公开(公告)号：MY150587A

公开(公告)日：2014-01-30

申请号：MYPI20102811

申请日：2008-12-11

Applicant: BASF SE

Inventor： MARKUS SIEGERT ,  NEVEN LANG ,  JOACHIM THIEL ,  ECKHARD STROEFER ,  CHRISTOPH SIGWART

IPC: C07D323/06

Abstract: A PROCESS FOR PREPARING CRUDE TRIOXANE (1) HAVING A CONCENTRATION IN THE RANGE FROM 50 TO 75% BY WEIGHT OF TRIOXANE BY TRIMERIZATION OF FORMALDEHYDE FROM AN AQUEOUS FORMALDEHYDE SOLUTION (2) IN THE PRESENCE OF AN ACID CATALYST (3) AND CONCENTRATION OF THE TRIOXANE FROM THE REACTION MIXTURE FROM THE TRIMERIZATION BY DISTILLATION, WHEREIN - THE TRIMERIZATION OF THE FORMALDEHYDE AND THE CONCENTRATION OF THE TRIOXANE FROM THE REACTION MIXTURE FROM THE TRIMERIZATION ARE CARRIED OUT IN A SINGLE COLUMN (K) WHICH - IS DIVIDED BY A HORIZONTAL DIVIDING PLATE (T) INTO A LOWER COLUMN REGION (A) AND AN UPPER COLUMN REGION (B), WITH THE LOWER COLUMN REGION (A) AND THE UPPER COLUMN REGION (B) BEING CONNECTED BY AN EXTERNAL VAPOR LINE AND AN EXTERNAL LIQUID LINE, AND - A REACTIVE DISTILLATION IN WHICH THE FORMALDEHYDE IS TRIMERIZED TO TRIOXANE AND THE TRIOXANE IN THE REACTION MIXTURE IS CONCENTRATED TO THE SOLUBILITY LIMIT OF FORMALDEHYDE IS CARRIED OUT IN THE LOWER COLUMN REGION (A) AT A PRESSURE IN THE RANGE FROM 0.1 TO 0.5 MPa (1 TO 5 BAR) AND - A DISTILLATION IN WHICH THE TRIOXANE IS CONCENTRATED TO GIVE CRUDE TRIOXANE HAVING A CONCENTRATION IN THE RANGE FROM 50 TO 75% BY WEIGHT IS CARRIED OUT IN THE UPPER COLUMN REGION (B) AT A PRESSURE IN THE RANGE FROM 0.02 TO 0.09 MPa (200 TO 900 MBAR), IS PROPOSED. (FIGURE 1)

公开(公告)号：MY151105A

公开(公告)日：2014-04-15

申请号：MYPI20102295

申请日：2008-12-11

Applicant: BASF SE

Inventor： MARKUS SIEGERT ,  TOBIAS KORTEKAMP ,  ECKHARD STROEFER ,  CHRISTOPH SIGWART ,  NEVEN LANG

IPC: C08G2/10

Abstract: A PROCESS FOR PREPARING POLYOXYMETHYLENE HOMOPOLYMERS OR COPOLYMERS (7) BY HOMOPOLYMERIZATION OR COPOLYMERIZATION OF TRIOXANE, STARTING FROM METHANOL (1), IN WHICH METHANOL (1) IS OXIDIZED IN A FIRST REACTOR IN A FIRST PRODUCTION PLANT (A) TO GIVE AN AQUEOUS FORMALDEHYDE-COMPRISING STREAM (2) WHICH IS FED TO A SECOND PRODUCTION PLANT (B) IN WHICH PURE TRIOXANE (6) IS OBTAINED AND REMOVAL OF LOW BOILERS (5) BY DISTILLATION IS CARRIED OUT AND THE PURE TRIOXANE (6) IS FED TO A THIRD PRODUCTION PLANT (C) IN WHICH IT IS HOMOPOLYMERIZED OR COPOLYMERIZED TO FORM POLYOXYMETHYLENE HOMOPOLYMERS OR COPOLYMERS (7), WHEREIN THE LOW BOILER STREAM (5) FROM THE LOW BOILER REMOVAL COLUMN (K 2) IS RECYCLED TO THE FEED STREAM INTO THE FIRST REACTOR IN THE FIRST PRODUCTION PLANT (A), IS PROPOSED. (FIG. 1)

