High-grade alkyne combined polymerization inhibitor
A technology of polymerization inhibitor and alkyne, which is applied in the purification/separation of hydrocarbons and hydrocarbons, chemical instruments and methods, etc., and can solve problems such as safety hazards, affecting heat transfer efficiency, blocking equipment or pipelines, etc.
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Embodiment 1
[0021] In airtight stainless steel reactor, add 100gN-methylpyrrolidone; Record in the mass fraction of advanced alkyne combined polymerization inhibitor, comprise 25 parts of trimethylhydroxylamine, the mixture of 15 parts of nitropyridine and pyridine in its polymerization inhibitor, Wherein the mass ratio of nitropyridine and pyridine is 3:1, 60 parts of hydrogen peroxide; the mixed gas of acetylene product produced by partial oxidation of natural gas is passed into bubbling mode for 1 hour, and the content of higher alkynes in the mixed gas is 2.0% by volume; Add 0.001 g of advanced alkyne combined inhibitor by injection every 1 minute; analyze the polymer content by online chromatography every 20 minutes; when the polymer content reaches 0.7% to 0.9%, stop the advanced alkyne combined inhibitor After 50 hours, the polymer content was analyzed to be 1.05%, and the addition of the higher alkyne combination inhibitor was 91 micrograms per gram.
Embodiment 2
[0023] In airtight stainless steel reactor, add 100gN-methylpyrrolidone; Record in the mass fraction of advanced alkyne combined polymerization inhibitor, comprise the mixture of 25 parts of isopropyl hydroxylamine, 15 parts of nitropyridine and pyridine in its polymerization inhibitor, Wherein the mass ratio of nitropyridine and pyridine is 3:1, 60 parts of hydrogen peroxide; the mixed gas of acetylene product produced by partial oxidation of natural gas is passed into bubbling mode for 1 hour, and the content of higher alkynes in the mixed gas is 2.0% by volume; Add 0.001 g of advanced alkyne combined inhibitor by injection every 1 minute; analyze the polymer content by online chromatography every 20 minutes; when the polymer content reaches 0.7% to 0.9%, stop the advanced alkyne combined inhibitor After 50 hours, the analysis polymer content was 0.96%, and the addition of higher alkyne combination inhibitor was 100 micrograms / gram.
Embodiment 3
[0025] Add 100g of N-methylpyrrolidone in a closed stainless steel reactor; it is recorded in parts by mass of higher alkyne combined inhibitors, and the inhibitors include 25 parts of a mixture of trimethylhydroxylamine and isopropylhydroxylamine, of which trimethylhydroxylamine The mass ratio of hydroxylamine and isopropyl hydroxylamine is 2:1, the mixture of 15 parts of nitropyridine and pyridine, wherein the mass ratio of nitropyridine and pyridine is 3:1, 60 parts of hydrogen peroxide; Inject the mixed gas of acetylene products produced by the partial oxidation of natural gas for 1 hour, and the content of higher alkynes in the mixed gas is 2.0% by volume; add 0.001 g of higher alkyne combination inhibitors every 1 minute by injection drop; every 20 minutes online Chromatographic analysis of the polymer content; when the polymer content reached 0.7% to 0.9%, the addition of the high-level alkyne combination inhibitor was stopped; after 50 hours, the analysis of the polymer...
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