公开(公告)号：US20200094160A1

公开(公告)日：2020-03-26

申请号：US16472054

申请日：2017-12-11

Applicant: BASF SE

Inventor： Ortmund LANG ,  Bernd METZEN ,  Claus HECHLER

IPC: B01D3/14 ,  B01D3/22 ,  B01D3/42 ,  C07C67/54

Abstract: Process for isolating pure 2-ethylhexyl acrylate or pure 2-propylheptyl acrylate from the corresponding crude alkyl acrylate by distillation, wherein the process is carried out in a dividing wall column (1) which has separation-active internals and vaporizer (7) and in which a dividing wall (8) is arranged in the longitudinal direction of the column to form an upper joint column region (9), a lower joint column region (14), an inflow section (10, 12) having a side feed point (2) and an offtake section (11, 13) having a side offtake point (3), the column has a number of theoretical plates in the range from 10 to 60, where the number of theoretical plates of the dividing wall column (1) relates to the sum of the theoretical plates in the joint upper column region (9), the joint lower column region (14) and the inflow section (10, 12), the side feed point (2) for the corresponding crude alkyl acrylate is arranged at a theoretical plate in the region commencing at least two theoretical plates above the bottommost theoretical plate and ending at least two theoretical plates below the uppermost theoretical plate, the side offtake point (3) for the pure 2-ethylhexyl acrylate or pure 2-propylheptyl acrylate is arranged at a theoretical plate in the region commencing at least two theoretical plates above the bottommost theoretical plate and ending at least two theoretical plates below the uppermost theoretical plate and the dividing wall (8) is arranged in the column in the region commencing at least one theoretical plate above the bottommost theoretical plate and ending at least one theoretical plate below the uppermost theoretical plate, where the ratio of amount of liquid at the upper end of the dividing wall (8) going to the enrichment section (10) and the stripping section (11) of the column is set in the range from 1:0.2 to 1:5.

公开(公告)号：US20250011273A1

公开(公告)日：2025-01-09

申请号：US18712271

申请日：2022-11-17

Applicant: BASF SE

Inventor： Claus HECHLER ,  Ortmund LANG ,  Horst HOFMANN

IPC: C07C67/08 ,  C07C67/54

Abstract: A process for the production of higher (meth)acrylic esters, comprises an esterification step of esterifying (meth)acrylic acid with an alcohol to obtain a crude (meth)acrylic ester, the (meth)acrylic acid containing trace amounts of acetic acid; and purification steps of purifying the crude (meth)acrylic ester. The purification steps comprise introducing crude (meth)acrylic ester into the side of a low boiler column with a rectifying section disposed above the feed point of the crude (meth)acrylic ester and a stripping section disposed below the feed point; withdrawing purified (meth)acrylic ester from the low boiler column; withdrawing a low boiler fraction from the top of the low boiler column, the low boiler fraction comprising alcohol and acetic ester and less than 10 wt.-% of (meth)acrylic ester; directing the low boiler fraction to an acetate column, the acetate column being operated at a pressure at least 50 mbar higher than the low boiler column pressure, and separating the low boiler fraction into an alcohol fraction withdrawn at the top of the acetate column and an acetic ester fraction withdrawn at the bottom of the acetate column; and recycling the alcohol fraction at least partially to the esterification step; the process comprising no recycle from the acetate column to the low boiler column. The process provides an effective and economically viable process for preparing higher (meth)acrylic esters with a low acetate content.

公开(公告)号：US20210292270A1

公开(公告)日：2021-09-23

申请号：US16468823

申请日：2017-12-13

Applicant: BASF SE

Inventor： Ortmund LANG ,  Nadja Isabelle Desiree KLIPFEL ,  Nicole JANSSEN ,  Roland POX

IPC: C07C67/54 ,  B01D3/14 ,  B01D3/42

Abstract: Process for isolating pure cyclohexyl (meth)acrylate from a mixture comprising cyclohexyl (meth)acrylate, cyclohexanol and entrainer, by feeding or introducing the mixture is fed as side feed stream into a rectification column having a bottom vaporizer, separation-active internals and a stripping section and an enrichment section, where the column has from 4 to 50 theoretical plates, the side feed stream is introduced in the region commencing at least one theoretical plate above the bottommost theoretical plate and ending at least one theoretical plate below the uppermost theoretical plate, the pressure at the top of the column is in the range from 10 mbar to 5 bar and the reflux ratio is from 1:0.2 to 1:10, and the bottom output is fed to a further distillation unit in which the cyclohexyl (meth)acrylate is separated off at the top or at a side offtake.

