Abstract: A bis(1,1,3,3-tetramethylbutyl)phosphinic acid compound represented by the formula (1) and an extracting agent using the same for separating Co from an aged electroless Ni plating solution.

Abstract: A highly pure monoalkylphosphine which is useful as a starting material for producing a compound semiconductor, and a method for producing same in high yield are provided. A highly pure monoalkylphosphine represented by the general formula RPH.sub.2 (wherein R is an alkyl group having 1 to 8 carbon atoms) has a purity of not less than five nines, and is substantially free of sulfur and silica. In the method of producing said highly pure monoalkylphosphine, anhydrous hydrofluoric acid is used as a catalyst for a reaction between phosphine and an alkene, and the reaction is carried out in the presence of an organic solvent having a boiling point higher than that of the resulting monoalkylphosphine; the resulting reaction mixture is contacted with an alkali solution so that the remaining catalyst is removed into an aqueous phase in the form of a fluoride salt; next, the obtained reaction mixture is contacted with an alkali hydride and the impurities are removed, then distillation is carried out.

Abstract: A lithium cobaltate based positive electrode-active material for a lithium secondary cell consisting of lithium cobaltate (LiCoO.sub.2) powder having particle properties of an n-value of at least 2.0 in Rosine-Rammler's distribution (R-.lambda.). According to the present invention, it is possible to provide a lithium cobaltate based positive electrode-active material which is excellent in discharge capacity and capacity holding rate and gives high energy density, suitable for a lithium secondary cell.

Abstract: A lithium cobaltate based positive electrode-active material for a lithium secondary cell consisting of lithium cobaltate (LiCoO.sub.2) having 0.5% by weight or less of free cobalt oxide (Co.sub.3 0.sub.4). According to the present invention, it is possible to provide a lithium cobaltate based positive electrode-active material which has excellent discharge capacity and capacity holding rate and gives a high energy density, suitable for a lithium secondary cell.

Abstract: A bis(1,1,3,3-tetramethylbutyl)phosphinic acid compound represented by the formula (1) and an extracting agent using the same for separating Co from an aged electroless Ni plating solution. A di(1,1,3,3-tetramethylbutyl)phosphine is produced by carrying out a reaction between phosphine and trimethylpentene in the presence of an organic solvent and a catalyst, then said phosphine is reacted with an oxidizing agent or sulfur to obtain the compound (1): ##STR1## (wherein X.sup.1 and X.sup.2 are O or S).

Abstract: An air cleaning filter having a carrier made of activated carbon fibers in the form of a web which supports at least one kind of chemical agent selected from the group consisting of (a) an alkali agent selected from a hydroxide or carbonate or an alkali metal, (b) an acidifying agent selected from acid aluminum phosphate or phosphoric acid, and (c) an oxidizing agent composed of two compounds, i.e. active manganese dioxide resulting from an alkali permanganate and an alkali iodate, or which supports combined chemicals of (a) the alkali agent and (c) the oxidizing agent, or combined chemicals of (b) the acidifying agent and (c) the oxidizing agent, wherein one or both surfaces of the web are covered with a nonwoven fabric to make an integrated filter.

Abstract: A treating agent for cellulosic textile materials includes a water-soluble phosphonium salt of phosphorus-containing oxoacid and polycarboxylic acid as active ingredients, and a process of treating cellulosic textile materials uses the treating agent. The treating agent eliminates the necessity of the use of a substance releasing formaldehyde during wash and wear treatment and enables non-formaldehyde wash and wear treatment, and the cellulosic textile material treated by the treating agent is completely free from formaldehyde, retains enough of the strength thereof, and undergoes neither discoloration nor fibrillation.

Abstract: A method of producing a bis(2-carboxyethyl)-alkyl phosphine oxide represented by the following general formula (1) is disclosed. ##STR1## The method comprises the following Steps 1-4: step 1 wherein phosphine is reacted with acrylonitrile to produce bis(2-cyanoethyl)phosphine and then, in step 2, reacted with an alkene to produce a bis(2-cyanoethyl)alkyl phosphine, and in step 3, reacted with an oxidizing agent to produce a bis(2-cyanoethyl)alkyl phosphine oxide, and in step 4, said bis(2-cyanoethyl)alkyl phosphine oxide is reacted with water or a lower alcohol to give a bis(2-carboxyethyl)alkyl phosphine oxide or a derivative thereof.

Abstract: A bifunctional alkyl phosphine oxide which is represented by the following general formula (1), ##STR1## wherein R.sup.1 represents tert-butyl or 1,1,3,3-tetramethylbutyl, and a production method thereof. This organophosphorus compound is useful a wide variety of fields including a flame retardant, antistatic additive, antibacterial agent, dyeing-improving agent, resin modifier, stain-proofing agent, and rust preventives. This compound can be produced industrially advantageously.

