Catalyst systems for polycondensation reactions

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 63/82 (2006.01) B01J 21/00 (2006.01) B01J 23/00 (2006.01) C08G 85/00 (2006.01) B01J 21/10 (2006.01) B01J 23/06 (2006.01)

Patent

CA 2395051

The invention pertains to new catalyst systems for polycondensation reactions, for example for producing polyethylene terephthalate. In accordance with the invention, complex compounds with hydrotalcite-analogous structures of general formula [M(II)1-xM(III)x(OH)2]x+(An-x/n).mH2O are used, wherein M(II) represents divalent metals, preferably Mg or Zn or NI or Cu or Fe(II) or Co, and M(III) represents trivalent metals, for example Al or Fe(III), and A represents anions, preferably carbonates or borates. These catalysts can be calcinated and can be used in combination with phosphorus compounds that contain at least one hydrolyzable phosphorus-oxygen bond.

L'invention concerne de nouveaux systèmes de catalyseurs pour des réactions de polycondensation, par exemple, pour produire du polyéthylène téréphthalate. Selon l'invention, des composés complexes avec des structures analogues d'hydrotalcite présentant la formule générale [M(II)¿1-x?M(III)¿x?(OH)¿2?]?x+¿(A?n-¿¿x/n?).mH¿2?O sont utilisés. Dans cette dernière, M(II) représente des métaux divalents, de préférence Mg ou Zn ou NI ou Cu ou Fe(II) ou Co, et M(III) représente des métaux trivalents, par exemple, Al ou Fe(III), et A représente des anions, de préférence, des carbonates ou des borates. Ces catalyseurs peuvent être calcinés et peuvent être utilisés en association avec des composés de phosphore qui contiennent au moins une liaison phosphore-oxygène pouvant être hydrolysée.

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