Patents by Inventor Cong-Yan Chen

Cong-Yan Chen 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).

  • Patent number: 12767546
    Abstract: A ferrosilicate molecular sieve of MTW framework having a d50 crystal size of 0.5 microns or less is provided. The ferrosilicate molecular sieve may be synthesized by forming a reaction mixture containing a source of iron, a source of silicon, a source of an alkali metal, a structure directing agent containing 1,3-diisobutylimidazolium cations, a source of hydroxide ions, and water; and subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the ferrosilicate molecular sieve. The ferrosilicate molecular sieve may be used in organic compound conversion and absorptive processes.
    Type: Grant
    Filed: February 7, 2023
    Date of Patent: October 20, 2026
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Christopher Michael Lew, Rishabh Jain, Cong-Yan Chen
  • Publication number: 20260297433
    Abstract: Provided is a process for producing sustainable aviation fuel (SAF) from a renewable feedstock, for example fats, oils, and greases (FOG). The process comprises hydroprocessing paraffins using a Linde Type A (LTA) zeolite to selectively hydrocrack scantily branched isoparaffins. Hydroisomerization when using the present LTA catalysts greatly improves carbon efficiency because it maximizes the SAF yield and minimizes hydrogen losses to the manufacture of undesirable (lower boiling) products. By minimizing the SAF fraction that needs to be relegated to renewable diesel through selective hydrocracking of the molecules with the highest viscosity, the carbon efficiency of the reaction is greatly improved.
    Type: Application
    Filed: March 19, 2026
    Publication date: October 1, 2026
    Applicant: Chevron U.S.A. Inc.
    Inventors: Joel Edward SCHMIDT, Cong-Yan CHEN, Erjia GUAN, Horacio TREVINO, Guan-Dao LEI, Theodorus Ludovicus Michael MAESEN
  • Publication number: 20260295568
    Abstract: Provided is a large mesopore Y zeolite comprising mesopores of at least 18 nm in diameter and a micropore volume of at least 0.16 cm3/g. A process of preparing the large mesopore Y zeolite is also provided. The process allows the synthesis of a zeolite material with large mesopores while also avoiding the common trade of a substantial loss of crystallinity.
    Type: Application
    Filed: March 20, 2026
    Publication date: October 1, 2026
    Applicants: The Regents of The University of California, Chevron U.S.A. Inc.
    Inventors: Alexander KATZ, Xuemin LI, Bi-Zeng ZHAN, Cong-Yan CHEN, Jinyi HAN
  • Publication number: 20260152405
    Abstract: This disclosure relates to an aluminogermanosilicate molecular sieve, designated as SSZ-124, methods for making the same, and uses thereof.
    Type: Application
    Filed: January 22, 2026
    Publication date: June 4, 2026
    Inventors: Stacey Ian ZONES, Joel Edward SCHMIDT, Cong-Yan CHEN
  • Publication number: 20260124608
    Abstract: Provided is a novel synthetic crystalline borongermanosilicate molecular sieve material, designated boron SSZ-113. The boron SSZ-113 can be synthesized using 1,3 bis(2,3-dimethyl-1H-imidazolium) propane dications as a structure directing agent. The boron SSZ-113 may be used in organic compound conversion reactions and/or sorptive processes, and in particular, in reforming reactions.
    Type: Application
    Filed: December 10, 2025
    Publication date: May 7, 2026
    Applicant: Chevron U.S.A. Inc.
    Inventors: Stacey I. ZONES, Cong-Yan CHEN
  • Patent number: 12612311
    Abstract: A novel synthetic crystalline borongermanosilicate molecular sieve material, designated boron SSZ-117x, is provided. The boron SSZ-117x can be synthesized using N,N,N,3,5-pentamethyladamantan-1-ammonium cations as a structure directing agent. The synthesis employs a boron pathway to achieve the boron molecular sieve. The boron SSZ-117x may be used in organic compound conversion reactions, such as reforming, and/or sorptive processes.
    Type: Grant
    Filed: May 30, 2023
    Date of Patent: April 28, 2026
    Inventors: Stacey I. Zones, Cong-Yan Chen
  • Publication number: 20260103388
    Abstract: A process is provided for the synthesis of an aluminum-containing molecular sieve having a CIT-15 framework structure. The process includes treating an aluminum-containing molecular sieve having a CIT-13 framework structure under basic conditions to delaminate at least a portion of the molecular sieve to provide a phyllosilicate comprising delaminated cfi-layers, treating the phyllosilicate with a C6-C12 alkylamine, and calcining the treated phyllosilicate under conditions sufficient to convert the phyllosilicate to an aluminum-containing molecular sieve having the CIT-15 framework structure.
