公开(公告)号：DE10332758A1

公开(公告)日：2004-05-27

申请号：DE10332758

申请日：2003-07-17

Applicant: BASF AG

Inventor： ECK BERND ,  HAMMON ULRICH ,  MUELLER-ENGEL KLAUS JOACHIM ,  SCHROEDER JUERGEN ,  THIEL JOACHIM ,  MARTAN HANS

IPC: B01D3/14 ,  B01D3/32 ,  C07C51/215 ,  C07C51/25 ,  C07C51/43 ,  C07C51/44 ,  C07C57/07 ,  C07C57/05

Abstract: A thermal separation process for the separation of at least one (meth)acrylic monomer enriched material stream from a (meth)acrylic monomer containing mixture comprises use of a device having separate volume elements in which the liquid temperature does not differ by more than 2 degreesC and the total residence time is no greater than 20 hours. A thermal separation process for the separation of at least one (meth)acrylic monomer enriched material stream from a (meth)acrylic monomer containing mixture, comprising the continuous stationary operation of at least one thermal separation device comprising at least one separating chamber optionally containing inserts to which at least one (meth)acrylic monomer containing stream is removed whereby the material stream that is fed to the separator chamber contains x wt.% of components that are different to (meth)acrylic monomers; the material stream having the highest content by weight of (meth)acrylic monomers that is removed from the separator chamber contains y wt.% of components that are different to (meth)acrylic monomers whereby the ratio x:y is at least 5; the separator chamber, excluding inlets and outlets is bordered by a solid phase, comprises at least one recirculating heat exchanger and has a liquid phase filled total volume of at least 1 m3 whereby the temperature of the liquid phase is at least 80 degreesC; and is characterized by subdivision of the separating cavity into n individual volume elements whereby the highest and lowest temperature in the liquid phase within the separate volume elements does not differ by more than 2 degreesC; the total residence time is as defined by equation (1) and is no greater than 20 hours. tges = integral(i=1 to n) msi/mi x 2A (1) To = 100 degreesC; Ti = the arithmetic mean value of the highest and lowest temperature in i volume elements; msi = the total mass of (meth)acrylic monomers in i volume elements containing liquid phase; mi = the total liquid phase mass flow from i volume element. The total amount of liquid phase contained within dead-volume elements is not greater than 5 wt.% of the total liquid phase within the separator chamber.

公开(公告)号：DE10232482A1

公开(公告)日：2004-01-29

申请号：DE10232482

申请日：2002-07-17

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  MESCHKE JOCHEN ,  RAUH ULRICH ,  MUELLER-ENGEL KLAUS JOACHIM ,  SCHLEMMER PETER

IPC: B01J4/00 ,  C07B61/00 ,  C07C45/33 ,  C07C45/34 ,  C07C45/35 ,  C07C47/22 ,  C07C51/215 ,  C07C51/25 ,  C07C57/05 ,  C07B33/00 ,  C07B41/00

公开(公告)号：DE10223058A1

公开(公告)日：2003-12-11

申请号：DE10223058

申请日：2002-05-24

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  BAUMANN DIETER ,  HEILEK JOERG ,  MUELLER-ENGEL KLAUS JOACHIM ,  ECK BERND

IPC: B01D9/00 ,  C07C7/14 ,  C07C57/07 ,  C07D207/26 ,  C07D207/267 ,  C08G69/24 ,  C08L39/06

Abstract: Process for the separation of crystals from suspension in a mother liquor comprises addition of the suspension to a wash column having a wall enveloping a process chamber. The wall is of metal and the face away from the process chamber is heated along at least the length of the purified melt zone. A process for the separation of crystals from suspension in a mother liquor comprises: (a) addition of the suspension to a wash column having a wall enveloping a process chamber, (b) feeding of the suspension to the process chamber to form a bed of crystals in the chamber and (c) conveying of the bed of crystals in the process chamber by means of gravity with a counter current flow of a purified melt of the crystals to form a wash front such that the bed of crystals is partitioned into a mother liquor zone and a purified melt zone. The wall is of metal and is heated on the face away from the process chamber along at least the length of the purified melt zone.

