Patents by Inventor Aiguo Liu
Aiguo Liu 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).
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Patent number: 11965620Abstract: The present invention discloses a pipeline patrol inspection robot having variable tracks and a control method therefor. The pipeline patrol inspection robot of the present invention includes a robot body, track assemblies symmetrically disposed on a left side and a right side of the robot body, and a movement driving mechanism. The robot body is connected to the track assemblies on the left side and the right side by track fixtures, and track angle adjusting mechanisms are respectively connected between the robot body and the track assemblies on the left side and the right side. By means of the present invention, a track camber angle can be adjusted. In addition, each track angle adjusting mechanism is independent, and has desirable flexibility to adapt to different pipeline environments.Type: GrantFiled: January 4, 2021Date of Patent: April 23, 2024Assignee: SOUTHEAST UNIVERSITYInventors: Aiguo Song, Tianyuan Miao, Bincheng Shao, Baoguo Xu, Guangming Song, Bo Xu, Shuang Liu, Jihai Min
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Publication number: 20220098625Abstract: Methods of recovering cannabinoids from cell cultures include methods comprising steps of separating the cell culture at a temperature above the melting point of the cannabinoid to separate a light phase comprising liquid state cannabinoid from a heavy phase; and methods comprising treating the cell culture at a temperature below the melting point of the cannabinoid to separate a light phase from a heavy phase comprising solid state cannabinoid. Other methods include contacting the culture with a water-miscible solvent to form a water-miscible phase and an aqueous phase, separating the two phases and recovering the cannabinoid. Other methods include contacting the culture with a water-immiscible solvent to form a water-immiscible phase and an aqueous phase, separating the two phases, and recovering the cannabinoid. Other methods include washing the inner surface of a fermentation vessel with alkaline solution to recover cannabinoid attached to the vessel surface.Type: ApplicationFiled: January 30, 2020Publication date: March 31, 2022Inventors: Lauri H. Suominen, Jefferson Lievense, Aiguo Liu, Jorge Jesus Martinez-Gonzalez, Myong Kon Ko, Wei Nan
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Publication number: 20160200586Abstract: The invention provides an oxygen Andrussow process for production of hydrogen cyanide from a methane-containing feedstock such as natural gas in the presence of oxygen and ammonia over a platinum catalyst, wherein the production of byproduct organonitrile impurities, such as acrylonitrile, is reduced. Limiting the content of C2 hydrocarbons in the methane feedstock in the oxygen Andrussow process, in contrast to the air Andrussow process, has been found to reduce formation of organonitriles, such as acrylonitrile. The organonitrile impurities can require additional processing for removal cause fouling of equipment, and can also contribute to hydrogen cyanide polymerization. Reduction of C2+ hydrocarbon levels to less than 2 wt %, or 1 wt %, or less than 0.1 wt %, in the methane can provide an improved yield of higher purity HCN.Type: ApplicationFiled: December 12, 2013Publication date: July 14, 2016Applicant: INVISTA TECHNOLOGIES S.A R.L.Inventors: Stewart FORSYTH, Aiguo LIU, Martin J. RENNER, Brent J. STAHLMAN
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Publication number: 20160046499Abstract: Processes and systems for the production of hydrogen cyanide via the Andrussow process are described. A reaction zone, wherein oxygen, ammonia, and methane can be allowed to react in the presence of a catalyst comprising platinum to provide hydrogen cyanide. A desulfurization zone, wherein a feed stream comprising sulfur and at least one of the oxygen, the ammonia, and the methane can be contacted with a desulfurization material to produce a sulfur-reduced feed stream that is provided to the reaction zone. In an example, the desulfurization material includes zinc oxide.Type: ApplicationFiled: December 12, 2013Publication date: February 18, 2016Applicant: INVISTA NORTH AMERICA S.A R.L.Inventors: Stewart FORSYTH, Aiguo LIU, Martin J. RENNER, Brent J. STAHLMAN
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Publication number: 20160046497Abstract: A process for the production of hydrogen cyanide comprises feeding a reaction mixture feed to a plurality of primary reactors each comprising a catalyst bed comprising platinum, wherein the reaction mixture feed comprises gaseous ammonia, methane, and oxygen gas, determining whether a percent yield of hydrogen cyanide in any of the plurality of primary reactors is at or below a threshold, identifying one or more suboptimal reactors amongst the plurality of primary reactors when the percent yield of hydrogen cyanide in any of the plurality of primary reactors is at or below the threshold, and supplementally feeding the reaction mixture feed to one or more supplementary reactors when the one or more suboptimal reactors are identified, wherein each of the one or more supplementary reactors comprises a catalyst bed comprising platinum.Type: ApplicationFiled: December 12, 2013Publication date: February 18, 2016Applicant: INVISTA NORTH AMERICA S.A R.L.Inventors: Stewart FORSYTH, Aiguo LIU, Martin J. RENNER, Brent J. STAHLMAN
