Process for preparing mercaptoalkyl carboxylates

US8907119B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Florian Garlichs · Neustadt, DE
• Jens Baldamus · Ludwigshafen, DE
• Gerd Kaibel · Lampertheim, DE

Key dates

• Filing date: Aug 22, 2012
• Grant date: Dec 9, 2014
• Expiry date: Apr 9, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In the acid-catalyzed esterification of mercaptoalkyl alcohols by means of carboxylic acids to form mercaptoalkly carboxylates, formation of undesirable, usually sparingly soluble by-products usually occurs. The process of the invention in the absence of acid catalysts avoids the formation of such by-products. Particularly when the esterification of the invention is carried out as reactive distillation using reactive column and residence vessel, good degrees of conversion can also be obtained without acid catalyst and at the same time the formation of the by-products can be largely avoided.