公开(公告)号：DE10219686A1

公开(公告)日：2003-11-13

申请号：DE10219686

申请日：2002-05-02

Applicant: BASF AG

Inventor： BERNDT SILKE ,  MUELLER-ENGEL KLAUS JOACHIM ,  SCHINDLER GOETZ-PETER ,  ROSOWSKI FRANK ,  PETZOLDT JOCHEN

IPC: B01J27/199 ,  C07C45/33 ,  C07C45/35 ,  C07C45/28 ,  C07C47/22

Abstract: Providing a process for the production of methacrolein from isobutane. A process for the production of methacrolein from isobutane comprises: (A) partial, selective, heterogeneously catalyzed dehydrogenation of isobutane in the gas phase in a reaction zone (A) to form a mixture of isobutene and unreacted isobutane; (B) transport of the gas mixture to a reaction zone (B) followed by a selective heterogeneously catalyzed partial oxidation with molecular oxygen in the gas phase to form a methacrolein containing product mixture; (C) the methacrolein in the product mixture from (B) is either used for the production of methacrylic acid or other purpose and the non-reacted isobutane is either recycled to reaction zone (A) or used for another purpose and is characterized in that the molar ratio of molecular oxygen to molecular nitrogen is 1:1-1:10.

公开(公告)号：DE10221500A1

公开(公告)日：2003-06-18

申请号：DE10221500

申请日：2002-05-14

Applicant: BASF AG

Inventor： BOEHLING RALF ,  ADAMI CHRISTOPH ,  MUELLER-ENGEL KLAUS JOACHIM ,  MEYER GERALD ,  MACHHAMMER OTTO ,  ZEHNER PETER

IPC: C07C51/25 ,  C07C51/36 ,  C07C67/303 ,  C07C53/122 ,  C07C69/18

Abstract: Production of propionic acid (or its ester) from acrylic acid (or its ester) comprises: (1) partial dehydrogenation of propane to give a mixture (A); (2) partial oxidation of propylene in (A) to form a mixture (B); and (3) hydrogenation of the acrylic acid in (B) (directly and/or after esterification) to form a mixture (C). At least part of the hydrogen used in step (3) is that formed in step (1). Production of propionic acid (or its ester) from acrylic acid (or its ester) comprises: (1) heterogeneously catalyzed partial dehydrogenation of propane in a first reaction zone, to give a product gas mixture (A) containing molecular hydrogen, propylene and unconverted propane; (2) charging the propylene in (A) to a second reaction zone, in which the propylene is subjected to selective, heterogeneously catalyzed partial gas phase oxidation with molecular oxygen to form a product gas mixture (B) containing acrylic acid; and (3) charging the acrylic acid in (B) (directly and/or after esterification) to a third reaction zone, in which the acrylic acid (or ester) is hydrogenated with molecular hydrogen to form a product gas mixture (C) containing propionic acid and/or its ester. At least part of the hydrogen used in step (3) is that formed in step (1).

公开(公告)号：DE10119933A1

公开(公告)日：2002-10-24

申请号：DE10119933

申请日：2001-04-23

Applicant: BASF AG

Inventor： BORGMEIER FRIEDER ,  TENTEN ANDREAS ,  HIBST HARTMUT ,  MUELLER-ENGEL KLAUS JOACHIM ,  UNVERRICHT SIGNE ,  COX GERHARD

IPC: B01J23/00 ,  B01J23/28 ,  B01J27/057 ,  B01J37/02 ,  C07C45/33 ,  C07C45/35 ,  C07C57/05

Abstract: Acrolein and acrylic acid are produced from propane and propene by absorption/desorption of propane and propene from a gas mixture followed by oxidation, in which no heterogeneously catalyzed dehydrogenation of propane occurs between the desorption and oxidation stages without addition of oxygen. Acrolein and acrylic acid are produced from propane and propene by: (a) separation of propane and propene from a gas mixture (A) by absorption in an absorption medium; (b) separation of propane and propene from the absorbent to give a mixture (B) containing propane and propene; and (c) using mixture (B) for oxidation to the required product(s). In this process, no catalytic dehydrogenation of propane without the addition of oxygen is carried out between stages (b) and (c).

