53 results about "Ammonium nitrite" patented technology

The invention relates to a gas self-production system used for plug removal and energy increase of an oil-water well and an application method thereof. The gas self-production system comprises, by weight, 3-10% of urea, 5-25% of a nitrite, 5-25% of an activator and 40-85% of water. The nitrite is one of sodium nitrite, ammonium nitrite and potassium nitrite. The activator is one of methyl formate, ammonium amidosulfonate, ammonium-monochloracetat, hexamethylenetetramine and formaldehyde. When the gas self-production system is used, the above materials are mixed at ambient temperature under ambient pressure, and injected into oil-bearing strata having a temperature higher than 50 DEG C, so as to remove plug, increase energy and increase enhance rate. The gas self-production system can be applied for plug removal and energy increasing of low-pressure low-energy wells in an oil field scattered reserve unit.

High efficiency viscosity-reducing agent which is used on THE thermal oil extraction technology, which is formed by the following raw materials with percentage by weight, firstly phenyl benzene, fused ring aromatic hydrocarbon or fused ring aromatic hydrocarbon derivative which does not contain chlorine element and sulfur element, secondly liquid petroleum product whose aromatic hydrocarbons content is no more than 5%, petroleum resin which is liquid state under the constant temperature or hydrocarbons natural aggregation which is particle state under the constant temperature, thirdly water-soluble anionic surface active agent, water-soluble non-ionic surface active agent, oil solubility anionic surface active agent or oil solubility non-ionic surface active agent, fourthly fusel oil, fifthly alcohol ether, sixthly oil solubility or water-soluble polymer which respectively has nonpolar portion which has eutectic crystal with ceresin wax molecular and polar portion which can make wax crystal system twisty on main chain and or branch chain, seventhly hyperoxide, eighthly carbamide, ammonium carbonate, ammonium acid carbonate or ammonium nitrite and ninthly ketone. The high efficiency viscosity-reducing agent has strong suitability, strong viscosity-reducing ability, safety and reliability, can largely reduce extract cost and increase the yield of oil pump, and increases the final recovery efficiency of oil reservoir.

The production process of smoke-eliminating, dust removing and energy saving combustion improver includes a) crushing, grinding and mixing potassium chloride, magnesium chloride and Fe2O3, setting the mixture inside a reactor and mixing with water for reaction; b) crushing ammonium nitrite and setting inside one other reactor and mixing with water for reaction the product of the fore step; c) mixing crushed coarse whiting, nitric acid and water to produce calcium nitrate; mixing calcium nitrate with the product of step b) for reaction, stoving, adding RE, quartz, barite and carbonate for reaction, and adding kaolin to reaction to obtain the combustion improver. The combustion improver is used in coal combustion to perform the functions of catalysis, releasing heat, fixing sulfur and lowering environmental pollution.

The invention discloses a preparation method of an environment-friendly condom. The preparation method comprises the steps of blending natural latex and proper blending components for 4h, then conducting prevulcanization for 18-24h, staying for aging to obtain blended latex for standby; gumming a condom die with a proper shape in the blended latex for two or three times and drying to form a latex film; and filtering, crimping, drying, swelling, removing die, soaking and washing, and dewatering the latex film, and then conducting additional vulcanization on the latex film to form the condom. According to the method disclosed by the invention, the selected raw materials can be used for producing a nipple for a baby, and particularly, a selected accelerant and a selected anti-aging agent are environment-friendly. As known to all, the nipple for the baby has an extremely strict requirement on residual ammonium nitrite, and the adaptability of a human body to the nipple for the baby is indisputable. The condom prepared by the method can simultaneously achieve the needed tensile strength and elongation and is safe and comfortable.

A nucleophilic NO donor is prepared from chitosan through modifying by amino acid to increase its nucleophilic sites (NH groups), and reacting on NO. It has different NO releasing speeds and half-life, low cytotoxicity and generation of cancergenic ammonium nitrite.

