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1. 发明申请

WO2013011517A1 FCC CATALYST ADDITIVE AND PREPARATION METHOD THEREOF 审中-公开
标题翻译： FCC催化剂及其制备方法
公开(公告)号：WO2013011517A1
公开(公告)日：2013-01-24
申请号：PCT/IN2011/000599
申请日：2011-09-02
申请人： RELIANCE INDUSTRIES LTD. , GOPAL, Ravichandran , PRAVEEN, Kumar, Chinthala , TEJAS, Doshi , ARUN, Kumar, D. , AMIT, Gohel , SUKUMAR, Mandal , ASIT, Kumar, Das , SRIKANTA, Dinda , AMITKUMAR, Parekh
发明人： GOPAL, Ravichandran , PRAVEEN, Kumar, Chinthala , TEJAS, Doshi , ARUN, Kumar, D. , AMIT, Gohel , SUKUMAR, Mandal , ASIT, Kumar, Das , SRIKANTA, Dinda , AMITKUMAR, Parekh
IPC分类号： B01J29/82 , C10G11/02 , B01J37/00
CPC分类号： B01J29/40 , B01J29/06 , B01J29/08 , B01J29/084 , B01J29/18 , B01J29/7007 , B01J29/80 , B01J35/0006 , B01J35/002 , B01J35/1014 , B01J35/1019 , B01J37/0045 , B01J37/10 , B01J2229/186 , B01J2229/36 , B01J2229/42 , C10G11/05 , C10G11/18 , C10G2300/104 , C10G2300/1044
摘要： The present invention relates to a Fluid Catalytic Cracking (FCC) additive and its preparation process. The FCC additive has high efficiency in the production of light olefins C2, C3 and C4 hydrocarbons, especially propylene. The present invention discloses the stabilization of medium pore zeolite especially ZSM-5 using optimum phosphate salts at a pH in the range of 7-9 with synergetic combination of silica rich binder to produce FCC additive with excellent stability under severe hydrothermal conditions.
摘要翻译：本发明涉及流化催化裂化（FCC）添加剂及其制备方法。 FCC添加剂在轻质烯烃C2，C3和C4烃，特别是丙烯的生产中具有高效率。本发明公开了使用最佳磷酸盐在7-9的pH范围内稳定中孔沸石，特别是ZSM-5，与富二氧化硅粘合剂的协同组合产生FCC添加剂，并在严苛的水热条件下具有优异的稳定性。

2. 发明授权

US09067196B2 FCC catalyst additive and a method for its preparation 有权
标题翻译： FCC催化剂添加剂及其制备方法
公开(公告)号：US09067196B2
公开(公告)日：2015-06-30
申请号：US13231416
申请日：2011-09-13
申请人： Gopal Ravichandran , Praveen Kumar Chinthala , Tejas Doshi , Arun Kumar , Amit Gohel , Sukumar Mandal , Asit Kumar Das , Srikanta Dinda , Amit Kumar Parekh
发明人： Gopal Ravichandran , Praveen Kumar Chinthala , Tejas Doshi , Arun Kumar , Amit Gohel , Sukumar Mandal , Asit Kumar Das , Srikanta Dinda , Amit Kumar Parekh
IPC分类号： B01J29/06 , C07C4/06 , C10G11/05 , B01J29/40 , B01J35/00 , B01J29/18 , B01J29/70 , B01J29/80 , B01J37/00 , C10G11/18 , B01J37/10 , B01J29/08 , B01J35/10
CPC分类号： B01J29/40 , B01J29/06 , B01J29/08 , B01J29/084 , B01J29/18 , B01J29/7007 , B01J29/80 , B01J35/0006 , B01J35/002 , B01J35/1014 , B01J35/1019 , B01J37/0045 , B01J37/10 , B01J2229/186 , B01J2229/36 , B01J2229/42 , C10G11/05 , C10G11/18 , C10G2300/104 , C10G2300/1044
摘要： The present invention relates to a Fluid Catalytic Cracking (FCC) additive preparation process and composition, which has high efficiency in the production of light olefins C2, C3 and C4 hydrocarbons, specifically propylene. The present invention discloses the stabilization of medium pore zeolite specifically ZSM-5 using optimum phosphate salts at a pH in the range 7-9 with synergetic combination of silica rich binder to produce FCC additive having excellent stability under severe hydrothermal conditions.
摘要翻译：本发明涉及流动催化裂化（FCC）添加剂制备方法和组合物，其在轻质烯烃C2，C3和C4烃，特别是丙烯的生产中具有高效率。本发明公开了使用最佳磷酸盐在7-9的pH范围内稳定中孔沸石，特别是ZSM-5，同时具有富二氧化硅粘合剂的协同组合，从而生产在严苛的水热条件下具有优异稳定性的FCC添加剂。

