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Process for controlling partial regeneration of spent catalyst

一种废催化剂、催化剂的技术，应用在催化剂再生/再活化、分子筛催化剂、化学仪器和方法等方向，能够解决只能控制在小范围内等问题

Pending Publication Date: 2021-03-19
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, once the regenerator is designed, the amount of air supplied to the regenerator can only be controlled within a small range

Method used

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  • Process for controlling partial regeneration of spent catalyst

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Embodiment Construction

[0024] As noted above, the present invention provides one or more methods for partially regenerating spent catalyst from an MTO reaction zone, and methods for controlling the partial regeneration. With these general principles in mind, one or more embodiments of the invention will be described with the understanding that the following description is not intended to be limiting.

[0025] An exemplary MTO conversion process with a regeneration zone is shown in which a spent catalyst stream 10 is passed from an oxygenate reaction zone 12 to a regeneration zone 14 with a regenerator 16 . Oxygenate reaction zone 12 preferably includes an MTO reactor 18 in which feedstock 20 comprising methanol is contacted with a catalyst comprising molecular sieves under conditions suitable for converting the methanol to light olefins in effluent stream 22 . The catalyst may be silicoaluminophosphate (SAPO), which has a framework of tetrahedral units forming many pores for optimal access to the me...

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Abstract

The present invention discloses a method of controlling the regeneration of a spent catalyst from an oxygenate-to-olefin reaction zone in order to provide a partially regenerated catalyst. The partially regenerated catalyst has between 1 to 4, or 1 to 3, or, 2 to 3 wt% coke. The regeneration is controlled by adjusting a ratio of air to recycled flue gas in the combustion gas passed to the regeneration zone. CO in the flue gas is removed in a CO oxidation zone which receives oxygen to oxidize CO to CO2.

Description

technical field [0001] The present invention relates to methods for controlling the regeneration of spent catalysts used in oxygenates for olefin conversion processes, and more particularly to methods of controlling various parameters to obtain partially regenerated catalysts with a desired amount of coke. Background technique [0002] Light olefins are used as feedstock for the production of a wide variety of chemicals and are traditionally produced by steam or catalytic cracking processes. However, due to the limited availability and high cost of petroleum sources, the cost of producing light olefins from such petroleum sources has steadily increased. [0003] The search for alternative materials for light olefin production has led to the use of oxygenates such as alcohols, and more specifically methanol, ethanol and higher alcohols or their derivatives. Molecular sieves such as microporous crystalline zeolites and non-zeolitic catalysts, especially silicoaluminophosphate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/00B01J38/14
CPCB01J38/14B01J29/90B01J29/40B01J29/85B01J19/0006B01J2219/00182B01J2219/00229B01J38/00B01J38/18
Inventor 约翰·J·塞内塔
Owner UOP LLC