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公开(公告)号：US20210047661A1
公开(公告)日：2021-02-18
申请号：US17075486
申请日：2020-10-20
发明人： Ajay Kumar SHARMA , Manas Ranjan SWAIN , Ajit SINGH , Anshu Shankar MATHUR , Ravi Prakash GUPTA , Deepak TULI , Suresh Kumar PURI , Sankara Sri Venkata RAMAKUMAR
摘要： The present invention relates to a process for production of ethanol from lignocellulosic biomass via modified simultaneous saccharification and co-fermentation (SSCF), wherein the process includes transferring or recirculation of residual biomass from a first batch of SSCF to a second batch of SSCF at the time of enzymatic hydrolysis and then transferring the residual biomass in part or completely from the second batch of SSCF to a third batch of SSCF process to its hydrolysis reaction step. Overall, the average ethanol yield from three conjugative batch of SSCF is 5.06% higher compare to the single batch of SSCF without adding any additional enzyme, and hydrolysis time.
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2.发明申请公开(公告)号：US20190248962A1
公开(公告)日：2019-08-15
申请号：US16271423
申请日：2019-02-08
发明人： Alok SATLEWAL , Ruchi AGRAWAL , Ravindra KUMAR , Anshu Shanker MATHUR , Ravi Prakash GUPTA , Biswajit BASU , Deepak Kumar TULI
摘要： The present invention relates to an additive or additive composition for improved production of fermentable sugars from lignocellulosic biomass during enzymatic hydrolysis. More particularly, the present invention discloses petrochemical waste as an additive or an additive composition containing one or more ethylene glycol oligomers and one or more metal ions which are useful for improved production of fermentable sugars from lignocellulosic biomass during enzymatic hydrolysis.
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公开(公告)号：US20240343884A1
公开(公告)日：2024-10-17
申请号：US18620971
申请日：2024-03-28
发明人： Alok SATLEWAL , Ruchi AGRAWAL , Prakram Singh CHAUHAN , Ravindra KUMAR , Ravi Prakash GUPTA , Sankara Sri Venkata RAMAKUMAR
CPC分类号： C08J11/16 , C07C51/44 , C07C51/47 , C07C51/48 , C07C59/185 , C08J11/105 , C12P7/22 , C12P2201/00
摘要： The present invention relates to a novel integrated process to extract and purify levulinic acid (LA) produced from the technical lignin waste (2-G residue) generated after second generation (2-G) ethanol production from biomass. In this process, liquid-liquid extraction was carried out using fusel oil as an organic extractant to yield a LA rich organic phase and an acidic aqueous phase (raffinate). In addition, selected amines improved the LA yields by acting synergistically. Further fractional distillation was carried out to purify LA. The acidic raffinate is recycled back to the reaction in multiple times, which reduce the use of additional catalyst and make the overall process cost effective. The process is very simple and suitable to remove any colour and humins (soluble tar), which would otherwise form a problem in subsequent process step, particularly in distillation. At optimized process conditions 95% LA is recovered with 98% purity.
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公开(公告)号：US20240067544A1
公开(公告)日：2024-02-29
申请号：US18237205
申请日：2023-08-23
CPC分类号： C02F3/006 , C02F3/105 , C02F3/12 , C02F2103/365
摘要： The present invention relates to a process for refinery wastewater treatment. More particularly, the present invention relates to an automated process for treatment of refinery wastewater. The process of the present invention provides complete automation for controlling different critical parameters that enhance biological activity of activated sludge process (ASP) and helps in significant reduction in sludge recycling that increases the treatment efficiency.
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公开(公告)号：US20230407348A1
公开(公告)日：2023-12-21
申请号：US18173924
申请日：2023-02-24
发明人： Ajay Kumar SHARMA , Manas Ranjan SWAIN , Ajit SINGH , Anshu Shankar MATHUR , Ravi Prakash GUPTA
IPC分类号： C12P7/18
CPC分类号： C12P7/18
摘要： The present invention relates to a process for production of xylitol. More particularly, the present invention provides an improved process for high titer xylitol production from pure xylose. The process of the present invention results in enhanced xylitol production in shortest duration of time.
