Abstract: A method and apparatus detect a noise disappearance of instruments, etc. in various instrumentations in a chemical plant or the like. Detection values which are outputs from a detector (1) are input into a data store (3) via a data collector (2). Inputs to a processor (4) are a detection value (Sold) at a previous point and time from the data storer (3) and further a current detection value serving as a newest value (Snew) from the data collector (2). In the processor (4), an absolute difference between the newest value (Snew) and the previous value (Sold) is calculated. When this difference is smaller than a preset value, a count number (C) of a counter (5) is incremented, whereas when this difference is larger than the preset value, the count number (C) is cleared. When the count number from the counter (5) exceeds a predetermined threshold value, this is regarded the occurrence of a noise disappearance, and a trigger signal (T) for actuating a notifier (7) is output from a limiter (6).

Abstract: The present invention relates a method for reactivating or regenerating the methane oxidizability of a methane-utilizing bacteria which have partly or wholly lost its methane oxidizability by culturing said methane-utilizing bacteria in a specified condition, and further relates to a method for continuous production of oxides by bringing a methane-utilizing bacteria in contact with alkanes, alkenes or cyclic compounds.

Abstract: The present invention relates to a process for producing glycol monoesters by reacting carboxylic acid, olefin and oxygen in the presence of a catalyst containing (A) a palladium component, (B) an oxygen-containing nitrogen compound, and (C) a metal halide in the specified ratio of (A), (B), (C).According to the present invention, the regeneration of the catalyst through reduction is easy and the catalyst of high activity can be used repeatedly.

Abstract: The present invention relates to a process for preparing aluminoxane which comprises reacting an organoaluminum compound and water in a solvent system containing solvent having a higher boiling point than that of the organoaluminum compound, or reacting an organoaluminum compound and water, and then adding a solvent system containing the solvent having a higher boiling point than that of the organoaluminum compound to the reaction mixture; and thereafter condensing the resulting reaction mixture under atmospheric pressure or reduced pressure.

Abstract: A process for production of styrene polymers is disclosed, comprising polymerizing styrene monomers by the use of a catalyst comprising (a) a titanium compound and (b) a contact product of an organoaluminum compound and a condensing agent, and further in the presence of hydrogen. The styrene polymers produced by the present process have a stereo structure that substituent groups are mainly in the syndiotactic configuration. Thus the styrene polymers have high heat resistance and high solvent resistance as compared with atactic polystyrene commonly used and are useful as materials for production of articles for which high heat resistance and high solvent resistance are required.

Abstract: The novel compound provided by the invention is a higher carboxylic acid triester of adamantane triol such as adamantane-1,3,5-triol tricaprylate not known in the prior art. The compound has a high kinematic viscosity at elevated temperatures despite the low pour point and has high thermal stability in an oxidizing atmosphere so that it is useful as an ingredient of a high-performance lubricating oil.

Abstract: The liquid-crystalline polymeric composition of the invention comprises (A) a non-liquid-crystalline polymeric compound and (B) a low-molecular liquid-crystalline compound each having a proton donor and/or a proton acceptor in the molecular structure and the low-molecular compound has a chiral smectic C phase. By virtue of these functional groups forming hydrogen bonds between the components, the liquid-crystalline polymeric composition of the invention is not a mere blend of the components liable to cause phase separation but is imparted with greatly increased stability and uniformity of the blend as well as responsivity of high speed.

Abstract: A process for producing styrene-based polymers having mainly syndiotactic configuration in the presence of a catalyst comprising (A) a titanium compound and (B) a contact product of a methyl group-containing organoaluminum compound and water, wherein the contact product (B) has a high magnetic field component of not more than 50% in the methyl proton signal region due to an aluminum-methyl group (Al--CH.sub.3) bond as determined by the proton nuclear magnetic resonance absorption method.According to this process, styrene-based polymers having mainly syndiotactic configuration can be efficiently and economically produced.

Abstract: Disclosed is a novel polymer of this invention which comprises having a recurring unit represented by the formula: ##STR1## and having a reduced viscosity (.eta.sp/c) of 0.2 dl/g or more at 60.degree. C. in a solution of a concentration of 0.2 g/dl in p-chlorophenol as a solvent, a method for preparing the same which comprises reacting a dihalogenobenzonitrile represented by the formula: ##STR2## wherein X represents a halogen atom, with an alkali metal salt of resorcin represented by the formula: ##STR3## wherein M represents an alkali metal, in the presence of a solvent; and then treating the reaction product obtained by water or alcohol, and molding materials and molded products employing the polycyanoaryl ether.

Abstract: The present invention relates to a poly(cyanoarylether)based resin composition comprising 100 parts by weight of poly(cyanoarylether) having a repeating unit represented by the formula: ##STR1## (wherein Ar is ##STR2## as a main constitutional component and 0.01 to 3 parts by weight of at least one crystallization nucleating agent selected from the group consisting of talc, mica and carbon black each having a particle diameter of not more than 3 .mu.m.In the composition of the present invention, the rate of crystallization of poly(cyanoarylether) is greatly improved. Thus, the productivity of molding can be increased. Furthermore, the composition of the present invention can provide moldings having excellent heat resistance without annealing.

