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    METHOD FOR SEPARATING TRIOXANE FROM A MIXTURE CONTAINING TRIOXANE, FORMALDEHYDE AND WATER
    21.
    发明专利
    METHOD FOR SEPARATING TRIOXANE FROM A MIXTURE CONTAINING TRIOXANE, FORMALDEHYDE AND WATER 未知

    公开(公告)号：CA2548640A1

    公开(公告)日：2005-07-14

    申请号：CA2548640

    申请日：2004-12-21

    Applicant: BASF AG

    Inventor： GRUETZNER THOMAS ,  STROEFER ECKHARD ,  HASSE HANS ,  BLAGOV SERGEJ ,  STAMMER ACHIM ,  OTT MICHAEL ,  SIEGERT MARKUS ,  FRIESE THORSTEN ,  LANG NEVEN

    IPC: B01D3/36 ,  B01D3/14 ,  C07D323/06

    Abstract: The invention relates to a method for separating trioxane from a mixture containing formaldehyde, trioxane and water. According to said method: the mixture (1) is distilled in a first distillation stage (7) at a pressure of between 0.1 and 2 bar to obtain a stream (8) containing formaldehyde and a stream (9) containing predominantly trioxane, in addition to water and formaldehyde; the stream (9) is mixed with a recycling stream (19) containin g predominantly trioxane, in addition to water and formaldehyde to form a stre am (10) containing predominantly trioxane, in addition to water and formaldehyd e; the stream (10) is then distilled in a second distillation stage (14) at a pressure of between 0.2 and 10 bar, optionally after the separation of low- boilers from the stream (9) or (10) in an additional distillation stage (11) . The pressure in the second distillation stage (14) is at least 0.1 bar highe r than the pressure in the first distillation stage (7). Said distillation produces a stream (15) consisting of trioxane and a stream (16) containing predominantly trioxane, in addition to water and formaldehyde. The stream (1 6) is then distilled in a third distillation stage (17) at a pressure of betwee n 0.1 and 4 bar, to obtain a stream (18) containing predominantly water, in addition to formaldehyde and the recycling stream (19) containing predominantly trioxane, in addition to water and formaldehyde. The resultant stream (18) is optionally distilled in a fourth distillation stage (20), to obtain a stream (21) containing predominantly water and a stream (22) containing predominantly formaldehyde.

    22.
    发明专利
    未知

    公开(公告)号：NO20075864L

    公开(公告)日：2008-03-05

    申请号：NO20075864

    申请日：2007-11-15

    Applicant: BASF AG

    Inventor： STROFER ECKHARD ,  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

    23.
    发明专利
    未知

    公开(公告)号：NO20080303L

    公开(公告)日：2008-02-29

    申请号：NO20080303

    申请日：2008-01-16

    Applicant: BASF AG

    Inventor： STAMMER ACHIM ,  HASSE HANS ,  STROEFER ECKHARD ,  LANG NEVEN ,  SIEGERT MARKUS ,  FRIESE THORSTEN ,  BLAGOV SERGEJ ,  GRUETZNER THOMAS

    IPC: C07D323/06

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which a stream A1 comprising water and formaldehyde and a recycle stream B2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor in which the formaldehyde is converted to trioxane to obtain a product stream A2 comprising trioxane, water and formaldehyde; stream A2 is fed to a first distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain a stream B1 enriched in trioxane, and the stream B2 consisting substantially of water and formaldehyde; stream B1 and a recycle stream D1 comprising trioxane, water and formaldehyde are fed to a second distillation column and distilled at a pressure in the range from 0.2 to 17.5 bar to obtain a product stream C2 consisting substantially of trioxane, and a stream C1 comprising trioxane, water and formaldehyde; stream C1 is fed to a third distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain the recycle stream D1 comprising trioxane, water and formaldehyde, and a stream D2 consisting substantially of water and formaldehyde.

    25.
    发明专利
    未知

    公开(公告)号：NO20080315L

    公开(公告)日：2008-02-27

    申请号：NO20080315

    申请日：2008-01-18

    Applicant: BASF AG

    Inventor： STROFER ECKHARD ,  STAMMER ACHIM ,  HASSE HANS ,  LANG NEVEN ,  SIEGERT MARKUS ,  FRIESE THORSTEN ,  BLAGOV SERGEJ ,  GRUETZNER THOMAS

    IPC: C07D323/06

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which, in a first step, a stream A 1 comprising water and formaldehyde and a recycle stream B 2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor in which the formaldehyde is converted to trioxane to obtain a product stream A 2 comprising trioxane, water and formaldehyde. Stream A 2 and a recycle stream D 1 comprising trioxane, water and formaldehyde are fed to a first distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain a stream B 1 enriched in trioxane, and the stream B 2 consisting substantially of water and formaldehyde. Stream B 1 is fed to a second distillation column and distilled at a pressure in the range from 0.2 to 17.5 bar to obtain a product stream C 2 consisting substantially of trioxane, and a stream C 1 comprising trioxane, water and formaldehyde. Stream C 1 is fed to a third distillation column and distilled at a pressure in the range from 1 to 10 bar to obtain the recycle stream D 1 comprising trioxane, water and formaldehyde, and a stream D 2 consisting substantially of water.