The invention discloses a purification technology for a side product of flue gas ammonia-desulphurization, by the purification technology, the problem of influence on product quality caused by that the dust cannot be removed in the existing purification technology is solved. The technical scheme comprises the following steps of: 1, solid liquid separation: heating an absorption solution to be 75 DEG C to 90 DEG C, standing, settling and separating, so as to obtain an oil phase of the uppermost layer, a water phase of the intermediate layer, and a solid-liquid mixed phase of the lower layer; 2, film filter oxidization: introducing the water phase in a film filter oxidization device, bubbling while filtering, introducing hot air, keeping the hot air at the temperature of 75 DEG C to 90 DEG C, carrying out oxidization of ammonium sulfate and ammonium nitrite, and film filter treatment of dust, so as to obtain a gas phase, a filtrate and a solid-liquid mixed phase; 3, concentrating cooling: introducing bubbles in the filtrate in room-temperature air, or spraying the filtrate to contact room-temperature air, concentrating and cooling to 55 DEG C to 60 DEG C, so as to obtain a gas phase and a cooled solution, and introducing the cooled solution in an ammonium sulfate crystallizing system to carry out the ammonium sulfate crystallization treatment. The technology disclosed by the invention is simple in process, low in operation cost, is doubled as oxidization and dust removing, and high-quality ammonium sulfate products can be obtained.

A method of monitoring operation of an exhaust treatment system of a diesel engine includes injecting a dosing agent into an exhaust and monitoring the operating conditions of an engine during normal driving conditions. A control module monitors inlet and outlet temperatures of a catalyst and compares the inlet temperature to the outlet temperature. The control module further evaluates the exhaust treatment system based on the inlet temperature, the outlet temperature and a predetermined temperature threshold.

Method for controlling and detecting ammonium nitrate and / or ammonium nitrite poisoning within selective catalytic reduction (SCR) devices and systems incorporating the same are provided. Methods can include detecting a SCR inlet exhaust gas NO2:NOx ratio above a poisoning NOx flux threshold, detecting a SCR temperature below a poisoning temperature threshold, and determining SCR catalyst poisoning. Methods can further include performing a SCR catalyst cleaning strategy, wherein the SCR cleaning strategy comprises heating the SCR catalyst composition to a temperature above the poisoning temperature threshold. Cleaning strategies can including utilizing a heater, implementing a post-injection, after-injection, and / or auxiliary injection engine strategy wherein the engine is configured to supply exhaust gas to the SCR. Methods can further include arresting reductant dosing, identifying an opportunistic regeneration opportunity, and / or inhibiting performance of an appurtenant oxidation catalyst subsequent to determining SCR catalyst poisoning. The SCR catalyst composition can comprise iron and / or copper.

The invention provides a method for ammonium sulfite or ammonium nitrite oxidation by ozone. The method is characterized in that during a wet fire coal or fuel oil flue gas desulphurization and denitration process, SO2 or NOx in the flue gas is adsorbed by an alkaline solution so as to generate sulfite or nitrite collected in a reaction tank, and ozone generated by an ozone generator is injected into an ammonium sulfite or ammonium nitrite solution by a pipeline and an aeration head, also ammonium sulfite or ammonium nitrite in the solution is oxidized by ozone into ammonium sulfate or ammonium nitrate that can be used as fertilizer production raw materials. The method provided in the invention has the characteristics of rapid oxidation rate and high oxidation efficiency of sulfite or nitrite, high gas utilization efficiency and energy saving.

