公开(公告)号：US20160376227A1

公开(公告)日：2016-12-29

申请号：US15116541

申请日：2015-02-03

Applicant: BASF SE

Inventor： Hermann Luyken ,  Peter PFAB ,  Tim JUNGKAMP

IPC: C07C253/34

CPC classification number: C07C253/34 ,  C07C209/48 ,  C07C253/10 ,  C07C255/04 ,  C07C211/12

Abstract: The present invention relates to a process for purifying adiponitrile (ADN), wherein crude ADN is introduced into a rectification apparatus (R1). The rectification apparatus (R1) comprises a first side draw and preferably also a second side draw, the first side draw being disposed below the crude ADN introduction point and the optional second side draw being disposed above the crude ADN introduction point. The first side draw is used to draw off a gaseous stream comprising ADN while the optional second side draw is used to draw off undesired by-products such as 1-amino-2-cyanocyclopentene (ACCP) which are often generated in ADN production and consequently may be present in the crude ADN. The gaseous stream from the first side draw of (R1) is introduced into a second rectification apparatus (R2). (R2) is used to separate off ADN from remaining high boilers and any other by-products present, pure ADN being drawn off from (D2) as overhead product. It is preferable when the process according to the invention employs crude ADN from a reaction of butadiene with hydrocyanic acid (HCN).

Abstract translation: 本发明涉及一种纯化己二腈（ADN）的方法，其中将粗ADN引入精馏装置（R1）。 整流装置（R1）包括第一侧拉伸，优选地还包括第二侧拉伸，第一侧拉伸设置在粗ADN引入点的下方，并且可选的第二侧拉伸设置在粗ADN引入点的上方。 第一侧拉伸用于抽出包含ADN的气流，而任选的第二侧拉伸用于除去常常在ADN生产中产生的不希望的副产物，例如1-氨基-2-氰基环戊烯（ACCP），因此 可能存在于粗ADN中。 将来自（R1）的第一侧拉制的气流引入第二整流装置（R2）。 （R2）用于将ADN与剩余的高锅炉和任何其他副产物分离出来，纯的ADN作为塔顶产物从（D2）中排出。 当根据本发明的方法从丁二烯与氢氰酸（HCN）的反应中使用粗ADN时，是优选的。