公开(公告)号：DE2345461A1

公开(公告)日：1975-03-27

申请号：DE2345461

申请日：1973-09-08

Applicant: BASF AG

Inventor： SCHIER ERNST-JUERGEN DIPL CHEM ,  NOHE HEINZ DIPL-CHEM DR ,  BECK FRITZ DIPL-CHEM DR ,  DIETMAR WERNER DIPL-CHEM DR

IPC: C25B3/29 ,  C07C31/20

Abstract: Pinacol is prepd. by the electrolhydro-dimerisation of acetone in partitioned cell using as electrolyte a catholyte contg. 10-90 wt % acetone, 1-60 wt % water and 1-50 wt % to a quat. ammonium salt. The pref. amts. are 40-80 wt %, 5-30 wt % and 5-20 wt % respectively. The cell is pref. divided by porous membranes of cation exchangers e.g. sulphonated reticulated polystyrene. The anode may be Pb coated with PbO2, graphite or Ti esp. in combination with 1-10 wt % H2SO4 as anolyte. The cathode may be Cu, Ag, Cd, Zn, Sn, Pb, Tl or Hg but is pref. graphite or a plastic matl. filled with graphite. The quat. cpd. is e.g. of formula (I): (where R1-4 are each 1-6C alkyl, aryl or aralkyl and X- is an anion such as sulphate, alkylsulphate, phosphate, carbonate, tosylate, BF4-, SiF6- halide or perchlorate). Process may be continuous or discontinuous, give improved yields per unit of current over known methods and avoids the necessity of neutralising acids in soln.

公开(公告)号：DE2336288A1

公开(公告)日：1975-02-20

申请号：DE2336288

申请日：1973-07-17

Applicant: BASF AG

Inventor： BECK FRITZ DIPL-CHEM DR ,  HEISS JUERGEN DIPL-ING DR

IPC: C25B3/23 ,  C07D301/04 ,  C25B9/17 ,  C07D303/04

Abstract: 1467864 Making expoxidized olefinic compounds by electrolysis BASF AG 16 July 1974 [17 July 1973] 31398/74 Heading C2C [Also in Division C7] Olefin oxide compounds are made by direct electrochemical conversion of an olefinic compound (optionally inertly substituted) via the unisolated intermediate halohydrin in an undivided cell with an electrode gap of 0À05-2À0 mm. An aqueous bromide or chloride electrolyte of 0À1-10% by wt. and having a cation not depositable by electrolysis, e.g. KI, is used at a c.d. of 0À1-100 A/dm. 2 with a volume ratio of olefinic compound : electrolyte of 1 : 100 to 1 : 1 when the olefin is gaseous. The electrolyte flow velocity may be 1-1000 cm./sec., the ratio of olefin feed : theoretical olefin consumption 1 : 1 to 100 : 1, the temperature 0-100‹ C., pH 3-12 and pressure 1-100 At. The electrolyte may include an inert conductive salt, e.g. Na 2 SO 4 or NaClO 4 and an organic solvent, e.g. acetic acid, DMF or dioxane. The olefin treated may be ethylene, propylene, 1- or 2-butylene, allyl chloride, styrene, cyclohexene or pyrroline-3. A working concentration of 0À01-20% of oxide may be maintained in the electrolyte. Batch or continuous operation is possible. The anode may be graphite, graphite filled plastic, magnetite, a Pt group metal or metal oxide, Pt foil bonded to graphite or Ti via graphite-filled adhesive, a Ti/TiO 2 /RuO 2 ceramic or RuO 2 -activated Ti bonded to graphite. A cathode of graphite, steel, G-Ni steel, Cu, Fe, Ti or Pb may be used.

公开(公告)号：DE2343054B1

公开(公告)日：1975-02-06

申请号：DE2343054

申请日：1973-08-25

Applicant: BASF AG

Inventor： NOHE HEINZ DIPL-CHEM DR ,  BECK FRITZ DIPL-CHEM DR

IPC: C25B3/29 ,  C25B3/04

Abstract: Pinacols are prepared by electrolytic hydrodimerization of carbonyl compounds in non-compartmented cells using a mixture of from 5 to 75% by weight of the carbonyl compound, from 5 to 90% by weight of the alcohol corresponding to the carbonyl compound, from 0.1 to 3% by weight of a quaternary ammonium salt and from 0 to 30% by weight of water.