A wet ammonium flue gas cleaning process for desulfurizing and denitrifying and a system thereof are disclosed. The process oxidates NO in the flue gas to be NO2, makes SO2 and NO2 in the flue gas react with ammonium to product ammonium sulfite, ammonium nitrate and ammonium nitrite, then oxidates ammonium sulfite and ammonium nitrite therein to product the byproduct that is ammiaonia sulfate and ammonium nitrate, and lastly gets the clear flue gas after demisting to the desulfurizing and denitrifying flue gas. The system comprises a dust pre-collector, a hydrogen peroxide or ozone sprayer, and a desulfurizing and denitrifying tower, which are connected in turns, wherein ammonia replenishment system and an air feeding device are mounted at the bottom of the desulfurizing and denitrifying tower, sprinkling layer which can cycle sprinkle is mounted at the middle, and a demister is mounted at the upper. The invention has a simple process, a simplified system, a low investment and operation cost. The invention not only has a high efficiency in desulfurizing and denitrifying, but also a high utilance of desulfurizing and denitrifying absorbent, and byproduct of desulfurization and denitration can be utilized as chemical fertilizer of ammiaonia sulfate and ammonium nitrate.

The invention discloses a synthetic method of phenylhydrazine. The synthetic method comprises the following steps: adding dilute sulfuric acid into aniline, dropwise adding ammonium nitrite at 0-5 DEG C, and then performing thermal reaction for 4-6 minutes; then cooling to a temperature between -5 and -10 DEG C, adding a solid reducing agent, and stirring violently; when the temperature of the reaction system naturally rises to be more than 40 DEG C, adding dilute sulfuric acid to adjust the pH value to be 2-4, and heating to 70-100 DEG C to react for 4-6 hours; and separating the obtained reaction product to obtain phenylhydrazine. According to the synthetic process of phenylhydrazine, disclosed by the invention, aniline is used as a raw material, dilute sulfuric acid is used as salt forming and acidifying reagents, ammonium nitrite is used as a diazotization reagent, ammonium sulfite and / or ammonium hydrogen sulfite is used as the reducing agent, ammonia gas is used for neutralizing a reaction solution, phenylhydrazine is finally obtained by virtue of extraction and distillation, and a byproduct salt is single ammonium sulfate.

The invention relates to the technical field of domestic garbage recycling, in particular to a novel environment-friendly domestic garbage recycled coal production method. The method can fully treat domestic garbage, so that environment pollution caused by the domestic garbage can be reduced, moreover, production is simple, and the cost is low. The method includes the following steps that: according to proportion, the domestic garbage, bleaching powder, sodium hydroxide, sodium permanganate, calcium carbonate and urea are fed into a grinder and ground, and the ground mixed particle-like garbage is kept still for reaction under normal temperature; under normal temperature, anhydrous sodium sulphate is dissolved in clean water to the saturation state, and sodium chloride, graphite powder, ammonium nitrite, zinc oxide and sodium permanganate are added to carry out normal-temperature reaction; a moderate amount of clean water is added in the sodium permanganate, used oil, olefin, carbon powder and sodium chloride in an iron kettle, the mixture is heated to 75 DEG C and dissolved, and various products are mixed and shaped, so that a novel domestic garbage recycled coal product is produced.

A method for removing N-nitroso compounds from pendimethalin is disclosed. The method includes adding hydrochloric acid, ammonium chloride and an auxiliary catalyst into a dichloroethane solution of the pendimethalin containing N-nitroso compounds; heating the mixture to 78-82 DEG C; reacting and stirring the mixture for 6-10 h until the N-nitroso compound content of the reaction system is lower than 0.05%; and subjecting the reaction solution to aftertreatment, and concentration to remove a solvent to obtain a pendimethalin product. According to the method, the ammonium chloride is adopted asan additive for nitroso compound removal under the existence of concentrated hydrochloric acid, and the ammonium chloride reacts with nitrosyl chloride generated during nitroso compound removal to form ammonium nitrite which is unstable and liable to decompose into nitrogen and water, and hydrogen chloride which is dissolved into water to form hydrochloric acid, thus avoiding introduction of organic impurities and avoiding generation of salt-containing waste water.

