21 results about "Nitrate ester" patented technology

The invention discloses a nitrate-containing waste liquid treatment method, which comprises: (1) waste acid treatment: diluting waste acid in a neutralization reaction kettle, adding ammonia water while stirring, controlling the temperature to be 70-95 DEG C, continuously adding ammonia water to adjust the pH value of the solution to be 7.5-10.0 after the neutralization is completed, and carrying out stirring distillation to obtain an ammonium sulfate nitrate aqueous solution or an ammonium sulfate nitrate crystal; (2) wastewater treatment: 1) wastewater steam stripping: transferring nitrate wastewater into a steam stripping kettle, adding a pH regulator to regulate the pH value to be 10-13, heating the steam stripping kettle to a boiling state by using steam, distilling, condensing and recovering nitrate in the wastewater; and 2) oxidation treatment: after steam stripping is finished, hydrogen peroxide is added into the steam stripping kettle in a boiling state, stirring reaction is performed, and the reacted wastewater can be discharged after reaching the standard. Compared with a traditional Fenton method and an activated carbon adsorption method, the method has the advantages that secondary pollutants Fe (OH) 3 generated by treatment and saturated activated carbon after adsorption can be avoided, harsh reaction conditions such as light, electricity and microwaves can be avoided, the operation cost is reduced, the method is safe, environment-friendly and free of secondary pollution, the nitrate removal rate can reach 100%, and the method is suitable for industrial production. The COD (Chemical Oxygen Demand) of the treated wastewater is less than 100mg / L, and the wastewater can reach the direct discharge standard.

The invention discloses application of polyol nitrate in frostbite resistance, and belongs to the technical field of skin protection articles. The polyol nitrate is used as an active component of the ointment, and by slowly releasing nitric oxide and activating vascular endothelial nitric oxide synthase, spasm capillaries in the early stage of frostbite are effectively relaxed, platelet aggregation and thrombosis are inhibited, so that the pathological cascade reaction of frostbite is blocked, and the prevention and treatment effects on frostbite are remarkably improved. Compared with the prior art, the polyol nitrate and the ointment are scientific and reasonable in preparation method and safe and convenient to use, and a brand-new and effective solution is provided for prevention and treatment of skin frostbite in a cold environment.

The application discloses an end hexaazido nitrate polyether adhesive and a synthesis method thereof. The method first takes triazido neopentyl alcohol and glycidyl ether nitrate as raw materials, boron trifluoride-ether complex as a catalyst, and obtains triazido neopentyl polyglycidyl ether nitrate alcohol through cation ring-opening polymerization reaction; then takes triazido neopentyl polyglycidyl ether nitrate alcohol and hexamethylene diisocyanate as raw materials, dibutyl tin dilaurylate as a catalyst, and obtains end hexaazido polyglycidyl ether nitrate through addition reaction, namely the end hexaazido nitrate polyether adhesive. The application is mainly used for solid propellants, is used for synthesizing polytriazole elastomers, improves the content and crosslinking density of hard segments, promotes microphase separation of the elastomers, and thus improves mechanical properties.

The invention relates to the technical field of solid rocket propellants, and particularly discloses a phosphoric acid modified cyclic borate bonding agent and a preparation method and application thereof.The bonding agent does not contain nitrogen atoms, contains a cyclic structure, further introduces high-polarity phosphorus-oxygen (P = O) groups and has multiple hydroxyl groups capable of participating in a curing reaction; the compatibility with nitrate in a high-energy propellant is good, and ammonia release caused by the adoption of a bonding agent containing amido is avoided; the catalyst has good hydrolytic stability, and can generate a bonding effect with a nitramine filler in a coordination bonding manner; by improving the surface and interface performance of the solid filler and increasing the infiltration speed of the adhesive to the solid filler, the pharmaceutical process performance of the propellant can be improved; and the polymer can also be used as a chain extender and a reinforcing agent to optimize and regulate a matrix network structure, so that the purposes of high strength and high elongation are achieved. The bonding agent can meet the development requirements of NEPE high-energy propellants on high mechanical properties and optimized process properties.

The invention discloses a method for preparing 3-hydroxypropyl nitrate by continuous flow, the 3-hydroxypropyl nitrate is continuously prepared by a three-step method of monoacetylation, nitration and hydrolysis, and the prepared compound can be confirmed by a 1H NMR (nuclear magnetic resonance) characterization method. Meanwhile, through a two-step continuous flow reaction technology and a two-step online continuous separation technology which are connected in series, continuous production is realized, and key reaction parameters such as material mixing, heating and retention time can be accurately controlled, so that the product quality is improved, impurities are controlled, the chemical reaction is allowed to react in a higher temperature range without temperature runaway, and the product quality is improved. The reaction speed can be increased in reaction thermodynamics, the production efficiency is improved, heat accumulation of kettle type reaction is avoided, and the reaction is safer; the post-treatment process of the flow chemistry is always online, so that the reaction is cleaner, automatic and online sample collection is convenient to realize, reaction parameters are convenient to change, optimal reaction conditions are convenient to find, and the process exploration and substrate screening efficiency is greatly improved.

