Patents Examined by Duv Truong
  • Process for the manufacture of paraformaldehyde
    Patent number: 5686554
    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.
    Type: Grant
    Filed: July 10, 1995
    Date of Patent: November 11, 1997
    Assignee: Patentes Y Novedades, S.L.
    Inventor: Luis Eek-Vancells