3. 发明授权

US08618344B2 Process for recovery of propylene and LPG from FCC fuel gas using stripped main column overhead distillate as absorber oil 有权
标题翻译：使用汽提主塔顶馏出物作为吸收剂油从FCC燃料气中回收丙烯和LPG的方法
公开(公告)号：US08618344B2
公开(公告)日：2013-12-31
申请号：US13380928
申请日：2010-06-09
申请人： Manoj Yadav , Sukumar Mandal , Asit Kumar Das , Yogesh Gupta , Minaz Makhania , Gobind Tulsi , Shailendra Arora , Shubhangi Jaguste
发明人： Manoj Yadav , Sukumar Mandal , Asit Kumar Das , Yogesh Gupta , Minaz Makhania , Gobind Tulsi , Shailendra Arora , Shubhangi Jaguste
IPC分类号： C07C7/04
CPC分类号： C10G53/08 , C10G5/04 , C10G5/06 , C10G7/02 , C10G11/18 , C10G31/06 , C10G55/06 , C10G70/06 , C10G2300/301 , C10G2400/20 , C10G2400/26 , C10G2400/28
摘要： A process is disclosed for enhanced recovery of propylene and LPG from the fuel gas produced in Fluid catalytic cracking unit by contacting a heavier hydrocarbon feed with FCC catalyst. In the conventional process, the product mixture from FCC main column overhead comprising naphtha, LPG and fuel gas, are first condensed and gravity separated to produce unstabilized naphtha, which is subsequently used in the absorber to absorb propylene and LPG from fuel gas. However, the recovery of propylene beyond 97 wt % is difficult in this process since unstabilized naphtha already contains propylene of 5 mol % or above. In the present invention, C4 and lighter components from unstabilized naphtha are first stripped off in a separate column to obtain a liquid fraction almost free from propylene (
摘要翻译：公开了一种通过使较重的烃进料与FCC催化剂接触，从流化催化裂化装置产生的燃料气体中提高丙烯和LPG的回收率的方法。在常规方法中，首先将来自包含石脑油，液化石油气和燃料气体的FCC主塔架塔的产物混合物冷凝并重力分离以产生不稳定的石脑油，其随后用于吸收器以从燃料气体中吸收丙烯和LPG。然而，在该方法中丙烯的回收率超过97wt％是困难的，因为未稳定的石脑油已经含有5mol％或更高的丙烯。在本发明中，C4和来自不稳定石脑油的较轻组分首先在分开的塔中汽提，得到几乎不含丙烯（<0.1mol％）和其它LPG组分的液体组分。在吸收器中使用这种汽提的液体馏分，在冷却至20℃至30℃之后，从燃料气体中吸收较高量的丙烯和LPG，导致丙烯的回收率提高。

4. 发明申请

US20130023710A1 FCC CATALYST ADDITIVE AND A METHOD FOR ITS PREPARATION 有权
标题翻译： FCC催化剂添加剂及其制备方法
公开(公告)号：US20130023710A1
公开(公告)日：2013-01-24
申请号：US13231416
申请日：2011-09-13
申请人： Gopal Ravichandran , Praveen Kumar Chinthala , Tejas Doshi , Arun Kumar , Amit Gohel , Sukumar Mandal , Asit Kumar Das , Srikanta Dinda , Amit Kumar Parekh
发明人： Gopal Ravichandran , Praveen Kumar Chinthala , Tejas Doshi , Arun Kumar , Amit Gohel , Sukumar Mandal , Asit Kumar Das , Srikanta Dinda , Amit Kumar Parekh
IPC分类号： C07C1/20 , C07C4/06 , B01J29/06
CPC分类号： B01J29/40 , B01J29/06 , B01J29/08 , B01J29/084 , B01J29/18 , B01J29/7007 , B01J29/80 , B01J35/0006 , B01J35/002 , B01J35/1014 , B01J35/1019 , B01J37/0045 , B01J37/10 , B01J2229/186 , B01J2229/36 , B01J2229/42 , C10G11/05 , C10G11/18 , C10G2300/104 , C10G2300/1044
摘要： The present invention relates to a Fluid Catalytic Cracking (FCC) additive preparation process and composition, which has high efficiency in the production of light olefins C2, C3 and C4 hydrocarbons, specifically propylene. The present invention discloses the stabilization of medium pore zeolite specifically ZSM-5 using optimum phosphate salts at a pH in the range 7-9 with synergetic combination of silica rich binder to produce FCC additive having excellent stability under severe hydrothermal conditions.
摘要翻译：本发明涉及流动催化裂化（FCC）添加剂制备方法和组合物，其在轻质烯烃C2，C3和C4烃，特别是丙烯的生产中具有高效率。本发明公开了使用最佳磷酸盐在7-9的pH范围内稳定中孔沸石，特别是ZSM-5，同时具有富二氧化硅粘合剂的协同组合，从而生产在严苛的水热条件下具有优异稳定性的FCC添加剂。

