Dodecanedioic acid crystal and preparation method thereof

• Main Authors: SU YI, GAO QIHE, YAN LIMING
• Format: Patent
• Language: Chinese; English
• Published: 30.10.2020
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention belongs to the technical field of crystal preparation, in particular to a dodecanedioic acid crystal and a preparation method thereof. The method specifically comprises the following steps: putting dodecanedioic acid and water into a hydrothermal reaction kettle, heating to 85-100 DEG C, keeping the temperature for more than 1 hour, slowly cooling at the speed of less than or equal to 3 DEG C/0.5 hour, and opening the hydrothermal reaction kettle when the temperature is 50-80 DEG C, thereby obtaining the crystal. The dodecanedioic acid crystal prepared by the method is good in crystal particle size controllability and is not easy to agglomerate; the crystal bulk density is high and the bulk density distribution is stable. 本发明属于晶体制备技术领域，具体涉及一种十二碳二元酸的晶体及其制备方法，所述方法具体为将十二碳二元酸和水置于水热反应釜，加热到85～100℃，保持1小时以上，然后以小于等于3℃/0.5h的速率缓慢降温，至温度为50～80℃时打开水热反应釜，即得所述晶体。本发明的方法制备的十二碳二元酸晶体结晶粒度可控性好，不易于团聚；晶体堆密度大，且堆密度分布稳定。