A highly efficient process for the production and recovery of pure succinic acid from a succinate salt that involves minimal use of additional reagents, and produces virtually no waste by-products, and permits internal recycle of the base and acid values, is provided. The method involves the formation of diammonium succinate, either by using an ammonium ion based material to maintain neutral8 pH in the fermenter or by substituting the ammonium cation for the cation of the succinate salt created in the fermenter. The diammonium succinate can then be reacted with a sulfate ion, such as by combining the diammonium succinate with ammonium bisulfate and/or sulfuric acid at sufficiently low pH to yield succinic acid and ammonium sulfate. The ammonium sulfate is advantageously cracked thermally into ammonia and ammonium bisulfate. The succinic acid can be purified with a methanol dissolution step. Various filtration, reflux and reutilization steps can also be employed.
                            提供了一种高效的工艺,用于从
琥珀酸盐中生产和回收纯
琥珀酸,该工艺最小限度地使用额外试剂,几乎不产生废弃物,允许基础和酸价的内部循环。该方法涉及通过使用以
铵离子为基础材料维持发酵罐中的中性pH或通过将
铵阳离子替换为在发酵罐中创建的
琥珀酸盐的阳离子来形成二
铵琥珀酸盐。然后可以将二
铵琥珀酸盐与
硫酸根离子反应,例如在足够低的pH下将二
铵琥珀酸盐与
硫酸氢铵和/或
硫酸反应,以产生
琥珀酸和
硫酸铵。
硫酸铵可以有利地通过热裂解成
氨和
硫酸氢铵。
琥珀酸可以通过
甲醇溶解步骤纯化。还可以采用各种过滤、回流和再利用步骤。