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Control for ammonia feed for ammonia oxidation reactor

A technology of ammoxidation reaction and reactor, which is applied in the preparation of hydrocarbon ammoxidation, the preparation of organic compounds, and feeding devices, etc., which can solve the problems of redundancy and lack of accuracy

Pending Publication Date: 2017-10-17
INEOS EURO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, this lack of precision can cause significant problems when fresh catalysts are used, since fresh catalysts are known to exhibit significant ammonia burning, ie ammonia is oxidized directly to nitrogen oxides and water, both of which are redundant and can change rapidly over time

Method used

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  • Control for ammonia feed for ammonia oxidation reactor
  • Control for ammonia feed for ammonia oxidation reactor

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Embodiment Construction

[0023] The following description is not presented in a limiting sense, but merely for the purpose of describing the general principles of the exemplary embodiments. Aspects of the invention should be determined with reference to the claims.

[0024] Ammonia Control

[0025] Fine control of the amount of ammonia fed to the commercial acrylonitrile reactor is achieved according to the present invention by adjusting the NH in the controller 38 3 / C 3 = A specific set point is used to control the operation of the ammonia control valve 32 in response to the measured pH of the quench water bottom in the quench tower 30 . Such as figure 2 As shown, pH sensor 37 continuously monitors the pH at the bottom of the quench water tower in quench tower 30 . Sensor 37 is electronically connected to controller 38 . In addition, the controller 38 is programmed to modify its predetermined NH 3 / C 3 = The specific set point (which is used in response to the measured flow rate F of inc...

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Abstract

The invention relates to control for an ammonia feed for an ammonia oxidation reactor and particularly provides a process and system for controlling the content of ammonia and / or air supplied to the ammonia oxidation reactor. The process comprises the steps of keeping pH of the bottom of chilled water, adjusting the ammonia content in a feed for the reactor to provide an ammonia-hydrocarbon ratio of about 1-2 for the feed for the reactor. In addition, the process also comprises the step of adjusting the air content in the feed for the reactor to provide an air-hydrocarbon ratio of about 9-10 for the feed for the reactor.

Description

[0001] This application is a divisional application of a patent application submitted on June 27, 2014 (Chinese national application number is 201410295420.7, and the title of the invention is "control of ammonia feed for ammoxidation reactor"). technical field [0002] A process for controlling the amount of ammonia and / or air provided to an ammoxidation reactor is provided. More specifically, the process includes maintaining the pH of the quench water bottom and adjusting the amount of ammonia in the reactor feed to provide an ammonia to hydrocarbon ratio of about 1 to about 2 in the reactor feed. Additionally, the process may include adjusting the amount of air in the reactor feed to provide an air to hydrocarbon ratio in the reactor feed of about 9 to about 10. Background technique [0003] In the commercial manufacture of acrylonitrile, propylene, ammonia, and oxygen react together according to the following reaction scheme: [0004] CH 2 =CH-CH 3 +NH 3 +3 / 2O 2 →CH...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J4/00B01J8/24C07C255/08C07C253/18
CPCB01J4/008B01J8/1809B01J8/1818B01J8/24C07C253/18B01J2208/00893C07C255/08B01J8/1827B01J8/1836B01J2208/00141B01J2208/00592B01J2208/00911B01J2219/00202B01J2219/00231B01J2208/00628C07C253/24
Inventor T.R.麦克唐奈J.R.库赫D.R.沃格纳P.T.沃赫滕多夫T.G.特拉弗斯
Owner INEOS EURO LTD