9results about How to "Reduce phosphorus content" patented technology

This invention relates to a method for dephosphorizing waste oils. First, the raw material is pretreated using a low-pressure pyrolysis process, causing thermal degradation and polymerization of the non-hydrated phospholipids that are difficult to remove. Then, an ultrasonic-assisted acid washing process is coupled in, utilizing the ultrasonic cavitation effect to effectively disrupt the chelate structure between metal ions and phospholipid groups in the non-hydrated phospholipids. Simultaneously, the displacement effect of the ultrasound promotes relative movement and accelerated coagulation of the colloidal particles loosened by pyrolysis and acid washing in the oil phase, achieving ultrasonic-assisted demulsification and enhancing the subsequent separation efficiency between the aqueous and oil phases. Based on this, an organic acid solution is used as a complexing extractant to in-situ complex the released metal ions into water-soluble complexes, which are then transferred to the aqueous phase for separation. Through the synergistic effect of pyrolysis activating the structure, ultrasonic breaking of chelates, and organic acid complexation and transfer, this invention achieves deep dephosphorization of waste oils, significantly reducing their phosphorus content while preserving the original quality of the oils to the greatest extent possible.

The present application relates to the technical field of industrial water treatment, and in particular to a branched polycarboxylate, a high-temperature-resistant low-phosphorus scale-inhibiting dispersant for grey water and a preparation method thereof.The high-temperature-resistant low-phosphorus scale-inhibiting dispersant for grey water comprises the following raw materials in parts by weight: 6-10 parts of disodium ethylenediaminetetraacetate, 18-22 parts of hydrolyzed polymaleic anhydride, 0.3-0.8 parts of sodium hexametaphosphate, 15-20 parts of sodium polyacrylate, 1.5-2.5 parts of aminotrimethylene phosphonic acid mother liquor, 30-38 parts of branched polycarboxylate and 15-20 parts of deionized water.The obtained scale-inhibiting dispersant can effectively inhibit carbonate scale and sulfate scale, and has good high-temperature stability.

The present application relates to the technical field of electronic circuit preparation, in particular to a nano-modified PAI-based temperature-resistant high-entropy ceramic coating, a preparation method, a coating layer, a preparation method, a ceramic substrate electronic circuit and a preparation method.The present application uses high-entropy ceramic catalyst systems (CoCrFeMnZn)3O4 and (CoCrFeNiZn)3O4 with spinel structure as catalysts, and uses PAI as a binder for high-temperature-resistant ceramic coating, which can be obtained by spraying in a controllable thickness and can be processed on flat surfaces and curved surfaces.In addition, the ceramic characteristics after solidification and the effect of the binder have a good sealing effect on the surface pores of the sintered LTCC ceramic, thereby improving the air tightness and corrosion resistance of the ceramic device.

The application discloses a collophanite reverse flotation process applied to yield improvement, and the process is characterized in that flotation reagents are sequentially added into phosphorite slurry and then introduced into roughing operation, roughing is carried out, and rough concentrate and foam product I are obtained; the foam product I is introduced into one-stage scavenging after adding an adjusting agent, and scavenging concentrate I and foam product II are obtained; the scavenging concentrate is reselected after adding flotation reagents, and reselected concentrate and foam product III are obtained; the reselected concentrate and the rough concentrate are mixed and then introduced into cleaning after adding flotation reagents, and final concentrate and foam product IV are obtained, and the foam product IV is returned to the roughing operation; the foam product III is mixed with the foam product II, and two-stage scavenging is carried out, and scavenging concentrate II and foam product V are obtained, the foam product V is final tailings, and the scavenging concentrate II is returned to the one-stage scavenging operation. The process is stable, simple and efficient, has strong adaptability to ores, and has low phosphorus content of tailings and higher phosphorus yield.

