公开(公告)号：DE59006008D1

公开(公告)日：1994-07-14

申请号：DE59006008

申请日：1990-08-03

Applicant: BASF AG

Inventor： JOERG KLAUS DR ,  KUMMER RUDOLF DR ,  MUELLER FRANZ-JOSEF DR

IPC: B01J27/122 ,  B01J31/02 ,  C07B61/00 ,  C07C68/00 ,  C07C69/96

Abstract: Process for the preparation of dialkyl carbonates of the general formula I in which R represents a C1- to C10-alkyl group, by reacting the alcohols R OH with a gaseous carbon monoxide/oxygen mixture in the presence of a copper catalyst and of a cosolvent, at increased temperature and under increased pressure, in which the cosolvent used is a cyclic urea of the general formula II in which n is the number 2, 3 or 4 and R represents hydrogen or a C1- to C4-alkyl group.

公开(公告)号：DE59505892D1

公开(公告)日：1999-06-17

申请号：DE59505892

申请日：1995-10-06

Applicant: BASF AG

Inventor： EGLY HORST ,  DIEHL VOLKER DR ,  JOERG KLAUS DR

IPC: C07C57/05 ,  C07C51/42 ,  C07C51/48 ,  C07C57/04 ,  C07C57/07

公开(公告)号：DE4214028A1

公开(公告)日：1993-11-04

申请号：DE4214028

申请日：1992-04-29

Applicant: BASF AG

Inventor： STAHL STEFAN DR ,  MAYWALD VOLKER DR ,  JOERG KLAUS DR

IPC: C07C67/343 ,  C07C69/716

Abstract: In the prodn. of (cyclo)aliphatic beta-ketoesters (I) by reacting a (cyclo)aliphatic methyl ketone (II) with a dialkyl carbonate (III) and a molar excess of alkali metal (m)ethylate (IV) w.r.t. (II), followed by hydrolysis and neutralisation of the reaction prod., the (IV):(II) molar ratio is (1.6-6):1 and the reaction mixt. contains no hexamethyl-phosphoryl triamide (HMPT) as solvent. Pref. (II) is isopropyl methyl ketone (IIA); (III) dimethylcarbonate (IIIA); and (IV) NaOMe. Excess (III) is use, which is expensive and can only be re-used after costly purificn. stages. USE/ADVANTAGE - (I) are valuable intermediates, e.g. for the synthesis of herbicides by base-induced reaction with a hydroxyamic acid chloride to isoxazole derivs. (I) are obtd. in good yields, without the need to use HMPT.

公开(公告)号：DE3926709A1

公开(公告)日：1991-02-14

申请号：DE3926709

申请日：1989-08-12

Applicant: BASF AG

Inventor： JOERG KLAUS DR ,  MUELLER FRANZ-JOSEF DR ,  HARDER WOLFGANG DR ,  KUMMER RUDOLF DR

IPC: B01J27/122 ,  B01J31/02 ,  C07B61/00 ,  C07C68/00 ,  C07C69/96

Abstract: A process for the continuous synthesis of dialkyl carbonates of the general formula I (I) in which R denotes C1-C4-alkyl, by reaction of C1-C4-alkanols with carbon monoxide and oxygen at elevated temperature and pressure and in the presence of a copper-containing catalyst dissolved or suspended in the reaction medium, wherein a) a gas stream containing carbon monoxide and oxygen is bubbled through the alkanol/catalyst mixture present in the reactor at a rate of from 1 to 100 liters per hours per gram of copper present in the reactor, part of which gas stream reacts with the alkanol to form dialkyl carbonate and water, which components are continuously entrained, together with alkanol, as a gaseous mixture, from the reaction mixture by means of the remaining, unreacted portion of the carbon monoxide/oxygen gas stream, whereupon b) the resulting gaseous mixture is separated, in a separator, into gaseous and liquid phases, the gaseous phase being recycled to the reactor if desired, and c) the liquid phase, which essentially consists of dialkyl carbonate, water and alkanol, is separated into its components, the dialkyl carbonate being isolated and the alkanol, if desired, recycled to the reactor, and d) the liquid in the reactor is replenished by adding fresh or recycled alkanol at the rate at which the alkanol is consumed and discharged.

公开(公告)号：ES2051418T3

公开(公告)日：1994-06-16

申请号：ES90114910

申请日：1990-08-03

Applicant: BASF AG

Inventor： JOERG KLAUS DR ,  MUELLER FRANZ-JOSEF DR ,  HARDER WOLFGANG DR ,  KUMMER RUDOLF DR

IPC: B01J27/122 ,  B01J31/02 ,  C07B61/00 ,  C07C68/00 ,  C07C69/96

Abstract: A process for the continuous synthesis of dialkyl carbonates of the general formula I (I) in which R denotes C1-C4-alkyl, by reaction of C1-C4-alkanols with carbon monoxide and oxygen at elevated temperature and pressure and in the presence of a copper-containing catalyst dissolved or suspended in the reaction medium, wherein a) a gas stream containing carbon monoxide and oxygen is bubbled through the alkanol/catalyst mixture present in the reactor at a rate of from 1 to 100 liters per hours per gram of copper present in the reactor, part of which gas stream reacts with the alkanol to form dialkyl carbonate and water, which components are continuously entrained, together with alkanol, as a gaseous mixture, from the reaction mixture by means of the remaining, unreacted portion of the carbon monoxide/oxygen gas stream, whereupon b) the resulting gaseous mixture is separated, in a separator, into gaseous and liquid phases, the gaseous phase being recycled to the reactor if desired, and c) the liquid phase, which essentially consists of dialkyl carbonate, water and alkanol, is separated into its components, the dialkyl carbonate being isolated and the alkanol, if desired, recycled to the reactor, and d) the liquid in the reactor is replenished by adding fresh or recycled alkanol at the rate at which the alkanol is consumed and discharged.

