申请人:Michigan State University
公开号:US06265190B1
公开(公告)日:2001-07-24
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。