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Patent for Sale:

Double Salt Effect    

Innovative industrial transesterification catalysts (process)


Innovative dual activation catalysts: "Double salt effect" The invention is an alternative for catalysator patents and is valid for all transesterification reactions by use of an alternative catalysator which consists of iron or zinc acetylacetonate and an appropriate salt.

The invention has commercial relevance for chemical engineering and production companies due to the fact that it can replace the conventional catalysts in the transesterification steps by a novel patent protected mode.

UNIQUENESS: An acetylacetonate salt together with a selected inorganic salt has a more then cumulative catalytic effect on transesterification reactions.

ADDED VALUE: catalyst with high functional group tolerance (e.g. activated double bond).
Operational benefits: The patented technology meets the criteria for industrially useful catalysts and has superior performance, is cheap, non-toxic and recyclable.

STRATEGIC BENEFIT: This patent offers freedom to operate to companies which are blocked by enforceable patents in this field.

Primary Application of the Technology

1. New chemical process development.
2. Acrylates in chemical production and heterocyclic esters pharmaceutical process development.
P.e. Production of higher acrylates, polyethylene terephthalate, biodiesel, polyactic acid, active pharmaceutical ingredients.
Scale up: transesterifications of DMC, dimethyl terephthalate, mathyl laurate and methyl methacrylate.

The Problem Solved by the Technology

Transesterification is a crucial step in several industrial processes such as the production of higher acrylates, polyethylene terephthalate, biodiesel, polylactic acid, active pharmaceutical ingredients, etc.

Catalysts used to accelerate these reactions are mainly alkali metal alkoxides or hydroxides and metal alkoxides based on Ti or Sn. In specific cases mineral acids, non-ionic bases and enzymes are used. However, these conventional catalysts suffer from a variety of drawbacks, especially if other functional groups such as unsaturated bonds, amines are present in the reactant ester or alcohol.

How the Technology Solves the Problem

This invention is directed to a general catalyst of high activity and selectivity for the production of a variety of esters, particularly acrylate and methacrylate based esters, by a transesterification reaction.

This objective is achieved by reacting an ester of a carboxylic or a carbonic acid, in particular of a saturated or unsaturated, typically, a 3 to 4 carbon atom carboxylic acid; with an alcohol in the presence of a catalyst consisting of a metal 1,3-dicarbonyl complex and a salt, in particular an inorganic salt.

These catalysts are prepared from readily available starting materials within the reaction medium without the need for isolation (in-situ preparation).

Competitive Advantage

The catalysts have the following advantages:
- Easy preparation, inexpensive and selective
- High tolerance towards functional groups
- Non toxic
- Easy separation
- Reusable with no reduced activity
- Reduced tolerance towards water (no predrying necessary)

The seller may consider selling these patents individually.

Frequently Asked Questions

Why should we buy this patent or take a license?
Companies active in the field of transesterification may create their own freedom to operate by acquiring this IP.