5. 发明授权

US07604731B2 Process for the production of needle coke 有权
标题翻译：生产针状焦的工艺
公开(公告)号：US07604731B2
公开(公告)日：2009-10-20
申请号：US10892024
申请日：2004-07-15
申请人： Debasis Bhattacharyya , Satheesh Vetterkunnel Kumaran , Bandaru Venkata Hari Prasad Gupta , Pramod Kumar , Asit Kumar Das , Gadari Saidulu , Satyen Kumar Das , Gurpreet Singh Kapur , Veena Bansal , Venkatachalam Krishnan , Satish Makhija , Sobhan Ghosh , Niranjan Raghunath Raje
发明人： Debasis Bhattacharyya , Satheesh Vetterkunnel Kumaran , Bandaru Venkata Hari Prasad Gupta , Pramod Kumar , Asit Kumar Das , Gadari Saidulu , Satyen Kumar Das , Gurpreet Singh Kapur , Veena Bansal , Venkatachalam Krishnan , Satish Makhija , Sobhan Ghosh , Niranjan Raghunath Raje
IPC分类号： C10G51/02 , C10G9/00
CPC分类号： C10G9/005 , C10B55/00 , C10G51/023
摘要： A process is disclosed for producing needle coke from heavy atmospheric distillation residues having sulfur no more than 0.7 wt %, which process involves the steps of heating the feedstock to a temperature in the range of 440 to 520° C. for thermal cracking in a soaking column under pressure in the range of 1 to 10 kg/cm2 to separate the easily cokable material, separating the cracked products in a quench column and a distillation column and then subjecting the hydrocarbon fraction from the bottom of the quench column and a hydrocarbon fraction having a boiling point in the range of 380 to 480° C. from the distillation column and/or any other suitable heavier hydrocarbon streams in a definite ratio depending on certain characteristic parameters to thermal cracking in a second soaking column at a temperature of 460 to 540° C., pressure in the range of 2 to 20 kg/cm2 in presence of added quantity of steam for formation of a mesophase carbonaceous structure which on steam stripping and cooling forms a solid crystalline coke suitable for manufacturing of graphite electrode of large diameter having co-efficient of thermal expansion lower than 1.1×10−6/° C. measured on graphite artifact in the temperature range of 25 to 525° C.
摘要翻译：公开了一种用于从具有不超过0.7重量％的硫的重大气压蒸馏残余物生产针状焦炭的方法，该方法包括将原料加热至440-520℃范围内的温度以进行浸泡中的热裂解柱在1至10kg / cm2的压力范围内以分离容易结合的材料，将裂化产物在骤冷塔和蒸馏塔中分离，然后对来自骤冷塔的底部的烃馏分和具有取决于某些特征参数与第二个均热塔中的热裂解在460至540℃的温度下，从蒸馏塔和/或任何其它合适的较重烃流中的沸点在380至480℃范围内在蒸汽的形成中间相含碳结构的添加量存在下，在2至20kg / cm2的范围内的压力，在汽提和冷却形成适用于制造热膨胀系数小于1.1×10 -6 /℃的大直径石墨电极的固体结晶焦炭，在25至525℃的温度范围内测量石墨伪影。