    Type: Application
    Filed: October 13, 2025
    Publication date: April 16, 2026
    Inventors: Stacey Ian ZONES, Cong-Yan CHEN
  • Publication number: 20260092218
    Abstract: Provided is a process for extracting organic surfactant occluded in an as-synthesized meso-Y zeolite (ASMY). The process comprises treating the ASMY with methanolic ammonium nitrate (MAN). The length of the treatment can last as long as needed, but equilibrium is generally reached at about 2 hours. The treatment is beneficial in that it does not decrease Al content and it extracts sufficient organic surfactant to be safe for calcination.
    Type: Application
    Filed: March 26, 2025
    Publication date: April 2, 2026
    Applicants: Chevron U.S.A. Inc., The Regents of the University of California
    Inventors: Alexander KATZ, Abraham MARTINEZ, Le XU, Jinyi HAN, Alexander E. KUPERMAN, Cong-Yan CHEN, Bi-Zeng ZHAN, Axel BRAIT, Ram KUMAR
  • Publication number: 20260061406
    Abstract: Provided is a new crystalline zeolite Fe SSZ-42 prepared by processes for preparing crystalline molecular sieves, particularly large pore zeolites, using an organic templating agent selected from the group consisting of N-benzyl-1,4-diazabicyclo[2.2.2]octane cations and N-benzyl-1-azabicyclo[2.2.2]octane cations.
    Type: Application
    Filed: August 29, 2025
    Publication date: March 5, 2026
    Applicant: Chevron U.S.A. Inc.
    Inventors: Stacey Ian ZONES, Cong-Yan CHEN
  • Patent number: 12552676
    Abstract: This disclosure relates to an aluminogermanosilicate molecular sieve, designated as SSZ-124, methods for making the same, and uses thereof.
    Type: Grant
    Filed: October 26, 2023
    Date of Patent: February 17, 2026
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Stacey Ian Zones, Joel Edward Schmidt, Cong-Yan Chen
  • Patent number: 12544744
    Abstract: Provided is a novel synthetic crystalline borongermanosilicate molecular sieve material, designated boron SSZ-113. The boron SSZ-113 can be synthesized using 1,3 bis(2,3-dimethyl-1H-imidazolium) propane dications as a structure directing agent. The boron SSZ-113 may be used in organic compound conversion reactions and/or sorptive processes, and in particular, in reforming reactions.
    Type: Grant
    Filed: May 30, 2023
    Date of Patent: February 10, 2026
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Stacey I. Zones, Cong-Yan Chen
  • Publication number: 20250345780
    Abstract: A novel synthetic crystalline molecular sieve material, designated boron SSZ-41 is provided. The boron SSZ-41 is a boronzincosilicate molecular sieve having the framework structure of SSZ-41. It can be synthesized using 1,1?-(1,4-butanediyl)bis[4-aza-1-azoniabicyclo[2.2.2]octane] dications as a structure directing agent. The boronzincosilicate SSZ-41 may be used in organic compound conversion reactions and/or sorptive processes.
    Type: Application
    Filed: July 24, 2025
    Publication date: November 13, 2025
    Applicant: Chevron U.S.A. Inc.
    Inventors: Stacey I. ZONES, Cong-Yan CHEN
  • Publication number: 20250263608
    Abstract: Provided is a circular process for converting polyolefins and other waste plastics back into the starting materials for polymers or value-added chemicals. Waste plastics are passed through a pyrolysis reactor to produce a pyrolyzed effluent. The pyrolyzed effluent is separated into offgas, a pyrolysis oil and pitch (or char). Optionally after further washing to remove halogens and other contaminants, the pyrolysis oil is passed to a hydrodehalogenation reactor, followed by a hydroconversion reactor comprising a catalyst comprising an LTA zeolite having an acid site concentration of 1-3 mol/l. Effluent from the hydroconversion reactor can then be sent to a steam cracker for renewed conversion into olefins.
    Type: Application
    Filed: February 21, 2025
    Publication date: August 21, 2025
    Applicant: Chevron U.S.A. Inc.
