Gas and liquid distributor for bubble column reactor
US-11896970-B2 · Feb 13, 2024 · US
Catalyst feed control during catalyst transition periods
US8940239B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8940239-B2 |
| Application number | US-201414465525-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 21, 2014 |
| Priority date | May 4, 2011 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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Techniques are provided for operating a reactor during a catalyst transition period. The instantaneous reaction rate during a catalyst transition period can be determined using real-time measured process variables, and material balance calculations to provide an instantaneous reaction rate in approximately real time. According to certain embodiments, a material balance can be performed on the reactor system using a continuous ideal stirred tank reactor to determine the fractions of each type of catalyst that are present in the reactor, as well as the overall weight percent of catalyst in the reactor. A controller can then calculate the overall instantaneous reaction rate based on the respective catalyst fractions and the overall weight percent of catalyst in the reactor. The catalyst feed rate can then be adjusted based on the determined instantaneous reaction rate to maintain the instantaneous reaction rate within desired limits during a catalyst transition period.
First claim
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What is claimed is: 1. A reactor system, comprising: a reactor configured to polymerize monomer into polymer solids; a monomer feed system configured to feed the monomer to the reactor; a catalyst feed system configured to feed a first catalyst and a second catalyst to the reactor; and a control system configured to perform a material balance on the reactor to determine respective fractions of the first catalyst and the second catalyst in the reactor during a catalyst transi…
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Frequently asked questions
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- What does patent US8940239B2 cover?
- Techniques are provided for operating a reactor during a catalyst transition period. The instantaneous reaction rate during a catalyst transition period can be determined using real-time measured process variables, and material balance calculations to provide an instantaneous reaction rate in approximately real time. According to certain embodiments, a material balance can be performed on the r…
- Who is the assignee on this patent?
- Chevron Phillips Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification B01J8/224. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).