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process for producing 3,3',4,4'-tetramethyldiphenylmethane
procédé pour préparer 3,3',4,4'-tétraméthyldiphénylméthane
Son Güncelleme: 2014-11-25
Kullanım Sıklığı: 3
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Uyarı: Görünmez HTML biçimlendirmesi içeriyor
the process according to claim 1, wherein the tetramethyldiphenylmethane is produced by the reaction of o-xylene with formaldehyde.
procédé selon la revendication 1, dans lequel le tétraméthyldiphénylméthane est produit par la réaction du o-xylène avec du formaldéhyde.
Son Güncelleme: 2014-12-04
Kullanım Sıklığı: 2
Kalite:
the process according to claim 9, wherein the 3,3',4,4'-tetramethyldiphenylmethane is oxidized followed by dehydration treatment.
procédé selon la revendication 9, dans lequel le 3,3',4,4'-tétraméthyldiphénylméthane est oxydé, puis est ensuite soumis à un traitement de déshydratation.
Son Güncelleme: 2014-12-04
Kullanım Sıklığı: 2
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4,4'-diamino-3,3',5,5'-tetramethyldiphenylmethane, 4,4'-diamino-3,3',5,5'-tetraethyldiphenylmethane, 4,4'-diamino-3,3'-diethyl-5,5'-dimethyldiphenylmethane and mixtures thereof are the preferred diamines according to the present invention.
on utilise de préférence, pour la mise en oeuvre de la présente invention, le diamino-4,4′ tétraméthyl-3,3′5,5′ diphénylméthane, le diamino-4,4′ tétraéthyl-3,3′5,5′ diphénylméthane, le diamino-4,4′ diéthyl-3,3′ diméthyl-5,5′ diphénylméthane et leurs mélanges.
Son Güncelleme: 2014-12-03
Kullanım Sıklığı: 1
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