    Inventors: Theodorus Ludovicus Michael MAESEN, Cong-Yan CHEN, Joel E. SCHMIDT, Kandasamy M. SUNDARAM
  • Publication number: 20250263353
    Abstract: Provided is a stable and efficient process for preparing ethylene in improved yields when starting with a bio feedstock. The process first involves a hydrodeoxygenation reaction in which n-paraffins are made. The n-paraffins are then subjected to a hydroconversion reaction. The hydroconversion reaction is run in the presence of an LTA type zeolite, which zeolite has an acid site concentration preferably about 2.7 mol/l or greater. A boiling range of n-paraffins is then collected from the hydroprocessing reactor comprising C2-C6 n-paraffins. The collected C2-C6 n-paraffins can then be pyrolyzed in a steam cracker with good results including improved ethylene production.
    Type: Application
    Filed: February 21, 2025
    Publication date: August 21, 2025
    Applicant: Chevron U.S.A. Inc.
    Inventors: Theodorus Ludovicus Michael MAESEN, Cong-Yan CHEN, Joel E. SCHMIDT
  • Patent number: 12390800
    Abstract: A novel synthetic crystalline molecular sieve material, designated boron SSZ-41 is provided. The boron SSZ-41 is a boronzincosilicate molecular sieve having the framework structure of SSZ-41. It can be synthesized using 1,1?-(1,4-butanediyl)bis[4-aza-1-azoniabicyclo[2.2.2]octane] dications as a structure directing agent. The boronzincosilicate SSZ-41 may be used in organic compound conversion reactions and/or sorptive processes.
    Type: Grant
    Filed: August 30, 2023
    Date of Patent: August 19, 2025
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stacey I. Zones, Cong-Yan Chen
  • Patent number: 12344533
    Abstract: A novel synthetic crystalline aluminogermanosilicate molecular sieve material, designated SSZ-116, is provided. SSZ-116 can be synthesized using 3-[(3,5-di-tert-butylphenyl)methyl]-1,2-dimethyl-1H-imidazolium cations as a structure directing agent. SSZ-116 may be used in organic compound conversion reactions and/or sorptive processes.
    Type: Grant
    Filed: December 12, 2022
    Date of Patent: July 1, 2025
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Stacey Ian Zones, Jesus Pascual, Dan Xie, Cong-Yan Chen
  • Publication number: 20250065312
    Abstract: A novel synthetic crystalline molecular sieve material, designated boron ITQ-21, is provided. The boron ITQ-21 can be synthesized using an N,N-diethyl-5,8-dimethyl-2-azonium bicyclo [3.2.2] nonane cation as a structure directing agent. The boron ITQ-21 may be used in organic compound conversion reactions and/or sorptive processes.
    Type: Application
    Filed: August 21, 2024
    Publication date: February 27, 2025
    Applicant: Chevron U.S.A. Inc.
    Inventors: Stacey I. Zones, Cong-Yan Chen
  • Publication number: 20250019250
    Abstract: A method for synthesizing a zeolite having an of MFI framework structure is provided. The method includes (i) preparing a reaction mixture comprising a source of aluminum, a source of silicon, a structure directing agent comprising 2,2-dipropylpentane-1-amine, a source of fluoride ions, and water; (ii) heating the reaction mixture under crystallization conditions including a temperature of from 100° C. to 200° C. for a time sufficient to form crystals of the aluminosilicate zeolite; and (iii) recovering the crystals of the aluminosilicate zeolite from the reaction mixture.
    Type: Application
    Filed: July 5, 2024
    Publication date: January 16, 2025
    Inventors: Jesús C. PASCUAL, Stacey Ian ZONES, Cong-Yan CHEN
  • Patent number: 12097485
    Abstract: A method is disclosed for producing small crystal, high aluminum content zincoaluminosilicate crystalline materials having the SSZ-41 framework structure. The compositions made according to that method, as well as uses of the same, are also disclosed.
    Type: Grant
    Filed: December 12, 2022
    Date of Patent: September 24, 2024
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Stacey Ian Zones, Cong-Yan Chen
  • Publication number: 20240270585
    Abstract: This disclosure relates to a ferrosilicate molecular sieve of MTW framework topology, its synthesis and use. Ferrosilicate MTW may be directly prepared using 1,3-diisobutylimidazolium cations as a structure directing agent. Ferrosilicate MTW may be used in organic compounds conversion and absorptive processes.
    Type: Application
    Filed: February 7, 2023
    Publication date: August 15, 2024
    Inventors: Christopher Michael LEW, Rishabh JAIN, Cong-Yan CHEN