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Publication number: 20150360965Abstract: The system and methods described herein solve problems of inaccurate flow control, loss of optimum reactant gas feed ratios, and the associated inefficiencies brought on by variable humidity in reactant feedstream gases during production of hydrogen cyanide by an Andrussow process.Type: ApplicationFiled: December 12, 2013Publication date: December 17, 2015Applicants: INVISTA TECHNOLOGIES S.A.R.L., INVISTA NORTH AMERICA S.A.R.L.Inventors: Stewart FORSYTH, Aiguo LIU, Martin J. RENNER, Brent J. STAHLMAN
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Publication number: 20150352481Abstract: A method and a system for recovering hydrogen from a process for making hydrogen cyanide are described herein. In the method, hydrogen is recovered from a gaseous waste stream of an Andrussow process. The method comprises the following steps: (a) adjusting a reaction mixture comprising methane, ammonia and oxygen to provide the reaction mixture with sufficient oxygen to generate a gaseous waste stream that has at least 40% hydrogen after removal of ammonia and recovery of hydrogen cyanide; and (b) removing components from the gaseous waste stream to generate recovered hydrogen.Type: ApplicationFiled: December 12, 2013Publication date: December 10, 2015Applicant: INVISTA NORTH AMERICA S.A R.L.Inventors: Stewart FORSYTH, Aiguo LIU, Martin J. RENNER, Brent J. STAHLMAN
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Patent number: 8859828Abstract: A process for converting a sugar, sugar alcohol, or glycerol to a valuable chemical is described. The process may use a support comprising zirconium oxide promoted by a polyacid or promoter material. A catalytically active metal may be impregnated on the polyacid-promoted zirconium oxide support and the catalyst may then be introduced the sugar, sugar alcohol, or glycerol a source of hydrogen under reaction conditions. At least 40 wt % of the sugar, sugar alcohol or glycerol may be converted to a polyol and/or a shorter carbon-chain alcohol that may include at least one of propylene glycol, ethylene glycol, glycerin, methanol, ethanol, propanol and butandiols. Specific processes for converting glycerin having a selectivity for propylene glycol and for converting sorbitol with a selectivity for propylene glycol, ethylene glycol, and/or glycerin are also described.Type: GrantFiled: March 3, 2010Date of Patent: October 14, 2014Assignee: Clariant CorporationInventors: Aiguo Liu, Wayne Turbeville, Christopher C. Luckett, Hui Hui (Faye) Li
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Publication number: 20110319672Abstract: A process for converting a sugar, sugar alcohol, or glycerol to a valuable chemical is described. The process may use a support comprising zirconium oxide promoted by a polyacid or promoter material. A catalytically active metal may be impregnated on the polyacid-promoted zirconium oxide support and the catalyst may then be introduced the sugar, sugar alcohol, or glycerol a source of hydrogen under reaction conditions. At least 40 wt % of the sugar, sugar alcohol or glycerol may be converted to a polyol and/or a shorter carbon-chain alcohol that may include at least one of propylene glycol, ethylene glycol, glycerin, methanol, ethanol, propanol and butandiols. Specific processes for converting glycerin having a selectivity for propylene glycol and for converting sorbitol with a selectivity for propylene glycol, ethylene glycol, and/or glycerin are also described.Type: ApplicationFiled: March 3, 2010Publication date: December 29, 2011Applicant: SUD-CHEMIE INC.Inventors: Aiguo Liu, Wayne Turbeville, Christopher C. Luckett, Hui Hui (Faye) Li
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Publication number: 20110301021Abstract: A polyacid-promoted, zirconia catalyst or catalyst support having a high crush strength, surface area and pore volume is described. The polyacid-promoted, zirconia catalyst or catalyst support may be made by combining a zirconium compound with a polyacid/promoter material that includes the group 6 metals (i.e., chromium (Cr), molybdenum (Mo), tungsten (W)), as well as phosphoric acids, sulfuric acids, and polyorganic acids. The zirconyl-promoter precursor may be extruded in the absence of any binder or extrusion aid. The polyacid-promoted, zirconia catalyst or catalyst support is hydrothermally stable in aqueous phase hydrogenation or hydrogenoloysis reactions.Type: ApplicationFiled: March 3, 2010Publication date: December 8, 2011Applicant: SUD-CHEMIE INC.Inventors: Aiguo Liu, Todd J. Cole, II, Wayne Turbeville
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Patent number: 7982059Abstract: A process for converting aqueous sorbitol to xylitol and isosorbide in the presence of an acid catalyst, and in the absence of an enzyme or of a hydrogenating catalyst, is disclosed. In the process, a sorbitol solution is reacted with an acid zeolite to produce xylitol and isosorbide.Type: GrantFiled: April 2, 2008Date of Patent: July 19, 2011Assignee: Sud-Chemie Inc.Inventors: Aiguo Liu, Christopher C. Luckett
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Publication number: 20080249323Abstract: A process for converting aqueous sorbitol to xylitol and isosorbide in the presence of an acid catalyst, and in the absence of an enzyme or of a hydrogenating catalyst, is disclosed. In the process, a sorbitol solution is reacted with an acid zeolite to produce xylitol and isosorbide.Type: ApplicationFiled: April 2, 2008Publication date: October 9, 2008Inventors: Aiguo Liu, Christopher Luckett