US 12,006,286 B2Granted

Method for transesterification of carboxylic acid esters

AssigneeOmya International AG

InventorsJamal Ftouni, Matthias Welker, Samuel Rentsch

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Abstract

The present invention relates to a method for transesterification of carboxylic acid esters by heterogeneous catalysis using a catalyst that is obtainable by calcination of surface-reacted calcium carbonate. The invention further relates to the use of said method in the production of fuel or fuel components, such as biodiesel. Further aspects of the present invention relate to the transesterified ester obtainable by the inventive method and to its use as fuel or as fuel component. Still another aspect of the present invention relates to a corresponding transesterification catalyst and to its use in transesterification reactions.

Claims18

Dependent claims

A transesterification catalyst comprising partially or fully calcined surface-reacted calcium carbonate, wherein the calcination is carried out at a calcination temperature of at least 650° C.,

wherein the transesterification catalyst has a specific surface area of from 15 to 200 m2/g, measured using nitrogen and the BET method according to ISO 9277:2010, and
wherein the surface-reacted calcium carbonate is a reaction product of ground natural calcium carbonate containing mineral (GNCC) or precipitated calcium carbonate (PCC) with carbon dioxide and one or more H3O+ ion donors and wherein the carbon dioxide is formed in situ by a reaction with the H3O+ ion donors and/or is supplied from an external source, and
wherein the surface-reacted calcium carbonate has a specific surface area of from 15 to 200 m2/g, measured using nitrogen and the BET method according to ISO 9277:2010.

Dependencies are inferred from the claim text.

Facts

Application: 16/981,858Filed 19 Mar 2019
Priority: EP 1816358023 Mar 2018
Published: US 2021/0122696 A129 Apr 2021
Granted: 11 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification28 codes

C07C 67/03
Preparation of carboxylic acid esters: by reacting an ester group with a hydroxy group
B01J 23/02
Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00: of the alkali- or alkaline earth metals or beryllium
B01J 35/40
Catalysts, in general, characterised by their form or physical properties: characterised by dimensions, e.g. grain size
B01J 35/613
Surface area: 10-100 m2/g

Family

US 2021/0122696 A1Pre-grant publication · published 29 Apr 2021
US 12,006,286 B2This patent

From the US filing history. Foreign family members aren’t listed.

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