6. 发明授权

US6153089A Upgradation of undesirable olefinic liquid hydrocarbon streams 有权
标题翻译：不期望的烯烃液态烃流的升级
公开(公告)号：US6153089A
公开(公告)日：2000-11-28
申请号：US282174
申请日：1999-03-31
申请人： Asit Kumar Das , Sukumar Mandal , Sobhan Ghosh , Debasis Bhattacharyya , Ganga Shanker Mishra , Jagdev Kumar Dixit , Arvind Pratap Singh , Ashok Kumar Tewari , Satish Makhija , Manoranjan Santra , Latoor Lal Saroya , Shankar Sharma , Satyen Kumar Das
发明人： Asit Kumar Das , Sukumar Mandal , Sobhan Ghosh , Debasis Bhattacharyya , Ganga Shanker Mishra , Jagdev Kumar Dixit , Arvind Pratap Singh , Ashok Kumar Tewari , Satish Makhija , Manoranjan Santra , Latoor Lal Saroya , Shankar Sharma , Satyen Kumar Das
IPC分类号： C10G11/05 , C10G11/18 , C10G35/095
CPC分类号： C10G35/095 , C10G11/05 , C10G11/18 , Y02P30/446
摘要： A process for converting undesirable olefinic hydrocarbon streams to hydrogen and petrochemical feedstock e.g. light olefins in C.sub.2 -C.sub.4 range and aromatics especially toluene and xylenes, which comprises simultaneous cracking and reforming at olefin rich hydrocarbons using a catalyst consisting of dehydrogenating metal components, shape selective zeolite components and large pore acidic components in different proportions in a circulating fluidized bed reactor-regenerator system having reactor temperature within 450-750.degree. C. and WHSV of 0.1-60 hour.sup.-1.
摘要翻译：将不期望的烯烃流转化为氢和石化原料的方法，例如在C2-C4范围内的轻质烯烃和芳族化合物，特别是甲苯和二甲苯，其包括在富含烯烃的烃中同时裂化和重整，所述催化剂在循环流化床中使用由脱氢金属组分，形状选择性沸石组分和不同比例的大孔酸性组分组成的催化剂反应器 - 再生器系统，反应器温度在450-750℃，WHSV为0.1-60小时-1。

7. 发明授权

US6149875A Fluidized catalytic cracking process and apparatus 有权
标题翻译：流化催化裂化工艺及装置
公开(公告)号：US6149875A
公开(公告)日：2000-11-21
申请号：US219459
申请日：1998-12-23
申请人： Marri Rama Rao , Vutukuru Lakshmi Narasimha Murthy , Sanjeev Singh , Asit Kumar Das , Sobhan Ghosh , Debasis Bhattacharyya , Satish Makhija , Sukumar Mandal
发明人： Marri Rama Rao , Vutukuru Lakshmi Narasimha Murthy , Sanjeev Singh , Asit Kumar Das , Sobhan Ghosh , Debasis Bhattacharyya , Satish Makhija , Sukumar Mandal
IPC分类号： C10G11/05 , C10G11/18 , B01J8/26
CPC分类号： C10G11/18 , C10G11/05
摘要： A fluidized catalytic cracking apparatus includes a riser containing a regenerated catalyst and adsorbant, and has a first inlet for introduction of high velocity steam, a second inlet for introduction of a feed stream containing heavy residual fractions with high concentrations of conradson coke, metals including vanadium and nickel, and additional poisons including nitrogen, a third inlet for introduction of an adsorbent, and a fourth inlet disposed above the third inlet means for introduction of a regenerated catalyst, the adsorbent having a particle size which is larger than that of the regenerated catalyst. A stripper is provided into which the riser extends for causing separation of a hydrocarbon fraction from spent catalyst and adsorbent, and a separator is connected to the stripper and has a base, an inlet at the base for introduction of steam in the upward direction so as to provide a transport velocity in the upward direction for the spent catalyst and cause a separation of the particles of the spent catalyst from the adsorbent in use. A regenerator is connected to the separator and has an outlet and is in flow communication with the fourth inlet for introduction of the regenerated catalyst into the riser. A burner is provided for receiving the adsorbent from the separator and for causing a regeneration thereof, the burner having an inlet for introduction of oxygen containing gas and an outlet in flow communication with the third inlet for introduction of the adsorbent into the riser. A lift line is connected between the separator and the regenerator for allowing a flow of the spent catalyst from the separator into the regenerator while leaving the adsorbent within the separator in a fluidized condition the lift line having a plurality of steam inlets disposed at different elevations along its length for introduction of steam to provide said transport velocity.
摘要翻译：流化催化裂化装置包括含有再生催化剂和吸附剂的提升管，并且具有用于引入高速蒸汽的第一入口，用于引入含有高浓度康拉多焦炭的重残余馏分的进料流的第二入口，包括钒的金属和镍，以及包括氮的附加毒物，用于引入吸附剂的第三入口，以及设置在第三入口装置上方以引入再生催化剂的第四入口，所述吸附剂的粒度大于再生催化剂的粒径。提供了一种汽提器，其中提升管延伸用于使烃馏分与废催化剂和吸附剂分离，并且分离器连接到汽提器并具有基座，底部是用于沿向上方向引入蒸汽的入口，以便为废催化剂向上提供输送速度，并在使用中引起废催化剂颗粒与吸附剂的分离。再生器连接到分离器并且具有出口并且与第四入口流动连通以将再生催化剂引入提升管。提供燃烧器用于从分离器接收吸附剂并引起其再生，燃烧器具有用于引入含氧气体的入口和与第三入口流动连通的出口，用于将吸附剂引入提升管中。升降线连接在分离器和再生器之间，用于允许废催化剂从分离器流入再生器，同时在分离器内留下吸附剂处于流化状态，提升管线具有沿着不同高度设置的多个蒸汽入口其引入蒸汽的长度以提供所述输送速度。

