Compounded polymerization inhibitor for inhibiting alkyne polymerization

A technology of alkynes and resistance distribution, applied in the purification/separation of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve problems such as safety hazards, affecting heat transfer efficiency, blocking equipment or pipelines, etc.

Active Publication Date: 2016-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These polymers deposit and scale inside equipment and pipelines, block equipment or pipelines, affect heat

Method used

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  • Compounded polymerization inhibitor for inhibiting alkyne polymerization
  • Compounded polymerization inhibitor for inhibiting alkyne polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 100 parts of analytically pure N-methylpyrrolidone liquid into a stainless steel reactor with jacket heating and stirring; dissolve the compounded polymerization inhibitor in the solvent and add it to the N-methylpyrrolidone liquid; A component is ethanolamine, B component is pyridine, C component is benzaldehyde benzoylhydrazone, the mass ratio of A component, B component and C component is: 50:30:20, and the solvent is isopropanol , the mass ratio of the composite polymerization inhibitor and the solvent is 1:5, based on the total mass of the N-methylpyrrolidone solution after adding the composite polymerization inhibitor and the solvent, the addition of the composite polymerization inhibitor is 500 μg / g; The mixed gas of alkyne was passed through by bubbling to make it fully absorbed and dissolved; after 50 hours, the N-methylpyrrolidone solution dissolved in the mixed gas of alkyne was sampled, and the total polymer production was analyzed by HP7890 gas chromatog...

Embodiment 2

[0030] Add 100 parts of analytically pure N-methylpyrrolidone liquid into a stainless steel reactor with jacket heating and stirring; dissolve the compounded polymerization inhibitor in the solvent and add it to the N-methylpyrrolidone liquid; A component is ethanolamine, B component is pyridine, C component is benzaldehyde benzoylhydrazone, the mass ratio of A component, B component and C component is: 55:30:15, and the solvent is isopropanol , the mass ratio of the composite polymerization inhibitor and the solvent is 1:5, based on the total mass of the N-methylpyrrolidone solution after adding the composite polymerization inhibitor and the solvent, the addition of the composite polymerization inhibitor is 500 μg / g; Under the conditions of 115°C and 0.1MPa, the mixed gas of alkyne was introduced by bubbling to make it fully absorbed and dissolved; after 50 hours, the N-methylpyrrolidone solution dissolved in the mixed gas of alkyne was sampled and analyzed by HP7890 gas chrom...

Embodiment 3

[0032] Add 100 parts of analytically pure N-methylpyrrolidone liquid into a stainless steel reactor with jacket heating and stirring; dissolve the compounded polymerization inhibitor in the solvent and add it to the N-methylpyrrolidone liquid; A component is ethanolamine, B component is pyridine, C component is benzaldehyde benzoylhydrazone, the mass ratio of A component, B component and C component is: 55:25:20, and the solvent is isopropanol , the mass ratio of the composite polymerization inhibitor and the solvent is 1:5, based on the total mass of the N-methylpyrrolidone solution after adding the composite polymerization inhibitor and the solvent, the addition of the composite polymerization inhibitor is 500 μg / g; Under the conditions of 115°C and 0.1MPa, the mixed gas of alkyne was introduced by bubbling to make it fully absorbed and dissolved; after 50 hours, the N-methylpyrrolidone solution dissolved in the mixed gas of alkyne was sampled and analyzed by HP7890 gas chrom...

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Abstract

The invention relates to a compounded polymerization inhibitor for inhibiting alkyne polymerization, and aims to solve the problems that in the natural gas partial oxidation process for producing acetylene, the alkyne polymerization happens easily, the system and pipelines are obstructed, and the normal operation of devices is influenced. The compounded polymerization inhibitor is composed of the following components in percentages by weight: 50 to 60 wt% of component A namely ethanol amine compounds, 20 to 30 wt% of component B namely pyridine or/and nitropyridine, and 10 to 20 wt% of component C namely acylhydrazone compounds. The provided compounded polymerization inhibitor well solves the technical problems mentioned above, and can be applied to natural gas partial oxidation process for producing acetylene so as to prevent alkyne polymerization.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a compound polymerization inhibitor, in particular to a compound polymerization inhibitor suitable for inhibiting the polymerization of alkyne in the process of producing acetylene by partial oxidation of natural gas. Background technique [0002] In addition to the production of acetylene, the process of partial oxidation of natural gas to acetylene also by-products propyne, butyne, diacetylene, vinyl acetylene and propadiene. These alkynes are active in nature, and under the influence and action of various factors such as high temperature, trace oxygen, peroxide, and iron ions, they are prone to free radical polymerization to form polymers. These polymers deposit and scale inside equipment and pipelines, block equipment or pipelines, affect heat transfer efficiency, cause safety hazards, and reduce equipment operating cycles and production efficiency. [0003] The prior art mainl...

Claims

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Application Information

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IPC IPC(8): C07C7/20C07C11/24
Inventor 田立达顾军民张斌
Owner CHINA PETROLEUM & CHEM CORP
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