31 results about "Industrial utilization" patented technology

The invention discloses a method for leaching valuable elements in silicate rare earth ore, and belongs to the technical field of rare earth metallurgy. According to the method, the valuable elements in the rare earth concentrate are efficiently leached by adopting the processes of low-temperature sulfating intensified roasting, clinker hydrometallurgy, leached ore pulp flocculation and filter cake washing. The strengthened low-temperature sulfating roasting process avoids the problems of high energy consumption, serious equipment corrosion, low rare earth leaching rate and complex waste gas treatment (SO2 escape) of a traditional process, meanwhile, silicate rare earth ore decomposition is achieved, the effect of a back-end leaching process is remarkably improved, compared with an acid pickling process, the hydrometallurgy process reduces the acid consumption and the wastewater treatment difficulty, and the production cost is reduced. The leaching ore pulp flocculating settling process is beneficial for improving the industrial production efficiency, the filter cake washing process is beneficial for further improving the leaching rate of valuable elements, the silicate rare earth ore concentrate resources are utilized to the maximum extent on the premise of being environmentally friendly, and a technical path is provided for industrial utilization of silicate type rare earth ore.

The application relates to a preparation method of 2-amino-6-hydroxypyridine compounds and intermediates thereof, and belongs to the field of organic synthesis. The preparation method of the 2-amino-6-hydroxypyridine compounds comprises the following steps: 1) in a first organic solvent, compound II is reacted with a cyclic acid anhydride reagent A to prepare compound III; 2) in a second organic solvent, in the presence of an oxidizing reagent, compound III is subjected to an oxidation reaction to prepare compound IV; 3) in a third organic solvent, in the presence of an acid anhydride dehydrating reagent, compound IV is subjected to a reaction to prepare compound V; 4) in a fourth solvent, in the presence of a reducing agent, compound V is subjected to a reduction reaction to prepare compound I; and compound I is a 2-amino-6-hydroxypyridine compound. The preparation method of the 2-amino-6-hydroxypyridine compounds provided by the application can obtain a higher yield through mild reaction conditions, and is simple and convenient to operate, and is beneficial to industrial utilization.

This invention discloses an artificial breeding method for *Schizothorax lancensis*, belonging to the field of aquatic animal breeding technology. The artificial breeding method for *Schizothorax lancensis* provided by this invention includes: intensive three-step cultivation of broodstock, injection of spawning induced agents after cultivation, artificial fertilization, hatching of fertilized eggs, and fry cultivation. Using the artificial breeding method of this invention, the success rate of spawning induction in female *Schizothorax lancensis* is 83.3%, the average fertilization rate is 87.5%, the average hatching rate is 93.0%, and the average fry emergence rate is 91.5%. This achieves large-scale artificial breeding of *Schizothorax lancensis*, laying the foundation for preventing the extinction of *Schizothorax lancensis*, and for carrying out the propagation and release of *Schizothorax lancensis* for industrial utilization.

The application discloses an amorphous metal oxide-carbon composite material and application thereof in electrocatalytic oxygen reduction synthesis of H2O2, wherein the amorphous metal oxide-carbon composite material comprises porous carbon PC and amorphous metal oxide MO loaded on the porous carbon x The amorphous metal oxide-carbon composite material has excellent catalytic activity, double-electron ORR selectivity and long-time durability. Moreover, the preparation method of the amorphous metal oxide-carbon composite material has a simple technological process, the amorphous characteristic of the obtained metal oxide is extremely innovative, raw material cost is low, and the amorphous metal oxide-carbon composite material is beneficial to regulation and control, and is favorable to popularization of large-scale industrial utilization of electrocatalytic oxygen reduction preparation of H2O2.

The present invention relates to novel rebaudioside D and rebaudioside M-like steviol glycosides and a method for producing same. The novel rebaudioside D and rebaudioside M-like steviol glycosides obtained by the production method according to the present invention exhibit improved water solubility, and thus can be easily applied to beverages and foods with a high water content, and can significantly improve the industrial utilization of steviol glycosides.

