36 results about "Urea nitrate" patented technology

A solid fertilizer composition comprising urea nitrate and calcium phosphate; and a liquid fertilizer composition comprising urea nitrate and calcium phosphate both dissolved in water. These fertilizer compositions are fertilizers capable of feeding nitrogen, phosphoric acid and calcium which are crucial for the growth of plants, excelling in storage stability, and when dissolved in water, would not generate phosphate precipitates. These fertilizer compositions are suitable for use in a nutrient solution cultivation method, and, for example, the liquid fertilizer composition is applied to the stems and / or leaves of plants.

The invention provides a device for bleaching a nitric acid solution through a urea method and a preparation method therefor. The device comprises an acid preparation tank and a urea storage tank, wherein the acid preparation tank is connected with the urea storage tank through a communicating pipe; the top end of the acid preparation tank is connected with one inlet end of an ejector through a nitrogen dioxide pipe, the other inlet end of the ejector is connected with the urea storage tank, and the outlet end of the ejector is connected with a liquid distributor horizontally arranged inside the acid preparation tank through a urea pipe; and the outlet of the urea storage tank is connected with the urea pipe and the ejector respectively through a circulating conveying pump. Under micro negative pressure, NO2 in nitric acid and a urea solution both enter the ejector for reaction, and enter the acid preparation tank together with the urea solution to react with carbon dioxide generated later. Long-acting colorlessness of the nitric acid solution can be realized for a long time, so that the content of carbon dioxide in the acid preparation tank is quickly controlled, and the content overstandard problem of nitrogen dioxide is solved.

The invention relates to a special sensitizer for emulsion explosives, particularly a high-efficiency foaming agent for explosives. The high-efficiency foaming agent for explosives is prepared by mixing a component A and a component B according to the weight ratio of 1:(1.2-1.5). The component A is prepared from the following components in percentage by weight: 0.5-1.5% of thiocarbamide, 3-5% of potassium nitrite, 0.9-1.5% of urea, 20-30% of sodium nitrite and 62-75.6% of water. The component B is prepared from the following components in percentage by weight: 0.7-1% of nitric acid, 7-11% of ammonium nitrate, 0.2-0.5% of ammonium chloride, 0.2-0.6% of phosphoric acid, 0.5-2% of ammonium monoacid phosphate, 0.1-2.5% of ammonium thiocyanate, 1.8-2.5% of citric acid, 0.7-1.5% of glacial acetic acid, 1.5-2.5% of urea nitrate, 0.9-1.5% of urea and 74.4-86.4% of water. The invention has the characteristics of high foaming speed, weak acidity, high storage stability, long natural storage period, small aftereffect, favorable foaming effect and the like.

The invention provides a low-detonation-velocity mixed explosive for explosive welding and its preparation method and application, which is specially used for explosive compounding of low-melting-point metals. The components (mass percentage) of the low-detonation-velocity mixed explosive include: 60-70% antimony-free rock Ammonium nitrate explosive (70-85% ammonium nitrate, 3-6% wood powder, 10-20% modified urea nitrate, 1.5-4% compound modifier), 15-20% calcium carbonate powder, 5-15 % silicon carbide powder and 5‑10% water. The low detonation velocity explosive is prepared by uniformly mixing the above components on site. The explosive of the present invention can significantly reduce the detonation velocity of common antimony-free rock ammonium nitrate explosives and the cost of explosive composite explosives; the present invention is easy to produce and stable in performance, and solves the problem of excessively high detonation velocity and easy destruction when conventional explosives are used to prepare explosive composite plates of low-melting-point metal materials Disadvantages of low melting point materials. Explosives with different detonation velocity requirements can be prepared on site according to different materials, the process is simple, and it is suitable for large-scale application.

The invention discloses an acid solution system for acidifying carbonate reservoir rocks, and belongs to the field of petrochemical industry. The acid solution system comprises the following components in percentages by mass: 10-50% of sulfamic acid, 10-50% of urea nitrate, 3-15% of organic weak acid, 0.1-5% of a cosolvent, 0.1-2% of a corrosion inhibitor, and the balance being water. The acid solution system has the advantages of high corrosion rate, large increasing range of the corrosion rate, low corrosion rate, and the like. The acid solution system provided by an embodiment has the advantages of simple formula, wide freight source of each component, transport convenience, and low cost; and the system is good for large scale on-site construction application.

