公开(公告)号：DE10200583A1

公开(公告)日：2003-07-10

申请号：DE10200583

申请日：2002-01-09

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  SCHROEDER JUERGEN

IPC: C07C51/50 ,  C07C67/62 ,  C07C57/075 ,  C07C57/07 ,  C09K15/08 ,  C09K15/30

Abstract: A process for the stabilization of (meth)acrylic acids, (meth)acrylic acid esters and (meth)acrylamide against polymerization comprises use of a stabilizer mixture comprising at least one cerium salt, a further stabilizer compound and an oxygen containing gas. A process for the stabilization of (meth)acrylic acids, (meth)acrylic acid esters and (meth)acrylamide against polymerization comprises use of a stabilizer mixture (I) comprising: (A) at least one cerium salt; (B) a further stabilizer compound; (C) an oxygen containing gas such that cerium acetate and phenothiazine and at least one phenolic compound in the presence of an oxygen containing gas are not simultaneously added to a process for the production of acrylic acid. An Independent claim is included for the stabilizer mixture (I), optionally containing a solvent.

公开(公告)号：DE10156016A1

公开(公告)日：2003-06-05

申请号：DE10156016

申请日：2001-11-15

Applicant: BASF AG

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

IPC: C07B61/00 ,  B01D9/00 ,  C07C51/43 ,  C07C57/07

Abstract: An apparatus for separating crystals from their suspension in contaminated crystal melt with purification, in which a hydraulic wash column has distributor aids in a distributor space.

公开(公告)号：DE10213998A1

公开(公告)日：2003-03-13

申请号：DE10213998

申请日：2002-03-27

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  SCHROEDER JUERGEN ,  MCGLONE NICOLE

IPC: C07C45/33 ,  C07C45/35 ,  C07C45/38 ,  C07C45/78 ,  C07C45/82 ,  C07C45/86 ,  C07C47/22

Abstract: Purification of acrolein from a gas mixture produced by catalytic gas-phase oxidation of propane, propene, propanol and/or their precursors, by absorbing the acrolein from the cooled gas mixture with water and distilling the absorbate, comprises stabilizing the acrolein with copper and/or copper salts during absorption and/or distillation.

公开(公告)号：DE10122788A1

公开(公告)日：2002-06-06

申请号：DE10122788

申请日：2001-05-10

Applicant: BASF AG

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

IPC: C07C51/43 ,  C07C51/47 ,  C07C57/07 ,  C07D207/26 ,  C07D207/267 ,  C07B63/00 ,  B01D9/00 ,  C07D207/27

Abstract: Preparation of a purified melt of monomer(s) involves forming a suspension, crystallizing, mechanically separating off the suspended monomer crystals and further crystallizing, followed by further mechanical separation.

公开(公告)号：DE59706891D1

公开(公告)日：2002-05-08

申请号：DE59706891

申请日：1997-08-01

Applicant: BASF AG

Inventor： HEIDA BERND ,  THIESSEN FRITZ ,  HAMMON ULRICH ,  DAMS ALBRECHT

IPC: C07C51/25 ,  C07C51/48 ,  C07C57/04 ,  C07C57/05 ,  C07C57/07

Abstract: PCT No. PCT/EP97/04214 Sec. 371 Date Feb. 4, 1999 Sec. 102(e) Date Feb. 4, 1999 PCT Filed Aug. 1, 1997 PCT Pub. No. WO98/05622 PCT Pub. Date Feb. 12, 1998A process for isolating acrylic acid forward during catalytic gas phase oxidation of propene, which entails separating acrylic acid from the gas phase oxidation reaction using an absorbent containing biphenyl, diphenyl ether or dimethyl phthalate; and extracting acrylic acid from acid water of the gas phase reaction with a solvent containing biphenyl, diphenyl ether or dimethyl phthalate.