公开(公告)号：DE10034825A1

公开(公告)日：2002-01-31

申请号：DE10034825

申请日：2000-07-18

Applicant: BASF AG

Inventor： BORGMEIER FRIEDER ,  TENTEN ANDREAS ,  HIBST HARTMUT ,  MUELLER-ENGEL KLAUS JOACHIM ,  UNVERRICHT SIGNE ,  COX GERHARD

IPC: B01J23/00 ,  B01J23/28 ,  B01J27/057 ,  B01J37/02 ,  C07C45/33 ,  C07C45/35 ,  C07C57/05 ,  B01J23/16

Abstract: Acrolein and acrylic acid are produced from propane and propene by absorption/desorption of propane and propene from a gas mixture followed by oxidation, in which no heterogeneously catalyzed dehydrogenation of propane occurs between the desorption and oxidation stages without addition of oxygen. Acrolein and acrylic acid are produced from propane and propene by: (a) separation of propane and propene from a gas mixture (A) by absorption in an absorption medium; (b) separation of propane and propene from the absorbent to give a mixture (B) containing propane and propene; and (c) using mixture (B) for oxidation to the required product(s). In this process, no catalytic dehydrogenation of propane without the addition of oxygen is carried out between stages (b) and (c).

公开(公告)号：DE19955168A1

公开(公告)日：2001-05-17

申请号：DE19955168

申请日：1999-11-16

Applicant: BASF AG

Inventor： TENTEN ANDREAS ,  HIBST HARTMUT ,  MACHHAMMER OTTO ,  HECHLER CLAUS ,  MUELLER-ENGEL KLAUS JOACHIM ,  UNVERRICHT SIGNE

IPC: C07C51/215 ,  C07B61/00 ,  C07C51/25 ,  C07C57/04 ,  C07C57/05

Abstract: The invention relates to a method for carrying out the two-stage catalytic gas phase oxidation of propene to form acrylic acid. The inventive method provides that, in a multitube fixed-bed reactor, the reaction gas starting mixture having a propene load >/= 160 Nl propene / l.h is firstly conducted over a fixed-bed catalyst feed material (1), which is located in two successive temperature zones A, B, and afterwards, is conducted over a fixed-bed catalyst feed material (2), which is accommodated either in another temperature zone C or in two additional temperature zones D, E. The temperature of zone A is maintained at a lower temperature than that of zone B, and the temperature of zone D is maintained at a lower temperature than that of zone E.

公开(公告)号：DE19856565A1

公开(公告)日：2000-06-15

申请号：DE19856565

申请日：1998-12-08

Applicant: BASF AG

Inventor： SUTORIS HEINZ FRIEDRICH ,  WAGENBLAST GERHARD ,  SCHLIEPHAKE VOLKER ,  SCHROEDER JUERGEN ,  MUELLER-ENGEL KLAUS JOACHIM ,  JAWOREK THOMAS ,  KELLER HARALD

IPC: C07C45/86 ,  C07B63/04 ,  C07C47/22 ,  C07C51/50 ,  C07C51/64 ,  C07C57/075 ,  C07C67/62 ,  C07C69/54 ,  C01B25/163 ,  C07C291/04 ,  C07D211/94 ,  C07F9/141

Abstract: A method for stabilizing chemical compounds containing at least one ethylenically unsaturated bond in order to prevent undesirable radical polymerization, whereby a nitroxyl radical and a chemical compound containing chemically bonded phosphorus are added to an unsaturated compound existing in the form of a pure substance or constituent in a mixture.

公开(公告)号：BRPI0607497A2

公开(公告)日：2010-04-06

申请号：BRPI0607497

申请日：2006-03-01

Applicant: BASF AG

Inventor： HEILEK JOERG ,  MUELLER-ENGEL KLAUS JOACHIM ,  ADAMI CHRISTOPH ,  DIETERLE MARTIN

IPC: C07C51/573 ,  C07C57/04

Abstract: The invention relates to a method for separating methacrolein from acrylic acid as the main constituent and from a liquid phase P containing methacrolein as a minor constituent, in addition to a target product. According to said method, the separation takes place by crystallisation, whereby the acrylic acid is concentrated in the formed crystallisate and the methacrolein is concentrated in the remaining mother liquor.