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Polymerization inhibitor and application thereof in acrylonitrile production device
A technology for production equipment and polymerization inhibitors, which is applied in the fields of purification/separation of carboxylic acid nitriles, preparation of hydrocarbon ammoxidation, organic chemistry, etc., and can solve the problems of long-term safe and stable operation of acrylonitrile equipment and poor inhibition effect of hydroquinone , material loss and other issues, to achieve significant economic and social benefits, prolong the production cycle, and inhibit the effect of free radical polymerization
Inactive Publication Date: 2017-06-30
北京誉天利化工有限公司 +1
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Problems solved by technology
However, due to the poor polymerization inhibition effect of hydroquinone, more polymers will still be produced in the above-mentioned parts during the production process, which is the main factor affecting the long-term operation of the acrylonitrile plan
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The invention discloses a polymerization inhibitor and an application thereof in an acrylonitrile production device. The polymerization inhibitor comprises components A, B and C, wherein the component A is an alkyl-N-heterocyclic compound containing free radicals of nitrogen and oxygen, the component B is butyl hydroxy anisol, the component C is para-tert-butylcatechol, and the mass ratio of the component A, the component B and the component C is (6-20):(1-5):(10-30). By utilizing the polymerization inhibitor provided by the invention, the polymerization of free radicals of acrylonitrile can be effectively inhibited, thereby greatly prolonging the production operation cycle of the device.
Description
technical field [0001] The invention belongs to the technical field of acrylonitrile production, and in particular relates to a preparation method and application of a polymerization inhibitor used in a drying tower, a dehydrocyanic acid tower or a finished product tower in an acrylonitrile production device. Background technique [0002] Acrylonitrile (AN) is an important monomer in the organic synthesis industry. Due to the double bond in its structural formula, its chemical properties are relatively active, and chemical reactions such as self-polymerization, copolymerization, and hydrolysis will occur. in the production process [0003] In the process, due to the occurrence of acrylonitrile polymerization, on the one hand, the product yield decreases; on the other hand, the polymer deposits in the system, causing blockage of heat exchangers, trays and process pipes. [0004] At present, the most commonly used polymerization inhibitor for acrylonitrile units is hydroquin...
Claims
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Login to View More IPC IPC(8): C07C253/26C07C253/32C07C253/34C07C255/08
CPCC07C253/26C07C253/32C07C253/34
Inventor 蒋晓明
Owner 北京誉天利化工有限公司
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