42results about How to "With corrosion inhibition" patented technology

The present invention belongs to the technical field of water treatment, relates to a multi-copolymer used for recycled water for industry and a preparation method and use thereof, particularly use as a scale and corrosion inhibitor, and especially as a low-phosphorus environmental-friendly scale and corrosion inhibitor. The multi-copolymer is obtained by copolymerization of a carboxyl-group-containing unsaturated organic monomer, an ester-group-containing unsaturated organic monomer and a sulfonic-acid group-containing unsaturated organic monomer, and the limiting viscosity number of the multi-copolymer is 0.035-0.055dL / g. The multi-copolymer has scale inhibition, dispersion, corrosion resistance, temperature resistance and other properties, can be used as a scale inhibition dispersant, especially as the low-phosphorus environmental-friendly scale and corrosion inhibitor, and can be used in circulating cooling water systems, oil field water injection systems, seawater desalination and other fields.

The invention discloses a low-cost multifunctional acid fluid system. The low-cost multifunctional acid fluid system is prepared from, by mass, 5-30% of hydrochloric acid, 0.001-2% of discharge aidingagent, 0.05-2% of anti-swelling agent, 0.05-2% of iron ion stabilizer, 0.05-2% of demulsifier, 0.05-5% of corrosion inhibitor, 0.001-2% of anti-acid slag agent, 0.01-0.5% of resistance reducing agentand the balance water, wherein hydrochloric acid is measured according to the mass of pure hydrogen chloride. The low-cost multifunctional acid fluid system is suitable for a carbonic acid rock storage layer, and on the basis of keeping the excellent performance of acid fluid, the cost is lowered by 15% or above; meanwhile the low-cost multifunctional acid fluid system has the advantages of beinglow in cost, high in corrosion rate to carbonate rock, good in fluid resistance reduction performance, good in anti-swelling effect, excellent in corrosion inhibition performance, good in anti-acid slag performance, high in demulsification rate, low in surface tension, capable of easily flowing back fluid, high in stability capacity of iron ions, good in compatibility and excellent in other comprehensive multifunctional performance.

The invention relates to an industrial secondary refrigerant. The industrial secondary refrigerant is composed of, by weight, 80 to 99% of glycol alkyl ether or propylene glycol alkyl ether compounds, 0.1 to 5% of a corrosion scale inhibitor and 0.9 to 10% function-adjusting liquid. According to the invention, the secondary refrigerant is added with the environment-friendly corrosion scale inhibitor which is harmless to the environment and human body, and the corrosion scale inhibitor can adsorb on metal surface and forms a physical adsorption protective film, so dissolved oxygen is blocked from diffusion to the metal surface; meanwhile, a compact passivation antirust film is generated through oxidation reduction reaction of the corrosion scale inhibitor with the metal surface, so metal oxidation is inhibited; moreover, the industrial secondary refrigerant provided by the invention also selects and uses the glycol alkyl ether or propylene glycol alkyl ether compounds with low viscosity, so effects of cold carrying and heat exchanging are guaranteed. The industrial secondary refrigerant in the invention is suitable for being used as the secondary refrigerant applied in industry under minus 80 to 200 DEG C, and an indirect heat transfer system in chemical industrial production and medicinal synthesis process. The secondary refrigerant is non-toxic and harmless, has excellent and safe heat transfer property and good fluidity at low temperature, does not precipitate and scale, and has the characteristics of environmental protection, cold carrying, heat transfer, corrosion inhibition, bacterial inhibition, low viscosity, corrosion resistance, etc.

This invention discloses a chemical method for removing stainless steel oxide layer. The method comprises: soaking 2205 bi-phase stainless steel belt in an acid-washing pool filled with acid-washing solution. The acid-washing solution comprises: sulfuric acid 230-260 g/L, sodium sulfite 60-100 g/L, sodium chloride 40-60 g/L, sodium nitrate 15-30 g/L, sodium borofluoride 50-80 g/L, thiourea 4-8 g/L, oxalic acid 60-100 g/L, and water as balance. The temperature of the acid-washing solution is 50-70 deg.C. The soaking time of 2205 bi-phase stainless steel belt in the acid-washing pool is 40-60 min. The acid-washing solution is stirrer by aeration during the acid washing process. The method is especially suitable for acid-washing 2205 bi-phase stainless steel belt.

