| US20030058107A1
              (en)
            
            * | 2001-09-25 | 2003-03-27 | Ferrier Joseph A. | Personal item locator system | 
        
          | AU2003224812A1
              (en)
            
            * | 2002-04-01 | 2003-10-20 | E.I. Du Pont De Nemours And Company | Preparation of levulinic acid esters and formic acid esters from biomass and olefins | 
        
          | RU2006125433A
              (ru)
            
            * | 2003-12-15 | 2008-01-27 | Шелл Интернэшнл Рисерч Маатсхаппий Б.В. (NL) | Способ разжижения лигноцеллюлозного материала | 
        
          | US7378549B2
              (en) | 2004-01-26 | 2008-05-27 | Shell Oil Company | Process for the reactive extractive extraction of levulinic acid | 
        
          | US7317116B2
              (en) | 2004-12-10 | 2008-01-08 | Archer-Daniels-Midland-Company | Processes for the preparation and purification of hydroxymethylfuraldehyde and derivatives | 
        
          | US7393963B2
              (en)
            
            * | 2004-12-10 | 2008-07-01 | Archer-Daniels-Midland Company | Conversion of 2,5-(hydroxymethyl)furaldehyde to industrial derivatives, purification of the derivatives, and industrial uses therefor | 
        
          | EP1828095B1
              (en)
            
            * | 2004-12-23 | 2011-10-05 | Shell Internationale Research Maatschappij B.V. | A process for the hydrogenation of a lactone or of a carboxylic acid or an ester having a gamma-carbonyl group | 
        
          | US7501062B2
              (en) | 2005-02-22 | 2009-03-10 | Shell Oil Company | Process for permeation enhanced reactive extraction of levulinic acid | 
        
          | US7625941B2
              (en)
            
            * | 2005-09-22 | 2009-12-01 | E.I. Du Pont De Nemours And Company | Ionic liquids | 
        
          | US7402711B2
              (en) | 2005-09-22 | 2008-07-22 | E.I. Du Pont De Nemours And Company | Preparation of poly(tetramethylene) glycol | 
        
          | EP1940761B1
              (en)
            
            * | 2005-09-22 | 2009-05-06 | E.I. Du Pont De Nemours And Company | Preparation of polytrimethylene ether glycol and copolymers thereof | 
        
          | US20070100192A1
              (en)
            
            * | 2005-10-27 | 2007-05-03 | Harmer Mark A | Olefin isomerization | 
        
          | PL1954140T3
              (pl) | 2005-11-22 | 2013-08-30 | Segetis Inc | Ketale lewulinianu glicerolu i ich zastosowanie | 
        
          | MY156543A
              (en) | 2005-11-22 | 2016-02-26 | Segetis Inc | Adducts of levulinic derivatives with epoxidized fatty esters and uses thereof | 
        
          | US7520905B1
              (en) | 2006-02-06 | 2009-04-21 | Gene E Lightner | Additives derived from biomass extracted by biodiesel fuel oil | 
        
          | US7700788B2
              (en)
            
            * | 2006-10-31 | 2010-04-20 | Battelle Memorial Institute | Hydroxymethyl furfural oxidation methods | 
        
          | US7815741B2
              (en)
            
            * | 2006-11-03 | 2010-10-19 | Olson David A | Reactor pump for catalyzed hydrolytic splitting of cellulose | 
        
          | US7815876B2
              (en) | 2006-11-03 | 2010-10-19 | Olson David A | Reactor pump for catalyzed hydrolytic splitting of cellulose | 
        
          | WO2008137639A1
              (en)
            
            * | 2007-05-02 | 2008-11-13 | Mascoma Corporation | Two-stage method for pretreatment of lignocellulosic biomass | 
        
          | RU2339612C1
              (ru)
            
            * | 2007-07-25 | 2008-11-27 | Институт химии и химической технологии СО РАН | Способ получения левулиновой кислоты кислотно-каталитической конверсией сахарозы | 
        
          | FI121541B
              (fi) | 2008-04-21 | 2010-12-31 | Kemira Oyj | Menetelmä muurahaishapon talteenottamiseksi | 
        
          | WO2010036884A1
              (en) | 2008-09-25 | 2010-04-01 | Segetis, Inc. | Ketal ester derivatives | 
        
          | US8138354B2
              (en)
            
            * | 2008-12-04 | 2012-03-20 | E. I. Du Pont De Nemours And Company | N-substituted pyrrolidonium ionic liquids | 
        
          | US8119818B2
              (en) | 2008-12-04 | 2012-02-21 | E. I. Du Pont De Nemours And Company | Functionalized N-substituted pyrrolidonium ionic liquids | 
        
          | US8350056B2
              (en)
            
