中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

15 records (took 0.021 seconds)

    Preparation of 1,6-hexan:diol and epsilon-caprolactone from carboxylic acid mixture
    1.
    发明专利
    Preparation of 1,6-hexan:diol and epsilon-caprolactone from carboxylic acid mixture 未知

    公开(公告)号：DE19647349A1

    公开(公告)日：1998-05-20

    申请号：DE19647349

    申请日：1996-11-15

    Applicant: BASF AG

    Inventor： BAUR KARL GERHARD DR ,  FISCHER ROLF DR ,  PINKOS ROLF DR ,  STEIN FRANK DR ,  RUST HARALD ,  BREITSCHEIDEL BODO DR

    IPC: C07C29/149 ,  C07D315/00 ,  C07C31/20 ,  C07C29/136 ,  C07C29/74 ,  C07C29/80 ,  C07C29/88 ,  C07C69/48 ,  C07C69/675 ,  C07D313/04

    Abstract: Preparation of 2,6-hexandiol and iota -caprolactone from a carboxylic acid mixture containing adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexandiols. The mixture is obtained as a by-product of the oxidation of cyclohexane into cyclohexanone and cyclohexanol with oxygen or oxygen-containing gases, water extraction, esterification and hydrogenation into hexandiol and cyclisation of 6-hydroxycaproic acid esters into caprolactone. Steps involved are: (a) esterification of the monocarboxylic and dicarboxylic acids in the aqueous reaction mixture with low molecular mass alcohols, (b) excess alcohol and low b.pt. substances are distilled off, (c) a second distillation step separates the mixture into an ester fraction substantially free of 1,4-cyclohexandiols and one containing at least the greater part of the 1,4-cyclohexandiols, (d) at least part of a substantially 6-hydroxycaproic acid ester stream is separated from the ester fraction in a third distillation stage, (e) the ester fraction from (d) from which the 6-hydroxycaproic acid ester was at least partially removed, is hydrogenated catalytically and 1,6-hexandiol is extracted by distillation and (f) the substantially 6-hydroxycaproic acid ester containing stream is heated above 200 deg C at reduced pressure so as to effect cyclisation. Pure iota -caprolactone is recovered by distillation. Preferably water is removed from the carboxylic acid mixture before esterification. Alcohol for esterification is either 1-3C (preferably MeOH) or 4-10C (preferably iso-BuOH or tert.-BuOH) and a variety of distillation, collection and separation arrangements are used depending on the relative b.pts. of the intermediate products involved. A Cu, Co and/or Re based catalyst is used for the hydrogenation step, or one of type CuaAlbZrcMndOx (a > 0, b > 0, c \- 0, d > 0, a > b/2, b > a/4, a > c, a > d and x = a number to balance the formula).

    3.
    发明专利
    未知

    公开(公告)号：DE19756171A1

    公开(公告)日：1999-07-01

    申请号：DE19756171

    申请日：1997-12-17

    Applicant: BASF AG

    Inventor： DOSTALEK ROMAN DR ,  FISCHER ROLF DR ,  KRUG THOMAS ,  PAUL AXEL DR ,  PINKOS ROLF DR ,  STEIN FRANK DR

    IPC: C07B61/00 ,  C07C29/149 ,  C07C29/17 ,  C07C31/13 ,  C07C31/20 ,  C07C31/27

    Abstract: The invention relates to a method for catalytically hydrogenating carboxylic acids or the anhydrides or esters thereof into alcohol on heterogeneous catalysts containing hydrogenating elements of groups 6, 7, 8, 9, 10 and 11 and optionally groups 2, 14 and 15 of the periodic table of elements or consisting thereof, in a liquid phase at temperatures of 100-300 DEG C and at pressures of 10-300 bars, whereby 1-3,000 ppm of a basic alkali or earth-alkaline compound in relation to the liquid hydrogenating feed and selected from a group consisting of hydroxides, carbonates, carboxylates and alcoholates is added to the hydrogenating reaction mixture.

    8.
    发明专利
    未知

    公开(公告)号：DE19648244A1

    公开(公告)日：1998-05-28

    申请号：DE19648244

    申请日：1996-11-21

    Applicant: BASF AG

    Inventor： STEIN FRANK DR ,  LIANG SHELUE DR ,  FISCHER ROLF DR ,  PINKOS ROLF DR ,  BREITSCHEIDEL BORIS DR

    IPC: C07D315/00 ,  C07D309/30 ,  C07B41/12 ,  C07B43/06 ,  C07C275/64 ,  C07D313/04 ,  C07H1/00 ,  C07K1/10

    Abstract: Method for producing delta - and epsilon -lactones of formula (I), in which the radical R may be the same or different, and stand for hydrogen, optionally substituted aliphatic, cycloaliphatic, aromatic, araliphatic or heterocyclic radicals, which can also be optionally bond to an oxygen atom of C atom and n stands for the numbers 3 or 4. According to said method, dialdehyde of the formula (II) OCH- (CR2)n-CHO, wherein R and n have the meaning cited above, or the mono- and the dihydrates and/or the mono- and the dihemiacetales of said dialdehydes are made to react in heterogeneous catalyzers during the gas or liquid phase at temperatures ranging from 20 to 300 DEG C and pressures ranging from 0.1 to 100 bar and the lactones are obtained in pure form by distillation.