The embodiment of the application relates to a low-density molded packaging product plant fiber material taking coconut fiber as raw material and a preparation method and application thereof, and belongs to the technical field of fiber packaging materials. The preparation method of the low-density molded packaging product plant fiber material taking coconut fiber as raw material comprises the following steps: step one, pretreatment; step two, chemical immersion; step three, grinding separation; step four, high-concentration immersion waste liquid extraction and impurity removal; and step five, fine grinding treatment. The fiber material provided by the embodiment of the application can improve the performance of molded products, further expand the application range of molded products, expand the industrial utilization range of characteristic plant fiber raw materials, improve the industrial utilization added value, reduce the dependence of the molded industry on paper pulp raw materials for papermaking, and relieve the pressure of insufficient paper pulp supply.

The utility model provides an RTO (Regenerative Thermal Oxidation) system suitable for high-concentration waste gas treatment, which comprises a regenerative oxidation furnace, a buffer tank and a detection unit, the gas outlet end of the buffer tank is connected with a combustion chamber in the heat accumulating type oxidation furnace after sequentially passing through a double-stop valve, a nitrogen purging device, a one-way valve and a flame arrester; the detection unit is arranged on the high-concentration waste gas inlet pipeline, and the detection unit and the double stop valves are in interlocking control. According to the RTO system, the oxygen content and the waste gas concentration in high-concentration waste gas can be monitored in real time through the detection unit, it is ensured that the oxygen content in the waste gas is lower than 2%, and the VOC concentration is lower than 25% or 20% of the minimum explosion lower limit, so that safety accidents such as explosion are effectively prevented, the whole RTO system can automatically adjust the operation mode according to the oxygen content, and the operation efficiency is improved. Manual intervention is reduced, the automation degree and operation stability of the system are improved, energy conservation, environmental protection and efficient operation are achieved, and the industrial utilization value is high.

This invention discloses an optimized method for a highly efficient fragmentation process of desert algae with high retention of active ingredients. The invention uses cell disruption rate, chlorophyll retention rate, and polysaccharide retention rate as core evaluation indicators, focusing on key parameters of the high-pressure homogenization fragmentation process (fracture pressure, fragmentation time, and algal liquor mass fraction). Effective ranges for these parameters are screened through single-factor experiments, and a multivariate synergistic regression model is constructed using response surface methodology to accurately predict the fragmentation effect and the retention rate of active ingredients. Experimental verification shows that the model has excellent fit; under optimal process conditions, the desert algae fragmentation rate is ≥91.5%, the chlorophyll retention rate is ≥76.9%, and the polysaccharide retention rate is ≥72.4%, significantly superior to existing ultrasonic fragmentation and enzymatic hydrolysis processes. This invention has advantages such as simple operation, high fragmentation efficiency, minimal loss of chlorophyll and polysaccharides, and high accuracy in predicting results. The fragmented products can be directly used in the development of desert algae fertilizers and other products, providing key technical support for the efficient industrial utilization of desert algae resources.

The present application relates to a kind of subsurface multi-parameter nanometer standard sample plate and its preparation method, including X tracking mark for locating and looking for calibration position, Y tracking mark and alignment mark, Z step calibration area for calibration, one-dimensional grid calibration area and two-dimensional grid calibration area, when using a kind of subsurface multi-parameter nanometer standard sample plate of the present application to carry out instrument calibration, current position can be quickly distinguished and positioned to the region to be measured by tracking mark and alignment mark, it can be used for the calibration and traceability of subsurface measuring instrument such as confocal microscope, white light interference microscope, ultrasonic atomic force microscope, provide guarantee for the accuracy of value in subsurface geometric parameter measurement, help the development of strategic emerging industries such as semiconductor, precision manufacturing, national defense and military industry, with high industrial utilization value.

The invention discloses a biocontrol bacillus amyloliquefaciens WYP1-4 for degrading feathers and application thereof, and belongs to the technical field of microorganisms. The bacterial strain is classified and named as bacillus amyloliquefaciens WYP1-4, and is preserved in the Guangdong Microbiological Culture Collection Center, the preservation number is GDMCC No.65114, and the preservation address is the 5th floor, No.59 floor, Institute of Microbiology, Academy of Sciences, Guangdong Province. The feather degradation rate of the strain reaches 93% (28 h), and the strain has high industrial utilization value and has a good antagonistic effect on tea tree pathogenic bacteria pestalotiopsis pseudomonas CLBB1 and aspergillus niger YC01.