            * | 2008-12-04 | 2013-01-08 | E I Du Pont De Nemours And Company | Functionalized N-substituted pyrrolidonium ionic liquids | 
        
          | CN102307856A
              (zh) | 2008-12-04 | 2012-01-04 | 纳幕尔杜邦公司 | 带有膨胀连接子的n-取代的吡咯烷酮*离子液体 | 
        
          | WO2010065873A2
              (en) | 2008-12-04 | 2010-06-10 | E. I. Du Pont De Nemours And Company | Carbon dioxide removal and ionic liquid compounds useful therein | 
        
          | US8138371B2
              (en) | 2009-03-11 | 2012-03-20 | Biofine Technologies Llc | Production of formic acid | 
        
          | CA2759224A1
              (en)
            
            * | 2009-06-05 | 2010-12-09 | Energy & Environmental Research Center Foundation | Multiproduct biorefinery for synthesis of fuel components and chemicals from lignocellulosics via levulinate condensations | 
        
          | US20100312006A1
              (en)
            
            * | 2009-06-09 | 2010-12-09 | Meadwestvaco Corporation | Production of levulinic acid and levulinate esters from biomass | 
        
          | US8580978B2
              (en)
            
            * | 2009-08-07 | 2013-11-12 | Shell Oil Company | Process for preparing a hydroxyacid or hydroxyester | 
        
          | US20110112326A1
              (en)
            
            * | 2009-08-07 | 2011-05-12 | Jean-Paul Lange | Process for hydrogenation | 
        
          | US8362306B2
              (en)
            
            * | 2009-10-26 | 2013-01-29 | University Of Maine System Board Of Trustees | Energy densification of biomass-derived organic acids | 
        
          | US20110173877A1
              (en)
            
            * | 2009-12-24 | 2011-07-21 | Jeroen Van Buijtenen | Process for preparing a hydrocarbon or mixture of hydrocarbons | 
        
          | US7960592B1
              (en) | 2010-01-12 | 2011-06-14 | Wisconsin Alumni Research Foundation | Production of methyl-vinyl ketone from levulinic acid | 
        
          | KR20130102468A
              (ko) | 2010-05-10 | 2013-09-17 | 세게티스, 인코포레이티드. | 방향 제형,이의 제조 방법 및 이를 포함하는 물품 | 
        
          | CN102939323B
              (zh) | 2010-05-12 | 2016-03-30 | 国际壳牌研究有限公司 | 液化纤维素材料的方法 | 
        
          | US20110302824A1
              (en) | 2010-05-12 | 2011-12-15 | Shell Oil Company | Process for liquefying a cellulosic material | 
        
          | CN102030646B
              (zh)
            
            * | 2010-11-18 | 2013-09-04 | 郑州大学 | 一种纤维素类物质水解直接转化生成乙酰丙酸乙酯的工艺 | 
        
          | AR085717A1
              (es) | 2011-04-01 | 2013-10-23 | Dsm Ip Assets Bv | Proceso para producir acido adipico y diesteres del mismo en un proceso de carbonilacion utilizando ligandos bifosfato bidentados de paladio | 
        
          | AR088124A1
              (es) | 2011-04-01 | 2014-05-14 | Dsm Ip Assets Bv | Proceso para la preparacion de esteres de acido alcanoico en un proceso de carbonilacion utilizando ligandos de bifosfato bidentados de paladio | 
        
          | US8962867B2
              (en) | 2011-05-25 | 2015-02-24 | Wisconsin Alumni Research Foundation | Solute-enhanced production of gamma-valerolactone (GVL) from aqueous solutions of levulinic acid | 
        
          | US8389749B2
              (en) | 2011-05-25 | 2013-03-05 | Wisconsin Alumni Research Foundation | Method to produce, recover and convert furan derivatives from aqueous solutions using alkylphenol extraction | 
        
          | US8399688B2
              (en) | 2011-05-25 | 2013-03-19 | Wisconsin Alumni Research Foundation | Production of levulinic acid, furfural, and gamma valerolactone from C5 and C6 carbohydrates in mono- and biphasic systems using gamma-valerolactone as a solvent | 
        
          | US8389761B2
              (en) | 2011-05-25 | 2013-03-05 | Wisconsin Alumni Research Foundation | Method to produce and recover levulinic acid and/or gamma-valerolactone from aqueous solutions using alkylphenols | 
        
          | JP2014524905A
              (ja)
            
            * | 2011-06-21 | 2014-09-25 | ディーエスエム  アイピー  アセッツ  ビー.ブイ. | レブリン酸からバレロラクトンを製造する方法 | 
        
          | PT2537841E
              (pt) | 2011-06-22 | 2013-12-19 | Dsm Ip Assets Bv | Produção continua de furfural e de ácido levulínico | 
        
          | EP2573064B1
              (en) | 2011-09-23 | 2013-11-13 | DSM IP Assets B.V. | Process to produce alkenoic acid esters from lactones | 
        
          | US20130079566A1
              (en)
            