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公开(公告)号：US20220290195A1
公开(公告)日：2022-09-15
申请号：US17691912
申请日：2022-03-10
发明人： Periyasamy SIVAGURUNATHAN , Alok SATLEWAL , Tirath RAJ , Ravindra KUMAR , Ravi Prakash GUPTA , Suresh Kumar PURI , Sankara Sri Venkata RAMAKUMAR
摘要： The present invention provides an improved process for high titer lactic acid production using simultaneous saccharification and co-fermentation process using acid treated lignocellulosic biomass. The process comprises of pretreating lignocellulosic biomass comprising C5 and C6 sugars with dilute acid and superheated steam at a temperature ranging from 150-210° C.; neutralizing the pretreated lignocellulosic biomass of step (i) with NaOH pellets; and adding cellulase enzyme in the range of 1.5 to 10 FPU/g, bacteria, nutrients and buffering agent to the neutralized slurry obtained in step (ii) for hydrolysis and co-fermentation of C5 and C6 sugars at a temperature ranging from 40-45° C. for a period of 120-144 hours to obtain lactic acid. The process of the present invention requires simple nutrients and results in high titer lactic acid production within shortest duration of time.
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公开(公告)号：US20220098537A1
公开(公告)日：2022-03-31
申请号：US17448801
申请日：2021-09-24
发明人： Prakash Chandra SAHOO , Manoj KUMAR , Ravi Prakash GUPTA , Suresh Kumar PURI , Deepak SAXENA , Sankara Sri Venkata RAMAKUMAR
摘要： The present invention relates to a process for microbial synthesis process having less water consumption and yielding desired product profile. More particularly, the present invention relates to an improved process of microbial synthesis using ultra fine nutrient mist in a specially designed biofilm-bioreactor under controlled conditions. The present invention also relates to an apparatus for microbial synthesis and preparation of optimized biofilm for continuous product formation.
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公开(公告)号：US20200002778A1
公开(公告)日：2020-01-02
申请号：US16452243
申请日：2019-06-25
发明人： Ravindra KUMAR , Surbhi SEMWAL , Alok SATLEWAL , Ravi Prakash GUPTA , Suresh Kumar PURI , Sankara Sri Venkata RAMAKUMAR
摘要： An advantageous process for pre-treating lignocellulosic biomass to hydrolysable polysaccharide enriched biomass with reduced amount of inhibitors of catalysis comprising steps of: providing a feedstock comprising cellulosic biomass; chopping of cellulosic biomass to have a cellulosic biomass feed material of uniform size; feeding of uniform sized feed material to a horizontal counter current extraction unit; removing excess of water from the feed material obtained from the extraction unit; soaking the extruded feed material obtained from the extraction unit; optionally removing excess of water from the feed material obtained after acid soaking; steam pre-treating the feed material obtained after removing excess of water from the acid soaked feed material; neutralizing the slurry obtained from the steam pre-treating; and optionally saccharifying the neutralized slurry.
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公开(公告)号：US20230151323A1
公开(公告)日：2023-05-18
申请号：US17987515
申请日：2022-11-15
发明人： Anshu Shankar MATHUR , Preeti MEHTA , Rekha RANI , Ankita KANDPAL , Ravi Prakash GUPTA , Suresh Kumar PURI , Sankara Sri Venkata RAMAKUMAR
IPC分类号： C12N1/12
CPC分类号： C12N1/125 , C12R2001/89
摘要： The present invention relates to a process for producing enriched algal biomass having high lipid productivity. More particularly, the present invention provides a process for obtaining an enriched biomass with omega-3 fatty acids by using a microalgal strain Schizochytrium MTCC 5980 in a unique media composition and substrate residual band in a steady state continuous fermentation. The process of the present invention results in high biomass and lipid productivity.
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公开(公告)号：US20220288531A1
公开(公告)日：2022-09-15
申请号：US17689865
申请日：2022-03-08
发明人： Prakash Chandra SAHOO , Manoj KUMAR , Ravi Prakash GUPTA , Suresh Kumar PURI , Sankara Sri Venkata RAMAKUMAR
摘要： The present invention relates to a novel phase transfer solvent composition for enhanced CO2 and/or H2S capture from flue gas and biogas having various gaseous compositions. Further, the present invention provides a process of preparing the phase transfer solvent composition of the present invention.
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