关键词: 溶剂, 损失, ALMA工艺

Abstract: In the process of maleic anhydride production,ALMA process employs solvent to absorb the reaction gas of the rich maleic anhydride,then desorbs and separates the crude maleic anhydride and the rich solvent.After the rich solvent is processed by the alkali treatment reaction system and the defumaric acid reaction system,it could be recycled.Normally,there will be little loss of solvent,but in the production process,there is an abnormal phenomenon of substantial loss of solvent.By taking measures to control technological parameters strictly,such as the absorption tower bottom temperature,the pressure of the rich solvent flash tank,the PH value of alkali treatment reactor,rotate speed,temperature and so on,solvent emulsification and excessive loss can be avoided.Thus,the recycling of solvent could be maximized;the economic performance,social and environmental benefits could be enhanced.

Key words: Solvent, Loss, ALMA process