A process and a plant are specified, with which free fatty acids can be obtained in a simple manner by hydrolysis of fatty acid alkyl esters, especially fatty acid methyl esters (FAME), or alternatively of fatty acid triglycerides present in oils and fats of vegetable and animal origin. According to the invention, a portion of the free fatty acids already produced is recycled back into the reaction mixture, which results in self-acceleration of the hydrolysis reaction.

A process and a plant are specified, with which free fatty acids can be obtained in a simple manner by hydrolysis of fatty acid alkyl esters, especially fatty acid methyl esters (FAME), or alternatively of fatty acid triglycerides present in oils and fats of vegetable and animal origin. According to the invention, a portion of the free fatty acids already produced is recycled back into the reaction mixture, which results in self-acceleration of the hydrolysis reaction.

A process for manufacturing a lubricant additive for internal combustion engine fuel, especially for diesel fuel, in which the additive is derived, especially directly, from the esterification of acid oils, such acid oils are especially coming from the acidification of neutralization paste obtained via a process for refining, preferably a process for chemical refining, and especially a process for saponifying, one or more oils chosen from a plant oil and/or an animal oil, and the lubricant additive is more particularly intended for fuels with a low sulfur content, for example less than 500 ppm (weight).

A process for manufacturing a lubricant additive for internal combustion engine fuel, especially for diesel fuel, in which the additive is derived, especially directly, from the esterification of acid oils, such acid oils are especially coming from the acidification of neutralization paste obtained via a process for refining, preferably a process for chemical refining, and especially a process for saponifying, one or more oils chosen from a plant oil and/or an animal oil, and the lubricant additive is more particularly intended for fuels with a low sulfur content, for example less than 500 ppm (weight).

The present invention relates to methods of producing oil raw material for HVO production from vegetable oil which has been processed by an enzyme catalysed hydrolysis process and separation to reduce the content of phosphorous.

The present invention relates to methods of producing oil raw material for HVO production from vegetable oil which has been processed by an enzyme catalysed hydrolysis process and separation to reduce the content of phosphorous.

Processes and system for producing biofuels and coproducts are described herein. The system includes a heterogeneous acid catalyst and reactors for reacting a) an alcohol and b) a mixture of a fatty acid glyceride and a fatty acid. The system may further include a pretreatment system and a purification system.

Processes and system for producing biofuels and coproducts are described herein. The system includes a heterogeneous acid catalyst and reactors for reacting a) an alcohol and b) a mixture of a fatty acid glyceride and a fatty acid. The system may further include a pretreatment system and a purification system.

Provided is a method for producing a polyunsaturated fatty acid while preventing deterioration of a silver salt solution. A method for producing a composition comprising a polyunsaturated fatty acid, comprising: supplying an aqueous solution comprising a silver salt into a reaction vessel to contact the aqueous solution with a raw material solution comprising an alkyl ester of the polyunsaturated fatty acid; and collecting the aqueous solution comprising the silver salt which has been contacted with the raw material solution from the reaction vessel, wherein the supply of the aqueous solution comprising the silver salt into the reaction vessel and the collection of the aqueous solution comprising the silver salt from the reaction vessel are carried out concurrently with each other.

Provided is a method for producing a polyunsaturated fatty acid while preventing deterioration of a silver salt solution. A method for producing a composition comprising a polyunsaturated fatty acid, comprising: supplying an aqueous solution comprising a silver salt into a reaction vessel to contact the aqueous solution with a raw material solution comprising an alkyl ester of the polyunsaturated fatty acid; and collecting the aqueous solution comprising the silver salt which has been contacted with the raw material solution from the reaction vessel, wherein the supply of the aqueous solution comprising the silver salt into the reaction vessel and the collection of the aqueous solution comprising the silver salt from the reaction vessel are carried out concurrently with each other.