Solid acid catalyst for production of polyester, process for...

Details Solid acid catalyst for production of polyester, process for... Solid acid catalyst for production of polyester, process for...

2008-03-24

2010-11-16

Boykin, Terressa M (Department: 1796)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C528S176000, C528S271000, C528S272000, C528S279000

Reexamination Certificate

active

07833931

ABSTRACT:
The present invention relates to a solid acid catalyst for the production of polyester which enables the production of a metal-free polyester resin containing no residual catalyst, exhibits favorable utility efficiency in the production, exhibits extremely high selectivity for the polyesterification reaction with the amount of by-products being below the limit of detection, and is able to be isolated, recovered and reused. In other words, the present invention relates to a solid acid catalyst for the production of polyester, obtained by supporting a metal oxide (B) on a support (A) formed from a metal oxide, wherein said support (A) formed from a metal oxide is a zirconia, said metal oxide (B) is a molybdenum oxide, and a Hammett acidity function (H0) for said catalyst is within a range from −3 to −9, and also relates to a process for producing the solid acid catalyst and a process for producing a polyester that uses the catalyst.

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International Search Report mailed May 20, 2008, issued on PCT/JP2008/055397.

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