1154 results about "Nitrite salt" patented technology

Disclosed is an emulsifying metal-cutting-fluid composition comprising base oil or oily agent, mixed alcohol-amine, anionic surfactant, nonionic surfactant, antirust agent, copper alloy corrosion inhibitor, preservative and the like. The invention has a strong general usability, suitable for metal processing, particularly aluminum alloy metal processing with advantages of excellent lubricity, corrosion resistance, a low cost and being free of toxic or harmful substances such as nitrites and phenols, so as to keep the environment and operators away from harmfulness.

A method and system for generating and delivering nitric oxide directly to a patient. A reaction chamber is provided that is located at or in close proximity to the patient and reactants within the reaction chamber react together to produce a predetermined amount of nitric oxide. The reaction is controlled by metering at least one of the reactants into the reaction chamber to generate a predetermined quantity of nitric oxide as required by the patient. The reactants can include a nitrite salt, such as sodium nitrite, and a reductant such as ascorbic acid, maleic acid or a mixture thereof. By generating and delivering the nitric oxide directly to the patient in close proximity thereto, the formation of NO₂ is minimized. One or both of the reactants may be in liquid form.

The invention discloses a device and a method for denitrification of single stage autotroph in low-cellulose nitrate (CN) high-ammonia nitrogen waste water. The device comprises a raw water tank, a water inlet pump, a reactor, a secondary sedimentation tank and a sludge reflux pump, wherein overcurrent holes are arranged in the water flow direction of the reactor in an up-and-down alternative form and connected with various grid chambers, an anoxic zone grid chamber is arranged at the front end of the reactor, and an aerobic zone grid chamber is arranged at the back end of the reactor; the anoxic zone grid chamber is provided with a stirrer and an agitator blade; the aerobic zone grid chamber is provided with the stirrer, the agitator blade, an aeration riser pipe and an intermediate perforated clapboard; and the aeration riser pipe is internally provided with an aeration head, and sponge filling material is filled below the intermediate perforated clapboard, wherein filling ratio is 30-50%. In the method, shortcut nitrification is achieved above the aerobic zone through low dissolved oxygen (DO is 0.5 <-1>mg/L) and free ammonia (FA) inhibition so that ammonia nitrogen is converted to nitrite nitrogen; and anoxicammoxidation biomembrane acts on the lower part of the aerobic zone, the nitrite nitrogen and ammonia nitrogen are converted to nitrogen, thereby achieving denitrification of autotroph. The method has the advantages of low oxygen consumption, less sludge output and no extra carbon source.

The invention relates to a bacteria strain for short-cut denitrification and an application thereof. The short-cut denitrification bacteria strain is arthrobacter creatinolyticus FDN-1 and is preserved in Ordinary Microorganism Center of China Committee for Culture Collection of Microorganisms on March 11, 2010, and the preservation number is CGMCC No. 3657. The bacteria strain can directly adopt nitrite nitrogen as a substrate to complete the short-cut denitrification process. When the arthrobacter creatinolyticus FDN-1 is used for processing ammonia-contained waste water, the technique is simple, high denitrification activity can be still obtained under the condition that low-concentration organic carbon source exists, and at the same time the high-concentration organic carbon source can be withstood. When the bacteria strain is in use, the system is rapid to start, and a vast application prospect can be realized in the denitrification treatment process of different types of waste water.

The present invention discloses a water-based cutting fluid for vermicular cast iron processing, and a dilution solution thereof. The water based cutting fluid comprises 3-10% of an anti-rust additive, 4-10% of fatty acid amide, 2-3% of organic amine, 3-10% of long-chain fatty acid, 2-5% of fatty alcohol polyoxyethylene ether, 5-8% of petroleum sodium sulfonate, 1-5% of a coupling agent, 10-15% of an extreme pressure additive, 15-20% of a synthetic ester, 1-2% of a sterilization agent, 0.5-1.0% of an anti-forming agent, and 32-45% of water, wherein the anti-rust additive is a boric acid anti-rust additive and dicarboxylic acid, and the coupling agent is a fatty alcohol and/or aliphatic ether. The water-based cutting fluid of the present invention has characteristics of good lubrication performance, good cooling performance, good anti-rust property, no chlorine, diamine, nitrite and other nitro compounds, no environmental pollution, no irritating odor, easy cutting, easy powder settlement, and effective cutter service life prolonging.