    27.
    发明专利
    未知

    公开(公告)号：DE102005037293A1

    公开(公告)日：2007-02-15

    申请号：DE102005037293

    申请日：2005-08-08

    Applicant: BASF AG

    Inventor： LANG NEVEN ,  STROEFER ECKHARD ,  STAMMER ACHIM ,  FRIESE THORSTEN ,  SIEGERT MARKUS ,  HASSE HANS ,  GRUETZNER THOMAS ,  BLAGOV SERGEJ

    IPC: C07D323/06

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which a stream A1 comprising water and formaldehyde and a recycle stream B2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor in which the formaldehyde is converted to trioxane to obtain a product stream A2 comprising trioxane, water and formaldehyde; stream A2 is fed to a first distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain a stream B1 enriched in trioxane, and the stream B2 consisting substantially of water and formaldehyde; stream B1 and a recycle stream D1 comprising trioxane, water and formaldehyde are fed to a second distillation column and distilled at a pressure in the range from 0.2 to 17.5 bar to obtain a product stream C2 consisting substantially of trioxane, and a stream C1 comprising trioxane, water and formaldehyde; stream C1 is fed to a third distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain the recycle stream D1 comprising trioxane, water and formaldehyde, and a stream D2 consisting substantially of water and formaldehyde.

    INTEGRATED METHOD FOR PRODUCING TRIOXANE FROM FORMALDEHYDE
    28.
    发明专利
    INTEGRATED METHOD FOR PRODUCING TRIOXANE FROM FORMALDEHYDE 未知

    公开(公告)号：CA2617479A1

    公开(公告)日：2007-02-15

    申请号：CA2617479

    申请日：2006-08-04

    Applicant: BASF AG

    Inventor： SIEGERT MARKUS ,  FRIESE THORSTEN ,  STROEFER ECKHARD ,  BLAGOV SERGEJ ,  GRUETZNER THOMAS ,  HASSE HANS ,  STAMMER ACHIM ,  LANG NEVEN

    IPC: C07D323/06

    Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde in which a stream A1 comprising water and formaldehyde and a recycle stream B2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor in which the formaldehyde is converted to trioxane to obtain a product stream A2 comprising trioxane, water and formaldehyde; stream A2 is fed to a first distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain a stream B1 enriched in trioxane, and the stream B2 consisting substantially of water and formaldehyde; stream B1 and a recycle stream D1 comprising trioxane, water and formaldehyde are fed to a second distillation column and distilled at a pressure in the range from 0.2 to 17.5 bar to obtain a product stream C2 consisting substantially of trioxane, and a stream C1 comprising trioxane, water and formaldehyde; stream C1 is fed to a third distillation column and distilled at a pressure in the range from 0.1 to 2.5 bar to obtain the recycle stream D1 comprising trioxane, water and formaldehyde, and a stream D2 consisting substantially of water and formaldehyde.

    METHOD FOR PRODUCING POLYOXYMETHYLENE DIMETHYL ETHERS FROM METHANOL AND FORMALDEHYDE
    29.
    发明专利
    METHOD FOR PRODUCING POLYOXYMETHYLENE DIMETHYL ETHERS FROM METHANOL AND FORMALDEHYDE 未知

    公开(公告)号：CA2612277A1

    公开(公告)日：2006-12-21

    申请号：CA2612277

    申请日：2006-06-12

    Applicant: BASF AG

    Inventor： STROEFER ECKHARD ,  BLAGOV SERGEJ ,  HASSE HANS

    IPC: C08G2/08 ,  C07C41/56

    Abstract: The invention relates to a method for producing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4) by reacting formaldehyde with methanol followed by a distillative processing of the reaction mixture with the following steps: a) feeding an aqueous formaldehyde solution and methanol in to a reactor and reacting; b) feeding reaction mixture a into a reactive evaporator and separating it into a low-boiling fraction b1 containing formaldehyde, water, methanol, methylene glycol, polyoxymethylene glycols, hemiformals, methylal and polyoxymethylene glycol dimethyl ether (POMDMEn> ;i) and a high-boiling fraction b2 and returning the high-boiling fraction b2 in to the reactor (step a)); c) feeding the low-boiling fraction b1 into a first distillation column and separating it into a low-boiling fraction c1 containing formaldehyde, water, methylene glycol, methanol, hemiformals, methylal, di-, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=2,3,4) and into a high-boiling fraction c2 and returning the high- boiling fraction c2 into the reactive evaporator (step b)); d) feeding the l ow- boiling fraction c1 into a second distillation column and separating it into a low-boiling fraction d1 and into a high-boiling fraction d2 consisting of formaldehyde, water, methylene glycol, polyoxymethylene glycols, tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); e) feeding the high- boiling fraction d2 into a phase separating apparatus and separating it into an aqueous phase e1 consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols and into an organic phase e2 containing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4); f) feeding the organi c phase e2 into a third distillation column and separating it into a low-boili ng fraction f1 consisting of formaldehyde, water, methylene glycol and polyoxymethylene glycols and into a high-boiling fraction f2 consisting of t ri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4).

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