Patents Assigned to Lhoist Recherche et Developpement S.A.
  • Composition for the Purification of Flue Gas
    Publication number: 20190015778
    Abstract: The invention relates to a composition for the purification of flue gas containing 35 to 99 wt. % of a powder of an alkali metal salt of carbonic acid and 1 to 65 wt. % of a powder of an absorptive material, wherein the powder of an absorptive material has a specific pore volume that is equal to or greater than 0.1 cm3/g. The invention also relates to a process for dry flue gas purification and the use of an absorptive material to improve the flowability and/or storability and/or HF absorptivity of an alkali metal salt of carbonic acid.
    Type: Application
    Filed: December 27, 2016
    Publication date: January 17, 2019
    Applicant: Lhoist Recherche et Développement S.A.
    Inventors: Martin Sindram, Walter Diethelm, Christopher Pust, Xavier Pettiau
  • Agglomerated product with paper fibers
    Patent number: 5591247
    Abstract: A conglomerated material based on metallurgical by-products and characterized in that it contains 2-10% of fibers, 9-25% wt of an alkaline earth metal hydroxide, and % wt of water.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: January 7, 1997
    Assignee: Lhoist Recherche et Developpement S.A.
    Inventors: Philippe Dumont, Robert Goffin
  • Vaterite and production method
    Patent number: 5290353
    Abstract: The present invention relates to a process for the preparation of substantially spherical monocrystalline vaterite, in particular, of vaterite having a determined size.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: March 1, 1994
    Assignee: Lhoist Recherche et Developpement S.A.
    Inventors: Robert Goffin, Henri-Rene Langelin
  • Method and composition for treating flue or exhaust gases utilizing modified calcium hydroxide
    Patent number: 5277837
    Abstract: A process is shown for treating flue or exhaust gases in order to remove sulfur oxides and hydrochloric acids in which calcium hydroxide having a surface area of at least 25 m.sup.
    Type: Grant
    Filed: September 17, 1992
    Date of Patent: January 11, 1994
    Assignee: Lhoist Recherche et Developpement S.A.
    Inventors: Philippe A. Dumont, Robert Goffin
  • Method and composition for treating flue or exhaust gases utilizing modified calcium hydroxide
    Patent number: 5173279
    Abstract: A process is shown for treating flue or exhaust gases in order to remove sulfur oxides and hydrochloric acids in which calcium hydroxide having a surface area of at least 25 m.sup.2 /g and a moisture content lower than 50% is injected in the gases to be treated either alone, or in a mixture with magnesium hydroxide. The calcium hydroxide used in the process is prepared by reacting quicklime or dolomitic quicklime with water in the presence of a glycol or an amine companion additive.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: December 22, 1992
    Assignee: Lhoist Recherche et Developpement S.A.
    Inventors: Philippe A. Dumont, Robert Goffin