Abstract: The siloxane compounds represented by the following formula: SiOa(OH)b(OR1)c(OR2)d wherein 1.0≦a≦1.6, 0≦b<0.3, 0.2≦c≦2.0, 0≦d≦1.4, 2a+b+c+d=4, R1 is a methyl or ethyl group, and R2 is an organic group different from R1.

Abstract: A polyalkoxysiloxane of the following rational formula: SiOa(OR)b(OH)c wherein R is a C1-4 alkyl group, a=0.86 to 1.30, b=2.18 to 1.30, and c≦0.10.

Abstract: The following polyalkoxysiloxane compounds (A) and (B): (A): polyalkoxysiloxane compounds represented by the rational formula SiOx(OR1)y(OR2)z, wherein z/(y+z)=0.05 to 0.5 by mole, 0.5≦x≦1.5, 2x+y+z=4, R1 is a methyl group and/or an ethyl group, and R2 is an organic group different from R1; (B): polyalkoxysiloxane compounds represented by the rational formula SiOx(OR1)y(OR2)z, wherein 0.5≦x≦1.5, 2x+y+z=4, R1 is a methyl group and/or an ethyl group, and R2 is at least one of the alkyl groups having 3 to 4 carbon atoms; are provided. These polyalkoxysiloxane compounds can be used advantageously for the coat-forming compositions or aqueous emulsion-forming compositions.

Abstract: A method of separating a liquid by pervaporation, which includes purifying a liquid to be treated by at least one pervaporation membrane module unit providing a supply line connected to the pervaporation membrane module unit and supplying the liquid to be treated to the membrane module unit, utilizing a withdrawing line for withdrawing the permeated fluid from the membrane module unit and a withdrawing line for withdrawing the non-permeated liquid, wherein the supply line is provided with a pressure pump for transporting the liquid and a heater, and providing the final withdrawing line for the non-permeated liquid with a pressure regulating valve.

Abstract: A carbon fiber-reinforced hydraulic composite material having excellent mechanical strength, workability, and freezing-and-thawing resistance, wherein chopped carbon fibers having a monofilament tensile strength of from 140 kg/mm.sup.2 to 270 kg/mm.sup.2, and a monofilament diameter of from 15 .mu.m to 30 .mu.m are blended as the carbon fibers at a ratio of from 1% to 4% by volume with respect to the entire composite material to bring a flow index of the composite material before its hardening to 120 mm or above.

Abstract: The present invention relates to a process for preparing a 2-(1-hydroxyalkyl)cyclohexanone and/or a 2-alkylidene cyclohexanone. According to the present invention, the reaction of cyclohexanone with an aliphatic aldehyde is conducted in a heterogeneous system of an oil-in-water emulsion, whereby it is possible to obtain the 2-(1-hydroxyalkyl)cyclohexanone and/or the 2-alkylidene cyclohexanone in high selectivity.

Abstract: A process for preparing 2,3-dihydro-7-aminobenzofurans by reaction between 2,3-dihydro-7-halobenzofurans and ammonia in the presence of a copper catalyst, is described. The 2,3-dihydro-7-aminobenzofurans are useful as intermediates for insecticides.

Abstract: The air flow rate of a fan driven by a motor controlled by an adjustable speed control equipment is automatically controlled by stopping the adjustable speed control equipment in response to a fault signal therefrom during operation with an inlet vane installed upstream of the fan in fully open state, simultaneously throttling the inlet vane at a preset speed to a degree of opening appropriate for the load by means of a control circuit, and, after a period for reduction of residual voltage of the motor, changing over to operation of the fan by a commercial power supply thereby to shift to control by the degree of opening of the inlet vane.