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US 5,686,554 AGranted
Process for the manufacture of paraformaldehyde
AssigneePatentes Y Novedades, S.L.
InventorLuis Eek-Vancells
Life of this patent
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Abstract
The process comprises providing a formaldehyde solution at a concentration of 80-89%; heating the solution to a temperature of 80.degree.-100.degree. C.; pouring the heated solution over heated zones on a metal belt conveyor travelling from the heated zones to other, chilled zones. The formaldehyde solution is preferably previously mixed with a catalyst.
Claims11
A process for the manufacture of paraformaldehyde, particularly for the continuous manufacture of paraformaldehyde having a purity ranging from 80 to 89 wt %, said process comprising the following steps:
- providing a formaldehyde solution having a concentration substantially the same as the purity of the paraformaldehyde to be obtained;
- heating said solution to a temperature ranging from 80.degree. C. to 100.degree. C.;
- pouring said heated solution over a metal conveyor belt travelling from first heated zones to second chilled zones, said pouring being carried out on one of said first heated zones.
Dependencies are inferred from the claim text.