11 results about "Nitrogen rich" patented technology

The application discloses a preparation method of an environment-friendly chitosan-based heavy metal adsorption air-precipitated bead, and comprises the following steps: preparing chitosan water-precipitated beads through acid-base neutralization solidification, loading the ammonia metal organic framework UiO-66-NH2 prepared through hydrothermal reaction on the chitosan water-precipitated beads through Schiff base reaction of a crosslinking agent, and then further loading polyethylene imine on the composite water-precipitated beads through the same loading means. The CS-UiO-GA-PEI-GA air-precipitated bead adsorbent is prepared through freeze-drying of the water-precipitated beads by a freeze dryer. The secondary crosslinking method gives the adsorbent certain mechanical strength, and provides a basis for regeneration and circulation of the adsorbent; the nitrogen-rich polyethylene imine and the high-porosity UiO-66-NH2 greatly enrich the active adsorption sites of the adsorbent, and significantly improve the adsorption capacity of the adsorbent for Cr(VI); and the removal rate of the adsorbent for Cr(VI) is up to 100% in the detection limit range of Cr(VI).

The invention relates to the technical field of grain and oil by-product high-value utilization and food functional ingredient preparation, in particular to a nitrogen-rich mesoporous carbon-based cholesterol adsorption ingredient as well as a preparation method and application thereof. According to the method, soybean meal and rice bran are taken as a carbon source and an endogenous nitrogen source, and urea or melamine is compounded as an exogenous nitrogen-rich precursor, so that an internal-external synergistic nitrogen-rich system is constructed; the method comprises the following steps: compounding a zinc chloride or potassium hydroxide chemical activator with a ferric chloride catalytic graphitizing agent to form a nitrogen-rich-catalytic synergistic conversion system; the method comprises the steps of raw material pretreatment, nitrogen-rich slurry preparation, catalytic activation precursor preparation and the like. The prepared carbon-based ingredient has a developed mesoporous structure and high-content alkaline nitrogen-containing functional groups, and is large in cholesterol adsorption capacity and high in selectivity, and the raw materials are grain and oil processing byproducts, so that the cost is low, and the carbon-based ingredient is green and environment-friendly; the preparation process has the advantages of controllable parameters and good repeatability, is suitable for industrial production, and provides a new technical path for the development of functional food ingredients for reducing blood fat.

The application discloses a kind of microbial compound microbial inoculant and preparation method thereof, the microbial compound microbial inoculant includes microbial inoculum and its fermentation product and carrier;The microbial inoculum includes bacillus subtilis and bacillus licheniformis;The carrier is nitrogen-rich grafted biochar;The nitrogen-rich grafted biochar is prepared after grafting acrylic acid and modified monomer after being modified by nitrogen-rich biochar.The microbial compound microbial inoculant provided in the application can significantly improve the adsorption capacity and flocculation capacity of the microbial inoculant for particles in wastewater by compounding microbial inoculum with excellent flocculation capacity with charge-modified and adsorbed carrier to make microbial inoculant, thereby effectively reducing the content of COD components, ammonia nitrogen and total phosphorus in wastewater, and can be widely applied in the field of wastewater treatment.

The application discloses a preparation method and application of a multi-level pore biomass activated carbon, and belongs to the technical field of activated carbon preparation. The method uses a mixture of nitrogen-rich agricultural and forestry wastes and industrial by-products as raw materials, optimizes a pretreatment process, innovates a composite activation system, and controls carbonization-activation parameters, so that a biomass-based activated carbon rich in nitrogen elements and having multi-level pores is prepared. The nitrogen elements in the raw materials can be used for nitrogen doping of the activated carbon in the carbonization-activation process. The application effectively solves the problems of low utilization rate of raw materials, single pores and the like in the existing activated carbon preparation process, solves the problem of difficult treatment of industrial by-products, simultaneously simplifies the preparation process of the nitrogen-rich activated carbon, has economic value and environmental protection benefits, and can be widely applied to the fields of water treatment, carbon capture and deep treatment of industrial wastewater and the like.

This invention provides an immersion preservation method and preservation solution that maintain organs for transplantation in good condition for a longer period than conventional methods. [Solution] The present invention relates to a method for preserving organs for transplantation, which involves immersing the organs in a nitrogen-rich UW solution at a temperature suitable for immersion preservation, where the dissolved oxygen content is 1.0 mg / L or less and the nitrogen content is 90 mg / L or more at one atmosphere. As an example, a nitrogen-rich UW solution is prepared in which the dissolved oxygen content is 1.0 mg / L or less and the nitrogen content is 90 mg / L or more at one atmosphere and a temperature suitable for immersion preservation, and the organs for transplantation are immersed in the prepared nitrogen-rich UW solution. As another example, a nitrogen-rich UW solution is prepared in which the dissolved oxygen content is 1.0 mg / L or less and the nitrogen content is 90 mg / L or more at one atmosphere and room temperature, and the prepared nitrogen-rich UW solution is cooled to a temperature suitable for immersion preservation before the organs for transplantation are immersed in it.

A system and method for removing nitrogen from a natural gas or liquid natural gas flow. More specifically, a system and method for removing nitrogen from a natural gas feedflow using a two-column system in which the first column operates at a pressure lower than the operating pressure of the second column. A first nitrogen-enriched vapor flow from the first column is compressed and cooled, and the resulting flow is then led to a second column, which generates a second nitrogen-enriched vapor flow and a second methane-enriched liquid flow. Cooling in the system is provided in a heat exchanger, which heats the first methane-enriched liquid flow from the first column and the second methane-enriched liquid flow from the second column.

The invention provides an inerting system 22 with a vortex tube 24 for separating air into nitrogen enriched air (NEA) and oxygen enriched air (OEA). The inerting system 22 has a warming device 58 whi

A method and system in which an oxygen concentrator, which removes O2 from ambient air and exhausts the oxygen-depleted, nitrogen-rich air, is used in combination with an enclosed cargo storage or transportation container to replace the oxygen-rich ambient air within the container with nitrogen-rich ambient air that will retard spoilation of cargo that is prone to oxygen-induced spoilation, such as fruits and vegetables.

An airborne nitrogen generator with adaptive flow rate regulation of nitrogen-enriched gas is disclosed. The bleed air and treatment subsystem receives engine bleed air from the engine and ram air from outside the engine. After processing by the bleed air and treatment subsystem, the engine bleed air and ram air are sent to an air separator. A temperature sensor is installed at the inlet of the air separator, and a pressure-sensitive flow control valve is installed at the nitrogen-enriched gas outlet of the air separator. The nitrogen-enriched gas flows through the pressure-sensitive flow control valve and into the fuel tank through a nitrogen-enriched gas distribution pipeline. After gas exchange with the gas phase space inside the fuel tank, the nitrogen-enriched gas is discharged from the fuel tank through an active exhaust valve. The temperature sensor and the active exhaust valve are connected to a host computer. This invention enables adaptive flow rate regulation of nitrogen-enriched gas, maintaining both low oxygen concentration and fuel tank pressure, effectively simplifying the control logic of the equipment, and ensuring safety and high efficiency.

The present invention relates to a process for hydrotreating a nitrogen rich liquid oil stream by, in a continuous operation in a fixed bed reactor, reacting the nitrogen rich liquid oil stream with hydrogen in the presence of catalyst at a temperature of 80-250° C., a pressure of 10-200 barg, a liquid hourly space velocity (LHSV) of 0.1-6 h−1, thereby forming a stabilized liquid oil stream.