Abstract: A method of preparing diarylchlorophosphate comprising the step of reacting alkyldiarylphosphate represented by formula (1) and thionyl chloride in the presence of a catalyst:R.sup.1 O--P(O)(OAr).sub.2 (1)(where R.sup.1 represents an alkyl group having 1 to 4 carbon atoms, and Ar represents a substituted or unsubstituted aryl group). According to the invention there is provided a method of preparing diarylchlorophosphate having a high purity at a high yield, which can be advantageously used in industrial applications.

Abstract: A monoalkylphosphine represented by the following formula (1): ##STR1## wherein m indicates 1 or 2, and n indicates an integer of 0 to 2. The monoalkylphosphine can effectively be obtained by reaction between phosphine and an alkene in the presence of an organic solvent and an anhydrous alkanesulfonic acid catalyst.

Abstract: An air purifying agent comprising a carrier which contains short pulp fiber, on which one or more chemical components selected from the group consisting of acids, alkalis, oxidizing agents, reducing agents and antimicrobial components are supported. According to the present invention, an air purifying agent which is low in weight, is safe to handle and exhibits excellent effect in removing contaminated gases containing low concentrations of contaminants.

Abstract: A cement additive for inhibiting concrete deterioration contains as an effective component a powder mixture of an inorganic cation exchanger, such as a highly calcium-substituted zeolite, and an inorganic anion exchanger, such as hydrocalumite. The cement additive inhibits the alkali-aggregate reaction and the corrosion of reinforcing steel, thereby protecting concrete constructions from deterioration.

Abstract: An antibacterial agent comprising as an active ingredient a vinylbenzyl phosphonium salt of the general formula (I), ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represent a hydrogen atom, a linear or branched alkyl group having 1 to 18 carbon atoms, an aryl group, a hydroxyl group, or an alkoxyl-substituted alkyl, aryl or aralkyl group, and X.sup.- is an anion; and/or a phosphonium salt polymer in which the vinylbenzyl phosphonium salt, a monomer, is polymerized.

Abstract: The method for preparing a monoalkylphosphine of high purity comprises reacting phosphine and an alkene in the presence of an anhydrous alkanesulfonic acid as a catalyst in a solvent having a boiling point higher than that of the monoalkylphosphine produced. The resulting monoalkylphosphine is brought into contact with an alkali solution to remove the catalyst, which is a sulfur atom-containing compound, remaining in the solution. The reaction solution from which the remaining catalyst is removed is then brought into contact with alkali metal hydrides or alkaline earth metal hydrides to eliminate any moisture remaining in the reaction solution. The alkali metal hydride is preferably sodium hydride or lithium aluminum hydride, while the alkaline earth metal hydride is preferably calcium hydride.

Abstract: An air purifying agent comprising a carbonaceous carrier and activated manganese dioxide and iodate supported thereon. According to the present invention, there can be provided an air purifying agent which is safe to handle and exhibits sufficient effect for removing contaminated gases.

Abstract: o-Methoxy benzoic acid is produced by reacting chlorobenzoic acids having at least one chlorine atom at least at the ortho position with lower alcohol in the presence of a copper salt and a lower alkyl as a catalyst under moderate reaction conditions. o-Methoxy benzoic acid is useful as an intermediate for pharmaceutical, agricultural chemicals, and the like.

Abstract: A method for improving the characteristics of fused slag material is disclosed. This improved method results in a fused slag having resistance against pulverization at the cooling process or generation of yellowish turbid water due to contact of slag lumps with rain water, this method characterized by forming a slag treatment material by rough crushing a substantially dehydrated heat-treated material containing boron, and adding that slag treatment material to molten slag.

Abstract: The present invention discloses an agent and a method of treating wool fibers using the agent which contains as an active ingredient, one or more water-soluble organic phosphine compounds selected from the group comprising hydroxyalkylphosphines expressed by the following formula: ##STR1## (wherein R.sup.1 denotes a hydroxyalkyl group having 1 to 10 carbon atoms and R.sup.2 and R.sup.3 each denotes an alkyl or hydroxyalkyl group having 1 to 10 carbon atoms) and derivatives thereof such as alkylene oxide addition products, phosphonium salts and quaternary phosphonium compounds thereof.

Abstract: A method for improving the characteristics of fused slag material is disclosed. This improved method results in a fused slag having resistance against pulverization at the cooling process for generation of yellowish turbid water due to contact of slag lumps with rain water, this method characterized by forming a slag treatment material by rough crushing a substantially dehydrated heat-treated material containing boron, and adding that slag treatment material to molten slag.