11results about How to "Reduce purification costs" patented technology

The application discloses a kind of purification equipment of ultra-high purity quartz sand and its purification method, including immersion washing tank, the rotating drum is equipped in the immersion washing tank, the rotating drum is opened with door, motor is fixed on the immersion washing tank side plate on rotating drum side, the output shaft of motor is fixedly connected with the side of rotating drum and the side of immersion washing tank, the sealing upper plate is slidably connected on the immersion washing tank;By immersion washing tank, it can realize soaking cleaning and spraying effect by rotating drum, and double purification is carried out on quartz sand;By immersion washing tank, mixing box and sedimentation tank, acid liquid circulation is realized, resource is saved, and purification cost is reduced;By heating pipe on sealing upper plate and the PH tester that is equipped in the inside of immersion washing tank, mixing box and sedimentation tank, the temperature and PH value of acid can be effectively controlled, so that the concentration and PH value of acid always meet the requirement of quartz sand purification, temperature and concentration are strictly controlled, and high-purity purification of quartz sand is realized.

The invention discloses an in-situ leaching liquid injection system and method for high-altitude ionic rare earth ore, and belongs to the field of rare earth hydrometallurgy. The system is composed of a liquid injection well pattern, a layered liquid injection device, a first liquid supply system, a second liquid supply system and a collection system. Exploring the thickness of an ore body weathering crust and vertical distribution of rare earth / impurities; the liquid injection hole is vertically divided into an upper layer liquid injection area (1 / 3-1 / 2 of the upper part) and a lower layer liquid injection area (1 / 2-2 / 3 of the lower part); a 1.0-1.4 wt% low-concentration diethylenetriamine-ammonium acetate composite leaching agent is injected into the upper layer, and co-leaching of impurities such as aluminum and iron is reduced; 1.5-2.5 wt% of high-concentration diethylenetriamine-ammonium acetate composite leaching agent is injected into the lower layer to ensure efficient leaching of rare earth; and rare earth-rich leaching liquid is collected. Compared with a traditional full-layer high-concentration process, the method has the advantages that the use amount of a leaching agent is reduced by 20-40% while the rare earth leaching rate is kept to be larger than or equal to 90%, the aluminum ion concentration of the leachate is reduced by 30-60%, the agent cost and the follow-up impurity removal load are remarkably reduced, and the method is particularly suitable for the high-altitude, low-temperature, low-air-pressure and thick-weathered crust environment.

This invention discloses the application of a Ni-based catalyst in the anti-CO poisoning hydrogenation reaction of a liquid organic hydrogen support, aiming to solve the technical problem of CO poisoning in existing LOHC hydrogenation catalysts. It uses CO-containing crude hydrogen as the hydrogen source to achieve the hydrogenation reaction. The Ni-based catalyst has an M / Ni reverse-phase structure, using hydrogen-dissociated metallic Ni as the support, and loading nano-metal oxide M as the supported phase to construct reverse-phase interfacial active sites. The metal M is a combination of Zr and Al, with the molar fraction of the supported phase metal M ranging from 10% to 25% based on 100% of all metals in the catalyst. The catalyst preparation method of this invention is simple and easy to implement, possessing a non-traditional supported reverse-phase structure. When applied to the anti-CO poisoning hydrogenation reaction, it exhibits superior activity compared to traditional supported catalysts. Furthermore, the reaction system is clean, safe, and reproducible, allowing for effective recycling and making it suitable for industrial production, showing promising application prospects.

The application discloses a zinc powder automatic control method, device and system for antimony salt purification process, which comprises the following steps: constructing a copper and cobalt removal fitting model, calculating the optimal potential setting value by using a particle swarm algorithm and setting the potential setting value; updating the potential setting value by using a fuzzy algorithm and a case reasoning method; constructing a three-dimensional fuzzy rule according to the difference between the current potential measurement value and the potential setting value, generating a zinc powder adjustment amount, adding the current zinc powder addition amount to obtain a new zinc powder amount setting value, writing the new zinc powder amount setting value into a DCS system on line, and controlling the automatic feeding device to add zinc powder. The above steps are repeated to achieve stable potential control and realize the minimum zinc powder consumption. The zinc powder automatic control method for the antimony salt purification process, which automatically adjusts the zinc powder addition amount according to the potential fluctuation, realizes accurate control of the zinc powder addition amount, effectively reduces the zinc powder consumption in zinc hydrometallurgy, and reduces the production cost in the antimony salt purification process.

