公开(公告)号：US09573865B2

公开(公告)日：2017-02-21

申请号：US14347797

申请日：2012-10-11

Applicant: INDIAN OIL CORPORATION LTD.

Inventor： Manoj Kumar Bhuyan ,  Debasis Bhattacharyya ,  Gopinath Bhanuprasad Sayapaneni ,  Somnath Kukade ,  Satheesh Kumaran Vetterkunnel

IPC: C07C4/06 ,  C10G11/18

CPC classification number: C07C4/06 ,  C10G11/18 ,  C10G11/187 ,  C10G2300/1044 ,  C10G2300/107 ,  C10G2300/1077 ,  C10G2300/4006 ,  C10G2300/4025 ,  C10G2300/4081 ,  C10G2300/4093 ,  C10G2300/708 ,  C10G2400/20

Abstract: A process for increasing the yield of C3 olefin in fluidized bed catalytic cracking of hydrocarbon feedstocks is disclosed. C4 fraction produced from the cracking of hydrocarbon feedstock in the primary reaction zone (riser), optionally with external source of C4 stream is fed into the stripper which acts as a secondary reaction zone at an elevated temperature and at an optimum WHSV. The elevated temperature is achieved by injecting a part of the regenerated catalyst from regenerator, which is at a higher temperature, directly into the stripper through a dedicated additional lift line. This raises the activity of catalyst inside the stripper. The direct injection of regenerated catalyst into the stripper, besides producing higher yields of propylene, improves the stripping efficiency leading to enhanced recovery of strippable hydrocarbons.

Abstract translation: 公开了一种用于提高烃原料流化床催化裂化中C3烯烃产率的方法。 在主反应区（提升管）中的烃原料的裂化产生的C4馏分，任选地与外部的C4源流一起进料到汽提塔中，其在升高的温度和最佳的WHSV下作为二次反应区。 升高的温度通过将再生催化剂的一部分从更高温度的再生器通过专用的附加提升管线直接注入汽提塔来实现。 这提高了汽提器内催化剂的活性。 再生催化剂直接注入汽提器，除了产生更高的丙烯产率之外，提高了汽提效率，从而提高可汽提烃的回收率。