中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

144 records (took 0.023 seconds)

    HIGHLY CONCENTRATED FORMALDEHYDE SOLUTION, PRODUCTION AND REACTION THEREOF
    131.
    发明专利
    HIGHLY CONCENTRATED FORMALDEHYDE SOLUTION, PRODUCTION AND REACTION THEREOF 未知

    公开(公告)号：HU0402363A2

    公开(公告)日：2005-02-28

    申请号：HU0402363

    申请日：2002-11-05

    Applicant: BASF AG

    Inventor： STROEFER ECKHARD ,  SOHN MARTIN ,  HASSE HANS ,  SCHILLING KLEMENS

    IPC: C07C45/86 ,  C07C31/02 ,  C07C31/20 ,  C07C45/79 ,  C07C45/82 ,  C07C47/04 ,  C07C47/058

    Abstract: In an aqueous formaldehyde solution comprising formaldehyde in the form of monomeric formaldehyde, methylene glycol and polyoxymethylene glycols in a total concentration x of >=65% by weight, the mean molar mass {overscore (M of the polyoxymethylene glycols is, as a function of the formaldehyde concentration, equal to or less than the values given by equation I: ( M _ g ⁢ / ⁢ mol ) = 48 + 6.589 . 10 - 1 . ( x % ⁢ ⁢ by ⁢ ⁢ weight ) + 4.725 . 10 2 . ⁢ ( x % ⁢ ⁢ by ⁢ ⁢ weight ) 2 - 3.434 . 10 - 3 . ( x % ⁢ ⁢ by ⁢ ⁢ weight ) 3 + ⁢ 9.625 . 10 - 5 . ( x % ⁢ ⁢ by ⁢ ⁢ weight ) 4 - 1.172 . 10 6 . ⁢ ( x % ⁢ ⁢ by ⁢ ⁢ weight ) 5 + 5.357 . 10 - 9 . ( x % ⁢ ⁢ by ⁢ ⁢ weight ) 6 ( I ) where: {overscore (M is the mean molar mass, and x is the total concentration of formaldehyde in the form of monomeric formaldehyde, methylene glycol and polyoxymethylene glycols in % by weight (total formaldehyde concentration).

    132.
    发明专利
    未知

    公开(公告)号：DE10309288A1

    公开(公告)日：2004-09-16

    申请号：DE10309288

    申请日：2003-03-04

    Applicant: BASF AG

    Inventor： STROEFER ECKHARD ,  LANG NEVEN ,  STEINBRENNER ULRICH ,  HASSE HANS ,  OTT MICHAEL ,  GRUETZNER THOMAS

    IPC: C07C45/00 ,  C07C45/82 ,  C07C47/058 ,  C02F1/08

    Abstract: Process for preparing high-concentration gaseous formaldehyde having a molar CH 2 O:H 2 O ratio of >=0.6 from an aqueous formaldehyde solution by evaporation of at least part of the solution, in which the aqueous formaldehyde solution is heated to a vaporization temperature T and the gas phase formed is taken off, wherein the evaporation temperature T obeys the relationship: T[° C.]>=T' min [° C.] where T' min (c)=A+Bx(c/100)+Cx(c/100) 2 +Dx(c/100) 3 and A=+68.759, B=+124.77, C=-12.851, D=-10.095, where c is the instantaneous CH 2 O content of the aqueous formaldehyde solution during the evaporation in percent by weight and is from 20 to 99% by weight.

    134.
    发明专利
    未知

    公开(公告)号：AT273265T

    公开(公告)日：2004-08-15

    申请号：AT01915134

    申请日：2001-01-12

    Applicant: BASF AG

    Inventor： AUER HEINZ ,  BESSLING BERND ,  HAMMER HANS ,  HASSE HANS ,  SAUER FRIEDRICH ,  VICARI MAXIMILIAN ,  ADRIAN TILL

    IPC: C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C53/02

    Abstract: The invention relates to a process for obtaining anhydrous or substantially anhydrous formic acid, in which firstly aqueous formic acid is produced by hydrolysis of methyl formate, with the methanol content in the methyl formate having been reduced in advance. The process according to the invention has the special feature that-before the hydrolysis of the methyl formate-the methanol content of the methanol-containing methyl formate is reduced in a distillation column, this distillation column simultaneously being employed for other separation functions during work-up of the formic acid.

    138.
    发明专利
    未知

    公开(公告)号：NO20023514D0

    公开(公告)日：2002-07-23

    申请号：NO20023514

    申请日：2002-07-23

    Applicant: BASF AG

    Inventor： AUER HEINZ ,  BESSLING BERND ,  HAMMER HANS ,  HASSE HANS ,  SAUER FRIEDRICH ,  VICARI MAXIMILIAN ,  ADRIAN TILL

    IPC: C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C53/02 ,  C07C

    Abstract: The invention relates to a process for obtaining anhydrous or substantially anhydrous formic acid, in which firstly aqueous formic acid is produced by hydrolysis of methyl formate, with the methanol content in the methyl formate having been reduced in advance. The process according to the invention has the special feature that-before the hydrolysis of the methyl formate-the methanol content of the methanol-containing methyl formate is reduced in a distillation column, this distillation column simultaneously being employed for other separation functions during work-up of the formic acid.

Patent Agency Ranking