公开(公告)号：MY149303A

公开(公告)日：2013-08-30

申请号：MYPI20085026

申请日：2007-06-11

Applicant: BASF SE

Inventor： MARKUS SIEGERT ,  NEVEN LANG ,  ECKHARD STROEFER ,  CHRISTOPH SIGWART

IPC: C07D323/06

Abstract: INTEGRATED METHOD FOR THE PREPARATION OF TRIOXANE FROM FORMALDEHYDE, COMPRISING THE STEPS: A) INTRODUCTION OF A FEEDING FLOW (A1) CONTAINING FORMALDEHYDE AND WATER AND A RETURN FLOW (B3) CONSISTING ESSENTIALLY OF FORMALDEHYDE AND TRIOXANE INTO A FORMALDEHYDE CONCENTRATION UNIT, WHEREIN SAID FLOWS ARE SEPARATED INTO A FORMALDEHYDE-RICH FLOW (A2) AND A FLOW (A3) CONSISTING ESSENTIALLY OF WATER; B) INTRODUCTION OF A PRODUCT FLOW (C1), CONTAINING TRIOXANE, WATER, AND FORMALDEHYDE, A RETURN FLOW (E1) CONTAINING TRIOXANE, WATER, AND FORMALDEHYDE, AND POSSIBLY FLOW (A2) INTO A FIRST LOW-PRESSURE DISTILLATION COLUMN, WHEREIN SAID FLOWS ARE DISTILLED AT A PRESSURE OF FROM 0.01 TO 0.15 MPA (0.1 TO 1.5 ATMOSPHERES), WITH A TRIOXANE-ENRICHED FLOW (B1) CONTAINING PREDOMINANTLY TRIOXANE, AND ALSO WATER AND FORMALDEHYDE, A SLOUGH REMOVAL FLOW (B2) CONSISTING ESSENTIALLY OF FORMALDEHYDE AND WATER, AND THE RETURN FLOW (B3) CONTAINING PREDOMINANTLY WATER, AND ALSO FORMALDEHYDE AND TRIOXANE REMOVED AS A SIDE REMOVAL FLOW; C) INTRODUCTION OF A SLOUGH REMOVAL FLOW (B2) AND POSSIBLY THE FLOW (A2) INTO A TRIOXANE SYNTHESIS REACTOR, WHEREIN SAID FLOWS ARE ALLOWED TO REACT, AND WHEREIN THE FLOW (C1) CONTAINING TRIOXANE, WATER, AND FORMALDEHYDE IS OBTAINED; D) INTRODUCTION OF A FLOW (B1) INTO A MID-PRESSURE DISTILLATION COLUMN, WHEREIN SAID FLOW IS DISTILLED AT A PRESSURE OFFROM 0.10 TO 0.30 MPA (1.0 TO 3.0 ATMOSPHERES), WHEREIN A LOW BOILER STREAM (D1) CONTAINING METHANOL, METHYLAL, AND METHYLFORMATE, AND A STREAM (D2) CONTAINING PREDOMINANTLY TRIOXANE AND ALSO FORMALDEHYDE AND WATER ARE OBTAINED; E) INTRODUCTION OF A STREAM (D2) INTO A HIGH-PRESSURE DISTILLATION COLUMN, WHEREIN SAID STREAM IS DISTILLED AT A PRESSURE OF FROM 0.25 TO 1.01 MPA (2.5 TO 10.0 ATMOSPHERES), WHEREIN THE RETURN FLOW (E1) CONTAINS TRIOXANE, WATER, AND FORMALDEHYDE, AND A PRODUCT FLOW (E2) CONSISTING ESSENTIALLY OF TRIOXANE IS OBTAINED; WHEREIN FLOW (A2) CAN BE INTRODUCED INTO EITHER THE LOW-PRESSURE DISTILLATION COLUMN OR INTO THE TRIOXANE-35 SYNTHESIS REACTOR, OR INTO BOTH.