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Compound polymerization inhibitor

A technology of polymerization inhibitor and resistance distribution, which is applied in the fields of hydrocarbons, chemical instruments and methods, organic chemistry, etc., and can solve problems such as reducing equipment operation cycle and production efficiency, affecting heat transfer efficiency, and potential safety hazards

Active Publication Date: 2016-05-11
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 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 hexamethylenetetramine, C component is benzaldehyde benzoylhydrazone, the mass ratio of A component, B component and C component is: 63:18:19, The solvent is isopropanol, and the mass ratio of the compounded polymerization inhibitor and the solvent is 1:3. In terms of the total mass of the N-methylpyrrolidone solution after adding the compounded polymerization inhibitor and the solvent, the amount of the compounded polymerization inhibitor added 500μg / g; bubbling the alkyne mixed gas to make it fully absorbed and dissolved; 50 hours later, sample the N-methylpyrrolidone solution dissolved in the alkyne mixed gas, and analyze the total polymer with HP7890 gas chromatograph Generation volume. Th...

Embodiment 2

[0026] 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 hexamethylenetetramine, C component is benzaldehyde benzoylhydrazone, the mass ratio of A component, B component and C component is: 60:20:20, The solvent is isopropanol, and the mass ratio of the compounded polymerization inhibitor and the solvent is 1:3. In terms of the total mass of the N-methylpyrrolidone solution after adding the compounded polymerization inhibitor and the solvent, the amount of the compounded polymerization inhibitor added 500μg / g; under the conditions of 115°C and 0.1MPa, bubbling alkyne mixed gas to make it fully absorbed and dissolved; after 50 hours, sample the N-methylpyrrolidone solution dissolved in alkyne mixed gas, The total polymer formation was analyzed by HP78...

Embodiment 3

[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 diethanolamine, B component is hexamethylenetetramine, C component is benzaldehyde benzoylhydrazone, the mass ratio of A component, B component and C component is: 63:18:19 , the solvent is isopropanol, and the mass ratio of the composite polymerization inhibitor and the solvent is 1:3, based on the total mass of N-methylpyrrolidone solution after adding the composite polymerization inhibitor and solvent, the addition of the composite polymerization inhibitor The amount is 500μg / g; under the conditions of 115°C and 0.1MPa, the alkyne mixed gas is bubbled in to make it fully absorbed and dissolved; after 50 hours, take a sample of the N-methylpyrrolidone solution dissolved in the alkyne mixed gas , The total polymer product...

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Abstract

The invention relates to a compound polymerization inhibitor. The compound polymerization inhibitor solves the technical problem that the gas partial oxidation method for preparing acetylene easily causes alkyne polymerization so that a system and a pipe are blocked and device normal operation is influenced. The compound polymerization inhibitor comprises, by mass, 60-70% of an ingredient A, 10-20% of an ingredient B and 10-20% of an ingredient C. The ingredient A comprises one or more of an ethanol amine compound, a hydroxylamine compound and a morpholine compound. The ingredient B is hexamine. The ingredient C is an acylhydrazone compound. The compound polymerization inhibitor solves the above problems and can be used in the field of alkyne polymerization inhibition in the process for preparing acetylene through gas partial oxidation.

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