The Procter Gamble Company

Nippon Shokubai Co., Ltd.

Juan Estaban Velasquez

Dimitris Ioannis Collias

Jane Ellen Godlewski

Janette Marie Villalobos

Axel Meyer

Peter Dziezok

Hideaki Tsuneki

Janette Villalobos Lingoes

Marc Andrew Mamak

Fred Christian Wireko

Masanori Nonoguchi

Tomoharu Oku

Nancy Lee Redman-Furey

Masaki Okada

Masashi Tonoya

Koji Shingubara

Motosuke Imada

Shinji Kanbara

The present invention aims to provide a regeneration method capable of sufficiently restoring the catalytic performance of a solid catalyst used in a dehydration reaction of lactic acid and derivatives thereof. The present invention relates to a method for regenerating a solid catalyst used in a dehydration reaction of lactic acid and derivatives of lactic acid, the method including a contacting step of bringing a solid catalyst containing a component that forms a molten salt in the presence of steam into contact with oxygen and steam under pressure.

Regeneration method of solid catalyst

Catalysts for dehydrating hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity, short residence time, and without significant conversion to undesired side products, such as, for example, acetaldehyde, propionic acid, and acetic acid, are provided. The catalysts are mixed condensed phosphates. Methods of preparing the catalysts are also provided.

Catalysts for the conversion of hydroxypropionic acid or its derivatives to acrylic acid or its derivatives

Processes for the catalytic dehydration of hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propanoic acid, and acetic acid, are provided.

Process for production of acrylic acid or its derivatives from hydroxypropionic acid or its derivatives

Methods for catalytically dehydrating hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propionic acid, and acetic acid, are provided. The catalysts are mixed condensed phosphates.

Catalysts conversion of hydroxypropionic acid or its derivatives to acrylic acid or its derivatives

Bio-based glacial acrylic acid, produced from hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof and having impurities of hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof, is polymerized to poly(acrylic acid) or superabsorbent polymer using the same processes as petroleum-derived glacial acrylic acid.

Poly(acrylic acid) from bio-based acrylic acid and its derivatives

Process for production of acrylic acid or its derivatives

Growing community of inventors

Cincinnati, OH, United States of America

Juan Estaban Velasquez