            * | 2011-09-27 | 2013-03-28 | Nevada, | Catalytic process for conversion of biomass into hydrocarbon fuels | 
        
          | CN104066705B
              (zh)
            
            * | 2011-11-23 | 2016-12-07 | Gf生化有限公司 | 制备乙酰丙酸的方法 | 
        
          | CN102558106B
              (zh)
            
            * | 2011-12-15 | 2014-12-17 | 北京金骄生物质化工有限公司 | 一种利用废弃生物质制备2-甲基四氢呋喃的方法 | 
        
          | PL2675782T3
              (pl) | 2011-12-20 | 2015-11-30 | Dsm Ip Assets Bv | Sposób wytwarzania estrów kwasów alkenowych z laktonów | 
        
          | WO2013101999A1
              (en) | 2011-12-28 | 2013-07-04 | E. I. Du Pont De Nemours And Company | Process for the production of furfural | 
        
          | WO2013102002A1
              (en) | 2011-12-28 | 2013-07-04 | E. I. Du Pont De Nemours And Company | Processes for making furfurals | 
        
          | WO2013102007A1
              (en)
            
            * | 2011-12-28 | 2013-07-04 | E. I. Du Pont De Nemours And Company | Process for the production of furfural | 
        
          | US9181211B2
              (en) | 2011-12-28 | 2015-11-10 | E I Du Pont De Nemours And Company | Process for the production of furfural | 
        
          | AU2012364788A1
              (en)
            
            * | 2012-01-10 | 2014-07-03 | Archer Daniels Midland Company | Process for making levulinic acid | 
        
          | WO2013107904A1
              (en) | 2012-01-19 | 2013-07-25 | Dsm Ip Assets B.V. | Process to produce alkanoic acid esters in a carbonylation process using lewis acids as acid promotor | 
        
          | US9174909B2
              (en)
            
            * | 2012-02-02 | 2015-11-03 | Wisconsin Alumni Research Foundation | Two-stage, acid-catalyzed conversion of carbohydrates into levulinic acid | 
        
          | CA2864911A1
              (en) | 2012-02-16 | 2013-08-22 | Karl A. Seck | Biorefinery for conversion of carbohydrates and lignocellulosics via primary hydrolysate cmf to liquid fuels | 
        
          | AU2013232364B2
              (en) | 2012-03-12 | 2017-10-12 | Georgia-Pacific LLC | Method for producing levulinic acid from lignocellulosic biomass | 
        
          | EP2830612B1
              (en)
            
            * | 2012-03-30 | 2016-05-04 | Nestec S.A. | 4-oxo-2-pentenoic acid and the health of the digestive tract | 
        
          | EP2872495B1
              (en)
            
            * | 2012-07-13 | 2016-08-24 | DSM IP Assets B.V. | Process for the production of furfural and levulinic acid from lignocellulosic biomass | 
        
          | WO2014037560A1
              (en) | 2012-09-10 | 2014-03-13 | Dsm Ip Assets B.V. | Process for the separation of levulinic acid from biomass | 
        
          | US9073841B2
              (en)
            
            * | 2012-11-05 | 2015-07-07 | Segetis, Inc. | Process to prepare levulinic acid | 
        
          | BR112015012471B1
              (pt) | 2012-11-29 | 2020-05-19 | Segetis Inc | cetais de carbóxi éster , métodos de fabricação e uso dos mesmos. | 
        
          | BR112015012956A2
              (pt)
            
            * | 2012-12-07 | 2017-07-11 | Dsm Ip Assets Bv | processo para a produção de um hidrolisado de biomassa | 
        
          | CA2910053A1
              (en) | 2013-05-16 | 2014-10-20 | Dsm Ip Assets B.V. | Process for the separation of formic acid from methyltetrahydrofuran | 
        
          | AU2014268648A1
              (en)
            
            * | 2013-05-22 | 2015-11-26 | Gfbiochemicals Limited | Process to prepare levulinic acid | 
        
          | US9346731B2
              (en) | 2013-09-18 | 2016-05-24 | Georgia-Pacific LLC | Method for producing levulinic acid from sludge and lignocellulosic biomass | 
        
          | US9403734B2
              (en) | 2013-09-18 | 2016-08-02 | Georgia-Pacific LLC | Method for producing organic acids and organic acid degradation compounds from biomass | 
        
          | WO2015063033A1
              (en) | 2013-11-01 | 2015-05-07 | Dsm Ip Assets B.V. | Process for the separation of levulinic acid | 
        
          | PL3132005T3
              (pl) | 2014-03-26 | 2022-03-28 | Neste Oyj | Sposób konwersji termicznej ketokwasów i hydrorafinacji do węglowodorów | 
        
          | ES2762517T3
              (es) | 2014-03-26 | 2020-05-25 | Neste Oyj | Método para la conversión catalítica de cetoácidos e hidrotratamiento en hidrocarburos | 
        
          | CN104292195B
              (zh)
            