This invention belongs to the field of iron and steel metallurgy technology, specifically relating to molten steel for chromium addition in a converter for low-carbon chromium steel production. In conventional alloy steel smelting processes using high-carbon ferrochrome for alloying, the carbon content in the molten steel obtained after secondary slag formation easily exceeds the upper limit, making it difficult to obtain low-carbon chromium steel with a carbon content below 0.15% after subsequent alloying processes. To address this problem, this invention provides molten steel for chromium addition in a converter for low-carbon chromium steel production. To improve the chromium recovery rate in low-carbon chromium steel and prevent the carbon content in the molten steel obtained after secondary slag formation from exceeding the upper limit, this invention adds a small amount of chromium concentrate during the secondary slag formation process and continuously blows oxygen from the top during the secondary slag formation process. This significantly reduces the carbon content in the molten steel obtained after secondary slag formation while simultaneously improving the chromium recovery rate.

The invention discloses a composite microbial preparation and application thereof in treatment of mariculture wastewater, and relates to the technical field of microbial agents. According to the preparation method, bacillus velezensis, halobacillus dakamoyi and Starproteia are used as fermentation strains, fermentation is performed to obtain a fermentation bacterial liquid, and then gamma-polyglutamic acid, sodium alginate and calcium chloride are utilized to perform immobilization treatment on the fermentation bacterial liquid to prepare the compound microbial preparation. The prepared composite microbial preparation is added into the mariculture wastewater, so that the total nitrogen content, the total phosphorus content and the COD content in a water body can be effectively reduced, the efficient treatment of the mariculture wastewater is realized, and the water quality stability is improved. Wherein the bacillus velezensis, the halobacillus dakamoyi and the Starproteinia are combined for use, and a synergistic effect on reducing the removal efficiency of total nitrogen in the mariculture wastewater is achieved.

This invention discloses a green production method for biodiesel. First, pretreated feedstock oil and methanol are preheated and then fed into a reactor loaded with a superhydrophobic polymer solid acid catalyst for esterification. After oil-water separation, the oil phase is then fed into a reactor loaded with a macroporous strong-base ion exchange resin for transesterification. The biodiesel product is collected by vacuum distillation. The biodiesel production method provided by this invention has strong feedstock adaptability, no wastewater discharge, and excessive energy consumption. Methanol can be recycled, resulting in high feedstock utilization and product quality. Furthermore, the catalyst is simple to prepare, the reaction rate is fast, and the active phase is not easily lost.

The method for improving the content of vanadium in converter vanadium slag disclosed by the embodiment of the application comprises the following steps: S1, vanadium-containing molten iron is blown oxygen smelted in a converter by adding a dephosphorizing agent and a cooling agent to obtain molten vanadium slag and semi-steel; wherein the P content in the semi-steel is lower than 0.005wt%; the CaO content in the molten vanadium slag is greater than 5wt%, and the P content is greater than 0.05wt%; S2, a high-valence oxide-containing material is added into the obtained molten vanadium slag, CO2-O2 gas is introduced for stirring, and reaction is carried out at a set temperature; during the reaction, the reaction process is synergistically strengthened by using ultrasound, microwave and a magnetic field, and a magnetic vanadium spinel and a molten silicate mixture are obtained by the reaction; the content of the magnetic solid vanadium spinel is 20-100wt%; S3, the magnetic vanadium spinel and the molten silicate mixture are separated under the condition of a magnetic field to obtain the magnetic vanadium spinel and the molten silicate, respectively.

The utility model relates to the technical field of circulating water treatment, and particularly discloses an electrolytic bath based on electrochemical descaling, which comprises a processing box body, a groove is arranged on the surface of the processing box body, an upper sealing cover is arranged on the upper surface of the processing box body, and an electrode group is fixedly connected with the bottom surface of the groove of the processing box body. A power module is fixedly installed on the lower surface of the machining box body, an electromagnetic generator is arranged on the outer surface of the machining box body, and a magnetic field distributor is installed on the outer surface of the machining box body. The electrolytic bath based on electrochemical descaling is provided with the electrode group and the electromagnetic generator, so that when the electrolytic bath works, through a titanium-based coating anode and a stainless steel cathode of the electrode group, periodic automatic electrode reversing is performed, polarization is prevented, hydrogen ions and active oxygen are generated during electrolysis, a calcium carbonate or magnesium scale layer is reduced and dissolved, and ion crystallization is interfered through an electromagnetic frequency mixing field; and finally, suspended matters are adsorbed through the medicament.