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公开(公告)号：US11643609B2
公开(公告)日：2023-05-09
申请号：US16321506
申请日：2017-08-04
Applicant: RELIANCE INDUSTRIES LIMITED
Inventor： Sateesh Daggupati , Clifton Gregg Keeler , Sukumar Mandal , Asit Kumar Das , Sachchit Kumar Majhi , Ajay Gupta , Ajit Vish Sapre
CPC classification number: C10J3/48 , C01B3/44 , C10J3/721 , C10K1/007 , C10K1/024 , C10K1/04 , C10K3/02 , C10K3/023 , C01B2203/042 , C01B2203/0465 , C10J2300/093 , C10J2300/0916 , C10J2300/0943
Abstract: The present disclosure relates to a process and a system for producing synthesis gas. The carbonaceous feedstock is gasified, in the presence of at least one of oxygen and steam, in a first reactor to obtain a gaseous mixture comprising H2, CO, CH4, CO2, H2O, tar and char. The gaseous mixture is treated in a second reactor, in the presence of a catalyst, to obtain synthesis gas. The system comprises a first reactor, a connecting conduit, a second reactor, at least one cyclone separator, at least one heat exchanger and at least one synthesis gas filter unit. The process and the system of the present disclosure are capable of producing synthesis gas with comparatively higher conversion of the unreacted char.
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公开(公告)号：US20150361362A1
公开(公告)日：2015-12-17
申请号：US14765575
申请日：2013-12-18
Applicant: RELIANCE INDUSTRIES LIMITED
Inventor： Sateesh Daggupati , Sukumar Mandal , Asit Kumar Das , Ajit Vishwanath Sapre
IPC: C10J3/46 , B01J23/04 , B01J27/25 , B01J27/232
CPC classification number: C10J3/466 , B01J23/04 , B01J27/232 , B01J27/25 , B01J29/084 , B01J29/40 , B01J37/0201 , C10J3/463 , C10J2300/0943 , C10J2300/0976 , C10J2300/0986 , C10J2300/1246 , C10J2300/1637 , C10J2300/1807 , C10J2300/1853 , Y02P20/52 , Y02P20/584
Abstract: An improved process for the catalytic gasification of a carbonaceous feedstock in a dual fluidized bed reactor for producing synthesis gas is disclosed. The disclosure uses γ-alumina as a catalyst support iand heat carrier in the gasification zone (102). The gasification zone (102) is operated at 700-750° C. to prevent substantial conversion of γ-alumina to α-alumina, which would manifest in the enablement of high catalyst loading and high recyclability. The catalyst is an alkali metal, preferably K2CO3, so that conversion proportional to total K2CO3 to solid carbon ratio is achieved with as high K2CO3 loading as 50 wt % on the solid support. The combustion zone (140) is operated at 800°-840° C., to prevent any conversion of the γ-alumina to α-alumina, so that catalyst recyclability of up to 98% is achieved between two successive cycles.
Abstract translation: 公开了用于生产合成气的双流化床反应器中碳质原料的催化气化的改进方法。 本公开使用γ-氧化铝作为气化区（102）中的催化剂载体和热载体。 气化区（102）在700-750℃下运行，以防止γ-氧化铝大量转化成α-氧化铝，这表明在高催化剂负载和高可回收性方面。 催化剂是碱金属，优选为K 2 CO 3，因此与固体载体上的重量比为50重量％的高的K 2 CO 3负载相比，实现了与总的K 2 CO 3成比例的转化率与固体碳的比例。 燃烧区（140）在800°-840℃下运行，以防止γ-氧化铝转化为α-氧化铝，从而在两个连续循环之间实现高达98％的催化剂可再循环。
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公开(公告)号：US11945728B2
公开(公告)日：2024-04-02
申请号：US17044727
申请日：2019-04-03
Applicant: Reliance Industries Limited
Inventor： Sateesh Daggupati , Sachchit Majhi , Sukumar Mandal , Asit Kumar Das , Vipulkumar Rameshbhai Panchotia , Mehul Bharatbhai Joshi , Gopal Ravichandran , Praveen Kumar Chinthala , Swapan Kumar Ghosh , Ajit Vishwanath Sapre
CPC classification number: C01G31/02 , C22B1/02 , C22B1/14 , C22B3/04 , C22B3/22 , C22B3/44 , C22B7/007
Abstract: A process for obtaining vanadium component in the form of vanadium oxide from gasifier slag is disclosed. The process comprises pulverizing the slag to obtain pulverized slag, which is blended with water and an alkali salt to obtain a slurry. The slurry is dried and then roasted in the presence of air to obtain a roasted slag. The roasted slag is leached to obtain a first filtrate comprising the vanadium component. The first filtrate is reacted with a magnesium salt to remove a silica component in the form of a precipitate. The silica free second filtrate is reacted with an ammonium salt to obtain ammonium metavanadate, which is further calcined to obtain the significant amount of vanadium pentoxide (V2O5).
