公开(公告)号：DE102004006649A1

公开(公告)日：2005-09-01

申请号：DE102004006649

申请日：2004-02-11

Applicant: BASF AG

Inventor： RUMPF BERND ,  STROEFER ECKHARD ,  LANG ORTMUND ,  LANG NEVEN

IPC: C07C45/82 ,  C07C47/04 ,  B01D1/22

Abstract: A process for preparing a high-concentration formaldehyde solution by removing water from a lower-concentration formaldehyde solution having a formaldehyde content of from 5 to 50% by weight, in which the lower-concentration formaldehyde solution is fed to a preheater and heated in the preheater, depressurized via a pressure maintenance device and concentrated in a helical tube evaporator to give a vapor stream and the high-concentration formaldehyde solution as bottom stream, wherein the heated lower-concentration formaldehyde hyde solution is depressurized in the pressure maintenance device to give a two-phase mixture which is fed into the helical tube evaporator, is proposed.

公开(公告)号：DE10342138A1

公开(公告)日：2005-04-07

申请号：DE10342138

申请日：2003-09-12

Applicant: BASF AG

Inventor： DIEBOLD BERND ,  STURM JUERGEN ,  WEIS DIETER ,  FRANCKE DANIEL ,  FRANKE AXEL ,  NILGES JOACHIM ,  TERSTEGEN BERND ,  HENSING HEIKO ,  FOERSTER MARKUS ,  RUMPF BERND ,  WASMER KARL-HEINZ ,  DILLMANN PETER

IPC: B01J19/02 ,  C23C18/16 ,  C23C18/18

Abstract: Coating an apparatus made from high-grade steel used in a chemical installation comprises pickling surfaces to be coated using an activator heated to 40-85 [deg] C made from a mixture of 10-300 ml hydrochloric or hydrofluoric acid, 1-5 ml sulfuric acid, 1-2 g iron (III) chloride, 6-12 g nickel chloride, 10-20 ml citric acid and water, removing the activator using an inert medium and directly coating the surfaces.

公开(公告)号：ES2197710T3

公开(公告)日：2004-01-01

申请号：ES99967007

申请日：1999-12-24

Applicant: BASF AG

Inventor： HUFFER STEPHAN ,  KREBS THILO ,  LOTH WOLFGANG ,  RUMPF BERND ,  STURM JURGEN ,  DIEBOLD BERND

IPC: C08F2/01 ,  C08F10/00 ,  C23C18/16 ,  C23C18/31 ,  C23C18/34 ,  C23C18/36 ,  C23C18/40 ,  C23C18/48 ,  C23C18/50 ,  C23C18/52 ,  F28F19/02 ,  F28F19/06

Abstract: The present invention relates to a process for coating apparatuses and apparatus parts for chemical plant construction-which are taken to mean, for example, apparatus, tank and reactor walls, discharge devices, valves, pumps, filters, compressors, centrifuges, columns, dryers, comminution machines, internals, packing elements and mixing elements-wherein a metal layer or a metal/polymer dispersion layer is deposited in an electroless manner on the apparatus(es) or apparatus part(s) to be coated by bringing the parts into contact with a metal electrolyte solution which, in addition to the metal electrolyte, comprises a reducing agent and optionally the polymer or polymer mixture to be deposited in dispersed form, where at least one polymer is halogenated.

公开(公告)号：DE10122502A1

公开(公告)日：2002-11-14

申请号：DE10122502

申请日：2001-05-10

Applicant: BASF AG

Inventor： LANG ORTMUND ,  RUMPF BERND ,  FRAUENKRON MATTHIAS ,  FUNHOFF DIRK ,  MANDERBACH THOMAS ,  STEIN BERND

IPC: C07D487/04 ,  C07D487/08 ,  C07C209/86 ,  C07C211/10

Abstract: Purification of triethylene diamine (TEDA) comprises crystallization and extraction of the resulting mother liquor with an extraction agent that is at most only slightly miscible with the solvent of the mother liquor but in which TEDA is soluble. Following extraction, the treated mother liquor with reduced TEDA content and/or the extraction agent enriched in TEDA is recycled to the process. A process for the purification of triethylene diamine (TEDA) by evaporation and feeding the TEDA vapor to a liquid solvent followed by crystallization is characterized in that following crystallization of the TEDA the resulting mother liquor is extracted with an extraction agent that is at most only slightly miscible with the solvent of the mother liquor but in which TEDA is soluble. Following extraction, the treated mother liquor with reduced TEDA content and/or the extraction agent enriched in TEDA is recycled to the process.

公开(公告)号：DE10100943A1

公开(公告)日：2002-07-11

申请号：DE10100943

申请日：2001-01-10

Applicant: BASF AG

Inventor： LANG ORTMUND ,  RUMPF BERND ,  FRAUENKRON MATTHIAS ,  FUNHOFF DIRK ,  MANDERBACH THOMAS ,  STEIN BERND

IPC: C07D487/08

Abstract: A process for the production of a solution of pure triethylenediamine (TEDA) comprises evaporation of TEDA from a mixture comprising a solvent or a diluent, whereby the solvent or diluent has a boiling point of 175-250 deg C at normal pressure, and the TEDA vapor is fed into a liquid solvent.