The invention relates to the field of food microorganisms, and particularly discloses a bacillus pumilus T1-11 strain and an application of the bacillus pumilus T1-11 strain. The bacillus pumilus T1-11 is preserved in the China General Microbiological Culture Collection Center on January 10, 2025, and the preservation number is CGMCC NO.33025. The bacillus pumilus T1-11 has the characteristic of producing glutaminase, and can metabolize glutamine to generate glutamic acid; in addition, the strain T1-11 can also resist a salt environment, and the generated glutaminase can keep enzyme activity under the conditions of higher temperature and higher salinity. The bacillus pumilus T1-11 is further applied to soy sauce fermentation, the content of glutamic acid, isovaleraldehyde and amino nitrogen in soy sauce can be increased, and the delicate flavor of fermented food such as soy sauce can be improved. The bacillus pumilus T1-11 disclosed by the invention has an important industrial utilization value and a wide application prospect in the aspects of producing glutaminase and improving the delicate flavor of fermented foods.

The invention relates to a waste power battery black powder in-situ pyrolysis PVDF (Polyvinylidene Fluoride) fluorine fixation method, which comprises the following steps: performing pyrolysis treatment on waste power battery black powder in a mixed atmosphere of ammonia gas and oxygen; gas generated in the pyrolysis treatment process is absorbed, and fluorine fixation is achieved; the temperature of the pyrolysis treatment is 260 DEG C to 350 DEG C. According to the method provided by the invention, the mixed gas of ammonia gas and oxygen is used, so that the pyrolysis treatment temperature can be effectively reduced to 260-350 DEG C, and the energy consumption is reduced; the ammonia gas can be combined with HF generated by pyrolysis treatment to generate NH4F, so that the purpose of fixing fluorine is achieved; the produced NH4F has high industrial utilization value, and the economical efficiency of fluorine fixation is improved.

The application provides a ship CO2 hydrate capture system and method using waste heat energy and osmotic energy. The system comprises: a tail gas pretreatment module for sequentially performing cooling treatment, oxidation dust removal treatment and desulfurization and denitrification treatment on ship tail gas; a waste heat energy-osmotic energy power generation module for storing electric energy generated by organic Rankine cycle waste heat power generation and osmotic power generation; a hydrate method carbon capture module for bubbling and strengthening CO2 hydrate generation of flue gas after the tail gas pretreatment module, and forming hydrate slurry after CO2 hydrate accumulation, wherein a part of the hydrate slurry is subjected to CO2 capture, heating and pressure relief decomposition to produce purified water, and pure CO2 gas and purified water are obtained; another part of the hydrate slurry is subjected to filtration to obtain CO2 hydrate solid and storage; a CO2 transfer, utilization and storage module is used for directly storing the pure CO2 gas and the CO2 hydrate solid into the ocean or geology, or transporting the pure CO2 gas and the CO2 hydrate solid to downstream users for industrial utilization or biological utilization.

This invention provides a method for low-temperature water extraction of gallnut leaves, comprising the following steps: first, crushing the raw material to obtain gallnut leaf powder; mixing the gallnut leaf powder with pre-cooled purified water to form a liquid; adjusting the pH of the liquid at low temperature and then extracting; separating the solid and liquid at a low temperature of 5-18°C to remove waste residue and obtain a refined extract; further concentrating and purifying the refined extract to obtain a tannin extract. This method for low-temperature water extraction of gallnut leaves improves the comprehensive utilization rate of raw materials, simplifies the production process, reduces production costs, and improves production efficiency. It is suitable for the high tannin content of leaves from *Populus tomentosa* and *Populus thunbergii*, enabling the efficient and green industrial utilization of these raw materials.

