Ammonium Hydroxide → L-Malic Acid

Participants

Reaction Steps

If, for example, 300 g of fumaric acid per liter is introduced and the pH of the suspension with NH4OH is set at 8, a part of the undissolved NH4 fumarate is present as feedstock. With progressing conversion of the dissolved fumarate to L-malate, the fumarate that first was undissolved goes into solution and becomes accessible for conversion to L-malate. At harvest time, an L-malate concentration of about 300 g/l (calculated at L-malic acid) is obtained.

Provenance & Evidence