34.
    发明专利
    未知

    公开(公告)号:NO20020349L

    公开(公告)日:2002-01-23

    申请号:NO20020349

    申请日:2002-01-23

    Applicant: BASF AG

    Abstract: A description is given of a process for preparing methyl formate by reacting excess methanol with carbon monoxide under superatmospheric pressure and at elevated temperature in the presence of alkali metal methoxide or alkaline earth metal methoxide as catalyst in a pressure-rated reactor, in which the use of at least two reactor elements, preferably operated in countercurrent, at about 100° C. and a pressure of about 100 bar in combination with a solids-free desalting of the reaction product makes possible very economical, largely trouble-free production of methyl formate in any desired quality and with a very good production capacity. Furthermore, the process for solids-free desalting and apparatuses for carrying out this process are described.

    OBTAINING ALDEHYDES
    39.
    发明专利

    公开(公告)号:CA1173060A

    公开(公告)日:1984-08-21

    申请号:CA399835

    申请日:1982-03-30

    Applicant: BASF AG

    Abstract: O. Z. OO5O/35O76 Aldehydes are obtained from the gaseous product of the hydroformylation of olefinically unsaturated compounds using a rhodium catalyst by a process (cf. Figure 2) in which a) this gaseous product is introduced, without being cooled or let down, into a distillation column D, b) the top fraction from this column is cooled in a condenser K so that the greater part of the aldehydes contained therein is condensed, c) the condensate is separated, in a separator A, into a gas phase and a liquid phase, d) the gas phase from A, after waste gas has been separa ted off, is again brought to the synthesis pressure by means of a compressor P, and is returned to the reactor as a recycle gas, e) the liquid phase from A is returned to D, and f) the aldehydes are taken off from column D as liquid bottom products and/or as a vaporous side stream.

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