The invention discloses an Apertus pallidofulvus Z-12 strain which is preserved in the Guangdong Microbial Culture Collection Center (GDMCC) on July 2, 2025, and the preservation number of the Apertus pallidofulvus Z-12 strain is GDMCC No: 66621. The Apertus pallidofulvus Z-12 strain is named as Apertus pallidofulvus Z-12 strain. According to the invention, several strains are separated from naturally stored tea seed meal, fresh tea seed meal is inoculated for fermentation, and in combination with an alpha-glucosidase inhibition rate, a new strain Aperbacillus pallidofulvus Z-12 for high yield of hypoglycemic active matters from fermented tea seed meal is screened and identified. Meanwhile, the Z-12 strain and the protease are innovatively and synergistically fermented under the optimal process condition, and the quality of the blood sugar reducing active matter in the tea seed meal is remarkably improved. The technology not only fills the technical blank of efficient utilization of high-quality protein of the tea seed meal, but also provides a brand new thought for industrial utilization of the tea seed meal.

The invention provides a steam pipeline drainage point arrangement method and system, a medium and a terminal.The arrangement method comprises the steps that basic information is extracted from a pipeline model of a steam pipeline, then drainage points are preliminarily set according to the basic information of the pipeline model, and then the similar drainage points are combined according to the corresponding arrangement principle; and obtaining a final hydrophobic point position. In addition, the genetic algorithm is used for carrying out cross combination on different arrangement schemes, so that various situations of the hydrophobic points at different positions are fully considered, and the optimal hydrophobic point arrangement scheme is obtained. According to the drainage requirement of the steam pipeline, the positions of the drainage points are represented through a series of data sets according to the drainage point arrangement principle and priority of the steam pipeline, convenience and simplicity are achieved, optimization can be conducted according to the drainage capacity of the system and the number of the drainage points, and the drainage point arrangement efficiency and accuracy are improved. Therefore, the invention effectively overcomes various defects in the prior art and has industrial utilization value.

The application relates to an LNG cold energy cascade utilization and multi-network collaborative optimization method based on liquid air energy storage, and belongs to the field of energy system engineering. A deep coupling model of LNG cold energy and liquid air energy storage (LAES) is constructed, and LNG cold energy is used to replace a traditional electric refrigeration link; a cold energy multi-stage recovery process covering power generation, refrigeration and industrial utilization is designed; an LAES scheduling model considering the peak-valley characteristics of an electric network and a multi-period electric-gas-cold multi-energy flow collaborative optimization framework are established; mixed integer linear programming and a multi-objective optimization algorithm are used for solving; system comprehensive evaluation based on exergy analysis and heat integration is carried out; dynamic operation parameter optimization based on sensitivity analysis is implemented; and an integrated control and adaptive control system based on a real-time model is deployed. The application realizes comprehensive utilization of LNG cold energy, economic scheduling of an energy storage system and stable collaboration of multi-energy networks, and significantly improves energy utilization, system economy and operation flexibility.

The application relates to the field of food processing and discloses a synbiotic fermented donkey milk beverage and a preparation method thereof. The method takes freeze-dried donkey milk powder as raw material, adds water to a mass fraction of 12% for re-dissolution, adds a compound probiotic accounting for 4% of the total mass of the donkey milk liquid, uniformly mixes, homogenizes at 20 MPa for 40 s, sterilizes at 95 DEG C for 10 min, inoculates 3% mixed probiotic powder after the material liquid is cooled to 42 DEG C, and ferments at 42 DEG C for 7 h to obtain a fermented milk base. The base is diluted with distilled water at a mass ratio of 1:3, 6% sucrose and 0.4% food stabilizer are added and uniformly mixed, the mixture is subjected to secondary homogenization at 20 MPa and secondary sterilization at 95 DEG C for 15 min, and then the mixture is cooled to room temperature to obtain the synbiotic fermented donkey milk beverage. The application solves the problems of easy stratification and sedimentation, prominent fishy and rancid odor of natural donkey milk in the prior art, simultaneously makes up for the defects of low digestion utilization rate and insufficient functional activity of the product, and improves the high added-value industrial utilization level of donkey milk resources.

