner diameter 66 mm) which has a vertical axial direction and contains 1000 ml of a 0.90 mass % aqueous sodium chloride solution at 25° C.
A process for preparing a waste solution solidifying agent, which is a process for preparing a particulate waste solution solidifying agent containing, as an essential component, a water-absorbent resin particle having a crosslinked structure obtained by polymerizing a water-soluble ethylenic unsaturated monomer, said process comprising a step of mixing a non-volatile hydrophobic substance having the following methanol index of 20 or more after polymerization, wherein:
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