The invention relates to a Kocuria palustris strain and applications thereof. The strain is Kocuria palustris FSDN-A, and is preserved in the China General Microbiological Culture Collection Center on July 14, 2011, wherein a preservation number is CGMCCNO.5061. According to the present invention, the strain can adopt nitrite nitrogen or nitrate nitrogen as a substrate to complete a denitrification process; when the Kocuria palustris FSDN-A is adopted to treat ammonia-containing wastewater, characteristics of simple process, high denitrogenation activity, and high concentration organic carbon source tolerance are provided; after the strain is poured, the system is rapidly started; and the strain has broad application prospects in wastewater denitrogenation treatment processes, and is especially suitable for treatment of wastewater containing nitrogen oxides and organic pollutants.

The invention discloses a composite live bacterial organism purifying agent and a method for the production thereof, the biological purifying agent contains Bacillus subtilis KX-1 CCTCC No. M 208057, Bacillus subtilis KX-2 CCTCC No. M 208058, and Bacillus subtilis KX-4 CCTCC No. M 208060, and the total bacteria count is larger than 1x10<8>CFU/g. The biological purifying agent can effectively remove ammonia nitrogen and nitrite in water and improve the water pollution; and degrade organic macromolecules and reduce the rich nutrition level in water; and the three bacilli can decompose organic macromolecule matters in water into saccharide, amino acid, vitamin, bioactive substances (hormone), etc. that can be absorbed by animals and plants, thereby realizing the complementary nutrition and harmonious symbiosis, and forming a complex and stable microbial system in water by proliferation.

The invention provides a microemulsified cutting fluid. The microemulsified cutting fluid comprises following ingredients, by weight, 3.00 to 21.00% of a pH value conditioning agent, 0.50 to 4.00% of an antirust agent, 0.50 to 2.00% of a bacteriostatic agent, 6.00 to 18.00% of an anionic surfactant, 1.00 to 5.00% of a nonionic surfactant, 1.00 to 4.00% of a corrosion inhibitor, 4.00 to 15.00% of a base oil, and 40 to 50% of water. The microemulsified cutting fluid possesses excellent rust resistance, lubricating properties, and especially excellent corrosion resistance on aluminium alloy, so that a problem that corrosion resistance of conventional microemulsified cutting fluid on different aluminium alloy processing is poor is solved. The microemulsified cutting fluid is suitable for processing of metal such as aluminium parts and steel parts. The microemulsified cutting fluid contains no toxic chemicals, such as nitrite and hydrozybenzene, which are harmful for human body or the environment, is friendly to the environment, and is high in efficiency.

The invention belongs to the technical field of environmental organisms, and relates to paracoccus denitrifican with heterotrophic denitrification, autotrophic denitrification and iron reduction functions and a culturing method and an application thereof. The bacterium is paracoccus denitrifican ZGL1 with the collection number CCTCC M2012158, and can be used for completing heterotrophic denitrification and autotrophic denitrification processes (including sulfur autotrophic denitrification and iron autotrophic denitrification) and effectively reducing ferric iron. During waste gas treatment, reduction of Fe(II)EDTA-NO and regeneration of Fe(II)EDTA are realized simultaneously for the same strain in a BioDeNOX denitration process, the aim of continuously denitrating is fulfilled, and low energy consumption, small investment and low running cost are realized. During waste water treatment, the strain can be used for removing nitrate and nitrite from waste water in a heterotrophic denitrification process, can be applied to waste water denitrification through sulfur autotrophic denitrification and iron autotrophic denitrification processes, is low in cost, and has a simple process.

A method is disclosed for synthesizing a crystalline metal oxide powder material containing two or more uniformly distributed metal elements. Crystalline, water containing, oxygen containing inorganic acid salts of the metals are heated to liquefy the salts. The apparent solution contains a uniform mixture of the metal elements. The water is removed from the liquid and the resulting powder calcined in air to decompose the acid salts to a mixed metal crystalline oxide. The method is particularly useful to make doped LiNiO₂ type crystals using hydrated nitrate or nitrite salts of Li, Ni and the dopant elements. Examples of useful salts are LiNO₃.H₂O, Ni(NO₃)₂.6H₂O, Co(NO₃)₂.6H₂O, Al(NO₃)₃.9H₂O, and Mg(NO₃)₂.6H₂O.

