Abstract: A method for preparing a poly-&agr;-hydroxyacrylate aqueous solution, which comprises reacting a polylactone compound corresponding to poly-&agr;-hydroxyacrylic acid (hereinafter referred to as “PLAC”) with an alkali, wherein the alkali is added dividedly.

Abstract: A sterilizing composition for a food-packing material which comprises the following components (1) and (2): (1) an aqueous solution containing peracetic acid, hydrogen peroxide and acetic acid, and (2) a peracetic acid sterilizing power-improving agent comprising one or two or more compounds selected from the group consisting of esters obtained from a C2-C8 aliphatic acid and a C2-C8 aliphatic alcohol, C2-C8 aliphatic alcohols and aliphatic alcohols having a benzene ring.

Abstract: A sterilizing composition for a food-packing material which comprises the following components (1) and (2):

Abstract: A method for preparing a poly-&agr;-hydroxyacrylate aqueous solution, which comprises reacting a polylactone compound corresponding to poly-&agr;-hydroxyacrylic acid (hereinafter referred to as “PLAC”) with an alkali, wherein the alkali is added dividedly.

Abstract: A stabilizing agent for peroxide-bleaching procedure includes (A) a component including a homopolymer or copolymer of .alpha.-hydroxyacrylic acid or water soluble salt or polylactone of the homo- or co-polymer, (B) a component including a homopolymer or copolymer of acrylic acid, methacrylic acid and/or maleic acid and water-soluble salt of the homo- or co-polymer, (C) a component including DTPA, TTHA or water-soluble salt thereof and optionally (D) a component including a water-soluble inorganic Mg salt and is used to pretreat a fiber material with a pretreating liquid containing the stabilizing agent before bleaching with peroxide, or to bleach the fiber material by a bleaching liquid containing a peroxide bleaching agent and the stabilizing agent.

Abstract: An oxidizing composition comprises an aqueous solution of peracetic acid, hydrogen peroxide and acetic acid and a fragrant component uniformly solubilized in the peracetic acid-containing aqueous solution by aid of a surfactant component, the fragrant component comprising at least one fragrance material which is chemically stable in the presence of peroxide compounds and effectively masks the irritating odor of peracetic acid and acetic acid.

Abstract: A stable sodium percarbonate having excellent stability when incorporated into a bleaching agent composition or a detergent composition, particularly a zeolite-containing detergent composition. The stable sodium percarbonate is produced by a process which comprises a step of treating sodium percarbonate on the surface with at least one coating agent selected from the group (A) consisting of boric acids, borates and alkali metal silicates and at least one coating agent selected from the group (B) consisting of carbonates, hydrogencarbonates and sulfates, and at least one coating agent selected from the group consisting of coating agents belonging to groups (A) and (B) being present in the form of an aqueous coating slurry thereof.

Abstract: An .alpha.-olefin oxide is produced with an enhanced reaction selectivity by a method in which an .alpha.-olefin having 6 to 30 carbon atoms is epoxidized in an aqueous solution containing hydrogen peroxide, acetic acid, an acid catalyst, for example, sulfuric acid, and a side reaction-inhibiting agent consisting of a water-soluble neutral salt, for example, sodium sulfate, in an amount of 2 to 30% based on the total weight of the aqueous solution, by an in-situ method, while maintaining the pH of the aqueous solution at a level of 0 to 1, and the resultant reaction product is collected.

Abstract: A method of bleaching a cellulosic fiber material with hydrogen peroxide, comprising:(a) impregnating a cellulosic fiber material with an aqueous bleaching solution containing hydrogen peroxide and a stabilizer comprising:(i) 1 to 100 parts by weight of at least one hydroxyacrylic acid polymer selected from the group consisting of poly-.alpha.-hydroxyacrylic acids, and salts thereof and polylactone corresponding thereto; and(ii) 1 to 50 parts by weight of at least one organic phosphate acid compound selected from the group consisting of methylene,1,1-diphosphonic acid, ethylidene-1,1-diphosphonic acid, butylidene-1,1-disphosphonic acid, 1-hydroxyethylidene-1,1-diphosphonic acid, 1-hydroxypropyl-idene-1,1-diphosphonic acid, amino-tri(methylenephosphonic acid), hexamethylene diamine tetra(methylenephosphonic acid), triethylenetetramine hexa(methylenephosphonic acid), and salts of the above-mentioned organic phosphonic acids, and(b) heating the impregnated cellulosic fiber material with steam.

Abstract: An adduct having the formula: 4Na.sub.2 SO.sub.4. 2H.sub.2 O.sub.2. NaCl, is prepared by reacting sodium sulfate with hydrogen peroxide in an aqueous solution, in the presence of sodium chloride in the reaction system.

Abstract: A bleaching composition comprising a hydrogen peroxide adduct having the formula:4Na.sub.2 SO.sub.4.sup.. 2H.sub.2 O.sub.2.sup.. NaCland an activating agent.

Abstract: A neutral detergent composition containing a bleaching agent having the formula:4Na.sub.2 SO.sub.4.2H.sub.2 O.sub.2.

Abstract: An optically active enantiomer of tartaric acid or a salt thereof is racemized by mixing meso-tartaric acid or a salt thereof with a solution of an optically active enantiomer of tartaric acid or a salt thereof in a molar ratio of 0.2 - 0.5 and thereafter heating the mixture.