Patents by Inventor Alastair J. H. McGregor

Alastair J. H. McGregor has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Recovery of HF and HCl from gaseous mixtures thereof
    Patent number: 4299606
    Abstract: A process is disclosed for recovering HF and HCl in substantially purified form from a gaseous mixture containing HF, HCl and halogenated organic vapors. The process comprises:A. feeding the gaseous mixture to the lower part of a rectification column to provide an upward flow of gases therein, the column having a temperature in the upper part of from about -40.degree. C. to about -85.degree. C., and having a temperature in its lower part in the range of from about -30.degree. C. to about 19.degree. C., the column also having a countercurrent flow of a liquid and a gas,B. withdrawing liquid HF from the bottom of the rectification column,C. withdrawing a gas from the top of the rectification column, and feeding the thus withdrawn gas to a condenser,D. condensing at least a portion of the withdrawn gas of step C to a liquid,E. feeding a portion of the condensed liquid of step D to the upper part of the rectification column, andF. recovering HCl gas from the condenser.
    Type: Grant
    Filed: January 3, 1978
    Date of Patent: November 10, 1981
    Assignee: Hooker Chemicals & Plastics Corp.
    Inventors: Stephen Robota, Alastair J. H. McGregor, Gregory A. R. Trollope