The present invention relates to a process for the preparation of phenyl ketones and the preparation of phenoxyphenyl derivatives.

Provided is a method of producing an anhydride of an organic mono-acid comprising contacting an organic mono-acid and a thermally regenerable anhydride to produce the anhydride of the organic mono-acid, and either a diacid of the regenerable anhydride, a partially hydrolyzed regenerable anhydride, or both. In a particular example, acetic acid and glutaric anhydride can be reacted to form acetic anhydride.

Process for the production of a diacyl peroxide involving the reaction of an anhydride with hydrogen peroxide, removal of the formed carboxylic acid, production of an anhydride from said carboxylic acid, and recycling of the anhydride within the process.

Process for the production of a diacyl peroxide involving the reaction of an anhydride with hydrogen peroxide, removal of the formed carboxylic acid, production of an anhydride from said carboxylic acid, and recycling of the anhydride within the process.

Process for the production of a diacyl peroxide involving the reaction of an anhydride with an aldehyde and oxygen, removal of the formed carboxylic acid, production of an anhydride from said carboxylic acid, and recycling of the anhydride within the process.

Process for the production of a diacyl peroxide involving the reaction of an anhydride with an aldehyde and oxygen, removal of the formed carboxylic acid, production of an anhydride from said carboxylic acid, and recycling of the anhydride within the process.

Process for the production of a diacyl peroxide involving the reaction of an anhydride with hydrogen peroxide, removal of the formed carboxylic acid, production of an anhydride from said carboxylic acid, and recycling of the anhydride within the process.

Process for the production of a diacyl peroxide involving the reaction of an anhydride with hydrogen peroxide, removal of the formed carboxylic acid, production of an anhydride from said carboxylic acid, and recycling of the anhydride within the process.

4-Arylbenzoyl benzoic acid esters, such as the ethylhexyl esters and amyl esters of 4-phenylbenzoyl benzoic acid, are described, which are liquid and show excellent solubility in acrylic or methacrylic monomers. Compounds of Formula 1, wherein R.sup.1, R.sup.2, and A are as defined herein, are disclosed. They are suitable as components for radical photoinitiator systems for UV-curable compositions. ##STR00001##

4-Arylbenzoyl benzoic acid esters, such as the ethylhexyl esters and amyl esters of 4-phenylbenzoyl benzoic acid, are described, which are liquid and show excellent solubility in acrylic or methacrylic monomers. Compounds of Formula 1, wherein R.sup.1, R.sup.2, and A are as defined herein, are disclosed. They are suitable as components for radical photoinitiator systems for UV-curable compositions. ##STR00001##