Abstract: The present invention provides a lubricating oil composition comprising 97 to 60% by weight of mineral oil and 3 to 40% by weight of polyester, said mineral oil having a kinematic viscosity at 100.degree. C. of 2 to 50 centistokes, a pour point of -5.degree. to -30.degree. C., a viscosity index of not less than 80 and % C.sub.A of not more than 3. This lubricating oil composition is suitably used for lubrication of parts including a wet brake and a wet clutch, such as automatic transmissions and tractors.The lubricating oil composition of the present invention has a suitable viscosity at high temperatures and further is low in low temperature viscosity.Furthermore the lubricating oil composition of the present invention is excellent in friction characteristics, oxidation stability and also in seal rubber compatibility.

Abstract: The present invention relates to a process for preparing triethylenediamines which comprises contacting an amine compound having, in the molecule, a group represented by the general formula: ##STR1## (wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms and X is nitrogen or oxygen) with a catalyst comprising crystalline metallosilicate having a silica (SiO.sub.2)/metal oxide (M.sub.2 O.sub.3) molar ratio of 12/1 or more under a pressure of not less than 4 kg/cm.sup.2 (absolute pressure).According to the present invention, the conversion of the amine compound can be greatly increased and thus the desired triethylenediamines can be produced in a high yield.

Abstract: The novel compound provided by the invention is a higher carboxylic acid triester of adamantane triol such as adamamtane-1,3,5-triol tricaprylate not known in the prior art. The compound has a high kinematic viscosity at elevated temperatures despite the low pour point and has high thermal stability in an oxidizing atmosphere so that it is useful as an ingredient of a high-performance lubricating oil.

Abstract: The present invention provides a lubricating oil composition comprising 97 to 60% by weight of mineral oil and 3 to 40% by weight of polyester, said mineral oil having a kinematic viscosity of 100.degree. C. of 2 to 50 centistokes, a pour point (as determined by JIS K-2269) of not more than -30.degree. C., and a viscosity index (as determined by JIS K-2283) of not less than 70. This lubricating oil composition is suitably, used for lubrication of parts including a wet brake and a wet clutch, such as automatic transmissions and tractors.The lubricating oil composition of the present invention has a suitable viscosity at high temperatures and further is low in low temperature viscosity.Furthermore the lubricating oil composition of the present invention is excellent in friction characteristics, oxidation stability and also in seal rubber compatibility.

Abstract: An ionomer resin having a weight-average molecular weight of at least 5,000 and containing three specific repeating units as the primary components, said units being arranged randomly and linearly with the total proportion of the two units being 0.001 to 45 mol %, is obtained by copolymerizing ethylene with an unsaturated carboxylic acid in the presence of a Lewis acid, using as a catalyst a chromium compound and a compound of a metal of Groups I to V in the periodic table and permitting a compound of a metal of Group I, II, III, IVA or VIII in the periodic table to react with the resulting copolymer. When an unsaturated carboxylic ester is used, the resulting copolymer is hydrolyzed or thermally decomposed.

Abstract: Disclosed is a lubricating oil composition both for lubrication of sliding surface of machine tools and for lubrication of working part of machine tools which is free from the conventional problems. This composition comprises a reaction product of a dibasic acid of 16-24 carbon atoms with a piperazine compound, a lubricating oil, an emulsifier and, if necessary, an extreme pressure agent and/or an oiliness agent.

Abstract: The triazine derivatives of the present invention are roughly classified into the compounds of the general formulas [I] and [II] and further classified into 4 types depending on the kind of the Z in the general formulas and the position of substitution of the aminoalkyl group on the benzo(thia)furanyl group. Furthermore, these triazine derivatives are useful as a herbicide or, in particular, as a herbicide for paddy rice plants with greater effectiveness and less injury by chemicals than known ones. In addition, they have a wide herbicidal spectrum and exhibit remarkable effects against various kinds of weeds.

Abstract: The present invention provides a selective gas permeation membrane in which the inner walls of pores in a porous substrated are coated with organosiloxane polymer and voids are formed in the central portion of the pores. The selective gas permeation membrane is produced by impregnating the porous substrate with the siloxane polymer followed by a crosslinking treatment to such an extent that the penetration degree of the crosslinked organosiloxane polymer reaches a range from 20 to 150 and then removing the crosslinked organosiloxane polymer undergoing insufficient crosslinking by means of a solvent.

Abstract: The present invention relates to a trifluoromethanesulfonamide derivative represented by the general formula given below, a herbicide with the derivative as the active ingredient and a method for the preparation of the derivative. ##STR1## [In the formula, X is a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms or a haloalkyl group having 1 to 4 carbon atoms, n is 1, 2 or 3 and A is --O--CR.sup.3 R.sup.4 --, --S--CR.sup.3 R.sup.4 --, --SO--CR.sup.3 R.sup.4 --, --SO.sub.2 --CR.sup.3 R.sup.4 -- or --SO.sub.2 --NR.sup.3 --. And, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.]These compounds are prepared depending on A in the above given general formula by the reaction of an amine derivative and a trifluoromethansulfonyl halide or trifluoromethanesulfonic anhydride or by the oxidation of a thiochroman ring-containing trifluoromethanesulfonamide derivative.

Abstract: Sorbic acid can be prepared by the activity of a specific microorganism on 2,4-hexadienal. This method can be performed under mild conditions and, different from organo-chemical methods, is advantageous because no by-products are formed.