The invention relates to a novel industrial cold-carrying heat transfer medium. The heat transfer medium is used as a secondary refrigerant or a heat transfer agent in an indirect heat transfer system in the industrial production field. The heat transfer medium mainly comprises 5 and 70 weight percent of C1-C3 organic acid salt, 0.1 to 9 weight percent of corrosion inhibitor, 0 to 1 weight percent of antisludging agent and 20 to 94.9 weight percent of water. The product of the heat transfer medium is nontoxic, nonvolatile and non-flammable, does not corrode metals, simultaneously has good fluidity at a low temperature, is a heat transfer medium with superior and safe heat transfer property, and has the characteristics of cold carrying, heat transfer, corrosion inhibition and bacteriostasis; and the heat transfer medium can be prepared into 70 weight percent of concentrated solution, can be diluted into different concentrations by water according to the technological temperature requirements, and is suitable for being used as the cold-carrying heat transfer medium in the industrial field at a temperature of between 50 DEG C below zero and 100 DEG C.

The invention discloses a sewage treating agent, and relates to the technical field of sewage treatment. The sewage treating agent is prepared from, by weight, 12 parts of active carbon, 15 parts of sepiolite powder, 35 parts of corn starch, 0.3 part of sodium hydroxide caustic soda flake, 4 parts of polyaspartic acid, 0.3 part of amino trimethylene phosphonic acid, 35 parts of polyaluminium chloride, 28 parts of chitosan, 5 parts of diatomite, 15 parts of polyaspartic acid, 4 parts of graphene nanolayer composite, 18 parts of crosslinking rectorite, 20 parts of zeolite, 18 parts of sulfate, 12 parts of polyacrylamide, and 35 parts of deionized water. The active carbon and zeolite are applied to physically absorb pollutants in the water, in particular to ultramicron molecule; other pollutants in the water are differentiated through other components; suspended solids are treated by sulfate and other flocculants; harmful substances are coated while chrome and other heavy metals are agglutinated by means of attraction and rejection among ultramicron particles; thus the harmful substances are not dissolved, and the fundamental sewage treatment is realized, and the harmless recycled water source is guaranteed.

The invention relates to biological organic fertilizer containing eucommia bark powder. Wheat straw, chicken manure and sheep manure are reutilized, Chinese herbal medicine is further added for fermentation, the utilization value of raw materials is increased, the biological organic fertilizer contains rich active organic ingredients and can activate soil, beneficial microorganisms are increased, and accordingly, the crop yield is remarkably increased. Alkaline substances and other active substances in traditional Chinese medicine can damage cell membranes and has a good inhibition function on bacteria as well as repellant and breeding inhibition functions on pests.

The invention discloses a water treatment agent and a preparation method of same. The water treatment agent includes, by weight, 20-30 parts of modified calcium lignosulfonate, 16-22 parts of straw, 4-7 parts of sodium alginate, 0.3-0.4 parts of sodium tartrate, 6-9 parts of sodium hypochlorite, 3-4 parts of polyepoxysuccinic acid, and 12-17 parts of bamboo vinegar. The preparation method of the water treatment agent includes the steps of: hydroxylation modification to calcium lignosulfonate, preparation of modified calcium lignosulfonate, and preparation of the water treatment agent. The water treatment agent has functions of inhibiting corrosion, flocculating foreign matters, inhibiting scaling and sterilizing water, is low in usage amount and use cost, can prevent scaling and depositionof iron, copper and silicon in a water circulation system, and maintains interior of the water circulation system to be clean and corrosion-free. The raw materials of the water treatment agent have wide sources and the preparation method is simple and is easy to carry out industrially. The water treatment agent has no environment-pollution after use and has great development potential.

The invention provides a multifunctional acid additive and a preparation method thereof. In terms of 1 liter, the multifunctional acid additive is prepared from the following raw materials: 2-5g/L of polyoxyethylene ether surfactants, 25-40g/L of potassium iodide or sodium iodide, 5-15g/L of ammonium citrate, 3-8g/L of citric acid, 20-50g/L of phosphoric acid, and the balance of water. The multifunctional acid additive is used when a steel material is cleaned by hydrochloric acid, has the characteristics of oil removal, corrosion inhibition, mist inhibition, hydrogen brittleness inhibition, high rust removal speed and rust resistance after cleaning, is diluted by a large multiple during hydrochloric acid cleaning, and is relatively low in cleaning cost and economically competitive.