This application discloses a multi-module combined aquaculture water purification method and system, relating to the field of water purification technology. The method includes: acquiring the rated aquaculture load and module distribution information of multiple aquaculture modules; determining the initial connection topology between the multiple water purification modules through a priori empirical model; collecting real-time monitoring data from the multiple aquaculture modules and calculating the real-time water quality load; optimizing water purification parameters based on simulation analysis; and controlling the aquaculture water purification in the target scenario based on the optimized water purification parameter results. This solves the technical problem of traditional aquaculture water purification methods being unable to dynamically adjust according to the actual load and distribution characteristics of different aquaculture modules, leading to low purification efficiency.

The invention discloses a preparation method of a carbon dioxide hydrogenation reaction catalyst. The preparation method of the oxygen carrier comprises the following steps: placing one or more of particles manually loaded with a copper element or natural ore particles and blank alumina pellets in a fluidized bed reactor according to a ratio, introducing methane gas, and jointly fluidizing at 600 DEG C for 2 hours; and after the reaction is finished and cooling, introducing nitrogen, and adjusting the gas speed until particles are layered to obtain the product catalyst. According to the method, inert particles which are originally wasted in the chemical looping combustion industry can become core components for preparing the catalyst, a special carrier does not need to be additionally purchased, the raw material cost of the catalyst is remarkably reduced, active elements on the surfaces of the prepared particles are uniformly loaded, the wear rate is smaller than 0.2% / h, and the method is a catalyst preparation method oriented to industrial application.

This invention relates to the field of organic compound preparation technology, specifically a method for preparing 11-triglycerides of carbonate via low-temperature acylation. This method uses glycerol and undecanoyl chloride as raw materials, employing a synergistic system of a "composite acid-binding agent + Lewis acid catalyst," and combines in-situ dehydration technology and a stepwise heating strategy in a dual-solvent environment to achieve efficient synthesis. The specific steps include: under nitrogen protection, dissolving glycerol in a dichloromethane-toluene dual solvent, adding a composite acid-binding agent of pyridine and N,N-diisopropylethylamine, anhydrous zinc chloride catalyst, and 4A molecular sieve for in-situ dehydration; dropwise adding undecanoyl chloride at a low temperature of 5-10°C, followed by sequential heating to 30°C for 2-3 hours and then reacting at 50°C for 12-16 hours; and post-processing using a combined process of filtration-multi-stage extraction-membrane separation-column chromatography. This invention provides mild reaction conditions, effectively suppresses side reactions, produces high-purity products, increases molar yield, and reduces solvent toxicity and purification costs.

The invention belongs to the field of biotechnology and enzymology, and particularly relates to a thermostable variant of MDH and application thereof. The amino acid sequence of the mutant is shown as any one of SEQ ID NO: 1 to SEQ ID NO: 23. The catalyst has a normal MDH catalysis function and shows high temperature stability. The thermal stability variant of MDH provided by the invention can be used for replacing traditional MDH to be applied to clinical diagnostic reagents, cold-chain transportation and low-temperature storage are avoided, the cost is reduced, and the shelf life is prolonged.

The invention discloses a mixture purification and separation process and equipment based on melt crystallization, which comprises the following steps: feeding a crude product material into a crystallization purification device through a crude product storage tank to obtain a high-purity target crystal and a low-purity mother solution; the low-purity mother liquor is fed into a mother liquor storage tank to serve as a material to be purified again; the crystals with higher purity are subjected to countercurrent washing in the crystallization purification device, and impurities on the surface layer are melted and taken away to obtain a high-purity target crystal product; and melting the high-purity crystal to obtain a liquid product or granulating to obtain a solid product. A crude product is conveyed to a second crystallization area through a raw material pump and then is in contact with a cold material to be crystallized and separated out, and a solid falls to a third crystallization area; and the crystals passing through the washing area enter the melting area to be melted, and the melted liquid part is extracted, so that a high-purity product can be obtained.

This invention belongs to the field of heterocyclic pharmaceutical intermediate synthesis technology, specifically disclosing a method for synthesizing N-alkoxycarbonyl-4-amino-4-alkylpiperidine. Using N-alkoxycarbonylpiperidine-4-carboxylate as the starting material, the target product is obtained through a four-step reaction involving alkylation, hydrolysis, amidation, and Hoffmann rearrangement. This invention, through the adaptation and control of the substrate, synthetic route, and synthetic conditions, can solve the problems existing in the substrate-based synthetic route, thereby improving product yield and quality. The method described in this invention achieves a total yield of ≥60% of the target product, with key impurities all <0.1%. The process is safe and controllable, suitable for both laboratory-scale and industrial-scale production.

The invention relates to the technical field of medicines, in particular to a synthesis method of an antibiotic Clovibactin. According to the method disclosed by the invention, efficient and controllable preparation of the antibiotic Clovibactin can be realized, the problems of production stability and large-scale production are solved, the consistency and repeatability of product batches are ensured through determined chemical reaction steps and conditions, and a foundation is laid for large-scale standardized production.