Method for producing ester
AssigneeNof Corporation
InventorsMichimasa Memita, Keiji Hirao
Life of this patent
Estimating the term…
Abstract
The present invention provides a method for producing a high quality ester and an ester obtained by this method. The method includes reacting an alcohol with a carboxylic acid in a presence of a Lewis acid catalyst in an amount of 0.00001 to 0.005 mol and a phosphorus-containing reducing agent in an amount of 0.0003 to 0.005 mol with respect to one mol of carboxyl groups of the carboxylic acid, and separating a resultant ester. This ester is useful as ester lubricating base stock for grease, automotive engine oil, and refrigerating machine oil.
Claims13
A method for producing an ester including reacting an alcohol with a carboxylic acid, comprising:
- reacting the alcohol with the carboxylic acid in a presence of a Lewis acid catalyst in an amount of 0.00001 to 0.005 mol and a phosphorus-containing reducing agent in an amount of 0.0003 to 0.005 mol with respect to one mol of carboxyl groups of the carboxylic acid, and
- separating a resultant ester.
An ester obtained by a process comprising:
- reacting an alcohol with a carboxylic acid in a presence of a Lewis acid catalyst in an amount of 0.00001 to 0.005 mol and a phosphorus-containing reducing agent in an amount of 0.0003 to 0.005 mol with respect to one mol of carboxyl groups of the carboxylic acid, and
- separating a resultant ester,
- wherein the acid catalyst and the reducing agent are substantially removed from the resultant ester.
An ester lubricating base stock for grease obtained by a method comprising:
- reacting a neopentyl polyol having 2 to 6 hydroxyl groups with a monocarboxylic acid having 5 to 10 carbon atoms in a presence of a Lewis acid catalyst in an amount of 0.00001 to 0.005 mol and a phosphorus-containing reducing agent in an amount of 0.0003 to 0.005 mol with respect to one mol of carboxyl groups of the carboxylic acid, and
- separating a resultant ester,
- wherein the acid catalyst and the reducing agent are substantially removed from the resultant ester.
An ester lubricating base stock for refrigerating machine oil obtained by a process comprising:
- reacting a neopentyl polyol having 2 to 6 hydroxyl groups with a monocarboxylic acid having 5 to 10 carbon atoms in a presence of a Lewis acid catalyst in an amount of 0.00001 to 0.005 mol and a phosphorus-containing reducing agent in an amount of 0.0003 to 0.005 mol with respect to one mol of carboxyl groups of the carboxylic acid, and
- separating a resultant ester,
- wherein the acid catalyst and the reducing agent are substantially removed from the resultant ester.
An ester lubricating base stock for automotive engine oil obtained by a process comprising:
- reacting a neopentyl polyol having 2 to 4 hydroxyl groups with a monocarboxylic acid having 5 to 12 carbon atoms in a presence of a Lewis acid catalyst in an amount of 0.00001 to 0.005 mol and a phosphorus-containing reducing agent in an amount of 0.0003 to 0.005 mol with respect to one mol of carboxyl groups of the carboxylic acid, and
- separating a resultant ester,
- wherein the acid catalyst and the reducing agent are substantially removed from the resultant ester.
Dependencies are inferred from the claim text.