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

The invention discloses washing liquid used in the semiconductor industry to wash plasma etching residues. The washing liquid contains citric acid/citrate buffer solution, fluorides, macromoledular corrosion inhibitor, anti-freeze agent and solvent. The washing liquid can effectively wash the plasma etching residues during the process of manufacturing a semiconductor, have low etching velocity on nonmetals and metal substrates such as Si, SiO2, tetraethoxy silane silicon dioxides (PETEOS), low-medium materials, Ti, Al, Cu and so on, is safe and harmless to the environment and the human body, and has good application prospect in the microelectronic field such as washing of semiconductor wafers and so on.

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 discloses an acidizing corrosion inhibitor based on a dimer indolizine derivative and a preparation method and application of the acidizing corrosion inhibitor. The acidizing corrosion inhibitor contains the dimer indolizine derivative; and the dimer indolizine derivative is mainly obtained by further intermolecular dimerization of active alpha-cetyl trimethyl ammonium chloride of heterocyclic alkali such as (substituted) quinolone and (substituted) pyridine under alkali acceleration. The acidizing corrosion inhibitor has good corrosion inhibition under the condition that a common corrosion inhibition synergist such as alkynol does not need to be compounded, the use amount is small, and when the acidizing corrosion inhibitor is used independently, requirements of first-levelto third-level standard in an acidizing corrosion inhibitor performance testing method and an evaluation index SY/T 5405-1996 can be met and are even higher.

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 of sodium 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 machine is 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 provides a multifunctional sulfur elimination agent as well as a preparation method and application thereof, and belongs to the technical field of oil gas field development. The invention provides the multifunctional sulfur elimination agent, which is prepared from the following ingredients in parts by weight: 50 to 60 parts of triazine derivatives, 25 to 35 parts of sterilization corrosion inhibitors and 5 to 15 parts of mutual solvents, wherein the sterilization corrosion inhibitors are one or more of quaternary ammonium salt sterilization corrosion inhibitors, oxazoline sterilization corrosion inhibitors and pyridine sterilization corrosion inhibitors. The triazine derivatives are used as sulfur elimination agents to be matched with the sterilization corrosion inhibitors;under the effects of the mutual solvents, by limiting the dosage of various ingredients, the multifunctional sulfur elimination agent with higher sterilization, corrosion inhibition capability and sulfur elimination capability is obtained through compounding. Through the embodiment, the corrosion inhibition rate of the multifunctional sulfur elimination agent provided by the invention is 86 to 95percent, the sterilization rate is as high as 99 percent, and the sulfur elimination rate can reach 98 percent.

The invention discloses a steel corrosion inhibitor and a preparation method thereof, and belongs to the technical field of metal corrosion and protection. The corrosion inhibitor is prepared in the step of compounding 1,1-di(benzothiazole-2-group)-2-(N-benzylcarbazole-2-group)ethylene as a core corrosion inhibiting component with an organic solvent, surfactant, dispersant and water. The corrosioninhibitor has obvious anti-corrosion effects on various kinds of steel in all conditions of acid, alkali and salt. The steel corrosion inhibitor has the advantages of simple formula, simple and convenient preparation process, safety in operation, low toxicity, high efficiency and environmental friendliness.

The invention provides a plant type composite efficient corrosion inhibitor. The plant type composite efficient corrosion inhibitor is prepared from the following raw materials in percentage by mass: 12 to 66.0 percent of plants, 5.0 to 16.0 percent of sodium molybdate, 1.5 to 12 percent of sodium gluconate, 3.5 to 25 percent of sodium tartrate, 0 to 23 percent of zinc sulfate and 4.0 to 23.0 percent of monopotassium phosphate. The corrosion inhibitor disclosed by the invention is high in corrosion inhibition capability and can achieve a corrosion inhibition effect on a chlorine salt type snow-melting agent. After the corrosion inhibitor is added, the corrosion of the chlorine salt type snow-melting agent to metal and concrete and the harm to vegetation can be reduced. The corrosion inhibitor is mainly prepared from plants, is non-toxic, and is a very efficient and environment-friendly corrosion inhibitor. The invention further provides a preparation method and application of the plant type composite efficient corrosion inhibitor.