The invention relates to a preparation process of a disease-resistant and pest-resistant fertilizer containing eucommia ulmoides powder. According to the preparation process, wheat straw, chicken manure and sheep manure are reused, and Chinese herbal medicines are added for fermentation, so that the values in use of raw materials are increased; the disease-resistant and pest-resistant fertilizer is rich in active organic ingredients, so that soil can be activated; the amount of beneficial microorganism is increased, so that the crop yield is increased effectively. Alkaline substances and other active substances in traditional Chinese medicines can damage cytomembranes, so that a good inhibiting effect on germs is achieved, and meanwhile, the disease-resistant and pest-resistant fertilizer has the effects of repelling and inhibiting breeding on pests.

The invention relates to a novel killing algicide. The invention is characterized in that the novel killing algicide comprises the following components in percentage by weight: alkyl guanidinium, alkyl diethanolamide, polyvinyl alcohol, fatty amine, fatty amine additive product, quaternary ammonium salt composite, limonene, geranialdehyde, emulsifier, alkali+silicone resin auxiliary and balance of deionized water. The killing algicide provided by the invention is a non-oxidized killing algicide and can block transmission of nutrient substance in membrane, thus the aim of killing cells is achieved. When concentration of the algicide is more than 100 thousands times of application concentration, the algicide is tested to be practically non-toxic, thus the algicide is safe when being applied in a factory; the algicide can be naturally degraded into water and carbon dioxide in ecological environment; the algicide is environmentally friendly, is convenient to use, does not burn or explode and is safe and reliable; and the algicide has wide application, low price and good economy.

The invention relates to a scale removal method. In the scale removal method, components of at least one type of scale remover are injected into an oil-gas well by a scale remover injector adopting a time-division asynchronous method, the scale remover injector at least comprises an input unit, an injection unit, and a control unit, the injection unit coupled with a wellhead comprises a main passage and at least one input pipe, the input pipe is used for injecting the components of the scale remover and provided with a chock valve which is used for controlling the jetting rate and jetting angle of the components according to the flow characteristic parameter of the components, and the control unit dynamically regulates the input pressure of at least one input pipeline connected between the input unit and the injection unit and the time-related jetting rate of the chock valve on the basis of a pressure level plan triggered by pressure information in the main passage and the flow characteristic parameter of the components. The invention can effectively remove calcium sulfate, and has the advantages of temperature resistance, oxygen resistance, strong concentrated base resistance and environment-friendliness.

The invention discloses an industrial pickling assistant and application thereof. The industrial pickling assistant is prepared from polyaspartic acid, polyoxyethylene ether surfactant, a complexing agent and water in a mixing manner; and the industrial pickling assistant and 18-25wt% of industrial sulfuric acid or hydrochloric acid are mixed to prepare into a cleaning solution according to the weight ratio of 1 to (100-150). The product disclosed by the invention utilizes the collaborative adsorption effect of polyaspartic acid and polyoxyethylene ether surfactant; a stable absorption layer can be stably formed at the surface of metallic matrix, so as to achieve the corrosion-inhibition and anti-rusting effects; the binding force of a rusting layer, a dirt layer and metallic matrix is reduced by utilizing permeating and wetting action of the surfactant; rapid dropping is facilitated; the metal complex ion is formed by the complex agent and Fe, Ca and Mg; free metal ions are reduced to achieve the target of facilitating dissolving of rusting of a steel product or material surface; the components are low in toxicity and biodegradable; and no adverse environmental consequences are generated after the industrial pickling assistant is used.

The invention relates to a water scale and corrosion inhibitor for a high temperature gas cooled reactor nuclear island plant and a dosing method. The water scale and corrosion inhibitor comprises the following components by weight: 5-10% of an amine type dendritic high polymer, 10-40% of phosphoric acid carboxylic acid butane, 3-20% of an imidazoline cyclic amine compound, 1-10% of a penetrant, and the balance of deionized water and an organic solvent, wherein the proportion of the components is 100% in total. A proper scale and corrosion inhibitor is added into the nuclear island plant water system to control the scaling rate of a heat exchanger of the system and the corrosion rate of materials such as carbon steel, 304 stainless steel and red copper in the system.