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公开(公告)号：US20210348061A1
公开(公告)日：2021-11-11
申请号：US17272020
申请日：2019-08-28
Applicant: Reliance Industries Limited
Inventor： Sateesh Daggupati , Sayani Thakur , Sachchit Majhi , Sukumar Mandal , Asit Kumar Das , Vishwanath Sapre Ajit
Abstract: The present disclosure provides a method for catalytic conversion of waste plastic into liquid fuel. The method comprises thermally decomposing the waste plastic at a temperature in the range of 350 to 650° C. and under a pressure in the range of 0.0010 psi to 0.030 psi, to obtain a gaseous stream. The gaseous stream is further subjected to four stage sequential cooling to a temperature in the range of −5 to −15° c. to obtain a gas-liquid mixture comprising a gaseous fraction and a liquid fraction. The gas-liquid mixture is fed to the gas-liquid separator to obtain the gaseous fraction comprising C1 to C4 hydrocarbons and the liquid fraction comprising liquid fuel. The method of the present disclosure is simple, economical and energy efficient, which provides a high value liquid fuel with enhanced yield.
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公开(公告)号：US20210283585A1
公开(公告)日：2021-09-16
申请号：US16331872
申请日：2017-09-06
Applicant: Reliance Industries Limited
Inventor： Sukumar Mandal , Sateesh Daggupati , Sachchit Kumar Majhi , Asit Kumar Das
IPC: B01J27/232 , B01J35/10 , B01J37/00 , B01J37/02 , B01J37/10
Abstract: The present disclosure relates to a hydrothermally stable catalyst composition. The hydrothermally stable supported catalyst composition comprises K2CO3 impregnated on an amorphous silica-alumina support. The weight ratio of silica to alumina in the support is in the range of 0.1 to 1.5. The amount of K2CO3 is in the range of 5 wt % to 60 wt % with respect to the total catalyst composition. The catalyst composition is characterized by a pore volume in the range of 0.1 cc/g to 0.9 cc/g, a surface area in the range of 40 m2/g to 250 m2/g and an attrition index in the range of 2% to 8%. The present disclosure also relates to a process for preparing the catalyst composition. The catalyst composition provides improved hydrothermal stability, attrition resistance, high pore volume and surface area for gasifying carbonaceous feed at low temperature, as compared to a conventional catalyst composition.
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Patent Agency Ranking
公开(公告)号：US11879165B2
公开(公告)日：2024-01-23
申请号：US16968275
申请日：2019-02-09
Applicant: Reliance Industries Limited
Inventor： Sateesh Daggupati , Sachchit Majhi , Sukumar Mandal , Asit Kumar Das , Vishwanath Sapre Ajit
Abstract: The present disclosure relates to a process for recovering vanadium in the form of iron vanadate from a gasifier slag. The process comprises pulverizing the slag to obtain pulverized slag (2). The pulverized slag (2) is soaked in water (6) and an alkali salt (4) to obtain a slurry (8), followed by roasting the slurry in the presence of air to obtain roasted slag (12) which is leached (14) to obtain a first solution (18). The first solution (18) is heated at a temperature in the range of 60° C. to 80° C. while adding an iron salt (17) in an amount in the range of 10 wt % to 60 wt % at a pH in the range of 4 to 10, to obtain a second solid residue (21) which is dried to obtain iron vanadate (24).
