Patents Assigned to PQ Corporation
  • Patent number: 11786864
    Abstract: There is disclosed an organic-free, metal-containing zeolite Beta with a silica-to-alumina ratio (SAR) ranging from 5 and 20, and a metal content of at least 0.5 wt. %. There is also disclosed a method of making such a zeolite Beta without organic structure directing agent (SDA). The metal, which may comprise Fe or Cu, can be found in amounts ranging from 1-10 wt. %. A method of selective catalytic reduction of nitrogen oxides in exhaust gases using the disclosed zeolite is also disclosed.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: October 17, 2023
    Assignee: PQ Corporation
    Inventors: Hong-Xin Li, William E Cormier, Bjorn Moden
  • Patent number: 11732065
    Abstract: A composition, such as a catalyst precursor or a catalyst comprising a Cr coated silica support with particularly defined levels of Na and Al, such that the resulting Cr/Silica catalyst has an increased MI potential is disclosed. In an embodiment, the disclosed catalyst composition comprises a silica-containing substrate made using a base-set gel and comprising a catalytically active metal consisting of Cr, with Al impurities of less than 50 ppm and Na in an amount of less than 800 ppm of the catalyst composition. The disclosed composition has an increased MI potential over a catalyst having higher Al content, a lower Na:Al ratio, or both. Methods of making the disclosed composition, and methods of using it to prepare a polyethylene are also disclosed.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: August 22, 2023
    Assignee: PQ Corporation
    Inventors: Yatao Rachel Hu, Parag Rasiklal Shah, David George Collopy, Robert Joseph Parker, Myoung Kie Lee
  • Patent number: 11103857
    Abstract: A method of producing hydrothermally stable chabazite (CHA) zeolites is disclosed. The disclosed method is based on the use of reaction mixtures that (1) are essentially void of alkali metal cations and (2) contain the N,N,N-trimethyl-1-adamantyl ammonium (TMAda+) organic as the sole OSDA. The disclosed method results in a higher crystalline CHA zeolite that exhibits hydrothermal stability. There is also disclosed a zeolite material having a CHA-type framework structure made by the disclosed method. A method of selective catalytic reduction of NOx in exhaust gas using the material described herein is also disclosed.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: August 31, 2021
    Assignee: PQ Corporation
    Inventors: Joshua Pacheco, Bjorn Moden
  • Patent number: 11040337
    Abstract: A microporous crystalline material having a molar silica to alumina ratio (SAR) ranging from 10 to 15 and a fraction of Al in the zeolite framework of 0.63 or greater is disclosed. A method of selective catalytic reduction of nitrogen oxides in exhaust gas that comprises contacting exhaust gases, typically in the presence of ammonia, urea, an ammonia generating compound, or a hydrocarbon compound, with an article comprising the disclosed microporous crystalline is also disclosed. Further, a method of making the disclosed microporous crystalline material is disclosed.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: June 22, 2021
    Assignee: PQ Corporation
    Inventors: Hong-Xin Li, Anton Petushkov, Lifeng Wang, Bjorn Moden
  • Patent number: 11027983
    Abstract: An as-synthesized microporous material having a CHA structure and containing at least one organic structure directing agent that has the following general structure of the quaternary ammonium cation is disclosed: A microporous crystalline material made from the as-synthesized material is also disclosed. A method of making microporous crystalline material using one or more organic structure directing agents is also disclosed. A method of selective catalytic reduction of nitrogen oxides in exhaust gas that comprises contacting exhaust gases, typically in the presence of ammonia, urea, an ammonia generating compound, or a hydrocarbon compound, with an article comprising the disclosed microporous crystalline is also disclosed.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: June 8, 2021
    Assignee: PQ Corporation
    Inventors: Hong-Xin Li, Bjorn Moden, Anton Petushkov
  • Patent number: 10384162
    Abstract: There is disclosed a microporous crystalline material comprising a metal containing chabazite having a crystal size greater than 0.5 microns and a silica-to-alumina ratio (SAR) greater than 15, wherein the metal containing chabazite retains at least 80% of its initial surface area and micropore volume after exposure to temperatures of up to 900° C. in the presence of up to 10 volume percent water vapor for up to 1 hour. Methods of using the disclosed crystalline material, such as in the SCR of NOx in exhaust gas are also disclosed, as are methods of making such materials.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: August 20, 2019
    Assignee: PQ Corporation
    Inventors: Hong-Xin Li, William E. Cormier, Bjorn Moden
  • Patent number: 10377638