8. 发明授权

US6027696A Fluidized catalytic cracking apparatus 失效
标题翻译：流化催化裂化装置
公开(公告)号：US6027696A
公开(公告)日：2000-02-22
申请号：US843287
申请日：1997-04-11
申请人： Asit Kumar Das , Debasis Bhattacharyya , Sukumar Mandal , Vutukuru Lakshmi Narasimh Murthy , Sanjeev Singh , Marri Rama Rao , Sobhan Ghosh
发明人： Asit Kumar Das , Debasis Bhattacharyya , Sukumar Mandal , Vutukuru Lakshmi Narasimh Murthy , Sanjeev Singh , Marri Rama Rao , Sobhan Ghosh
IPC分类号： B01J8/26 , C10G11/18 , F27B15/14
CPC分类号： C10G11/18 , B01J8/26
摘要： A fluidized catalytic cracking apparatus for catalytically cracking a heavy hydrocarbon feed to lighter products includes a regenerator shell for heating spent catalyst, the regenerator shell having a bottom riser for introduction of the heavy hydrocarbon feed, a catalyst, and steam, and from which flows a stream, the bottom riser having a distributor for allowing the stream from the bottom riser to be distributed into a plurality of reaction tubes positioned within the regenerator shell; a catalyst separator connected to an upper end of the regenerator shell; a stripper connected to the catalyst separator to cause a stripping of the catalyst and the spent catalyst feed to the regenerator shell; and an air inlet provided in the regenerator shell so as to cause a combustion within the regenerator shell.
摘要翻译：用于将重质烃进料催化裂化成轻质产物的流化催化裂化装置包括用于加热废催化剂的再生器壳，再生器壳具有用于引入重质烃进料的底部提升管，催化剂和蒸汽，底部提升管具有用于允许来自底部提升管的流分配到位于再生器壳体内的多个反应管中的分配器; 连接到再生器壳体的上端的催化剂分离器; 连接到催化剂分离器以使催化剂和废催化剂进料进入再生器壳体的汽提塔; 以及设置在再生器壳体中以使再生器壳体内的燃烧的空气入口。

