Patents by Inventor Daniel V. Laciak

Daniel V. Laciak 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).

  • Polyelectrolyte membranes for the separation of acid gases
    Patent number: 5336298
    Abstract: Acid gases are separated from a gas stream by bringing the gas stream into contact with a multilayer composite membrane comprising a nonselective polymeric support layer and an active separating layer comprising a polyelectrolyte polymer which contains cationic groups which are electrostatically associated with anions for which the pK.sub.a of the conjugate acid is greater than 3.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: August 9, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Robert Quinn, Daniel V. Laciak, John B. Appleby, Guido P. Pez
  • Polymeric membrane for gas separation
    Patent number: 4859215
    Abstract: The present invention is a modified polymeric membrane having improved selectivity for separating gas mixtures. The membrane comprises a silyl substituted polyacetylene polymer to which has been added 5 to 50 wt. % of an additive which is miscible with the polymer, has a boiling point >300.degree. C. at atmospheric pressure, is soluble in a common solvent for the polymer and increases the selectivity ratio of O.sub.2 /N.sub.2 by at least 15% over the polymer without the additive.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: August 22, 1989
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Michael Langsam, Pushpinder S. Puri, Madhu Anand, Daniel V. Laciak
  • Ammonia separation using semipermeable membranes
    Patent number: 4762535
    Abstract: The present invention is a process for separating ammonia from mixtures of other gases or from aqueous streams. The ammonia-containing mixture is contacted with a membrane containing, as the active component, a salt having the structural formula: NR.sub.4.sup.+ X.sup.-, wherein each R is independently H or a straight chain or branched alkyl group and X.sup.- is an organic or inorganic anion. The membrane is useful for the selective permeation of ammonia from mixtures of gases containing ammonia, nitrogen and hydrogen.
    Type: Grant
    Filed: June 2, 1987
    Date of Patent: August 9, 1988
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Guido P. Pez, Daniel V. Laciak
  • Method for gas separation
    Patent number: 4761164
    Abstract: The present invention is a process for separating one or more components of a gas mixture. The process comprises passing the gas mixture over a membrane, which is selectively permeable to the component being separated, due to one or more reversible reactions between the component desired to be separated and a layer of active molten material immobilized in a suitable support material and/or encapsulated in a non-porous gas permeable polymer material.
    Type: Grant
    Filed: November 25, 1986
    Date of Patent: August 2, 1988
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Guido P. Pez, Richard T. Carlin, Daniel V. Laciak, James C. Sorensen
  • Ammonia separation using ion exchange polymeric membranes and sorbents
    Patent number: 4758250
    Abstract: The present invention is a process for separating ammonia from mixtures of other gases or from aqueous streams. The ammonia containing mixture is contacted with an anion exchange polymer cast into membrane form, which selectively permeates NH.sub.3 thereby providing a separation from the other components in the mixture. Alternatively, ammonia recovery may be achieved by employing the said anion exchange polymer as a selective, reversible NH.sub.3 sorbent.
    Type: Grant
    Filed: June 1, 1987
    Date of Patent: July 19, 1988
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Daniel V. Laciak, Guido P. Pez