The invention relates to a porous arylamine polymer stabilizer (POP-EDA) suitable for nitrocotton, which is prepared from a node unit 1, 3, 5-tribromobenzene and a connecting unit ethylenediamine. As chain fatty amine, ethylenediamine not only can introduce NOX absorption active sites, but also can construct a non-conjugated spatial network arylamine polymer structure. Compared with a conventional stabilizing agent, the polymer has high thermal stability and a relatively high specific surface area, not only has efficient physical adsorption capacity on nitrogen oxides generated by decomposition of nitrocotton, but also can stably and chemically fix the nitrogen oxides, so that autocatalytic decomposition of the nitrocotton is inhibited, and the service life of the nitrocotton can be effectively prolonged. The problems of poor thermal stability, few reaction active sites, generation of by-product gas, poor stabilizing effect and the like of the existing small-molecule stabilizing agent are solved, and the stability of the nitrate-based energetic material can be widely enhanced.

The invention belongs to the technical field of stabilization of nitrate ester compounds, and particularly relates to application of poly (p-phenylenediamine) as a stabilizer for the nitrate ester compounds, and the addition amount of the poly (p-phenylenediamine) is 2.9%-3.1% on the basis of the total weight of the nitrate ester compounds. The preparation method of the poly (p-phenylenediamine) comprises the following steps: taking ammonium persulfate as an oxidizing agent, taking p-phenylenediamine as a monomer, adopting a spiral gas-solid two-phase flow technology, and enabling raw material solid particles to mutually rub and collide to initiate an oxidative polymerization reaction, so as to prepare the poly (p-phenylenediamine). The poly (p-phenylenediamine) has the characteristics of low price, easiness in synthesis, no toxicity, excellent nitrogen oxide absorption capacity and the like, has good compatibility with nitrate ester compounds, can effectively reduce the autocatalysis phenomenon and improve the long-term stability of the nitrate ester compounds, can avoid the toxicity problem of the traditional amine stabilizer when being used as the stabilizer, and has the advantages of low cost, low cost and the like. The environment and human health are facilitated.

The present invention provides a method for generating nitrite and / or nitrate ions from a nitrate ester and a method for detecting nitrate esters in a mixture by generating and detecting nitrite and / or nitrate ions.

The invention relates to the technical field of analytical chemistry sample pretreatment, and discloses a method for extracting organic nitrate in pine needles under a biological passive sampling technology, which comprises the following steps: after methanol ultrasonic extraction and primary centrifugation, setting a pre-purification step: placing supernate in a low-temperature environment of-25 DEG C to-35 DEG C for standing treatment, by utilizing the characteristic that the solubility of matrix interferents such as vegetable wax and lipid is reduced at the low temperature, the matrix interferents are separated out in a solid form; and separating and removing the solidified interferent through secondary centrifugation to obtain a clear supernatant, and then carrying out solid-phase extraction and purification. Through the pre-purification step, the blockage of the solid-phase extraction column is effectively avoided, the recovery rate of the target object is remarkably improved, and the matrix effect in the analysis test is weakened, so that the accuracy and precision of the method are improved.

A process for drying and / or purifying, preferably drying and purifying, aliphatic or cycloaliphatic nitrate esters (nitric acid esters), in particular for removing water and volatile impurities, especially those arising during the production and / or washing of the nitrate esters, wherein the process comprises the following process steps: (a) first, the crude nitrate esters obtained from a production process are subjected to washing with a washing medium, followed by separation of the washing medium; (b) subsequently, the washed crude nitrate esters obtained in process step (a) are subjected to drying and / or purification, preferably drying and purification, by contact, in particular by flowing, with an inert gas, in particular such thatthat water present in the washed crude nitrate esters is removed and, at the same time and / or in the same way, volatile impurities arising in particular during the production and / or washing of the nitrate esters are removed.

