Recovery of a Succinic, Formic, and Acetic Acid Mixture from a Model Fermentation Broth by Simulated Moving Bed Adsorption with Methanol as a Desorbent

Abstract

This work aims to study the recovery of succinic acid, formic acid, and acetic acid from a model fermentation broth by adsorption using a commercial polyvinylpyridine (PVP) resin (Reillex 425), with methanol as the desorbent. A theoretical model has been developed to describe the adsorption/ desorption dynamics of succinic acid/water, formic acid/water, and succinic acid/formic acid/acetic acid/glucose/methanol/water mixtures in a fixed bed of commercial resin. The model has been used to design and optimize a simulated moving bed process to recover acids from a model fermentation broth using the triangle theory and volume separation method. It is possible to recover 95% of the acids, with 99.9% purity, with a productivity of 24.737 kg m solid −3 h −1 and a desorbent consumption of 0.0901 m 3 kg −1 . The acids are obtained free of watersoluble impurities and water, mixed with methanol, and can be subsequently separated or used directly in esterification processes with methanol.

Electrodeionization for the Bio-Succinic Acid Production Process

“…Sorption and ion exchange are severely restricted in the case of carboxylic acids. For example, a mixture of succinic, formic, and acetic acids was isolated by adsorption using a commercial polyvinylpyridine (PVP) resin (Reillex 425), with methanol as the desorbent and a separation efficiency of 95% . However, a mixture of acids, not carboxylates, was subjected to the process, and the recovery was related to the separation of the sum of these acids.…”

“…For example, a mixture of succinic, formic, and acetic acids was isolated by adsorption using a commercial polyvinylpyridine (PVP) resin (Reillex 425), with methanol as the desorbent and a separation efficiency of 95%. 27 However, a mixture of acids, not carboxylates, was subjected to the process, and the recovery was related to the separation of the sum of these acids. When ionexchange resin for carboxylate conversion is used, the process is inefficient due to the limited capacity of ion exchangers and the need for frequent regeneration, which is associated with additional waste streams.…”

“…The downstream production of succinic acid accounts for about 80% of the operating costs of the overall production process and usually involves several steps of purification and separation . The methods of purification and separation of succinic acid from the solution described in the literature take into account different separation techniques, including esterification, chromatographic separation, , adsorption, extraction, − membrane methods, , precipitation, and crystallization …”

Integrated Operation of Artificial-Photosynthetic Reaction and Product Isolation to Output Only Pure Formic Acid

“…Various means were previously applied to the isolation of carboxylic acids dissolved in aqueous solutions. However, selective adsorption on ion-exchange resins requires large amounts of desorbents, , while electric-energy consumption for electrodialysis is enomous. − Therefore, these two means are not suitable for solving the global warming issue. On the contrary, it would be difficult to achieve the extremely high selectivity required for the present purpose by presser-driven nanofilteration. − By contrast, reactive extraction would be promising. , Indeed, it was applied to extract formic acid in 2 M aqueous solution without other solutes .…”

“…Various means were previously applied to the isolation of carboxylic acids dissolved in aqueous solutions. However, selective adsorption on ionexchange resins requires large amounts of desorbents, 26,27 while electric-energy consumption for electrodialysis is enomous. 28−30 Therefore, these two means are not suitable for solving the global warming issue.…”