公开(公告)号：US20180361270A1

公开(公告)日：2018-12-20

申请号：US15741350

申请日：2016-06-29

Applicant: BASF SE

Inventor： Norbert ASPRION ,  Bernd HEIDA ,  Jan-Oliver WEIDERT ,  Ortmund LANG

IPC: B01D3/32 ,  B01D3/14 ,  B01D3/40

Abstract: A distillation device comprising a column for separating a feed stream into a head product stream, a bottom product stream and optionally one or more side extraction streams, having three or more cells in 5 series through which fluid flows, wherein at least the first cell is integrated into the bottom of the column, for multi-stage heating and partial evaporation of the liquid flowing through the cells with the exception of the liquid from the last cell in an evaporation stage.

公开(公告)号：US20200239400A1

公开(公告)日：2020-07-30

申请号：US16636703

申请日：2018-08-13

Applicant: BASF SE

Inventor： Ortmund LANG ,  Tim BLASCHKE ,  Christian RAITH ,  Michael SCHAFRANKA ,  Claus HECHLER

IPC: C07C67/08 ,  C07C67/54

Abstract: A process for continuously preparing a butyl acrylate H2C═CH—C(═O)OR, with R=n-butyl or isobutyl, wherein aqueous 3-hydroxypropionic acid is converted under dehydrating and esterifying conditions in the presence of the corresponding butanol R—OH in a reactor with a rectification column and butyl acrylate formed, unconverted butanol and water used and formed are distilled off overhead as a ternary azeotrope, after separation into a liquid aqueous phase and liquid organic phase each of the aqueous and organic phases is at least partly discharged, and the organic phase comprising the butyl acrylate and the butanol is subjected to distillative separation.

公开(公告)号：US20200095185A1

公开(公告)日：2020-03-26

申请号：US16472018

申请日：2017-12-10

Applicant: BASF SE

Inventor： Ortmund LANG ,  Bernd METZEN ,  Claus HECHLER

IPC: C07C67/54 ,  B01D3/14 ,  B01D3/42

Abstract: A process for isolating pure butyl acrylate from crude butyl acrylate, which is carried out in a dividing wall column having separation-active internals and a vaporizer, and in which: a dividing wall is arranged in a longitudinal direction of the column to form an upper joint column region, a lower joint column region, an inflow section having a side feed point and an offtake section having a side offtake point; a ratio of an amount of liquid at an upper end of the dividing wall going to an enrichment section and a stripping section of the column is set in the range from 1:0.2 to 1:5; and a ratio of an amount of vapor streams at a lower end of the dividing wall going to the stripping section and the enrichment section of the column is set in a range from 1:0.5 to 1:2.0.

公开(公告)号：US20150329477A1

公开(公告)日：2015-11-19

申请号：US14653094

申请日：2013-12-18

Applicant: BASF SE

Inventor： Ortmund LANG ,  Norbert ASPRION ,  Axel BINDER ,  Bernd METZEN ,  Christof Wilhelm WIGBERS ,  Petr KUBANEK ,  Thomas STEINHILBER

IPC: C07C231/24 ,  B01D3/42 ,  B01D3/06

CPC classification number: C07C231/24 ,  B01D3/06 ,  B01D3/42 ,  C07C231/02 ,  C07C233/05

Abstract: What is proposed is a continuous process for discharging a solid, salt-containing phase comprising alkali metal acetates and/or alkaline earth metal acetates from the product mixture from the preparation of N,N-dimethylacetamide (DMAC) by reaction of methyl acetate (MeOAc) with dimethylamine (DMA) in the presence of a catalyst comprising N,N-dimethylacetamide (DMAC), methyl acetate (MeOAc), dimethylamine (DMA) and a catalyst, having the following process steps: level-regulated feeding of the product mixture as feed stream into an evaporation vessel of a forced circulation evaporator, flash evaporation of volatile components of the product mixture in the forced circulation evaporator to form a vapor phase comprising N,N-dimethylacetamide (DMAC) and precipitation of a solid, salt-containing phase comprising alkali metal acetates and/or alkaline earth metal acetates, recycling of the volatile components of the product mixture obtained after the flash evaporation, removal of a vapor phase comprising N,N-dimethylacetamide (DMAC) from the evaporation vessel as output stream, concentration of the solid, salt-containing phase comprising alkali metal acetates and/or alkaline earth metal acetates in the forced circulation evaporation circuit of the forced circulation evaporator, discharge of a substream comprising the solid, salt-containing phase comprising alkali metal acetates and/or alkaline earth metal acetates from the forced circulation evaporation circuit of the forced circulation evaporator, solid/liquid separation of the discharged substream in at least one separation apparatus into a solid, salt-containing phase comprising alkali metal acetates and/or alkaline earth metal acetates and a liquid phase, recycling of the liquid phase obtained after the solid/liquid separation into the forced circulation evaporation circuit as recycle stream, wherein the recycling of the volatile components of the product mixture obtained after the flash evaporation and of the solid, salt-containing phase comprising alkali metal acetates and/or alkaline earth metal acetates into the evaporation vessel is effected via an introduction section which ends within a range from 30 cm above the level surface to 20 cm below the level surface of the fill level of the evaporation vessel.

