6results 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 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.

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 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.