公开(公告)号：DE59005420D1

公开(公告)日：1994-05-26

申请号：DE59005420

申请日：1990-08-03

Applicant: BASF AG

Inventor： JOERG KLAUS DR ,  MUELLER FRANZ-JOSEF DR ,  HARDER WOLFGANG DR ,  KUMMER RUDOLF DR

IPC: B01J27/122 ,  B01J31/02 ,  C07B61/00 ,  C07C68/00 ,  C07C69/96

Abstract: A process for the continuous synthesis of dialkyl carbonates of the general formula I (I) in which R denotes C1-C4-alkyl, by reaction of C1-C4-alkanols with carbon monoxide and oxygen at elevated temperature and pressure and in the presence of a copper-containing catalyst dissolved or suspended in the reaction medium, wherein a) a gas stream containing carbon monoxide and oxygen is bubbled through the alkanol/catalyst mixture present in the reactor at a rate of from 1 to 100 liters per hours per gram of copper present in the reactor, part of which gas stream reacts with the alkanol to form dialkyl carbonate and water, which components are continuously entrained, together with alkanol, as a gaseous mixture, from the reaction mixture by means of the remaining, unreacted portion of the carbon monoxide/oxygen gas stream, whereupon b) the resulting gaseous mixture is separated, in a separator, into gaseous and liquid phases, the gaseous phase being recycled to the reactor if desired, and c) the liquid phase, which essentially consists of dialkyl carbonate, water and alkanol, is separated into its components, the dialkyl carbonate being isolated and the alkanol, if desired, recycled to the reactor, and d) the liquid in the reactor is replenished by adding fresh or recycled alkanol at the rate at which the alkanol is consumed and discharged.

公开(公告)号：DE59004601D1

公开(公告)日：1994-03-24

申请号：DE59004601

申请日：1990-10-26

Applicant: BASF AG

Inventor： JOERG KLAUS DR ,  MUELLER FRANZ-JOSEF DR ,  IRGANG MATTHIAS DR ,  MAROSI LASZLO DR ,  BORCHERT GERHARD

IPC: C07C67/00 ,  C07C67/40 ,  C07C69/06

Abstract: Process for the preparation of methyl formate by reaction of methanol on copper-containing catalysts at elevated temperature and in the gas phase by using a catalyst containing, apart from 30 to 80% by weight of copper, calculated as CuO, 20 to 70% by weight of magnesium silicates, calculated as MgO plus SiO2 in which the MgO/SiO2 molar ratio is 0.3 to 1.5, and which can be additionally doped with the metals zinc, chromium and/or barium in amounts of, in each case, up to 1.5% by weight, calculated as ZnO, Cr2O3 and BaO.

公开(公告)号：DE3936854A1

公开(公告)日：1991-05-08

申请号：DE3936854

申请日：1989-11-06

Applicant: BASF AG

Inventor： JOERG KLAUS DR ,  MUELLER FRANZ-JOSEF DR ,  IRGANG MATTHIAS DR ,  MAROSI LASZLO DR ,  BORCHERT GERHARD

IPC: C07C67/00 ,  C07C67/40 ,  C07C69/06

Abstract: Process for the preparation of methyl formate by reaction of methanol on copper-containing catalysts at elevated temperature and in the gas phase by using a catalyst containing, apart from 30 to 80% by weight of copper, calculated as CuO, 20 to 70% by weight of magnesium silicates, calculated as MgO plus SiO2 in which the MgO/SiO2 molar ratio is 0.3 to 1.5, and which can be additionally doped with the metals zinc, chromium and/or barium in amounts of, in each case, up to 1.5% by weight, calculated as ZnO, Cr2O3 and BaO.

公开(公告)号：DE4436243A1

公开(公告)日：1996-04-18

申请号：DE4436243

申请日：1994-10-11

Applicant: BASF AG

Inventor： EGLY HORST ,  DIEHL VOLKER DR ,  JOERG KLAUS DR

IPC: C07C57/05 ,  C07C51/42 ,  C07C51/48 ,  C07C57/04 ,  C07C57/07

公开(公告)号：ES2054176T3

公开(公告)日：1994-08-01

申请号：ES90114912

申请日：1990-08-03

Applicant: BASF AG

Inventor： JOERG KLAUS DR ,  KUMMER RUDOLF DR ,  MUELLER FRANZ-JOSEF DR

IPC: B01J27/122 ,  B01J31/02 ,  C07B61/00 ,  C07C68/00 ,  C07C69/96

Abstract: Process for the preparation of dialkyl carbonates of the general formula I in which R represents a C1- to C10-alkyl group, by reacting the alcohols R OH with a gaseous carbon monoxide/oxygen mixture in the presence of a copper catalyst and of a cosolvent, at increased temperature and under increased pressure, in which the cosolvent used is a cyclic urea of the general formula II in which n is the number 2, 3 or 4 and R represents hydrogen or a C1- to C4-alkyl group.