The invention provides a method for injecting a surface discharge active material to oxidized ammonium sulfite or ammonium nitrite. The method for injecting the surface discharge active material to oxidized ammonium sulfite or ammonium nitrite is characterized in that: in a wet desulphurization and denitration process of fire coal or fuel oil, sulfite or nitrite generated by absorbing SO2 or NOx in the gas through aqueous alkali is collected into a reaction tank, a gaseous-phase surface discharge system is placed in the reaction tank of ammonium sulfite or ammonium nitrite, oxygen-contained gas enters one end (called inlet) of the surface discharge system, is changed into active gas containing active materials, such as ozone, atomic oxygen, etc., and then injected to a solution in the reaction tank by a sprayer on the other end (called outlet) of the surface discharge system, the ammonium sulfite or ammonium nitrite in the solution is oxidized to ammonium sulfate or ammonium nitrate by the active materials as raw materials of chemical fertilizers. The method has the characteristics of high oxidation rate and efficiency of the ammonium sulfite or ammonium nitrite, high utilization efficiency of gas and energy saving.

The invention relates to a carbon dioxide absorbent used for capturing after combustion. The carbon dioxide absorbent is characterized by being composed of a main absorbent polyethyleneimine (PEI), auxiliary absorbents TEPA, MEA, MDEA, DEA and PZ, an antioxidant sodium sulfite, potassium sulfite or ammonium sulfite, a corrosion inhibitor sodium molybdate, sodium chromate, sodium vanadate or ammonium molybdate, and water. The molecular weight of polyethyleneimine (PEI) is 300-500; polyethyleneimine has a branch shape, and the molecule comprises three amino groups including primary amine, secondary amine and tertiary amine; and compared with other types of organic amines, polyethyleneimine has higher amine density. A compound absorption solution has relatively high carbon dioxide absorption amount, relatively rapid absorption speed, low regeneration energy consumption and high stability, so that the absorbent has a very great application prospect in the aspect of capturing carbon dioxide after combustion.

The invention discloses a preparation method of nitrosohemoglobin pigment with thermal stability, belonging to the technical field of preparation of hemoglobin pigment. The preparation method of nitrosohemoglobin pigment with thermal stability comprises the following steps: mixing sodium citrate and pig blood; filtering the mixture; carrying out ice bath processing to collect hemocytes; carrying out oscillating reaction on the hemocytes and deionized water to obtain hemocyte broken mixed liquid; mixing the hemocyte broken mixed liquid with D-sodium isoascorbate, ammonium nitrite and glycerol to prepare hemoglobin mixed liquid; heating the hemoglobin mixed liquid and specially-made hydrolytic bagasse gel liquid in a water bath; carrying out centrifugation, and then collecting supernatant liquid; and carrying out vacuum freeze drying so as to obtain the nitrosohemoglobin pigment with thermal stability. Embodiments prove that the preparation method has the advantages that the processes are simple and convenient, and the reaction is mild; animal blood by-products are effectively utilized, so that wastes are changed into valuables and environmental pollution is reduced; and meanwhile, the prepared nitrosohemoglobin pigment has stable color and luster and is not easy to fade, and the thermal stability and dispersibility of the nitrosohemoglobin pigment are obviously improved. The preparation method is suitable for industrial production.

The invention relates to a foaming agent and belongs to the technical field of chemical paint. The foaming agent is characterized by being prepared from the following raw materials in parts by weight: 1 to 3 parts of ultrafine aluminum powder, 6 to 10 parts of petroleum ether, 2 to 6 parts of dichlorodifluoromethane, 0.5 to 1 part of sodium hydrogen carbonate, 1 to 2 parts of ammonium carbonate, 0.5 to 1 part of ammonium nitrite, 2 to 4 parts of sodium silicate and 2 to 5 parts of magnesium hydroxide. The foaming agent provided by the invention has no corrosion to cement and metal and short degradation time, is easy to recycle and has high fire resistance; pollution to the environment is not generated; the foaming agent can be stored for long time and does not easily go bad; the stability of foam is moderate and the foaming agent is convenient to transport.

