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    METHOD FOR PRODUCING HIGHLY PURE MONOETHYLENE GLYCOL
    51.
    发明专利
    METHOD FOR PRODUCING HIGHLY PURE MONOETHYLENE GLYCOL 未知

    公开(公告)号：PL346752A1

    公开(公告)日：2002-02-25

    申请号：PL34675299

    申请日：1999-09-21

    Applicant: BASF AG

    Inventor： ADRIAN TILL ,  BESSLING BERND ,  HASSE HANS ,  VANSANT FRANS ,  THEIS GERHARD

    IPC: C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

    Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis product of ethylene oxide by pressure dewatering, vacuum dewatering and subsequent purifying distillation, which includes the pressure dewatering columns or at least the first pressure dewatering column of the battery (2, 3, 4) having a stripping section with at least one separating stage, preferably with from 2 to 10 separating stages, particularly preferably with from 3 to 6 stages, and a portion of the overhead stream of the pressure dewatering column(s) (2, 3, 4) having a stripping section being removed from the system.

    Production of anhydrous formic acid involves hydrolysis of methyl formate followed by distillation, extraction with amide and further distillations, using the amide also as a foam suppressant in first distillation stage
    54.
    发明专利
    Production of anhydrous formic acid involves hydrolysis of methyl formate followed by distillation, extraction with amide and further distillations, using the amide also as a foam suppressant in first distillation stage 未知

    公开(公告)号：DE10002793A1

    公开(公告)日：2001-07-26

    申请号：DE10002793

    申请日：2000-01-24

    Applicant: BASF AG

    Inventor： AUER HEINZ ,  BESLING BERND ,  HAMMER HANS ,  HASSE HANS ,  SAUER FRIEDRICH ,  VICARI MAXIMILIAN ,  WAGNER GERHARD ,  ADRIAN TILL

    IPC: C07C51/56 ,  C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C53/02 ,  B01D19/04 ,  C07C233/05

    Abstract: In the production of anhydrous formic acid by hydrolysis of methyl formate followed by distillation, extraction of the bottom product with an amide extractant (I) and further distillation stages, a part-stream of (I) is taken out and fed into the first distillation column at a point between the inlet for the hydrolysis mixture and the methanol take-off point. A process for the production of (essentially) anhydrous formic acid (FA) involves: (i) hydrolysis of methyl formate (MF), (ii) removal of methanol and excess MF by distillation, (iii) liquid-liquid extraction of the bottom product with an amide of formula R (R )NC(O)R (I), (iv) distillation of the extract, (v) recycling the top product from (iv) (containing water and some FA) to the lower part of the distillation column used in stage (ii), (vi) separation of the bottom product from (iv) by distillation into anhydrous FA and extractant (I) and (vii) recycling (I) into the process from stage (vi). In this process, part of the extractant (I) is taken off and fed into the distillation unit for stage (ii) at a point above the inlet for the hydrolysis mixture and below the take-off point for methanol. R , R = alkyl, cycloalkyl, aryl or aralkyl, or R plus R plus the linking nitrogen may form a 5- or 6-membered heterocycle, with the proviso that only one of these groups is aryl; R = H or 1-4C alkyl. An Independent claim is also included for the apparatus used for this process, comprising a synthesis reactor (6), a hydrolysis reactor (1), a distillation column (2) for stage (ii), a distillation column (4) for stage (iv), an extraction unit (3), a distillation column (5) for stage (vi) and a connecting line (8) for transferring a part-stream of extractant (I) to distillation column (2).

    Method for producing highly pure monoethylene glycol
    56.
    发明专利
    Method for producing highly pure monoethylene glycol 未知

    公开(公告)号：AU5980199A

    公开(公告)日：2000-04-10

    申请号：AU5980199

    申请日：1999-09-21

    Applicant: BASF AG

    Inventor： THEIS GERHARD ,  ADRIAN TILL ,  BESSLING BERND ,  HASSE HANS ,  VANSANT FRANS

    IPC: C07C29/10 ,  C07C29/80 ,  C07C31/20

    Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis, product of ethylene oxide by pressure dewatering, preferably in a battery, vacuum dewatering and subsequent purifying distillation, wherein during the vacuum dewatering an aqueous stream is withdrawn which contains-monoethylene glycol in a concentration below 1% by weight, preferably below 0.1% by weight, medium boilers and low boilers. The withdrawn aqueous stream is, optionally after further workup, removed from the system.

