Abstract: There are provided methods for treating a gas having an undesirable odor. The methods comprise contacting the gas with an acidic aqueous oxidizing composition having a pH of about 2.0 to about 3.0 and comprising at least one cation of a metal; a sequestering agent; and H2O2 and submitting the gas and the composition to UV radiation when the gas and the composition are contacting each other, wherein the treatment permits to reduce by at least 60% intensity of the undesirable odor.
Type:
Grant
Filed:
May 13, 2022
Date of Patent:
April 23, 2024
Assignee:
EXP SERVICES INC.
Inventors:
Martin Beaulieu, Stéphane Chabot, Yves Charest
Abstract: There are provided methods for treating a gas having an undesirable odor. The methods comprise contacting the gas with an acidic aqueous oxidizing composition having a pH of about 2.0 to about 3.0 and comprising at least one cation of a metal; a sequestering agent; and H2O2 and submitting the gas and the composition to UV radiation when the gas and the composition are contacting each other, wherein the treatment permits to reduce by at least 60% intensity of the undesirable odor.
Type:
Application
Filed:
May 13, 2022
Publication date:
October 13, 2022
Applicant:
EXP SERVICES INC.
Inventors:
Martin BEAULIEU, Stéphane CHABOT, Yves CHAREST
Abstract: There are provided processes for removing H2S from a gas. The processes comprise contacting the gas with an aqueous composition comprising at least one calcium compound, thereby obtaining CaS and a H2S lean treated gas stream, while maintaining the pH at about 9.5 to about 13.0; and contacting the CaS with an aqueous oxidant solution, converting the CaS into at least one of CaSO3 and CaSO4, while maintaining the pH at about 9.5 to about 13.0.
Type:
Grant
Filed:
October 23, 2015
Date of Patent:
November 6, 2018
Assignee:
EXP SERVICES INC.
Inventors:
Stéphane Chabot, Yves Charest, Martin Beaulieu, Abderrahman Mahfoud
Abstract: There are provided methods for treating a fluid having an undesirable odor. The methods comprise contacting the fluid with a H2O2 basic aqueous oxidizing composition and/or with a H2O2 acidic aqueous oxidizing composition. Optionally, the fluid can be further treated by contacting it with activated carbon and/or by submitting the fluid and the composition to UV radiation when they are contacting together.
Type:
Grant
Filed:
August 26, 2015
Date of Patent:
December 20, 2016
Assignee:
EXP SERVICES INC.
Inventors:
Martin Beaulieu, Stéphane Chabot, Yves Charest
Abstract: There is provided an adhesive comprising chitosan an optionally a crosslinking agent. A method for preparing such an adhesive is also disclosed. A wood-panel made with such an adhesive is also provided. Moreover, a method for manufacturing a wood-based panel is provided. The method comprises preparing a mixture comprising wood, chitosan, optionally a crosslinking agent, and optionally an acid, forming a mat with the mixture, and pressing the mat under heat and pressure so as to obtain the wood-based panel.
Type:
Application
Filed:
May 3, 2012
Publication date:
August 30, 2012
Applicants:
EXP SERVICES INC., UNIBOARD CANADA INC.
Inventors:
Andre Verville, Yves Charest, Martin Beaulieu, Stephane Chabot, Richard Lepine
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