公开(公告)号：US20140135523A1

公开(公告)日：2014-05-15

申请号：US14038972

申请日：2013-09-27

Applicant: BASF SE

Inventor： Ulrich JAEGER ,  Volker SCHLIEPHAKE ,  Ortmund LANG ,  Jochen PETZOLDT ,  Tobias Johannes KORN ,  Virginie BETTE ,  Claus HECHLER

IPC: C07C67/28 ,  C07C67/62

CPC classification number: C07C67/62 ,  C07C67/08 ,  C07C67/54 ,  C07C69/52 ,  C07C69/54

Abstract: A continuous process for preparing (meth)acrylates of C10-alcohol mixtures by reaction of glacial (meth)acrylic acid with an isomer mixture of C10-alcohols composed of 2-propylheptanol as the main isomer and at least one of the C10-alcohols 2-propyl-4-methylhexanol, 2-propyl-5-methylhexanol, 2-isopropylheptanol, 2-isopropyl-4-methylhexanol, 2-isopropyl-5-methylhexanol and/or 2-propyl-4,4-dimethylpentanol, and the use of a diester of dicarboxylic acids which have been esterified with N-oxyl-containing compounds as polymerization inhibitors in such a process.

Abstract translation: 通过冰（甲基）丙烯酸与由2-丙基庚醇组成的C 10醇作为主要异构体的异构体混合物和至少一种C 10醇2来制备C10-醇混合物的（甲基）丙烯酸酯的连续方法 丙基-4-甲基己醇，2-丙基-5-甲基己醇，2-异丙基庚醇，2-异丙基-4-甲基己醇，2-异丙基-5-甲基己醇和/或2-丙基-4,4-二甲基戊醇， 的二羧酸二酯在这种方法中被N-氧基化合物酯化作为聚合抑制剂。

公开(公告)号：US20240198263A1

公开(公告)日：2024-06-20

申请号：US18288043

申请日：2022-04-19

Applicant: BASF SE

Inventor： Yunfei ZHOU ,  Ortmund LANG ,  Matthias Wilhelm MEIER ,  Cornelis Hendricus DE RUITER ,  Marvin KRAMP ,  Gregor GRACKIEWICZ ,  Josef MACHT ,  Markus GITTER ,  Claus HECHLER

IPC: B01D45/16 ,  B01D47/06

CPC classification number: B01D45/16 ,  B01D47/06

Abstract: The invention relates to a centrifugal droplet separator for separating liquid droplets out of a gas stream, comprising a shell (1) having a circular cross section and a vertical longitudinal axis (11), an upper hood (2) that bounds the shell (1) at the top and has a gas exit port (7) for the gas stream cleaned in the centrifugal droplet separator, a drip plate (8) disposed beneath the gas exit port (7), a lower hood (10) that bounds the shell (1) at the bottom and has a liquid exit port (4) for removal of the deposited liquid droplets, and an inlet (3) that opens tangentially into the shell (1) for supply of the gas stream,



wherein
there are at least two nozzles (9) for feeding a stabilizer liquid into the interior of the centrifugal droplet separator, the respective nozzle outlet (15) of which is disposed between the tangential inlet (3) and the drip plate (8) in vertical direction, where the main spraying direction (12) of the nozzles (9) is directed upward at an internal angle of 0 to 60° relative to the vertical longitudinal axis (11).




The invention additionally also relates to a method of separating liquid droplets out of a gas stream in such a centrifugal droplet separator.

公开(公告)号：US20240067596A1

公开(公告)日：2024-02-29

申请号：US18273790

申请日：2022-01-24

Applicant: BASF SE

Inventor： Ortmund LANG ,  Claus HECHLER ,  Cornelis DE RUITER ,  Marvin KRAMP ,  Dominik HERBRECHT

IPC: C07C69/54 ,  B01D1/00

CPC classification number: C07C69/54 ,  B01D1/0088

Abstract: The present invention relates to a continuous process for obtaining 2-ethylhexyl acrylate (2-EHA) from a mixture (1) that is liquid under an absolute pressure in the range from 0.5 to 100 bar and has a temperature in the range from 0 to 300° C., comprising 2-EHA, at least one high boiler, at least one homogeneous catalyst, and at least one low boiler, wherein the mixture (1) is depressurized by a pressure-maintenance device (3) to an absolute pressure level in the range from 0.1 to 10 bar, wherein the resulting two-phase gas/liquid mixture (16) is continuously supplied to a helical-tube evaporator (4) in which, at a temperature in the range from 50 to 300° C., the 2-EHA content of the liquid phase of the two-phase gas/liquid mixture is reduced by partial evaporation, this being accompanied by a parallel increase in the 2-EHA content of the gas phase of the two-phase gas/liquid mixture, and the two phases are discharged in the form of a resulting two-phase gas/liquid output stream (17).