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Crude acrylonitrile tank

A kind of acrylonitrile, crude technology, used in tank trucks, carboxylic acid nitrile purification/separation, transportation of passenger cars, etc., can solve the problems of polymerization reaction, loss of acrylonitrile products, etc.

Active Publication Date: 2018-03-20
INEOS EURO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, crude acrylonitrile may be prone to polymerization and thus lose acrylonitrile product

Method used

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  • Crude acrylonitrile tank
  • Crude acrylonitrile tank

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Experimental program
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Embodiment Construction

[0015] Both temperature and pH monitoring and control are important for the storage of crude acrylonitrile. In this regard, a process includes detecting a plurality of temperatures of the liquid at different heights of the crude tank. The process includes: circulating a recycle stream drawn from the outflow height of the crude tank; cooling the recycle stream; and returning at least a portion of the recycle stream to the tank when the detected temperature is outside a predetermined temperature range .

[0016] Compared to conventional systems and methods, the process described herein is less time-consuming and may require fewer steps before the acrylonitrile product is released to final product storage. Laboratories and factories can be reduced in performing sample analysis and adjusting operating parameters to produce acceptable acrylonitrile product. Other benefits provided are that the number and / or volume of rundown tanks may be reduced relative to the number and / or volu...

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Abstract

The present disclosure relates to crude acrylonitrile tanks and provides a process for maintaining storage of crude acrylonitrile in the crude tanks. The process comprises: transferring the crude acrylonitrile to the crude tank; adding acid to the crude acrylonitrile in the crude tank in an amount suitable to maintain a pH below a target pH; and maintaining the temperature of the crude acrylonitrile in the crude tank below the target temperature.

Description

technical field [0001] The present disclosure relates to improved processes in the manufacture of acrylonitrile and methacrylonitrile. Specifically, the present disclosure relates to crude acrylonitrile tank operations. Background technique [0002] Acrylonitrile is an important mass-production chemical that is primarily used as a monomer in the manufacture of a variety of polymeric materials, such as polymers for acrylic fibers in textiles and resins such as ABS and SAN resins. Worldwide, more than four million metric tons of acrylonitrile are produced annually. The most common process for making acrylonitrile or other olefinically unsaturated nitriles such as methacrylonitrile is to use air or other source of molecular oxygen as an oxidant to cause the appropriate hydrocarbons to occur in an ammoxidation reactor in the presence of ammonia Chemical reactions such as the chemical reaction of propylene or propane for the production of acrylonitrile, or the chemical reaction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D88/74
CPCC07C253/32C07C253/34C07C255/08
Inventor T.R.麦克唐奈J.R.库奇D.R.瓦纳P.T.瓦赫滕多夫T.G.特拉弗斯
Owner INEOS EURO LTD