    Abstract: There is disclosed a microporous crystalline material comprising a crystal structure having building units of double-6-rings (d6r) and pore opening of 8-rings, wherein the material comprises a first metal chosen from alkali-earth group, rare-earth group, alkali group or mixtures thereof, and a second metal chosen from copper, iron or mixtures thereof, wherein the material has molar silica to alumina ratio (SAR) from 3 to 12, and is further steamed to enhance stability. Methods of making the crystalline material are also disclosed. There is also disclosed a method of selective catalytic reduction of nitrogen oxides in exhaust gas, comprising at least partially contacting the exhaust gases with an article comprising the disclosed microporous crystalline material.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: August 13, 2019
    Assignee: PQ Corporation
    Inventors: Hong-Xin Li, Bjorn Moden, David Cooper, William E. Cormier
  • Patent number: 10100602
    Abstract: Compositions and methods are disclosed for sealing subterranean spaces such as natural or induced fractures, vugs or annular spaces. The composition is composed of a base fluid consisting of a soluble alkali silicate, a gas generating additive, water, solids, and a setting agent. The gas generating additive may be coated or uncoated. The gas generating additive may also be in the form of a slurry. In the case of coated additives, the coating may act as a retarder or an accelerator to the expansion and setting agent of the soluble alkali silica. Similarly, the choice of carrier fluid in a slurry may retard or accelerate the expansion and setting of the alkali silicate-based plug.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: October 16, 2018
    Assignees: BYK USA Inc., PQ Corporation
    Inventors: Michael James McDonald, Xianglian Li, Brett Howard Cramer, Kelly Paul Short
  • Patent number: 9981256
    Abstract: There is disclosed a microporous crystalline material having pore opening ranging from 3 to 5 Angstroms, where the material comprises a first metal chosen from alkali earth group, rare earth group, alkali group, or mixtures thereof, and a second metal chosen from iron, copper or mixtures thereof; and has a molar silica to alumina ratio (SAR) from 3 to 10. The microporous crystalline material disclosed herein may comprise a crystal structure having building units of double-6-rings (d6r) and pore opening of 8-rings as exemplified with framework types defined by the Structure Commission of the International Zeolite Association having structural codes of CHA, LEV, AEI, AFT, AFX, EAB, ERI, KFI, SAT, TSC, and SAV. There is also disclosed a method of selective catalytic reduction of nitrogen oxides in exhaust gas, comprising at least partially contacting the exhaust gases with an article comprising the disclosed microporous crystalline material.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: May 29, 2018
    Assignee: PQ Corporation
    Inventors: Hong-Xin Li, Bjorn Moden, William E. Cormier
  • Patent number: 9827560
    Abstract: There is disclosed a highly crystalline, small crystal, ferrierite zeolite prepared from a gel containing a source of silica, alumina, alkali metal and a combination of two templating agents. The resulting material includes ferrierite crystals having a particle size of about or less than about 200 nm. The desired crystal size can be achieved by using a specific composition of the gel. The purity of the material and the crystal size was determined by using X-ray powder diffraction and scanning electron microscopy. The material has excellent surface area and micropore volume as determined by nitrogen adsorption.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: November 28, 2017
    Assignee: PQ Corporation
    Inventors: Anton Petushkov, Hong-Xin Li, William E. Cormier
  • Patent number: 9517458
    Abstract: There is disclosed a microporous crystalline material having pore opening ranging from 3 to 5 Angstroms, where the material comprises a first metal chosen from alkali earth group, rare earth group, alkali group, or mixtures thereof, and a second metal chosen from iron, copper or mixtures thereof; and has a molar silica to alumina ratio (SAR) from 3 to 10. The microporous crystalline material disclosed herein may comprise a crystal structure having building units of double-6-rings (d6r) and pore opening of 8-rings as exemplified with framework types defined by the Structure Commission of the International Zeolite Association having structural codes of CHA, LEV, AEI, AFT, AFX, EAB, ERI, KFI, SAT, TSC, and SAV. There is also disclosed a method of selective catalytic reduction of nitrogen oxides in exhaust gas, comprising at least partially contacting the exhaust gases with an article comprising the disclosed microporous crystalline material.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: December 13, 2016
    Assignee: PQ Corporation
    Inventors: Hong-Xin Li, Bjorn Moden, William E. Cormier
  • Publication number: 20140187411
    Abstract: A process for preparing a silica-alumina composition containing of from 30 to 70% wt silica and of from 70 to 30% wt of alumina, which process comprises (a) preparing an aqueous mixture containing aluminum sulfate and having a pH in the range of from 1.0 to 6.5; (b) adding alkali metal aluminate to the mixture obtained in step (a) to increase the pH of the mixture to within the range of from 7.1 to 12; (c) adding aluminum sulfate to the mixture obtained in step (b) to lower the pH of the mixture to within the range of from 1.5 to 6.5; (d) adding alkali metal silicate to the mixture obtained in step (c) to increase the pH of the mixture to within the range of from 6.5 to 11, (e) adding aluminum sulfate to the mixture obtained in step (d) to lower the pH of the mixture to within the range of from 1.5 to 6.
