Patents Assigned to SHANGHAI BASF POLYURETHANE COMPANY LIMITED
  • Separation method for dinitrotoluene and mixed acid in a toluene to dinitrotoluene process
    Patent number: 9284257
    Abstract: Proposed is a separation method in a toluene to dinitrotoluene process, wherein said method with a first process step comprising feeding a toluene comprising first stream (1) and a nitric acid comprising second stream (2) into a first reactor (R1), reacting of the toluene comprising first stream (1) and the nitric acid comprising second stream (2) within the first reactor (R1) to a first reaction mixture (3), said first reaction mixture (3) comprising a first liquid/liquid mixed phase of an acid phase and an organic phase comprising mononitrotoluene, feeding the first reaction mixture (3) into a first separation device (S1), separating the first reaction mixture (3) within the first separation device (S1) into a first forward stream (4) having a flow direction to a second process step and a first backward stream (5) having a flow direction back to the first reactor (R1), said method having a second process step comprising feeding the first forward stream (4) into a second reactor (R2), feeding a nitric acid c
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: March 15, 2016
    Assignees: BASF SE, Shanghai BASF Polyurethane Company Limited
    Inventors: Yuanshen Dai, Da Peng Li, Pei Shi Jia, Zhan Cai, Samuel Neto
  • SEPARATION METHOD FOR DINITROTOLUENE AND MIXED ACID IN A TOLUENE TO DINITROTOLUENE PROCESS
    Publication number: 20150329469
    Abstract: Proposed is a separation method in a toluene to dinitrotoluene process, wherein said method with a first process step comprising feeding a toluene comprising first stream (1) and a nitric acid comprising second stream (2) into a first reactor (R1), re acting of the toluene comprising first stream (1) and the nitric acid comprising second stream (2) within the first reactor (R1) to a first reaction mixture (3), said first reaction mixture (3) comprising a first liquid/liquid mixed phase of an acid phase and an organic in phase comprising mononitrotoluene, feeding the first reaction mixture (3) into a first separation device (S1), separating the first reaction mixture (3) within the first separation device (S1) into a first forward stream (4) having a flow direction to a second process step and a first backward stream (5) having a flow direction back to the first reactor (R1), said method having a second process step comprising feeding the first forward stream (4) into a second reactor (R2), feeding a nitric ac
    Type: Application
    Filed: December 10, 2013
    Publication date: November 19, 2015
    Applicants: BASF SE, SHANGHAI BASF POLYURETHANE COMPANY LIMITED
    Inventors: Yuanshen DAI, Da Peng LI, Pei Shi JIA, Zhan CAI, Samuel NETO