公开(公告)号：EP2931694A1

公开(公告)日：2015-10-21

申请号：EP13862270.9

申请日：2013-12-11

Applicant: Ure, Alan MacPherson ,  INVISTA Technologies S.à.r.l.

Inventor： URE, Alan Macpherson

IPC: C07C51/46 ,  C07C7/06 ,  C07B63/02

CPC classification number: B01D3/36 ,  B01D3/42 ,  C07C7/005 ,  C07C51/46 ,  C07C15/02 ,  C07C53/00

Abstract: Disclosed is a process for the separation of water from a liquid phase medium containing an aliphatic carboxylic acid using azeotropic distillation in the presence of an entrainer. The entrainer, water, and organics are subsequently separated, wherein the entrainer is recycled back to the azeotropic distillation column and organics recycled back to the oxidation reactor.

公开(公告)号：EP3197856A1

公开(公告)日：2017-08-02

申请号：EP15767489.6

申请日：2015-09-23

Applicant: INVISTA Technologies S.à.r.l.

Inventor： URE, Alan Macpherson ,  LIMBACH, Antony Peter John

IPC: C07C51/265 ,  C07C51/44 ,  C07C51/48 ,  C07C63/26 ,  B01D11/00

Abstract: The present invention provides a process for the production of an aromatic dicarboxylic acid comprising the catalytic oxidation of a hydrocarbon precursor in an organic solvent, comprising the steps of: i) separating a vent gas from an oxidation stage into an organic solvent-rich liquid stream and a water-rich vapor stream in a distillation stage; and ii) separating an aqueous purification mother liquor comprising organic compounds from purified aromatic dicarboxylic acid crystals in a separation stage, characterized in that the process further comprises the steps of: iii) transferring the aqueous purification mother liquor from the separation stage to an extraction stage; iv) extracting said organic compounds from the aqueous purification mother liquor by contacting the aqueous purification mother liquor at a temperature of at least 90° C. with an organic liquid in the extraction stage to form an aqueous phase and an organic phase, wherein the concentration of said organic compounds in the aqueous phase is lower than the concentration of said organic compounds in the aqueous purification mother liquor; and v) transferring the aqueous phase to said distillation stage. The present invention further provides an apparatus for carrying out the process.

Abstract translation: 本发明提供了一种生产芳族二羧酸的方法，该方法包括在有机溶剂中催化氧化烃前体，该方法包括以下步骤：i）将排气从氧化阶段分离成富有机溶剂的液体流 和蒸馏阶段中的富含水的蒸气流; 和ii）在分离阶段将包含有机化合物的水性纯化母液与纯化的芳族二羧酸晶体分离，其特征在于所述方法进一步包括以下步骤：iii）将来自分离阶段的水性纯化母液转移到萃取阶段 ; iv）通过在提取阶段使至少90℃的温度下的含水提纯母液与有机液体接触以形成水相和有机相，从水提纯母液中提取所述有机化合物，其中所述有机相 水相中的化合物低于水性净化母液中所述有机化合物的浓度; 和v）将水相转移到所述蒸馏阶段。 本发明还提供了一种用于执行该过程的装置。