The invention discloses a domestic garbage environmentally friendly renewable fuel and a manufacturing method thereof, and belongs to the technical field of renewable energy. The domestic garbage environmentally friendly renewable fuel is prepared from the following raw materials according to the percentage of the total weight of the raw materials: 93.7-96.5% of domestic garbage, 0.1-0.3% of sodium dichloroisocyanurate, 0.2-0.4% of urea, 0.1-0.2% of sodium bicarbonate, 0.1-0.3% of glycerin, 0.2-0.3% of trisodium phosphate, 0.2-0.4% of sugar, 0.4-0.6% of sodium permanganate, 0.2-0.4% of a carbon powder, 0.2-0.4% of sodium chloride, 0.2-0.3% of a graphite powder, 0.1-0.3% of ammonium nitrite, 0.1-0.3% of a manganese powder, 0.1-0.3% of zinc oxide, 0.1-0.3% of anhydrous sodium sulphate and 1.2-1.5% of water. The renewable fuel has the advantages of high heat value, low pollution, good combustion performance and easy storage.

A fresh keeping ice bag comprises an outer plastic bag, an inner plastic bag and a coolant in a packaging bag; the ammonium nitrite and crystallized sodium carbonate are contained in the plastic bag and are separated by an easy-to-detach partition device outside the bag. During use, the partition device is detached, and the temperature can be reduced to about 0 DEG C within 1 minute after the two substances in the bag are fully mixed. The ice bag is convenient to cool, fast in speed, convenient to use and portable. The fresh keeping ice bag is characterized in that the packaging bag is provided with a hopper-like water injection port capable of injecting a solution into the packaging bag. The fresh keeping ice bag is convenient to use and preserve, is portable, non-toxic, tasteless and odourless, does not pollute a fresh keeping object and can be easily separated from the fresh keeping object, and the fresh keeping capacity of the coolant is high and is more than two times that of the coolant of the existing fresh keeping ice bag.

The invention discloses seawater-resistant cement, and belongs to the technical field of building materials. The cement comprises the following constituents in parts by weight: 10-15 parts of cement clinker, 2-6 parts of coal ash, 2-4 parts of zinc oxide, 10-20 parts of magnesium oxide, 5-8 parts of aluminum oxide, 5-8 parts of volcanic rock fibers, 10-15 parts of silica and 0.8-1.7 parts of ammonium nitrite. The cement is good in weather resistance, adhesion and oxidation resistance, and can effectively resist chemical corrosion and microbiological corrosion in seawater, as well as seawater erosion and temperature difference caused by climate change.

The invention provides a method and a system for recovering ammonia from a potassium nitrate technology byproduct ammonium chloride, and especially relates to a method for recycling ammonia gas recovered from the byproduct ammonium chloride of a technology for preparing potassium nitrate through a double decomposition process of nitric acid, ammonia and potassium chloride. The method comprises thefollowing steps: wet ammonium chloride or an ammonium chloride solution generated after centrifuging in the technology for preparing potassium nitrate through the double decomposition process is pretreated to prepare an ammonium chloride solution with a certain concentration; (2) the pretreated ammonium chloride solution goes through a heat exchange system, then is sent into an ammonia distillingsystem, and reacts with lime milk and steam; (3) an ammonia-containing gas generated in the ammonia distilling system is cooed by the heat exchange system, is dehydrated, and then is sent into a compressor; and (4) compressed ammonia gas in the compressor is sent into an ammonium nitrate workshop section, and reacts with nitric acid to prepare ammonium nitrate, and the generated ammonium nitrateis used as a raw material in the technology for preparing potassium nitrate through the double decomposition process. The method and the system have the characteristics of continuousness and stabilityin running, simple flow, reduction of the byproduct ammonium chloride, and reduction of the consumption of ammonia.

An environment-friendly cement, which is made of the following raw materials in parts by weight: 4-6 parts of aluminum silicate, 2-3 parts of asbestos powder, 1.2-2.4 parts of sulfomethyl phenolic resin, 8-14 parts of magnesium oxide, volcanic rock 4-7 parts of fiber, 1.2-2.3 parts of ammonium nitrite, 12-22 parts of quartz sand, 5-10 parts of dispersible rubber powder, 4-7 parts of polyethylene rubber powder, 7-11 parts of fluorine gypsum, 2-4 parts of slag rosin with a particle size of 25 μm to 40 μm, 3-4 parts of alum, 3-6 parts of white cement, 2-7 parts of iron ore tailings, and 6-14 parts of fly ash. The beneficial effects of the invention are: the environment-friendly cement of the invention can effectively prevent dusting, has certain environmental protection performance, excellent waterproof and pressure resistance, strong adhesion, and improved output and quality.

