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    NEBENPRODUKTARME POLYPHENYLENPOLYMETHYLENPOLYISOCYANATE
    21.
    发明公开
    NEBENPRODUKTARME POLYPHENYLENPOLYMETHYLENPOLYISOCYANATE 审中-公开
    副产物聚苯乙烯聚甲基多异氰酸酯

    公开(公告)号：EP3250622A1

    公开(公告)日：2017-12-06

    申请号：EP16701338.2

    申请日：2016-01-22

    Applicant: BASF SE

    Inventor： LORENZ, Michael ,  FRANZKE, Axel ,  BAUMANN, Robert ,  BOCK, Michael ,  JANSSENS, Geert ,  SPEIER, Jon S.

    IPC: C08G18/76 ,  C07C263/04 ,  C07C271/06

    CPC classification number: C07C263/04 ,  C07C265/14 ,  C07C269/04 ,  C07C271/28 ,  C08G18/7692 ,  G01R33/46

    Abstract: The invention relates to polyphenylene polymethylene polyisocyanates having an NCO number of at least 29% and containing less than 2 wt% of carbamides, less than 8 wt% of carbodiimides or uretonimines, and less than 1000 ppm of organic chlorine compounds. According to the invention, the polyphenylene polymethylene polyisocyanates can be produced in that (i) polyphenylene polymethylene polyamines are reacted with organic carbonates in order to form the corresponding polyphenylene polymethylene polycarbamates, (ii) the polyphenylene polymethylene carbamates are thermally cleaved in order to form the polyphenylene polymethylene polyisocyanates, wherein, before the thermal cleavage, the free amino groups or carbamide groups present in the carbamate raw mixture containing the polyphenylene polymethylene polycarbamates are reacted with a derivatization reactant in order to form amide groups or urethane groups. According to the invention, the polyphenylene polymethylene polyisocyanates can also be produced in that, before the thermal cleavage, compounds having free amino groups or carbamide groups that are present in the carbamate raw mixture are separated from the carbamate raw mixture by filtration of the carbamate raw mixture containing the polyphenylene polymethylene polycarbamates by means of a solid acidic adsorbent in the presence of an acid dissolved in the carbamate raw mixture.

    VERFAHREN ZUR ABTRENNUNG VON SÄUREN AUS CHEMISCHEN REAKTIONSGEMISCHEN MIT HILFE UNPOLARER AMINE
    24.
    发明公开
    VERFAHREN ZUR ABTRENNUNG VON SÄUREN AUS CHEMISCHEN REAKTIONSGEMISCHEN MIT HILFE UNPOLARER AMINE 有权
    方法用于分离氨基酸而化学反应混合物中使用非极性叔胺

    公开(公告)号：EP1948670A1

    公开(公告)日：2008-07-30

    申请号：EP06793548.6

    申请日：2006-09-15

    Applicant: BASF SE

    Inventor： HUTTENLOCH, Oliver ,  DECK, Patrick ,  GANZ, Holger ,  MAUSS, Michael ,  KÖRNIG, Wolfgang ,  BOCK, Michael

    IPC: C07F9/22 ,  C07B63/00

    CPC classification number: C07F9/224 ,  C07B63/00

    Abstract: The invention relates to a method of separating acids from reaction mixtures comprising at least one product of value which is of low water solubility, by means of at least one apolar amine as auxiliary base, said method comprising the following steps: a) reacting the auxiliary base with the acid to form a salt; b) reacting the salt formed in step a) with a further base which takes over the acid while releasing the auxiliary base; c) extracting the mixture obtained in step b) with water or an aqueous medium, the salt of the further base dissolving in the aqueous phase, and the product of value, or the solution of the product of value in a suitable solvent, and the auxiliary base forming at least one separate, non-aqueous phase; and d) removing, by distillation, the auxiliary base and/or at least part of any solvent present from the at least one non-aqueous phase obtained in step c), in the course of which two immiscible liquid phases may be formed. The invention further relates to a process for preparing thiophosphoramides, to the thiophosphoramides obtainable by this process, and to the use of these thiophosphoramides as an addition to urea-containing mineral and/or organic-mineral fertilizers.

    VERFAHREN ZUR HERSTELLUNG VON ISOCYANATEN DURCH THERMISCHE SPALTUNG VON CARBAMATEN
    25.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON ISOCYANATEN DURCH THERMISCHE SPALTUNG VON CARBAMATEN 有权
    用于生产ISOCYANATES BY氨基甲酸酯的热裂解

    公开(公告)号：EP2526085A1

    公开(公告)日：2012-11-28

    申请号：EP11700347.5

    申请日：2011-01-18

    Applicant: BASF SE

    Inventor： BOCK, Michael ,  FRANZKE, Axel ,  BAUMANN, Robert ,  STROEFER, Eckhard

    IPC: C07C263/04 ,  B01D3/00

    CPC classification number: C07C263/04 ,  B01D3/143 ,  C07C265/14

    Abstract: The invention relates to a method for producing isocyanates by thermally splitting carbamates, also known as carbamide acid ester or urethane. The carbamate splitting increases in significance as a phosgene-free method for producing isocyanates. Various apparatuses are proposed for technically performing the carbamate splitting, in particular columns (in EP 0 795 543), fluidized bed reactors (in EP 555 628 and in DE 199 07 648), falling film evaporators or thin film evaporators (in EP 0 092 738). The carbamate splitting can be carried out in the liquid or gas phase. The formation of high molecular weight byproducts is problematic when thermally splitting carbamates, said byproducts arising from continued reaction of the splitting products with themselves or with the initial materials. Said byproducts can lead to deposits in the apparatuses, thus limiting continuous operation and leading to loss of yield. The residues comprise in particular allophanates and isocyanurates. The byproducts also arise by the reaction of half-urethanes (semicarbamates, that is, a difunctional compound comprising a urethane and an isocyanate function, intermediate to splitting bisurethanes) with themselves. In order to prevent said problems, the split products isocyanate and alcohol must be separated from the carbamate split gas as quickly as possible. It is further known that the problems of back reaction and continued reaction are reduced in the course of splitting, in that the carbamate split is performed in the presence of solvents, because the reaction speed of the back reaction of isocyanate and alcohol (urethanization) and the continued reactions is dependent on the type of solvent and the dilution by the solvent. For example, J.H. Saunders and K.C. Frisch: Polyurethanes, Chemistry and Technology, 1962, P. 146, Table 10, Data on the reactivity of isocyanates having alcohols in the presence of different solvents.

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