            * | 2014-09-05 | 2016-10-12 | 中国科学院广州能源研究所 | 一种生物质分级处理后制备糠醛和调变流量制备乙酰丙酸的方法 | 
        
          | CN104292193B
              (zh)
            
            * | 2014-09-05 | 2017-01-11 | 中国科学院广州能源研究所 | 一种生物质分级处理后制备糠醛和两步制备乙酰丙酸的方法 | 
        
          | CN104292194B
              (zh)
            
            * | 2014-09-05 | 2016-10-12 | 中国科学院广州能源研究所 | 一种生物质分级处理后制备糠醛和快速变温法制备乙酰丙酸的方法 | 
        
          | CN104311411B
              (zh)
            
            * | 2014-09-15 | 2015-12-02 | 淮阴师范学院 | 多级酸水解制备乙酰丙酸的方法 | 
        
          | ES2767081T3
              (es) | 2015-01-30 | 2020-06-16 | Neste Oyj | Método para la conversión catalítica de cetoácidos mediante un intermedio de cetoácido dimérico e hidrotratamiento de hidrocarburos | 
        
          | ES2767083T3
              (es) | 2015-01-30 | 2020-06-16 | Neste Oyj | Método para la conversión catalítica de cetoácidos e hidrotratamiento para obtener hidrocarburos | 
        
          | EP3257838A4
              (en) | 2015-02-13 | 2018-10-10 | UBE Industries, Ltd. | Method for producing levulinic acid ester | 
        
          | CN107406399A
              (zh) | 2015-02-18 | 2017-11-28 | 帝斯曼知识产权资产管理有限公司 | 使用在水中用氢气预处理过的钌(RU)催化剂使乙酰丙酸(LA)氢化成γ‑戊内酯(GVL) | 
        
          | CN104945446B
              (zh)
            
            * | 2015-05-20 | 2017-11-14 | 中国科学院广州能源研究所 | 一种利用秸秆类生物质制备甲酸酯、乙酸酯、乙酰丙酸酯的方法 | 
        
          | EP3115352A1
              (en) | 2015-07-10 | 2017-01-11 | GFBiochemicals Ltd. | Process for the isolation of levulinic acid | 
        
          | EP3115353A1
              (en) | 2015-07-10 | 2017-01-11 | GFBiochemicals Ltd. | Process for the isolation of levulinic acid | 
        
          | EP3115351A1
              (en) | 2015-07-10 | 2017-01-11 | GFBiochemicals Ltd. | Levulinic acid compositions | 
        
          | EP3156389A1
              (en) | 2015-10-12 | 2017-04-19 | GFBiochemicals Ltd | Process for the purification of levulinic acid | 
        
          | FI127191B
              (en) | 2015-12-23 | 2018-01-15 | Neste Oyj | Combined production of levulinic acid and furfural from biomass | 
        
          | FI127020B
              (en) | 2015-12-23 | 2017-09-29 | Neste Oyj | Selective method for the conversion of levulinic acid to gamma valerolactone | 
        
          | EP3187482A1
              (en) | 2015-12-29 | 2017-07-05 | Neste Oyj | Renewable hydrocarbons, method for producing the same and use thereof | 
        
          | ES2866043T3
              (es) | 2015-12-29 | 2021-10-19 | Neste Oyj | Método para producir una composición de destilado medio renovable, uso de la composición y combustible que la contiene | 
        
          | EP3187570B1
              (en) | 2015-12-29 | 2019-11-20 | Neste Oyj | Method for producing a fuel blend | 
        
          | CN105642204B
              (zh)
            
            * | 2016-02-26 | 2016-10-26 | 河南省科学院能源研究所有限公司 | 一种生物质水解装置 | 
        
          | CN106748711B
              (zh)
            
            * | 2016-12-08 | 2019-07-09 | 农业部环境保护科研监测所 | 一种乙酰丙酸的制备方法 | 
        
          | CN114315554B
              (zh)
            
            * | 2021-12-23 | 2024-05-28 | 山东理工大学 | 水合物熔盐中甲酸和乙酰丙酸的分离方法 | 
        
          | EP4265592A1
              (en) | 2022-04-22 | 2023-10-25 | Indian Oil Corporation Limited | Method for producing levulinic acid | 
        
          | WO2025093348A1
              (en) | 2023-10-30 | 2025-05-08 | Basf Se | Water-emulsifiable isocyanates with improved properties | 
        
          | US12227486B1
              (en) | 2024-07-29 | 2025-02-18 | Biofine Technology, Llc | Systems and methods for the production of levulinic acid, furfural, and formic acid |