An example of the present invention provides a fuel additive composition, which includes a mixture of a mixture of tert-butylhydroquinone, a catalyst, a lubricant, a lubricant, a lubricant, a lubricant, a lubricant, a lubricant, a lubricant, a lubricant, a lubricant, and a lubricant. The CAS number is 1948-33-0), and the CAS number is 1948-33-0), and the CAS number is 1948-33-0), and the CAS number is 1948-33-0, and the CAS number is 1948-33-0; the invention relates to a calcium acetylacetonate hydrate and a preparation method thereof. The calcium acetylacetonate hydrate is characterized in that the CAS number is 61789-86-4. The invention relates to a high-base-number petroleum calcium sulfonate, which is characterized in that the CAS number is 345909-31-1), and the high-base-number petroleum calcium sulfonate is prepared by the following steps of: preparing a high-base-number petroleum calcium sulfonate, a high-base-number petroleum calcium sulfonate and a high-base-number petroleum calcium sulfonate; the CAS number is 68783-96-0), and the content of sorbitan monolaurate (Sorbitan monolaurate; the CAS serial number is 1338-39-2) and 2-ethylhexyl nitrate ester (2-ethylhexyl nitrate; the CAS serial number is 1338-39-2) and 2-ethylhexyl nitrate ester (2-ethylhexyl nitrate; and the CAS serial number is 27247-96-7). The fuel additive composition according to one embodiment of the present invention can be added to various fuels such as gasoline, light oil, heavy oil and the like to improve the combustion efficiency at the time of fuel combustion while significantly reducing the generation of atmospheric pollutants such as particulate matter (PM), carbon monoxide (CO), hydrocarbon (HC), nitrogen oxide (NOx) and the like.

The invention discloses a system for flexibly preparing nitrate ester. The system comprises a Meilan acid storage tank, a fuming sulfuric acid storage tank, a first acid mixing ejector, a second acid mixing ejector, a first acid cooler, a second acid cooler, a polyhydric alcohol storage tank, a spraying nitrator, a coil pipe cooler, a kettle type continuous overflow nitrator, a centrifugal separator, a first dynamic washing separator and a second dynamic washing separator. The device comprises a first dynamic washing separator, a second dynamic washing separator, a third dynamic washing separator, a jet conveyor, a jet conveying water tank, a nitrate finished product temporary storage tank, a wastewater curved channel device, a nitrate-containing waste acid temporary storage tank, a flow meter, a gear pump, a three-way valve A, a three-way valve B, a three-way valve C and a three-way valve D, according to the system for preparing the nitrate ester, the nitrate ester can be prepared by selecting a spraying nitration process or a kettle type continuous overflow nitration process according to the characteristics of the nitrate ester.

The invention relates to a safe and efficient process for the nitrate ester formation of an α,ω-C3-10alkanediol monoacylate. The process is safer to operators and allows to obtain advantageous yields on industrial scale.

The invention relates to a method for detecting peroxy acyl nitrate ester substances in atmosphere, which comprises the following steps: adjusting a six-way valve to a sample injection mode, opening carrier gas and air inlet, enabling the carrier gas to pass through a first passage of the six-way valve and then sequentially purge a chromatographic column and an electron capture detector, and simultaneously opening a negative pressure device on the downstream side of the electron capture detector; air enters the sampling ring through a second passage of the six-way valve, and redundant air is exhausted by using an air extracting pump; the six-way valve is adjusted to be in a detection mode, carrier gas enters the sampling ring through a third channel of the six-way valve, and an air sample in the sampling ring is brought out and brought into the chromatographic column; pANs in an air sample are subjected to component separation in the chromatographic column and then enter the electron capture detector to be detected, meanwhile, the negative pressure device regulates and controls the internal pressure of the electron capture detector to be stable negative pressure, peak appearance of a compound to be detected is accelerated, and meanwhile the detection sensitivity of the electron capture detector is improved.

The invention discloses a treatment process for separating liquid nitrate in waste acid, and treatment equipment adopted in the treatment process comprises a temporary storage tank, a separation membrane, a liquid discharge pump, a high-position conveying assembly, a transfer storage tank, a recovery ejector and a washing separator, the treatment process comprises the following operation steps: filling the temporary storage tank with the nitrate-containing waste acid from the liquid inlet pipeline; the waste acid is discharged outwards through the separation membrane via the waste acid discharge pipeline; air is injected into the temporary storage tank, nitrate layering liquid located on the upper layer is squeezed into the nitrate high-liquid-level pipe and discharged into the transfer storage tank through the liquid discharging pipe, the recovery ejector sucks nitrate in the transfer storage tank into the washing and separating machine, and a finished nitrate product is separated out. The treatment process provided by the invention realizes separation of liquid nitrate in waste acid.