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公开(公告)号：US20200370145A1
公开(公告)日：2020-11-26
申请号：US16968275
申请日：2019-02-09
Applicant: Reliance Industries Limited
Inventor： Sateesh Daggupati , Sachchit Majhi , Sukumar Mandal , Asit Kumar Das , Vishwanath Sapre Ajit
Abstract: The present disclosure relates to a process for recovering vanadium in the form of iron vanadate from a gasifier slag. The process comprises pulverizing the slag to obtain pulverized slag (2). The pulverized slag (2) is soaked in water (6) and an alkali salt (4) to obtain a slurry (8), followed by roasting the slurry in the presence of air to obtain roasted slag (12) which is leached (14) to obtain a first solution (18). The first solution (18) is heated at a temperature in the range of 60° C. to 80° C. while adding an iron salt (17) in an amount in the range of 10 wt % to 60 wt % at a pH in the range of 4 to 10, to obtain a second solid residue (21) which is dried to obtain iron vanadate (24).
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公开(公告)号：US10208262B2
公开(公告)日：2019-02-19
申请号：US14765575
申请日：2013-12-18
Applicant: Reliance Industries Limited
Inventor： Sateesh Daggupati , Sukumar Mandal , Asit Kumar Das , Ajit Vishwanath Sapre
Abstract: An improved process for the catalytic gasification of a carbonaceous feedstock in a dual fluidized bed reactor for producing synthesis gas is disclosed. The disclosure uses γ-alumina as a catalyst support i and heat carrier in the gasification zone (102). The gasification zone (102) is operated at 700-750° C. to prevent substantial conversion of γ-alumina to α-alumina, which would manifest in the enablement of high catalyst loading and high recyclability. The catalyst is an alkali metal, preferably K2CO3, so that conversion proportional to total K2CO3 to solid carbon ratio is achieved with as high K2CO3 loading as 50 wt % on the solid support. The combustion zone (140) is operated at 800°-840° C., to prevent any conversion of the γ-alumina to α-alumina, so that catalyst recyclability of up to 98% is achieved between two successive cycles.
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公开(公告)号：US11383227B2
公开(公告)日：2022-07-12
申请号：US16331872
申请日：2017-09-06
Applicant: Reliance Industries Limited
Inventor： Sukumar Mandal , Sateesh Daggupati , Sachchit Kumar Majhi , Asit Kumar Das
Abstract: The present disclosure relates to a hydrothermally stable catalyst composition. The hydrothermally stable supported catalyst composition comprises K2CO3 impregnated on an amorphous silica-alumina support. The weight ratio of silica to alumina in the support is in the range of 0.1 to 1.5. The amount of K2CO3 is in the range of 5 wt % to 60 wt % with respect to the total catalyst composition. The catalyst composition is characterized by a pore volume in the range of 0.1 cc/g to 0.9 cc/g, a surface area in the range of 40 m2/g to 250 m2/g and an attrition index in the range of 2% to 8%. The present disclosure also relates to a process for preparing the catalyst composition. The catalyst composition provides improved hydrothermal stability, attrition resistance, high pore volume and surface area for gasifying carbonaceous feed at low temperature, as compared to a conventional catalyst composition.
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公开(公告)号：US11319493B2
公开(公告)日：2022-05-03
申请号：US17272020
申请日：2019-08-28
Applicant: Reliance Industries Limited
Inventor： Sateesh Daggupati , Sayani Thakur , Sachchit Majhi , Sukumar Mandal , Asit Kumar Das , Vishwanath Sapre Ajit
Abstract: The present disclosure provides a method for catalytic conversion of waste plastic into liquid fuel. The method comprises thermally decomposing the waste plastic at a temperature in the range of 350 to 650° C. and under a pressure in the range of 0.0010 psi to 0.030 psi, to obtain a gaseous stream. The gaseous stream is further subjected to four stage sequential cooling to a temperature in the range of −5 to −15° C. to obtain a gas-liquid mixture comprising a gaseous fraction and a liquid fraction. The gas-liquid mixture is fed to the gas-liquid separator to obtain the gaseous fraction comprising C1 to C4 hydrocarbons and the liquid fraction comprising liquid fuel. The method of the present disclosure is simple, economical and energy efficient, which provides a high value liquid fuel with enhanced yield.
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