08-08-2019 дата публикации
Номер: US20190241822A1
Provided is a composition for removing iron sulfide, containing, as an active ingredient, an α,β-unsaturated aldehyde represented by the following general formula (1): 2. The composition according to claim 1 , wherein Rto Rare each independently a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.3. The composition according to claim 1 , wherein Ris a hydrogen atom.4. A method for removing iron sulfide claim 1 , the method comprising{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'contacting the composition of with iron sulfide.'}5. The method according to claim 4 , wherein the α claim 4 ,β-unsaturated aldehyde in the composition is added in an amount of 0.1 to 100 parts by mass based on 1 part by mass of iron sulfide.6. The method according to claim 4 , wherein said contacting occurs at a temperature of from −30° C. to 150° C.7. A method for removing iron sulfide claim 4 , the method comprising{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'removing iron sulfide using the composition according to .'} The present invention relates to a composition for removing iron sulfide and a method for removing iron sulfide, which includes using the same.Hydrogen sulfide that often exists in hydrocarbons, such as fossil fuels and refined petroleum products, for example, natural gas, liquefied natural gas, sour gas, crude oil, naphtha, heavy aromatic naphtha, gasoline, kerosene, diesel oil, light oil, heavy oil, FCC slurry, asphalt, and oil field concentrates, corrodes iron which is used in excavation facilities, etc., to cause generation of iron sulfide. The iron sulfide is accumulated as a deposit within production facilities of fossil fuels and refined petroleum products, to lower operational efficiency of instruments in heat exchanger, cooling tower, reactor, transmission pipeline, furnace, etc., or disturb precise measurement for facility maintenance, and therefore, it is desired to remove this.As a method for removing iron sulfide, a method of dissolving iron ...
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