公开(公告)号：PL314547A1

公开(公告)日：1996-12-09

申请号：PL31454796

申请日：1996-05-30

Applicant: BASF AG

Inventor： KROENER RUDI ,  LEUTNER BERND ,  SCHNEIDER HANS-MICHAEL ,  FRIEDRICH HOLGER ,  HECKY KURT ,  SCHLAEFER DIETER ,  STEINER WOLFGANG

IPC: C25B13/00 ,  C25B15/00

Abstract: Regenerating plastic diaphragms comprises mixing a soln. of mineral acid (I) with a corrosion inhibitor (II) and passing the mixt. through the diaphragm for 0.1-84 (pref. 1-72, esp. pref. 2-24) hrs. at 0-100 (pref. 40-80, esp. pref. 50-70) degrees C. Also claimed are plastic diaphragms obtd. by this process. (I) consists at least partly, pref. entirely, of HCl in a concn. of 0.3-20 (pref. 2-10) wt%, pref. contg. NaCl in a concn. up to the satn. pt., pref. up to 250 g/l. Pref. soln. (I) also contains 500-5000 ppm Cu and/or Fe cpds., esp. Cu(II) and/or Fe(III) salts. The mixt. contains 0.005-5 (pref. 0.05-0.5) wt% (II). Component (II) contains alkynol(s), esp. an alkyne-diol, pref. mixed with 1-25 wt% amine, esp. hexamethylenetetramine (HMTA), ethylhexylamine or diethylhexylamine, and/or 0.1-3 wt% surfactant, esp. a quat. ammonium salt.

公开(公告)号：DE59905070D1

公开(公告)日：2003-05-22

申请号：DE59905070

申请日：1999-01-22

Applicant: BASF AG

Inventor： KAPPES ELISABETH ,  BRODT GREGOR ,  KROENER RUDI ,  WAGNER NORBERT ,  BOGENSTAETTER THOMAS ,  HILDEBRANDT SOEREN

IPC: C07B45/02 ,  C07D213/20

Abstract: Described is a process for preparing 1-(2-sulfoethyl)pyridinium betaine wherein pyridine is reacted with a sulfoethylating agent from the group consisting of carbyl sulfate, ethionic acid and its salt and vinylsulfonic acid and vinylsulfonate, the reaction taking place in aqueous solution or in pyridine.

公开(公告)号：PL312289A1

公开(公告)日：1996-07-22

申请号：PL31228996

申请日：1996-01-12

Applicant: BASF AG

Inventor： KROENER RUDI ,  LEUTNER BERND ,  SCHLAEFER DIETER ,  STEINER WOLFGANG ,  FRIEDRICH HOLGER

IPC: C25B13/00

Abstract: Process for recycling diaphragms comprises crushing and washing with a washing substrate (I) to produce re-usable material.