The invention discloses a whole-process nutrient supply type composite fertilizer and a preparation method thereof. A raw material containing nitrate nitrogen, ammonium nitrogen, amide nitrogen, controlled release nitrogen and organic matters is added in the material. The components of the whole-process nutrient feeding type composite fertilizer are effectively proportioned in percentage by mass on the basis of nitrogen content: 2-4% of nitrate nitrogen, 5-8% of ammonium nitrogen, 5-8% of amide nitrogen and 6-10% of controlled release nitrogen, the contents of phosphorus and potassium are determined according to different product proportions, and the content of the organic matters is not less than 6%. In the production process, the viscosity of urea nitrate generated in a reaction of ammonium nitrate phosphate and urea and granulation tail gas washing water are used as liquid phase amount necessary for granulation to finish the material granulation process, in order to prevent excessive urea nitrate from being generated in the granulation process, ammonia gas is directly introduced into the material layer of a rotor drum granulator to finish the ammoniation treatment of ammonium nitrate phosphate and control the quantity of the urea nitrate generated in the reaction. The fertilizer not only can improve the utilization rate of fertilizer nutrients and ensure the whole-process nutrient supply of crops so as to increase the yield of the crops and improve the quality, but also can avoid harm caused by escherichia coli and such toxic substances as heavy metal, improve the soil, reduce the soil salinity and fertilize the land.

The invention discloses a production method of a readily available and controlled release composite fertilizer containing three nitrogen elements. The production method is as follows: raw materials containing nitric nitrogen, ammonium nitrogen and amido nitrogen are added in materials; in order to prevent that urea reacts with nitro phosphate fertilizer to generate too much urea nitrate and the production can not performed, ammonia gas is introduced in the granulation process according to different proportions to ammonify nitro phosphate fertilizer, reduce the generation of urea nitrate and increase the neutralization degree of monoammonium phosphate; and powdery fundamental fertilizers containing nitrogen, phosphorous and potassium are added to granulate, and then the composite fertilizer can be obtained through drying, cooling, screening and coating. In the production method of the invention, a lot of heat generated in the thermolysis of the nitro phosphate fertilizer and the neutralization heat of the reaction of ammonia gas and monoammonium phosphate are fully utilized to heat materials and increase the granulation temperature; and the viscosity of urea nitrate is utilized, the solubility of ammonium phosphate salt is increased, the quantity of the liquid phase for granulation can be satisfied, higher granulation rate can be realized without using other adhesive, the cost is reduced, the water content of the granulation material is significantly reduced, the drying energy consumption can be reduced and a large amount of energy consumption can be saved.

The invention belongs to the technical field of oil exploitation, and particularly relates to a hydrogenation hot gas chemical yield increasing solution component capable of being used for increasing productivity of a low-yield low-permeability oil well. The solution component comprises first solution and second solution, the mass ratio of the first solution to the second solution is 1:1, the first solution comprises ammonium nitrate, ammonium chloride, urea, urea nitrate, glucose and water, and the second solution comprises sodium nitrite, urea, aluminum dodecaboride and carbon dichloride. The first solution and the second solution react, carry energy, penetrate through a well-cased perforating area of the oil well at a high speed and enter micro-cracks and air holes of near wellbore region rock strata, the micro-cracks can be broken through under the action of high-temperature high-pressure gas, oil-gas seepage channels are communicated, seepage resistance is decreased, drainage area is increased, accordingly, permeability of the near wellbore region rock strata is improved, and further the productivity of the individual well is increased.

The invention discloses a method for synthesizing L-2, 4-dinitrobenzene lactamine. L-4-nitrobenzene lactamine is dissolved in concentrated sulfuric acid, and urea nitrate or nitrourea is added to react for 1-20 hours at the temperature of 0-100 DEG C. The mol ratio of the urea nitrate or nitrourea and the L-4-nitrobenzene lactamine is 1.2-3.0:1. An obtained reaction product is put into ice water;then pH is adjusted to neutral by alkaline substance; solvent is removed; residual solid is recrystallized by saturated fatty alcohol; and separated yellow solid is the L-2, 4-dinitrobenzene lactamine. The method for producing the L-2, 4-dinitrobenzene lactamine is characterized by good safety, convenient operation and high yield.

Formulations of reactive materials, such as aluminum, magnesium and alloys thereof, with combustible additives such as wood derivatives or charcoal, provide a composition for neutralizing energetic materials via combustion. Specifically, explosive substances such as ammonium nitrate and urea nitrate, which are commonly used as homemade explosives, are rapidly incinerated in a non-propagating manner by the contact with burning reactive material formulations.