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Polymerization inhibitor for preventing alkyne polymerization

A polymerization inhibitor and alkyne technology, applied in the purification/separation of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve problems such as safety hazards, reduce equipment operation cycle and production efficiency, block 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 transfer efficiency, cause safety hazards, and reduce equipment operation cycle and production efficiency

Method used

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  • Polymerization inhibitor for preventing alkyne polymerization
  • Polymerization inhibitor for preventing alkyne polymerization
  • Polymerization inhibitor for preventing alkyne polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 100 parts of analytically pure N-methylpyrrolidone liquid in a stainless steel reactor with jacket heating and stirring; dissolve the polymerization inhibitor in the solvent and add it to the N-methylpyrrolidone liquid, and the A component in the polymerization inhibitor is Methylhydroxylamine, B component is pyridine, C component is benzaldehyde benzoylhydrazone, the mass ratio of A component, B component and C component is: 50:30:20, solvent is isopropanol, hindering The mass ratio of the polymerization agent to the solvent is 1:5, based on the total mass of the N-methylpyrrolidone solution after adding the polymerization inhibitor and the solvent, the addition amount of the polymerization inhibitor is 500 μg / g; at 115°C and 0.1MPa After 50 hours, the N-methylpyrrolidone solution dissolved with the alkyne mixed gas was sampled, and the total polymer production was analyzed by HP7890 gas chromatograph. Based on the total mass of substances present in the sampled sa...

Embodiment 2

[0027] Add 100 parts of analytically pure N-methylpyrrolidone liquid in a stainless steel reactor with jacket heating and stirring; dissolve the polymerization inhibitor in the solvent and add it to the N-methylpyrrolidone liquid, and the A component in the polymerization inhibitor is Methylhydroxylamine, B component is pyridine, C component is benzaldehyde benzoylhydrazone, the mass ratio of A component, B component and C component is: 55:30:15, solvent is isopropanol, hindering The mass ratio of the polymerization agent to the solvent is 1:5, based on the total mass of the N-methylpyrrolidone solution after adding the polymerization inhibitor and the solvent, the addition amount of the polymerization inhibitor is 500 μg / g; at 115°C and 0.1MPa After 50 hours, the N-methylpyrrolidone solution dissolved with the alkyne mixed gas was sampled, and the total polymer production was analyzed by HP7890 gas chromatograph. The mass fraction of the total polymer is 3.04% based on the to...

Embodiment 3

[0029] Add 100 parts of analytically pure N-methylpyrrolidone liquid in a stainless steel reactor with jacket heating and stirring; dissolve the polymerization inhibitor in the solvent and add it to the N-methylpyrrolidone liquid, and the A component in the polymerization inhibitor is Methylhydroxylamine, B component is pyridine, C component is benzaldehyde benzoylhydrazone, the mass ratio of A component, B component and C component is: 55:25:20, solvent is isopropanol, hindering The mass ratio of the polymerization agent to the solvent is 1:5, based on the total mass of the N-methylpyrrolidone solution after adding the polymerization inhibitor and the solvent, the addition amount of the polymerization inhibitor is 500 μg / g; at 115°C and 0.1MPa After 50 hours, the N-methylpyrrolidone solution dissolved with the alkyne mixed gas was sampled, and the total polymer production was analyzed by HP7890 gas chromatograph. The mass fraction of the total polymer is 2.97% based on the to...

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Abstract

The invention relates to a polymerization inhibitor for preventing 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 polymerization inhibitor is composed of the following components in percentages by weight: 50 to 60 wt% of component A namely hydroxylamine compounds or / and morpholine 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 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 polymerization inhibitor, in particular to a polymerization inhibitor suitable for preventing alkyne polymerization in the acetylene process produced by natural gas partial oxidation. 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] Document CN102766008A discloses a carbon three poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/20C07C11/24
Inventor 田立达陈亮顾军民张斌
Owner CHINA PETROLEUM & CHEM CORP
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