The invention belongs to the treatment field of waste water, and provides a method for converting active sludge into autotrophic denitrified sludge based on a mixed type continuous flow reactor. The method which is used for converting the common active sludge into the autotrophic denitrified sludge by the continuous flow reactor specifically comprises two stages. The first stage comprises the steps of: converting anaerobic or anoxic sludge into a nitrosation status by the condition which controls the organic matter concentration (COD (chemical oxygen demand) is less than 20mg/L), the water dissolved oxygen concentration (1-0.5mg/L), and the inflowing ammonia nitrogen concentration (50-450mg/L), and restraining the growth of the other microorganisms step by step by the running condition and the washing characteristic of the continuous flow reactor. When the cumulative percentage of the nitrite is more than 60%, the second stage is started. The second stage comprises the step of: promoting the nitrosation status to be converted into the autotrophic denitrification status by the condition which improves the ammonia nitrogen concentration (450-550mg/L), reduces the dissolved oxygen (0.5mg/L), and keeps a certain PH value (7.5-8.0) to form a system which is coupled nitrosified microorganism to anammox microorganism. The practice proves that the system can stably run for a long term. After entering into the practical running stage of the waste water treatment, the method leads the ammonia nitrogen removing rate and the total nitrogen removing rate to be respectively more than 80% and 70% by the reaction which is remained only by the natural reoxygenation or a small quantity of aeration without aeration.

This invention comprises wood preservative compositions based on alkaline copper quaternary formulations having reduced corrosivity to metals by addition of a soluble nitrite salt and a dicarboxylic acid and methods for their use in reducing corrosivity of metals.

The present invention discloses an additive which increases the performance of the solidifying free chloride ion cement-based material and the using method thereof, the additive comprises silicon-aluminum oxide material and nitrite, and the mass ratio between the silicon-aluminum oxide and the nitrite is 8-9:1. The mixing amount of the additive in the cement base material is 25%-35%, when the additive is mixed into the capacity of the system for solidifying chlorine ion can be remarkably increased, and the capacity for solidifying the chlorine ion by the cement-based material can be increased by 100%; and other capability of the cement-based material can be improved. When the additive is mixed the single cube price of the cement-based material can be reduced, the cost performance is high and the application is easy.

Despite the excellent properties associated with Magnesium OxyChloride (Sorel) based cements and Magnesium OxySulfate based cements, water and corrosion resistance has been limiting factors for achieving greater commercial applications. Such issues can be addressed by incorporating various alkali metal phosphates, such as Magnesium mono- or dihydrogen phosphate (MgHPO₄ or MgH₂PO₄) with alkali metal fatty acids; such as Magnesium Stearate; and metal or alkali metal sulfates such as Aluminum Sulfate or Magnesium Sulfate. Water resistance is further enhanced by either pre-carbonating the mix water or the liquid magnesium chloride phase of the cements, or by adding a carbonate into the powder phase. Accelerated cure of this system has also been obtained by using various inorganic metal oxides. Additionally, improved corrosion resistance is achieved through the use of certain phosphates, zeolites, nitrites and other novel additives.

The invention relates to the processing field of meat, and in particular relates to a processing method of preserved pork. The method specifically comprises the following steps of: cutting fresh meat into cutlets, coating a seasoning matter until no water flows from the cutlets, wherein the seasoning matter comprises salt with the weight 0.4 to 0.8 times that of the fresh meat, honey with the weight 2-5 percent of that of the fresh meat and bitter allium with the weight 0.3-10 percent of that of the fresh meat; stewing and pickling the cutlets for 7 to 15 days under 0 to 6 DEG C, soaking the pickled meat for 8 to 14 hours by black tea water or Pu'er tea water, cleaning and draining, and baking under 40 to 60 DEG C so as to obtain the low nitrite preserved pork. The preserved pork is good in mouthfeel, and good in color. In the preparation process of the preserved pork, the black tea water or the Pu'er tea water in an appropriate mixture ratio is used as a seasoning toner; the preserved pork is suitable for patients with hyperlipoidemia. For the preserved pork, the bitter allium is used for replacing spice garlic; the preserved pork contains full garlic taste, and can obviously reduce the low nitrite.