The invention provides a state nitrate ester compound stability evaluation method and a stability improvement method, and the method comprises the following steps: S1, placing a reference sample of liquid nitrate ester in a container, and obtaining reference stability time by adopting an Abell stability test; s2, monitoring the decomposition process of the reference sample by adopting an NO2 sensor under the Abell stability test condition to obtain the NO2 concentration in the container when the reference stability time is monitored, namely the stability concentration; calculating the unit stable concentration by combining the dosage of the test reference sample; s3, monitoring the decomposition process of the to-be-evaluated sample in the time interval from the beginning of the test to the reference stability time by adopting an NO2 sensor under the condition of the Abell stability test, and monitoring the unit test concentration of NO2 in the container; and S4, comparing the relative size of the unit stability concentration and the NO2 unit test concentration of the to-be-evaluated sample to obtain a stability evaluation result of the sample. According to the invention, digitization, objectization and accuracy of the stability evaluation result are realized.

The present invention relates to a transdermal dosage form, for promoting local blood flow, of a dual-acting PDE5 inhibitor / organic nitrate ester, and, more specifically, to: use, for preventing or treating various symptoms or diseases including hair loss, of a compound, or a pharmaceutically acceptable salt thereof, that promotes local blood flow by dual-acting as a soluble guanylate cyclase activator and a phosphodiesterase inhibitor; and a transdermal dosage form thereof. The compound promotes local blood flow so as to exhibit, without side effects, excellent effects of preventing and treating hair loss and other various diseases caused by decreased local blood flow, and, if intradermally injected using a microneedle, exhibits effects, that are remarkably better than those of treatment by application, of preventing and treating hair loss and other various diseases caused by decreased local blood flow even with less treatment frequency, and thus the compound can be effectively used as pharmaceutical and cosmetic compositions for hair loss alleviation and hair growth promotion compositions capable of replacing conventional hair loss therapeutic agents, which had limited application, and also can be used for treating various diseases caused by decreased local blood flow.

The invention discloses a treatment process for separating liquid nitrate from waste acid, and treatment equipment adopted in the treatment process comprises a temporary storage tank, a separation membrane, a liquid discharge pump, a high-position conveying assembly and a recovery tank, the treatment process comprises the following operation steps: filling the temporary storage tank with the nitrate-containing waste acid from the liquid inlet pipeline; the waste acid is discharged outwards through the separation membrane via the waste acid discharge pipeline; air is injected into the temporary storage tank, so that the nitrate layering liquid located on the upper layer is squeezed into the nitrate high liquid level pipe and discharged into the recovery tank through the liquid discharging pipe, and when the liquid level in the temporary storage tank reaches the lower end face of the nitrate high liquid level pipe, the valve on the air inlet pipeline is closed, and air injection is stopped; and 3) injecting the nitrate-containing waste acid into the temporary storage tank from the liquid inlet pipeline, and repeating the steps 2)-3) until the waste acid treatment is completed. The treatment process provided by the invention realizes separation of liquid nitrate in waste acid.

The present invention is related to the use of nitrates of ethers of glycerol and ethanol as diesel cetane improvers, and the production process of the same, aiming at producing an additive from glycerol from biodiesel production and bringing to the additive market an option more economical and efficient to facilitate the ignition of diesel and improve the cetane number of said fuel.

The invention discloses a treatment device for separating liquid nitrate in wastewater. The treatment device comprises a wastewater temporary storage tank, a separation membrane, a liquid discharge pump, a recovery ejector and a washing separator, a wastewater outlet is formed in the upper part of a right side plate of the wastewater temporary storage tank; the separation membrane is used for isolating nitrate from passing through the wastewater; a liquid inlet pipeline is led out of the nitrate-containing wastewater storage equipment and is inserted into the leftmost end of the inner cavity of the wastewater temporary storage tank, and a valve is arranged on the liquid inlet pipeline; a wastewater outlet of the wastewater temporary storage tank is connected with a wastewater pipeline, a liquid discharge pump and a valve are arranged on the wastewater pipeline, and a separation membrane is arranged at an inlet end of the wastewater pipeline; a liquid inlet lead-out pipeline of the recovery ejector is inserted into the bottom of the rightmost end of the inner cavity of the waste water temporary storage tank, and a liquid outlet of the recovery ejector is connected with a liquid inlet of the washing separator through a pipeline. The treatment device disclosed by the invention realizes normal-temperature treatment of the nitrate-containing wastewater.

The application discloses application of a polymer reinforced fiber material as a reinforcing material to improve mechanical properties of propellant, and the polymer reinforced fiber material is polyvinyl alcohol (PVA). The application method specifically comprises the following steps: uniformly dispersing the PVA in propellant tablets before plasticizing, and plasticizing and forming to obtain the propellant. The PVA is added into NC-NG-RDX nitrate propellant, and the PVA distributed in the propellant can effectively reduce the generation of micro-cracks of the propellant caused by factors such as pressure and temperature in the process of plasticizing and forming and shrinking, and the expansion of the cracks when the propellant is subjected to external force, so that the mechanical properties of the propellant can be improved.