Ferrous sulfide cleaning composition and application thereof
A technology of ferrous sulfide and composition, which is applied in the direction of detergent composition, organic detergent composition, surface active detergent composition, etc., and can solve the problems of copper salt secondary pollution, secondary corrosion, secondary pollution, etc. Achieve the effect of stable chemical properties, good safety and fast speed
Active Publication Date: 2020-12-18
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
The above patents use strong oxidants such as sodium hypochlorite and potassium permanganate, which are prone to secondary pollution
CN102877079A discloses a method for removing ferrous sulfide that is applicable to oil industry pipelines and equipment. The method adds 10-1000mg / L surfactant, 10-100mg / L phase transfer catalyst (citric acid, benzoic acid) to the cleaning water. , at least one of sulfamic acid and organic phosphonic acid) and 0.001-1% soluble copper salt (at least one of copper sulfate, copper nitrate and copper chloride), pH 5-7, copper is used in the method Salt, it is easy to cause secondary corrosion and copper plating, and the sewage of copper salt is also easy to cause secondary pollution
Method used
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Embodiment 1
[0028] In a 250ml beaker equipped with an electromagnetic stirrer, add 50ml of water, 5g of glyoxal, 3g of 2,5-dimethyl-4-hydroxy-3[2H]-furanone, 5g of citric acid, and 0.5g of TX-4, 0.025g of 2#AA / AMPS, stir to dissolve, continue to add water to the required amount under stirring, adjust to 100g solution, and obtain ferrous sulfide cleaning agent.
Embodiment 2
[0030] In a 250ml beaker equipped with an electromagnetic stirrer, add 10g glyoxal, 5g 2,5-methyl-4-hydroxy-3[2H]-furanone, 1g formic acid, 0.1g OE-6, 0.01g 1#AA / AMPS, 5g ethanol, stirring to dissolve, under stirring, continue to add water to the required amount, adjust to 100g solution, and obtain the ferrous sulfide cleaning agent.
Embodiment 3
[0032] In a 250ml beaker equipped with an electromagnetic stirrer, add 2g of glyoxal, 1g of 2,5-methyl-4-hydroxy-3[2H]-furanone, 10g of citric acid, 1g of MOA-6, 0.05 gram of AA / AHPSE, stir to dissolve, and continue to add water to the required amount under stirring, and adjust to 100g of solution to obtain the ferrous sulfide cleaning agent.
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The invention belongs to the technical field of petrochemical industry and discloses a composition for ferrous sulfide cleaning and application thereof in ferrous sulfide cleaning. The composition comprises alkylene dialdehyde, hydroxyl alkyl furanone, organic acid, polyoxyethylene ether type nonionic surfactant and acrylic acid type dispersing agent containing sulfonic groups, wherein the weightratio of the alkylene dialdehyde to the hydroxyl alkyl furanone to the organic acid to the polyoxyethylene ether type nonionic surfactant to the acrylic acid type dispersing agent is 100:(20-150):(5-600):(1-100):(0.1-10). In addition, the invention further discloses a ferrous sulfide cleaning method. The ferrous sulfide cleaning method includes: allowing the composition to contact with to-be-cleaned equipment. The composition has the advantages that when the composition is used to clean ferrous sulfide dirt, hydrogen sulfide gas generation is avoided; the composition is fast in dirt removing,good in safety and convenient to use.
Description
technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a ferrous sulfide cleaning composition for preventing spontaneous combustion of ferrous sulfide in petrochemical equipment and its application. Background technique [0002] With the increase in the proportion of high-sulfur crude oil processed by refineries, the corrosion of sulfur on equipment is also becoming more and more serious. Its corrosion products mostly appear in the form of ferrous sulfide, where ferrous sulfide refers to FeS, FeS 2 , Fe 2 S 3 A mixture of several chemicals. Ferrous sulfide oxidizes and spontaneously ignites rapidly at room temperature. When it spontaneously ignites, it does not generate flames, but only heats up to a hot state. When it reaches a certain temperature, it can cause other substances to burn and damage the equipment material. In recent years, incidents of ferrous sulfide spontaneous combustion and damage to ...
Claims
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IPC IPC(8): C11D1/72C11D3/37C11D3/20C11D3/60B08B3/08
Inventor 张建枚卜少华罗俊杰
Owner CHINA PETROLEUM & CHEM CORP