The invention discloses a multifunctional scale and corrosion inhibitor which integrates four effects, namely, scale inhibition, scale removal, corrosion inhibition and perfillmimg, and a preparation method thereof. The scale and corrosion inhibitor is of a nitrogen-free, non-phosphorus and molybdenum formula, and is prepared by compounding a non-phosphorus scale and corrosion inhibition component, methylbenzotriazole, hydrolytic polymaleic anhydride, sodium molybdate and sodium gluconate. According to the multifunctional scale and corrosion inhibitor, usage of phosphorus and nitrite is avoided, usage of molybdate is reduced, the multifunctional scale and corrosion inhibitor has the characteristics of being efficient, practical, non-toxic, environment-friendly, and low in cost, is applicable for scale and corrosion inhibition of water with high salinity and high degree of mineralization, can be widely applied to water treatment fields such as cold and hot circulating water, softened water and reverse osmosis, and the oilfield exploitation field.

The invention discloses a rapid production method of flavored pickled vegetables. The rapid production method comprises the following steps: selecting raw materials, carrying out ultrasonic salting, carrying out lactobacillus fermentation, blending with flavor condiments, enabling the vegetables to be tasty by ultrasonic waves, and weighing and packaging the product. The rapid production method is simple in production process, easy to control and suitable for industrial production; the pickled vegetable product is delicious, tender and crispy, has a moderate salty and sour taste and has a nourishing nutrition; the used ultrasonic treatment not only accelerates the speed of salting and enabling the product to be tasty and shortens the needed time for processing, but also can also prevent nitrite from being generated, so that the content of nitrite is reduced and the safety of the flavored pickled vegetables is improved.

The invention relates to a short-range denitrification in-phase denitrification dephosphorization process and a device thereof and pertains to the technical field of sewage treatment. The flow of the process is anaerobic process, aerobic process, hypoxia, rapid aeration and sedimentation tank. Divided-flow water inlet is adopted, a part of raw water enters an anaerobic reactor and a part enters a first aerobic reactor. A part of water outlet of the anaerobic reactor enters the first aerobic reactor, and a part enters a first hypoxia reactor. A rapid aeration tank is arranged behind a hypoxia reactor, and the water outlet enters the sedimentation tank. By controlling the way of water inlet and the concentration of dissolved oxygen in the aerobic reactor, the process can finish short-rang nitration denitrification in the aerobic reactor under the condition of normal temperature, accumulation of nitrite can be realized, denitrification dephosphorization that nitrite is electron acceptor is finished in the hypoxia reactor. The process can realize short-range nitration and denitrification dephosphorization that nitrite is electron acceptor under the condition of normal temperature and maximally realize energy saving and consumption reduction of sewage treatment.

A method for preparing 2,3-dichloropyridine is disclosed in which 3-amino-2-chloropyridine is contacted with an alkali metal nitrite in the presence of aqueous hydrochloric acid to form a diazonium salt; and the diazonium salt is subsequently decomposed in the presence of copper catalyst wherein at least about 50% of the copper is the copper(II) oxidation state.

The invention discloses a method for controlling temporary breeding and packing prepared for aquatic product transportation. According to the method, when fishes are put into a temporary breeding tank, the water temperature of the temporary breeding tank is controlled to be between 8 and 25 DEG C, and the temporary breeding time of the fishes in the temporary breeding tank is 20 to 30 hours; during temporary breeding, after the fishes are put into the temporary breeding tank for 4 hours, the water temperature is reduced for 0.15 to 0.3 DEG C each hour, and when the water temperature is reduced for 2 to 2.5 DEG C, the water temperature is kept unchanged; in the temporary breeding tank, the water is replaced continuously in a circular mode, the salinity of the water in the temporary breeding tank is 0.1 to 0.5 percent, the PH value of the water quality is 5 to 8, the ammonia nitrogen content in the water is less than 0.6 milligram/liter, and the nitrite content in the water is less than 0.2 milligram/liter; and during packing, the water temperature in a packing box is controlled to be between 4 and 19.5 DEG C, the salinity of the water in the packing box is 0.1 to 0.5 percent, the PH value of the water quality is 5 to 8, the ammonia nitrogen content in the water is less than 0.6 milligram/liter, the nitrite content in the water is less than 0.2 milligram/liter, and the dissolved oxygen in the water is more than 3 milligram/liter. Compared with the prior art, by the method, the transportation survival rate can be improved, and the viability of aquatic products is improved, so that the freshness and deliciousness of meat is kept.

A skin dressing is provided comprising a first component comprising a source of protons, a second component comprising a nitrite salt, the dressing comprising a non-thiol reductant, such that, when the first and second components are brought together and applied to a skin site the nitrite reacts to generate nitric oxide, increasing the pH of the dressing in contact with the skin from an acidic value to a more neutral value.