    9.
    发明专利
    未知

    公开(公告)号：DE19641481A1

    公开(公告)日：1998-04-16

    申请号：DE19641481

    申请日：1996-10-09

    Applicant: BASF AG

    Inventor： SIGWART CHRISTOPH DR ,  ELLER KARSTEN DR ,  BECKER RAINER DR ,  PLITZKO KLAUS-DIETER DR ,  FISCHER ROLF HARTMUTH DR ,  STEIN FRANK DR ,  MUELLER ULRICH DR ,  HESSE MICHAEL DR

    IPC: C08G65/10 ,  B01J23/24 ,  C08G18/48 ,  C08G65/20 ,  C08G65/28 ,  C08G65/32 ,  B01J23/30

    Abstract: The invention concerns a process for preparing polytetrahydrofuran, copolymers of tetrahydrofuran and 2-butin-1,4-diol, diesters of these polymers with C2-C20 monocarboxylic acids or monoesters of these polymers with C1-C10 monocarboxylic acids by polymerizing tetrahydrofuran in the presence of one of the following telogens, water, 1,-4-butane diol, 2-butin-1,4-diol, polytetrahydrofuran with a molecular weight of between 200 and 700 Dalton, or of a C1-C10 monocarboxylic acid or a carboxylic acid anhydride produced from C2-C20 monocarboxylic acids or mixtures of these telogens on a heterogeneous carrier catalyst which contains a catalytically active amount of an oxygenous molybdenum and/or tungsten compound on an oxidic carrier material, and which has been calcined at temperatures of between 500 DEG C and 1000 DEG C after application of the precursor compounds of the oxygenous molybdenum and/or tungsten compounds to the carrier material precursors. Before it is used as a polymerization catalyst, the catalyst is activated by treatment with a reducing agent.

    METHOD FOR THE DISTILLATIVE PROCESSING OF 1,6-HEXANDIOL, 1,5-PENTANDIOL AND CAPROLACTONE
    10.
    发明专利
    METHOD FOR THE DISTILLATIVE PROCESSING OF 1,6-HEXANDIOL, 1,5-PENTANDIOL AND CAPROLACTONE 未知

    公开(公告)号：MY136889A

    公开(公告)日：2008-11-28

    申请号：MYPI20015864

    申请日：2001-12-24

    Applicant: BASF AG

    Inventor： GALL MARTIN ,  KAIBEL GERD DR ,  KRUG THOMAS ,  RUST HARALD ,  STEIN FRANK DR

    IPC: C07D309/30 ,  B01D3/14 ,  C07C29/80 ,  C07C31/20 ,  C07D315/00

    Abstract: A PROCESS FOR WORKING UP BY DISTILLATION THE CRUDE PRODUCTS OBTAINED IN THE PROCESS ACCORDING TO DE-A 196 07 954 AND CONTAINING 1,6-HEXANIDIOL (HDO),1,5-PENTANIDIOL (PDO) OR CAPROLACTONE (CLO) IN ORDER IN OBTAIN THE CORESPONDING PURE PRODUCTS,THE WORKING-UP BY DISTILLATION BEONG CARIED OUT IN EACH CASE IN A DIVIDING WALL COLUMN (TK) IN WHICH A DIVIDING WALL (T) IS ARRANGED IN THE LOGITUDINAL DIRECTION OF DIRECTION OF THE COLUMN WITH FORMATION OF AN UPPER COMMON COLUMN REGION (1),A LOWER COMMON COLUMN REGION (6),A FEED SECTION (2,4) HAVING A RECTIFICATION SECTION (2) AND STRIPPING SECTION (4) AND A TAKE-OFF SECTION (3,5) HAVING A STRIPPING SECTION (3) AND RETIFICATION SECTION (5),WITH FEEDING OF THE RESPECTIVE CRUDE PRODUCT HDO,PLO OR CLO IN THE MIDDLE REGION OF THE FEED SECTION (2,4) AND REMOVAL OF THE HIGH BOILER FRACTION (C) FROM THE BOTTOM OF THE COLUMN,OF THE LOW BOILER FRACTION (A) VIA THE TOP OF COLUMN AND OF THE MEDIUM BOILRE FRACTION (B) FROM THR MIDDLE REGION OF THE TAKE-OFF SECTION (3,5),OR IN THERMALLY COUPLED COLUMNS.

Patent Agency Ranking