9. 发明授权

US08685232B2 Fluid catalytic cracking (FCC) process for manufacturing propylene and ethylene in increased yield 有权
标题翻译：用于制备丙烯和乙烯的流化催化裂化（FCC）方法，其产率增加
公开(公告)号：US08685232B2
公开(公告)日：2014-04-01
申请号：US13133759
申请日：2009-12-08
申请人： Sukumar Mandal , Asit Kumar Das , Ashwani Yadav , Manoj Yadav , Akhilesh Bhatnagar , Rajeshwar Dongara , Veera Venkata Satya Bhaskara Sita Rama Murthy Katravulapalli
发明人： Sukumar Mandal , Asit Kumar Das , Ashwani Yadav , Manoj Yadav , Akhilesh Bhatnagar , Rajeshwar Dongara , Veera Venkata Satya Bhaskara Sita Rama Murthy Katravulapalli
IPC分类号： C10G11/18 , C10G11/00 , C07C4/06 , C07C4/02
CPC分类号： C10G11/18 , C10G11/05 , C10G2400/20
摘要： Manufacture of propylene and ethylene in a FCC unit. Each FCC riser comprises an acceleration zone, a lift stream feed nozzle, a main hydrocarbon stock feed nozzle, and an olefinic naphtha feed nozzle. Mixed FCC catalyst comprising at least 2 percent by weight pentasil zeolite and at least 10 percent by weight Y-zeolite is injected at the bottom of each FCC riser. Olefinic naptha is injected through the olefinic feed nozzle, main hydrocarbon stock is injected through the main hydrocarbon stock feed nozzle and lift stream is injected through the lift stream feed nozzle. Lift stream comprises olefinic C4 hydrocarbon stream and optionally steam and/or a fuel gas. Olefinic C4 hydrocarbon steam is cracked in the acceleration zone at 600 to 800° C., 0.8 to 5 kg/cm2 (gauge) pressure, WHSV 0.2 to 100 hr up 1 and vapour residence time 0.2 to 5 seconds.
摘要翻译：在FCC装置中制造丙烯和乙烯。每个FCC提升管包括加速区，提升流进料喷嘴，主烃原料喷嘴和烯烃石脑油进料喷嘴。包含至少2重量百分比的pentasil沸石和至少10重量％Y-沸石的混合FCC催化剂注入每个FCC提升管的底部。通过烯烃进料喷嘴注入含油棕榈蜡，主要烃类原料通过主要烃类原料进料喷嘴注入，提升料流通过提升料流进料喷嘴注入。提升料流包括烯烃C 4烃料流和任选的蒸汽和/或燃料气体。烯烃C4烃蒸汽在600至800℃，0.8至5kg / cm2（表压）压力，WHSV 0.2至100小时升高1和蒸汽停留时间0.2至5秒的加速区域中开裂。

10. 发明申请

US20120172649A1 PROCESS FOR RECOVERY OF PROPYLENE AND LPG FROM FCC FUEL GAS USING STRIPPED MAIN COLUMN OVERHEAD DISTILLATE AS ABSORBER OIL 有权
标题翻译：从FCC燃料气中回收丙烯和液化石油气的方法使用分散的主塔作为吸油剂
公开(公告)号：US20120172649A1
公开(公告)日：2012-07-05
申请号：US13380928
申请日：2010-06-09
申请人： Manoj Yadav , Sukumar Mandal , Asit Kumar Das , Yogesh Gupta , Minaz Makhania , Gobind Tulsi , Shailendra Arora , Shubhangi Jaguste
发明人： Manoj Yadav , Sukumar Mandal , Asit Kumar Das , Yogesh Gupta , Minaz Makhania , Gobind Tulsi , Shailendra Arora , Shubhangi Jaguste
IPC分类号： C07C7/11
CPC分类号： C10G53/08 , C10G5/04 , C10G5/06 , C10G7/02 , C10G11/18 , C10G31/06 , C10G55/06 , C10G70/06 , C10G2300/301 , C10G2400/20 , C10G2400/26 , C10G2400/28
摘要： A process is disclosed for enhanced recovery of propylene and LPG from the fuel gas produced in Fluid catalytic cracking unit by contacting a heavier hydrocarbon feed with FCC catalyst. In the conventional process, the product mixture from FCC main column overhead comprising naphtha, LPG and fuel gas, are first condensed and gravity separated to produce unstabilized naphtha, which is subsequently used in the absorber to absorb propylene and LPG from fuel gas. However, the recovery of propylene beyond 97 wt % is difficult in this process since unstabilized naphtha already contains propylene of 5 mol % or above. In the present invention, C4 and lighter components from unstabilized naphtha are first stripped off in a separate column to obtain a liquid fraction almost free from propylene (
摘要翻译：公开了一种通过使较重的烃进料与FCC催化剂接触，从流化催化裂化装置产生的燃料气体中提高丙烯和LPG的回收率的方法。在常规方法中，首先将来自包含石脑油，液化石油气和燃料气体的FCC主塔架塔的产物混合物冷凝并重力分离以产生不稳定的石脑油，其随后用于吸收器以从燃料气体中吸收丙烯和LPG。然而，在该方法中丙烯的回收率超过97wt％是困难的，因为未稳定的石脑油已经含有5mol％或更高的丙烯。在本发明中，C4和来自不稳定石脑油的较轻组分首先在分开的塔中汽提，得到几乎不含丙烯（<0.1mol％）和其它LPG组分的液体组分。在吸收器中使用这种汽提的液体馏分，在冷却至20℃至30℃之后，从燃料气体中吸收较高量的丙烯和LPG，导致丙烯的回收率提高。

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