33results about How to "Efficient corrosion inhibition" patented technology

The invention discloses a preparation method of a solid corrosion-inhibition scale-inhibition bar used for an oil field, which relates to a production method of a chemical medicament used for the oil field. The preparation method comprises the following steps of: (1) mixing 30 to 40 percent of 2-phosphonobutane-1,2,4-tricarboxylic acid, 10 to 15 percent of polyethylene glycol, 10 to 15 percent ofsodium hexametaphosphate, 15 to 25 percent of Span-60 and 20 to 30 percent of stearic acid evenly, wherein the percent is the mass percent of the sum of each component occupying all the components; and (2) putting all the evenly mixed components into a bar type mold, pressing into a bar type by using a press machine and forming a finished product, wherein the pressure applied by the press machineis 15 to 20 tons. The method has the advantages of simple preparation process, even mixing of the components, trouble saving and labor saving, so that the method is suitable for mass and industrialized production and large-scale popularization and application.

The invention discloses a solid corrosion and scale inhibitor for an oil field, which relates to the technical field of chemical medicine reagents used for the oil field. The solid corrosion and scale inhibitor comprises the following ingredients: 2-phosphonic acid butane 1, 2, 4-tricarboxylic acid PBTCA, polyethyleneglycol, sodium hexametahposphate, span-60 and stearic acid, wherein each ingredient accounts for the mass percent of the sum of all the ingredients as follow: 30 percent to 40 percent of 2-phosphonic acid butane 1, 2, 4-tricarboxylic acid PBTCA, 10 percent to 15 percent of polyethyleneglycol, 10 percent to 15 percent of sodium hexametahposphate, 15 to 25 percent of span-60 and 20 percent to 30 percent of stearic acid. The invention is particularly suitable for well tubes of oil-gas wells with server corrosion and scale conditions, and has good corrosion and scale inhibition effects on underground pipe posts and equipment.

The invention relates to a high-temperature acidification corrosion inhibitor and a preparation method thereof. The high-temperature acidification corrosion inhibitor is prepared from the following components in parts by weight: 1-5 parts of N-alkylamino-2-perfluoroalkyl imidazoline quaternary ammonium salt, 30-50 parts of hydrocarbon imidazoline quaternary ammonium salt, 0-5 parts of sodium molybdate, 5-15 parts of thiocarbamide, 20-30 parts of ethanol and 10-20 parts of water. The preparation method comprises the following steps: adding the raw materials into a reaction kettle in turn, and stirring at 20-80 DEG C for 10-30 minutes to obtain the high-temperature acidification corrosion inhibitor. As the high-temperature acidification corrosion inhibitor contains the N-alkylamino-2-perfluoroalkyl imidazoline quaternary ammonium salt with special properties, compared with the conventional acidification corrosion inhibitor, the high-temperature acidification corrosion inhibitor provided by the invention has the advantages of low addition amount, good water solubility, strong temperature resistance, high corrosion inhibition rate and the like. When being used under acidification conditions at 150-200 DEG C, the high-temperature acidification corrosion inhibitor still has good corrosion inhibition effect and compatibility. The invention has the advantages of high corrosion-inhibition efficiency, low toxicity, environmental protection, high temperature resistance, wide application systems and the like, and can be used as the component of a high-temperature acidification liquid corrosion inhibitor.

The invention provides a plant-type composite high-efficiency corrosion inhibitor, which is made of the following raw materials in mass percentage: 12-66.0% of plants, 5.0-16.0% of sodium molybdate, 1.5-12% of sodium gluconate, and 3.5-25% of sodium tartrate %, zinc sulfate 0‑23% and potassium dihydrogen phosphate 4.0‑23.0%. The corrosion inhibitor of the invention has strong corrosion inhibition ability, and can exert corrosion inhibition effect on chlorine salt type deicing agent. After adding the corrosion inhibitor, it can reduce the corrosion of the chloride-salt deicing agent to metal and concrete and the damage to the vegetation. The corrosion inhibitor is mainly plant-based, non-toxic, and is a very efficient and environmentally friendly corrosion inhibitor. The invention also provides the preparation method and application of the plant-type composite high-efficiency corrosion inhibitor.

The invention relates to the field of methanol-to-low olefin production, and discloses a method for inhibiting the increase of pressure difference of methanol-to-low olefin alkali washing tower. The method comprises: injecting an inhibitor composition into an alkali washing tower of a methanol-to-light olefin separation unit, wherein the inhibitor composition contains an anti-polymerization agent, an antioxidant, an anti-corrosion agent, a surfactant, a cosolvent and a solvent, wherein , the anti-polymerization agent is an alcohol amine compound and / or a hydrazine compound, and the antioxidant is a mixture of diisopropanolamine, tert-butyl-p-hydroxyanisole and N,N-di-sec-butyl-p-phenylenediamine one or more of. The method can effectively suppress the increase of pressure difference in the alkali washing tower of methanol to light olefins.