The invention discloses a corrosion inhibitor for a closed soft water circulating cooling water system and an application. Anti-corrosion protection is carried out on thermal equipment, so that the service life of system equipment in a closed soft water circulating cooling water environment is effectively prolonged. The corrosion inhibitor has the characteristics of being efficient, phosphorus-free and environment-friendly. The corrosion inhibitor is characterized by comprising a steel corrosion inhibitor and a copper corrosion inhibitor, wherein the steel corrosion inhibitor comprises triethanolamine borate, ascorbic acid and urotropine; and the copper corrosion inhibitor comprises benzotriazole.

The invention discloses an oil and gas field gathering and transportation pipeline corrosion inhibitor capable of resisting the corrosion of high-calcium produced water. The gathering and transportation pipeline corrosion inhibitor comprises the following components in percentage by mass: 70 to 95 percent of macromolecular imidazoline-based ionic liquid and 5 to 30 percent of micromolecular imidazoline-based ionic liquid. The corrosion inhibitor disclosed by the invention is an environment-friendly corrosion inhibitor for inhibiting the corrosion of the high-calcium produced water in an oil and gas field gathering and transportation system, and has the characteristics of better corrosion inhibition effect, no solvent, environment friendliness, good water solubility and small dosage.

The invention provides a high-efficient detergent for an automotive windscreen glass surface, and relates to the field of glass cleaning. The detergent, is prepared from the following raw materials: sodium dodecyl benzene sulfonate, a surface active agent, essence, palm wax, sodium molybdate, boric acid, triethanolamine, naphthenic oil, sodium silicate, sodium citrate, span, phenol, kieselguhr, butyl stearate, methylthionine chloride, monopotassium phosphate, a plant extracting solution, sodium citrate, ethyl alcohol, acetone, dipropylene glycol monomethyl ether, a defoaming agent, an antifreeze agent and an appropriate amount of deionized water. The detergent cannot be frozen to damage automobile facilities when the outside temperature is lower than minus 20 degrees, not only can be usedfor effectively clearing stains on the glass surface, but also can be beneficial to improving the glossiness of the glass surface, has the characteristic of high cleaning efficiency, and also has theeffects on preventing freezing and increasing the degree of finish.

The invention relates to the field of preparation of low-carbon alkene from methanol, and discloses a method for inhibiting pressure difference rise of an alkaline washing tower for preparing low-carbon alkene from methanol. The method comprises the steps that an inhibitor composition is injected into the alkaline washing tower of a methanol-to-light olefin separation unit, the inhibitor composition contains an anti-polymerization agent, an antioxidant, a corrosion inhibitor, a surfactant, a cosolvent and a solvent, the anti-polymerization agent is an alcohol amine compound and/or a hydrazinecompound, and the antioxidant is one or more of diisopropanolamine, tert-butyl p-hydroxy anisd and N, N-di-sec-butyl p-phenylenediamine. The method can effectively inhibit the increase of the pressuredifference of the alkaline washing tower for preparing low-carbon alkene from methanol.

The invention relates to a special cooling liquid for internal combustion locomotives, which comprises the following formula components by weight on the basis of per liter of water: 1200-1800mg/L of sodium nitrite, 1000-2000mg/L of borax, 50-150mg/L of benzotriazole, 300-600mg/L of group VI metal-containing acid or salt thereof, 100-600mg/L of organic carboxylic acid or salt thereof containing more than 6 carbon atoms, and 500-1000g/L of a benzimidazole amine compound. The cooling liquid also comprises an alkaline pH regulator for regulating the pH value range of the cooling liquid to be 9.0-10.5. The cooling liquid disclosed by the invention has an efficient corrosion inhibition effect on various metals in a cooling water system of an internal combustion locomotive, can replace an imported NALCOOL 2000 corrosion inhibitor and has a better effect.

A pickling solid corrosion inhibitor for power plant boilers, belonging to the field of corrosion inhibitors, comprising 12-15 parts of urotropine, 6-8 parts of ammonium thiocyanate, 0.6-1 part of promethazine, and 0.1-0.2 parts of benzotriazole part, 2-5 parts of tin protochloride, 2-5 parts of sodium thiosulfate, 1-3 parts of thiourea, the solid corrosion inhibitor of the present invention except most acids except nitric acid, to the absolute majority of acids except zinc and aluminum Most metals have good corrosion inhibition efficiency, and the present invention fully considers various corrosion and safety hazards such as H+ ion corrosion, H atom corrosion, Fe3+ corrosion, Cu2+ corrosion in the acidic process, and has more comprehensive corrosion inhibition points and higher corrosion inhibition efficiency. Higher, wider range of use and other outstanding advantages.