    Type: Application
    Filed: December 18, 2013
    Publication date: July 3, 2014
    Applicant: PQ Corporation
    Inventors: David Allen Cooper, Lay Hwa Ong, Ferry Winter, Laszlo Domokos, Wiebe Sjoerd Kijlstra, Sjoerd Alkema
  • Publication number: 20140128248
    Abstract: There is disclosed a highly crystalline, small crystal, ferrierite zeolite prepared from a gel containing a source of silica, alumina, alkali metal and a combination of two templating agents. The resulting material includes ferrierite crystals having a particle size of about or less than about 200 nm. The desired crystal size can be achieved by using a specific composition of the gel. The purity of the material and the crystal size was determined by using X-ray powder diffraction and scanning electron microscopy. The material has excellent surface area and micropore volume as determined by nitrogen adsorption.
    Type: Application
    Filed: November 5, 2013
    Publication date: May 8, 2014
    Applicant: PQ Corporation
    Inventors: Anton PETUSHKOV, Hong-Xin Li, William E. Cormier
  • Patent number: 8541331
    Abstract: There is disclosed iron-containing aluminosilicate zeolites having both framework iron and iron cations on the ion-exchange sites. There is also disclosed a direct synthesis method of making an iron-containing aluminosilicate zeolite, which does not require the use of an intermediate step, such as ion-exchange or impregnation. In addition, there is disclosed a method of using the iron-containing aluminosilicate zeolite disclosed herein in a selective catalytic reduction reaction, typically in the presence of ammonia, to reduce or remove nitric oxides from exhaust emissions.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: September 24, 2013
    Assignee: PQ Corporation
    Inventors: Hong-Xin Li, William E. Cormier, Bjorn Moden
  • Patent number: 8518369
    Abstract: Embodiments of the invention relate to methods for making and compositions including zeolite with an impregnated titanium dioxide. Such zeolite/titanium dioxide compositions may be useful, for example, as a substitute or extender for titanium dioxide used in coatings.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: August 27, 2013
    Assignee: PQ Corporation
    Inventors: Flavio Ernesto Ribeiro, Gary A. Baird, Ronaldo dos Santos Flor
  • Patent number: 8512659
    Abstract: There is disclosed iron-containing aluminosilicate zeolites having both framework iron and iron cations on the ion-exchange sites. There is also disclosed a direct synthesis method of making an iron-containing aluminosilicate zeolite, which does not require the use of an intermediate step, such as ion-exchange or impregnation. In addition, there is disclosed a method of using the iron-containing aluminosilicate zeolite disclosed herein in a selective catalytic reduction reaction, typically in the presence of ammonia, to reduce or remove nitric oxides from exhaust emissions.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: August 20, 2013
    Assignee: PQ Corporation
    Inventors: Hong-Xin Li, William E. Cormier, Bjorn Moden
  • Patent number: 8298331
    Abstract: Embodiments provide slurries of water and zeolite. These slurries have beneficial properties when mixed with asphalt. These beneficial properties may include extension of the asphalt as well as a decrease in the temperature used to process the cement. In some embodiments additional additives are included, such as anti-strip amines. Methods of making and using the slurries, as well as cement mixtures incorporating the slurries are also included herein.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: October 30, 2012
    Assignee: PQ Corporation
    Inventor: Flavio Ernesto Ribeiro
  • Patent number: 8192539
    Abstract: Embodiments of the invention provide method for preparing mixtures of natural or artificial zeolite with at least one of recycled asphalt shingles and recycled asphalt pavement. The prepared mixtures are also within the scope of the invention. Mixtures prepared as described herein may be useful, for example, for mixture with hot mix asphalt and cold patch asphalt.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: June 5, 2012
    Assignee: PQ Corporation
    Inventors: Scott Barger, Armando Sotelo, Daniel Micco, Flavio Ernesto Ribeiro
  • Patent number: 7883678
    Abstract: There is disclosed a hydrothermally stable microporous crystalline material comprising a molecular sieve or zeolite having an 8-ring pore opening structure, such as SAPO-34 or aluminosilicate zeolite, able to retain a specific percentage of its surface area and micropore volume after treatment with heat and moisture, such as at least 80% of its surface area and micropore volume after exposure to temperatures of up to 900° C. in the presence of up to 10 volume percent water vapor for a time ranging from 1 to 16 hours. Methods of using the disclosed crystalline material, such as in the SCR of NOx in exhaust gas are also disclosed, as are methods of making such materials.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: February 8, 2011
    Assignee: PQ Corporation
    Inventors: Hong-Xin Li, William E. Cormier, Bjorn Moden
  • Patent number: 7645718
    Abstract: There is disclosed a hydrothermally stable microporous crystalline material comprising a molecular sieve or zeolite having an 8-ring pore opening structure, such as SAPO-34 or aluminosilicate zeolite, able to retain a specific percentage of its surface area and micropore volume after treatment with heat and moisture, such as at least 80% of its surface area and micropore volume after exposure to temperatures of up to 900° C. in the presence of up to 10 volume percent water vapor for a time ranging from 1 to 16 hours. Methods of using the disclosed crystalline material, such as in the SCR of NOx in exhaust gas are also disclosed, as are methods of making such materials.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: January 12, 2010
    Assignee: PQ Corporation
    Inventors: Hong-Xin Li, William E. Cormier, Bjorn Moden