公开(公告)号：DE19927624A1

公开(公告)日：2000-12-21

申请号：DE19927624

申请日：1999-06-17

Applicant: BASF AG

Inventor： UNVERRICHT SIGNE ,  ARNOLD HEIKO ,  TENTEN ANDREAS ,  HAMMON ULRICH ,  NEUMANN HANS-PETER ,  HARTH KLAUS

IPC: C07C45/35 ,  C07C57/055 ,  C07C57/05 ,  B01J23/887

Abstract: Gas phase oxidation of propylene into acrylic acid in which the mixture of reaction gas is oxidized on a first fixed-bed catalyst and the mixture of product gas which contain acrolein oxidized on a second fixed-bed catalyst. The catalyst shaped bodies comprise an annular geometry in both reaction steps. Gas-phase oxidation of propylene in a one-stage reaction to acrolein and/or acrylic acid or in a two-stage reaction to acrylic acid is such that (i) the initial charge in both cases is \- 160 Nl propylene/l catalyst hour; (ii) the charge to the 2nd stage (if used) includes \- 140 NL acrolein/l catalyst hour ; and (iii) the catalyst or catalysts is/are of ring form with an outer diameter 2-11 mm, length 2-11 mm and a wall-thickness 1-5 mm. The process comprises (A) feeding a mixture of propylene, molecular oxygen and an inert gas with molar ratio O2 : C3H6 \- 1 at high temperature over a solid bed catalyst with characteristics (i) and (iii) above and comprising a multi-metal oxide containing Mo and/or W together with Bi, Te, Sb, Sn and/or Cu such that the propylene conversion and the combined selectivity for acrolein and the acrylic acid by-product are both \- 90 mol.%; and optionally (B) cooling the acrolein-containing gas product and optionally adding molecular O2 and/or inert gas prior to passing it at high temperature and with molar ratio O2 : acrolein \- 0.5 over a Mo- and V-containing multi-metal oxide solid bed catalyst such that the acrolein conversion is \- 90 mol.% and the combined two-stage acrylic acid selectivity (based on propylene conversion) is \- 80 mol.%.

公开(公告)号：BR9813090A

公开(公告)日：2000-08-22

申请号：BR9813090

申请日：1998-10-21

Applicant: BASF AG

Inventor： HERBST HOLGER ,  NESTLER GERHARD ,  HAMMON ULRICH

IPC: C07C51/25 ,  C07C51/44 ,  C07C51/48 ,  C07C51/50 ,  C07C57/04 ,  C07C57/055 ,  C07C57/07 ,  C07C57/075

公开(公告)号：BR9711183A

公开(公告)日：1999-08-17

申请号：BR9711183

申请日：1997-08-04

Applicant: BASF AG

Inventor： HEIDA BERND ,  THIESSEN FRITZ ,  HAMMON ULRICH

IPC: B01D17/025 ,  B01D17/02 ,  C07C51/25 ,  C07C57/04 ,  C07C57/055 ,  C07C57/07

Abstract: In a separator (11), designed to separate mixtures composed of liquids of various densities, the inflow (12) of the liquid mixture is so arranged and so designed that the inflowing liquid mixture hits an inner wall(16), located opposite the separator outflows, at an angle alpha of 0 DEG - 45 DEG relative to the normal to the container wall. Such a separator can be used in the manufacturing process for acrylic acid through catalytic vapour-phase oxidation of propene.

公开(公告)号：BR9711014A

公开(公告)日：1999-08-17

申请号：BR9711014

申请日：1997-08-04

Applicant: BASF AG

Inventor： HEIDA BERND ,  THIESSEN FRITZ ,  HAMMON ULRICH

IPC: B01D53/14 ,  B01F27/91 ,  C07B63/00 ,  C07C51/25 ,  C07C57/04 ,  C07C57/05 ,  C07C57/07 ,  B01F7/18

Abstract: Mixing device for the blending of at least two liquid phases, containing a housing (1) with an inside diameter D, in which at least one agitator (2) is equipped with two to five segment shaped blades presenting a radius of curvature K, in which the circular area inside the housing (1), covered by the rotating agitators, has a diameter E, and in which K ranges from 0.10*D to 0.30*D, preferably from 0.125*D to 0.25*D, and E ranges from 0.35*D to 0.65*D, preferably from 0.45*D to 0.55*D.

公开(公告)号：BR9709866A

公开(公告)日：1999-08-10

申请号：BR9709866

申请日：1997-06-19

Applicant: BASF AG

Inventor： SCHLIEPHAKE VOLKER ,  HAMMON ULRICH ,  PIES WOLFGANG ,  RAUH ULRICH

IPC: F23G7/06 ,  C07C51/42 ,  C07C57/04 ,  C07C57/07 ,  F23D17/00 ,  F23G5/00 ,  F23G7/04

Abstract: In a process for the disposal of low, mediun, and high-boiling secondary components formed during the preparation of (meth)acrylic acid the gaseous low-boiling secondary components are burned, whilst low-boiling and medium-boiling secondary components that are dissolved in water optionally together with high-boiling secondary components treated with solvent are added.