Higher secondary alcohol alkoxylate precursor, higher secondary alcohol alkoxylate adduct and higher secondary alkyl ether sulfate ester salt, and methods for producing these
AssigneeNippon Shokubai Co., Ltd.
InventorsAtsushi Okada, Toru Inaoka
Life of this patent
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Abstract
A higher secondary alcohol alkoxylate precursor is obtained by reacting a long-chain olefin with a (poly)alkylene glycol. The precursor has a content of (poly)alkylene glycol of 0.2% by mass or lower with respect to the total mass of the higher secondary alcohol alkoxylate; a higher secondary alcohol alkoxylate adduct which is an alkylene oxide adduct of the higher secondary alcohol alkoxylate precursor; and a higher secondary alkyl ether sulfate ester salt which is a sulfated product of the higher secondary alcohol alkoxylate precursor or the higher secondary alcohol alkoxylate adduct.
Claims10
A method for producing a higher secondary alcohol alkoxylate, the method comprising the steps of:
- adding a (poly) alkylene glycol to a double bond of a long-chain olefin having 8 to 30 carbon atoms in the presence of a catalyst to thereby obtain a higher secondary alcohol alkoxylate;
- and
- bringing a solvent into contact with the higher secondary alcohol alkoxylate to thereby wash the higher secondary alcohol alkoxylate to reach a content of (poly) alkylene glycol of 0.001% by mass or higher and 0.2% by mass or lower with respect to a total mass of the higher secondary alcohol alkoxylate,
- wherein the adding is carried out under a solvent-free condition.
A method for producing a higher secondary alcohol alkoxylate, the method comprising the steps of:
- adding a (poly) alkylene glycol to a double bond of a long- chain olefin having 8 to 30 carbon atoms in the presence of a catalyst only, to thereby obtain a higher secondary alcohol alkoxylate;
- and
- bringing a solvent into contact with the higher secondary alcohol alkoxylate to thereby wash the higher secondary alcohol alkoxylate to reach a content of (poly) alkylene glycol of 0.001% by mass or higher and 0.2% by mass or lower with respect to a total mass of the higher secondary alcohol alkoxylate.
A method for producing a higher secondary alcohol alkoxylate, the method comprising the steps of:
- reacting a (poly) alkylene glycol with a long-chain olefin having 8 to 30 carbon atoms in the presence of a catalyst in a reactor to thereby obtain a higher secondary alcohol alkoxylate, wherein an initial reaction mixture charged to the reactor consists essentially of the long-chain olefin, the (poly) alkylene glycol, and the catalyst;
- and
- bringing a solvent into contact with the higher secondary alcohol alkoxylate to thereby wash the higher secondary alcohol alkoxylate to reach a content of (poly) alkylene glycol of 0.001% by mass or higher and 0.2% by mass or lower with respect to a total mass of the higher secondary alcohol alkoxylate.
Dependencies are inferred from the claim text.