The invention discloses a foaming agent. The foaming agent is prepared from the following raw materials in parts by weight: 2 to 5 parts of aluminum powder, 1 to 5 parts of sodium lauryl sulfate, 5 to10 parts of water glass, 3 to 5 parts of silicon carbide, 1 to 3 parts of carbonate, 0.1 to 0.5 part of ammonium nitrite, 0.1 to 0.3 part of ammonium carbonate, 10 to 15 parts of petroleum ether, and1 to 3 parts of dichlorodifluoromethane. The foaming agent proposed by the invention has strong foaming capacity, large foam quantity per unit volume, and stable foam, has good compatibility with a use media, is non-corrosive to the cement and metal, has short degradation time, is easy to recycle, has strong flame retardant, has no pollution to the environment, and is easy to transport.

The invention provides rapid permeable compressive concrete and a preparation method thereof. The permeable concrete is prepared into two layers, more stones with small particle sizes are contained in the permeable concrete on the surface layer, more stones with large particle sizes are contained in the permeable concrete on the bottom layer, and rainwater can be filtered and permeated through the special structure. A binder is added to increase the cohesiveness between the framework to improve the compressive strength, meanwhile, the concrete has the effect of a water reducing agent, and sodium nitrate, ammonium nitrite, ethylene glycol and other components have the effect of reducing the freezing point, so that the anti-freezing capacity of the concrete is improved. Modified steel fibers are added to support the concrete, so that the compressive strength of the concrete is improved. A water repellent agent is added into the permeable concrete, so that the contact time and area with water are reduced, water is quickly drained, water in the concrete is reduced, and the compressive strength and water permeability of the concrete are protected.

The invention particularly relates to a preparation technology of a special odor removal refreshing agent for kitchen and bath, and belongs to the technical field of refreshing agents. The refreshingagent is prepared from the following ingredients of jasmine flowers, pawpaws, pineapples, astragalus membranaceus, mature ginger, flowers of syringa oblata lindl, flowers of wisteria sinensis sweet, green heart orange young fruits, herba portulacae and the like. The refreshing agent takes combined plant ingredients as raw materials, is healthy and non-poisonous, green and environmentally friendly.Jasmin oil can be extracted from jasmine flowers, and the main ingredients in the jasmin oil are benzyl alcohol and esters which have the effects of inflammation diminishing and detoxification. Flowers of syringa oblata linda contain eugenol which has very strong sterilizing power. Aromatic oil can be extracted from flowers of wisteria sinensis sweet, contains cyanide, can prevent alcohol from rot and deterioration, and has the efficacy of killing insects and removing odors. The green heart orange young fruits, alias orange young fruits, belongs to a small leaf early sprouting species, is suitable for making green tea particularly the variety of longjing tea, and tea polyphenol contained in green heart orange young fruits has very strong oxidation resistance and physiological activity, isa scavenging agent for biological free radicals, and can block forming of a variety of cancerogenic substances such as ammonium nitrite.

The invention relates to the technical field of food pickling, in particular to a pickling method of nutritional flavoring garlic. The pickling method of the nutritional flavoring garlic is simple, and low in cost, a garlic pickled product prepared by the method is safe, healthy, rich in nutrition and convenient to eat, contains no harmful additives, avoids the generation of ammonium nitrite, is rich in taste, and has pure natural fermentation fragrance; the maca enzyme and the fermenting agent contain various active protein small peptides in the fermentation process, and the maca enzyme can also alleviate the physical fatigue and improve the immunity; moreover, the fermenting agent can promote the digestion while suppressing the generation of nitrosamine compounds.