Method for preventing scale formation in a continuous ester-inte

Details Method for preventing scale formation in a continuous ester-inte Method for preventing scale formation in a continuous ester-inte

1976-04-19

1977-11-08

Woodberry, Edward M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08G 6314, C08G 6316

Patent

active

040575349

ABSTRACT:
Scale formation in a continuous ester-interchange reaction for the production of polyesters, is prevented by subjecting a dialkyl ester of a difunctional carboxylic acid at least 80 mole% of which consists of terephthalic acid and at least one glycol to a continuous ester-interchange reaction catalyst in the presence of a catalytic amount of an ester-interchange reaction catalyst composed of a manganese compound and a lithium compound, the amount of said ester-interchange reaction catalyst being the one which meets the following expressions (i) and (ii)

REFERENCES:
patent: 3511812 (1970-05-01), Stewart et al.
patent: 3634358 (1972-01-01), Okuzumi
patent: 3661858 (1972-05-01), Gleim et al.
patent: 3830759 (1974-08-01), Barkey

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