Abstract: A polyester polyol obtained by reacting a dicarboxylic acid component (A) with a diol component (B). The dicarboxylic acid component (A) contains a dicarboxylic acid (a1) represented by the following general formula (I) and a dicarboxylic acid (a2) represented by the following general formula (II). A content of the dicarboxylic acid (a2) is 0.02 to 3.00% by mass in 100% by mass of the total amount of the dicarboxylic acid component (A): R1, R2, R4, and R5 each independently represent a divalent hydrocarbon group having 1 to 3 carbon atoms, and R3 and R6 each independently represent a monovalent hydrocarbon group having 1 to 3 carbon atoms.

Abstract: The present invention relates to a method for producing a hydrocarbon, including a step (Y) of converting a reaction product of at least one sulfur compound selected from the group consisting of hydrogen sulfide and a compound containing a —SH group which are contained in a hydrocarbon with an ?,?-unsaturated aldehyde compound into a water-soluble compound in the presence of water, and a step (Z) of separating oil and water.

Abstract: Provided is a composition for removing a sulfur-containing compound contained in at least one of a liquid and gas, the sulfur-containing compound being at least one selected from the group consisting of hydrogen sulfide and an —SH group-containing compound, the composition containing an aldehyde and an amine whose conjugate acid has a pKa value of 11.3 or higher in water at 25° C.

Abstract: Provided is a composition for removal of a sulfur-containing compound in a liquid or gas, wherein the sulfur-containing compound is at least one selected from the group consisting of hydrogen sulfide and a compound containing an —SH group, and the composition contains an aldehyde and a polyvalent amine represented by the general formula (1).

Abstract: Provided is a composition for removing a sulfur-containing compound present in liquid or vapor, the sulfur-containing compound being hydrogen sulfide, an —SH group-containing compound or a mixture thereof, the composition containing an ?,?-unsaturated aldehyde represented by the following general formula (1) as an active ingredient; wherein R1 and R2 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms, or are connected to each other to represent an alkylene group having 2 to 6 carbon atoms; and R3 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, or is connected to R1 to represent an alkylene group having 2 to 6 carbon atoms.

Abstract: The present invention relates to a method for producing a hydrocarbon, including a step (Y) of converting a reaction product of at least one sulfur compound selected from the group consisting of hydrogen sulfide and a compound containing a —SH group which are contained in a hydrocarbon with an ?,?-unsaturated aldehyde compound into a water-soluble compound in the presence of water, and a step (Z) of separating oil and water.

Abstract: Provided is a composition for removing a sulfur-containing compound contained in at least one of a liquid and gas, the sulfur-containing compound being at least one selected from the group consisting of hydrogen sulfide and an —SH group-containing compound, the composition containing an aldehyde and an amine whose conjugate acid has a pKa value of 11.3 or higher in water at 25° C.

Abstract: An apparatus for removing a sulfur-containing compound, including: a sulfur-containing compound removing part of bringing a gas to be treated containing a sulfur-containing compound into contact with an oil-soluble sulfur-containing compound absorbing agent, so as to remove the sulfur-containing compound; and a mixing part of mixing a sulfur-containing compound absorbed agent resulted from having the sulfur-containing compound absorbed to the sulfur-containing compound absorbing agent, and a non-aqueous liquid.

Abstract: A sulfur-containing organosilicon compound represented by the following general formula (I) or (II): wherein R1 to R3 each independently represent a chlorine atom, a methoxy group, or an ethoxy group; R4 represents an alkyl group having 1 to 10 carbon atoms; R5 represents an alkylene group having 1 to 10 carbon atoms; and n represents an integer of 2 to 6.

Abstract: There is provided a composition containing one or more basic compounds selected from the group consisting of tertiary amines, nitrogen-containing heterocyclic aromatic compounds, alkali metal carbonate salts, alkaline earth metal carbonate salts and alkali metal hydrogencarbonate salts, and a homoallyl halide.

Abstract: A method for suppressing metal corrosion attributable to a compound having an SH structure contained in a hydrocarbon, including adding at least one aldehyde selected from the group consisting of a monoaldehyde having 4 or more carbon atoms and a dialdehyde having 3 or more carbon atoms, to the hydrocarbon.

Abstract: A method of producing 1,5-pentanedial having an alkyl group at the 3-position, including a step of hydroformylating an aldehyde compound represented by the following general formula (1): wherein R1 represents an alkyl group having from 1 to 6 carbon atoms.

Abstract: Provided is a composition for removal of a sulfur-containing compound in a liquid or gas, wherein the sulfur-containing compound is at least one selected from the group consisting of hydrogen sulfide and a compound containing an —SH group, and the composition contains an aldehyde and a polyvalent amine represented by the general formula (1).

Abstract: Provided is a composition for removing a sulfur-containing compound present in liquid or vapor, the sulfur-containing compound being hydrogen sulfide, an —SH group-containing compound or a mixture thereof, the composition containing an ?,?-unsaturated aldehyde represented by the following general formula (1) as an active ingredient; wherein R1 and R2 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms, or are connected to each other to represent an alkylene group having 2 to 6 carbon atoms; and R3 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, or is connected to R1 to represent an alkylene group having 2 to 6 carbon atoms.

Abstract: Provided is a composition for removing iron sulfide, containing, as an active ingredient, an ?,?-unsaturated aldehyde represented by the following general formula (1): wherein R1 to R3 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an aryl group having 6 to 12 carbon atoms, provided that R1 may be connected to R2 or R3, to constitute an alkylene group having 2 to 6 carbon atoms; and that R1 and R2 are not a hydrogen atom at the same time.

Abstract: A method of producing 1,5-pentanedial having an alkyl group at the 3-position, including a step of hydroformylating an aldehyde compound represented by the following general formula (1): wherein R1 represents an alkyl group having from 1 to 6 carbon atoms.

Abstract: A sulfur-containing organosilicon compound represented by the following general formula (I) or (II): wherein R1 to R3 each independently represent a chlorine atom, a methoxy group, or an ethoxy group; R4 represents an alkyl group having 1 to 10 carbon atoms; R5 represents an alkylene group having 1 to 10 carbon atoms; and n represents an integer of 2 to 6.

Abstract: An object of the present invention is to provide a biological corrosion inhibitor for a metal, which exhibits the effect at a low concentration and is superior in biodegradability. A biological corrosion inhibitor for a metal including 3-methylglutaraldehyde as an effective ingredient is provided.

Abstract: There is provided a composition containing one or more basic compounds selected from the group consisting of tertiary amines, nitrogen-containing heterocyclic aromatic compounds, alkali metal carbonate salts, alkaline earth metal carbonate salts and alkali metal hydrogencarbonate salts, and a homoallyl halide.

Abstract: An organosilicon compound represented by the following general formula (I): wherein R1 to R3 each independently represent a chlorine atom, a methoxy group, or an ethoxy group; R4 represents an alkyl group having 1 to 10 carbon atoms; R5 represents an alkylene group having 1 to 10 carbon atoms; and R6 represents a hydrogen atom or a methyl group.