Preparation method of carboxylate

Abstract

The invention discloses a preparation method of carboxylate. The preparation method takes olefin, fatty alcohol and carbon monoxide as reaction raw materials and takes a multifunctional porous organicpolymer as a carrier-loaded palladium-based multi-phase catalyst to catalyze to the raw materials to prepare the carboxylate through olefin carbonylation one-step reaction, wherein the multifunctional porous organic polymer is prepared by carrying out dissolution heat copolymerization on a vinyl functionalized phosphine ligand and an acid group functionalized p-styrene and acidifying. According to the preparation method disclosed by the invention, the olefin conversion ratio and the selectivity of a target product carboxylate are improved; the catalyst has high catalytic activity on the reaction and the reaction is moderate; the olefin carbonylation reaction is realized under relatively moderate conditions; a catalysis system has no corrosion on equipment, is simple to prepare and belongsto an environment-friendly type catalyst. The multi-phase catalyst provided by the invention is easy to separate from the product and is recycle and utilize; the one-time investment and production cost of production and subsequent separation devices are reduced and large-scale continuous industrial application is easy to realize.

Description

technical field [0001] The invention relates to a carboxylate prepared by carbonylation of olefins by using olefins, fatty alcohols and carbon monoxide as reaction raw materials. Background technique [0002] As a branch of ester compounds, carboxylate is an important fine chemical, which is widely used in the production process of drugs, resins, coatings, food solvents, plasticizers, cosmetics, etc. In recent years, researchers at home and abroad have paid special attention to the preparation methods of carboxylate compounds. The traditional carboxylate synthesis method is esterification of alcohol and organic acid under strong acid catalysis. Most of the catalysts currently used in this production method are concentrated sulfuric acid, which has the following obvious disadvantages: 1) it is easy to carbonize and oxidize organic matter, which affects the refining of esterification products; 2) severely corrodes equipment and increases production costs; 3) the treatment of ...

AI Technical Summary

Problems solved by technology

Most of the catalysts currently used in this production method are concentrated sulfuric acid, which has the following obvious disadvantages: 1) it is easy to carbonize and oxidize organic matter, which affects the refining of esterification products; 2) severely corrodes equipment and increases production costs; 3) the treatment of three wastes is troublesome and serious pollution surroundings

However, the homogeneous phosphine ligand used is not stable under the reaction conditions, and after its decomposition, the active center palladium will be deposited rapidly leading to catalyst deactivation.

In the reaction process, it is generally necessary to add a strong acid catalyst system, which will not only put forward higher requirements for the equipment, increase the one-time investment, but also produce a large amount of three wastes and pollute the environment.

In addition, the homogeneous catalyst is difficult to separate from the product for recycling, which affects the industrial application of the process

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