Polymerization inhibitor for preventing self-polymerization or co-polymerization of C5 diolefins

A technology of polymerization inhibitor and diolefin, which is applied in the field of self-polymerization or copolymerization inhibitor, can solve the problem that the polymerization inhibitor is not very suitable, and achieve the effect of good polymerization inhibition effect.

Inactive Publication Date: 2005-11-23
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
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Problems solved by technology

In addition, compounds such as hydroxylamines, diamines, oximes and alcoholamines are often used as inhibitors to inhibit the polymerization of olefins in petroleum processing, but considering the use of inhibitors in the existing C5 It should be easy to be separated during the separation process of the parts, so as not to affect the quality of the final separated product. These existing polymerization inhibitors are not very suitable

Method used

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  • Polymerization inhibitor for preventing self-polymerization or co-polymerization of C5 diolefins

Examples

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Embodiment 1～10

[0011] 1. Preparation of polymerization inhibitor

[0012] The required amount of component A diethylhydroxylamine and component B tert-butylcatechol are dissolved in a solvent to prepare a polymerization inhibitor for future use, and the total content of component A and component B is controlled to be 30-40 wt%. The specific solvents used in each embodiment, and the weight ratio of component A to component B are listed in Table 2.

[0013] 2. Sealing test of polymerization inhibitor

[0014] In a 500ml plastic bottle, a 450ml carbon five fraction sample is loaded, and the sample components are shown in Table 1. Then the polymerization inhibitor prepared by each of the above-mentioned embodiments is added in the plastic bottle according to the required amount. Place a rusty iron nail in a 30ml glass seal tube, then take out 15ml carbon five sample from the plastic bottle and inject it into the glass seal tube and then seal it. Place the sealed tube in a constant temperature...

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Abstract

The invention relates to a polymerization inhibitor for preventing self-polymerization or co-polymerization of C5 diolefins, which comprises composition A: diethylhydroxylamine, composition B: tert-butyl pyrocatechol, and solvent, wherein the solvent is selected from benzene, toluene, dimethylbenzene or ethylbenzene, the weight ratio of the composition A and the composition B being (0.5-6):1, the total content of the composition A and the composition B in the polymerization inhibitor being 25-45wt%. Compared with the prior art, the invention can realize better polymerization inhibiting effect, and no extra separation process is needed in the current C5 distillate separation procedure.

Description

technical field [0001] The invention relates to a polymerization inhibitor for inhibiting self-polymerization or copolymerization of conjugated diolefins, in particular to a polymerization inhibitor for inhibiting self-polymerization or copolymerization of diolefins in petroleum carbon five fractions. Background technique [0002] In the process of producing ethylene from petroleum cracking, a considerable amount of carbon five fractions are produced by-products, and the carbon five fractions contain about 40-60% of diolefins such as isoprene, cyclopentadiene, and piperylene. These diolefins The chemical properties are active, and it is an important raw material for many fine chemical products. Therefore, the separation and utilization of C5 fractions are very meaningful for improving the economic benefits of ethylene plants and comprehensively utilizing petroleum resources. However, the C5 fraction is composed of more than 20 components with similar boiling points and easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/173
Inventor 陈国忠赵金男吴忠平潘奇艳宋建平
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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