    METHOD FOR PRODUCING HIGHLY PURE MONOETHYLENE GLYCOL
    57.
    发明专利
    METHOD FOR PRODUCING HIGHLY PURE MONOETHYLENE GLYCOL 未知

    公开(公告)号：CA2345053A1

    公开(公告)日：2000-03-30

    申请号：CA2345053

    申请日：1999-09-21

    Applicant: BASF AG

    Inventor： VANSANT FRANS ,  THEIS GERHARD ,  BESSLING BERND ,  ADRIAN TILL ,  HASSE HANS

    IPC: C07C29/10 ,  C07C29/80 ,  C07C31/20

    Abstract: The invention relates to a method for obtaining highly pure monoethylene glycol from the product of hydrolysis of ethylene oxide by distillation, by means of dehydration under pressure, preferably in a cascade, vacuum dehydration and subsequent pure distillation. During the vacuum dehydration, an aqueous stream containing monoethylene glycol in a concentration of less than 1 wt. %, preferably less than 0.1 wt. %, medium boilers and light boile rs is drawn off and then sluiced out, optionally after reprocessing.

    58.
    发明专利
    未知

    公开(公告)号：BRPI0611610A2

    公开(公告)日：2011-02-22

    申请号：BRPI0611610

    申请日：2006-06-12

    Applicant: BASF AG

    Inventor： STROEFER ECKHARD ,  SCHELLING HEINER ,  HASSE HANS ,  BLAGOV SERGEJ

    IPC: C07C41/50 ,  C07C43/30

    Abstract: A process for preparing polyoxymethylene dialkyl ethers of the formula H2m+1CmO(CH2O)nCmH2m+1 where n=2-10, m, identically or differently,=1 or 2, in which a dialkyl ether selected from dimethyl ether, methyl ethyl ether and diethyl ether, and trioxane are fed into a reactor and reacted in the presence of an acidic catalyst, the amount of water introduced into the reaction mixture by the dialkyl ether, trioxane and/or the catalyst being

    Process for preparing polyoxymethylene dimethyl ethers from methanol and formaldehyde
    59.
    发明专利
    Process for preparing polyoxymethylene dimethyl ethers from methanol and formaldehyde 未知

    公开(公告)号：NZ563775A

    公开(公告)日：2009-12-24

    申请号：NZ56377506

    申请日：2006-06-12

    Applicant: BASF AG

    Inventor： HASSE HANS ,  BLAGOV SERGEJ ,  STROEFER ECKHARD

    IPC: C08G65/00

    Abstract: A process for preparing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4) by reacting formaldehyde with methanol and subsequently working up the reaction mixture by distillation is disclosed, wherein the process comprises the steps of: (a) feeding aqueous formaldehyde solution and methanol into a reactor and reacting to give a mixture a comprising formaldehyde, water, methylene glycol (MG), polyoxymethylene glycols (MGn>1), methanol, hemiformals (HF), methylal (POMDMEn=1) and polyoxymethylene glycol dimethyl ethers (POMDMEn>1); (b) feeding the reaction mixture a into a first distillation column and separating into a low boiler fraction b1 and a high boiler fraction b2 comprising formaldehyde, water, methanol, polyoxymethylene glycols, hemiformals and polyoxymethylene glycol dimethyl ethers (POMDMEn>1); (c) feeding the high boiler fraction b2 into a second distillation column and separating into a low boiler fraction c1 comprising formaldehyde, water, methylene glycol, polyoxymethylene glycols, methanol, hemiformals, di-, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=2,3,4) and a high boiler fraction c2 comprising polyoxymethylene glycols, high-boiling hemiformals (HFn>1) and high-boiling polyoxymethylene glycol dimethyl ethers (POMDMEn>4); (d) feeding the low boiler fraction c1 and, if appropriate, one or more recycle streams composed of formaldehyde, water, methylene glycol and polyoxymethylene glycols into a third distillation column and separating into a low boiler fraction d1 comprising formaldehyde, water, methanol, polyoxymethylene glycols, hemiformals and dioxymethylene glycol dimethyl ether (POMDMEn=2), and a high boiler fraction d2 substantially consisting of formaldehyde, water, methylene glycol, polyoxymethylene glycols, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); (e) feeding the high boiler fraction d2 into a phase separation apparatus and separating into an aqueous phase e1 substantially consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols, and an organic phase e2 comprising tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); (f) feeding the organic phase e2 into a fourth distillation column and separating into a low boiler fraction f1 substantially consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols, and a high boiler fraction f2 substantially consisting of tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4).

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