The invention discloses a preparation method and an application of a MoS2 coated red mud based composite material BR-MoS2. The MoS2 coated red mud based composite material BR-MoS2 is prepared The preparation method of the composite material comprises the following steps: S1, carrying out acid activation treatment on the red mud; s2, constructing a BR-MoS2 precursor solution by using the red mud in the S1; and S3, carrying out hydrothermal reaction on the precursor solution constructed in S2, and carrying out centrifugal cleaning to obtain the BR-MoS2 composite material. Compared with the prior art, the preparation method disclosed by the invention has the advantages that the MoS2 semiconductor material is coated on the surface of the red mud BR by utilizing a hydrothermal method; the stability of the red mud in the photocatalytic degradation process can be ensured through coating growth of MoS2 on the surface of the red mud; moS2 can broaden the absorption of the visible light region of the BR-MoS2 composite material; the composite growth MoS2 is a typical piezoelectric material and can induce an induced polarization electric field under the action of an ultrasonic field, a mass transfer mechanism in a photodegradation reaction process is coupled and enhanced, and the efficiency of photodegradation of organic pollutants is enhanced, the solvothermal method used in the invention is simple and low in consumption, the synthesis cost of a photocatalyst material can be greatly reduced, and the preparation method is suitable for industrial production. And the method has great industrial utilization value.

The present disclosure provides a water heating system for efficient heating of water for immediate use that fits either to industrial applications or household applications. The water heating system is suitable to be combined with a solar heating unit and it can be operated on electric power or on gas-based heating units for providing hot water to multiple consumers for household or industrial utilization. Furthermore, the system can be stand-alone, operating without any additional water heating system and can provide an immediate stream of hot water, e.g. it can be installed within a water supplying appliance. The water can operate in two modes: (1) heating for immediate use of hot water; and (2) heating water to be contained in a reservoir for later use. The system uses a two (bi) directional flow valve.

The utility model relates to the technical field of low-rank coal pyrolysis exhaust gas, in particular to a low-rank coal pyrolysis exhaust gas recycling device which comprises a recycling shell and further comprises a gas inlet pipe fixed in the recycling shell, and one side of the bottom of the recycling shell is fixedly connected with a connecting shell. An air inlet pipe is connected with an air discharging pipe, then a first pump head is opened to pump cooling liquid in a water cooling box into an annular cooling pipe to cool the surface of the air inlet pipe, meanwhile, three sets of blowing fans are matched for auxiliary cooling so as to reduce the temperature, and subsequent equipment is prevented from being damaged; then activated carbon and a dehumidizer in the partition shell and the discharging shell are matched to remove moisture in the gas, an adsorbent is matched to remove tar and other organic pollutants in the gas, then two filter plates are matched to finely filter the gas and then discharge the gas, and therefore it is ensured that the impurity content in the gas is low, and the industrial utilization requirement is met; therefore, dependence on traditional fossil fuel is reduced, and cyclic utilization of resources is promoted.

The invention discloses a grifola frondosa strain Grifola frondosa SiL91, which is preserved in China General Microbiological Culture Collection Center (CGMCC) on February 3, 2026, and the preservation number is CGMCC No. 42572. The grifola frondosa strain has the advantages that the preservation number is CGMCC No. 42572, and the preservation number is CGMCC No. 42572; meanwhile, the invention discloses a method for co-producing extracellular xylanase and cellulase through solid fermentation of the grifola frondosa strain. The invention discloses an application of a grifola frondosa strain for co-production of xylanase and cellulase in preparation of a product for degrading xylan and cellulose. According to the method, key culture media and conditions such as a carbon source and a nitrogen source in the culture process are optimized, strain metabolism and organic matter accumulation are improved, extracellular xylanase and cellulase are co-produced, and the enzyme yield is high. The strain provided by the invention has important value for industrial utilization of cellulase and xylanase resources.

The invention relates to a carbon dioxide trapping system. The system comprises a raw material cooler, a gas-liquid separation device, a compressor, a humidifying and condensing unit, a membrane separation unit and a product buffer tank, the humidifying and condensing unit comprises a membrane humidifying tower and a condensing device, and the condensing device is integrally arranged at the top of the membrane humidifying tower. According to the system, on one hand, pressurized flue gas is humidified and cooled in the humidifying and condensing unit in one step, the heat transfer efficiency is improved, the heat utilization efficiency of the technological process is improved, and the cooling capacity consumption of the technology is reduced; on the other hand, the route of wet CO2 saturated gas is shortened, corrosion and cracking of a process pipeline are avoided, the temperature change is small in the conveying process, the temperature loss is controllable, water is prevented from being condensed from the saturated CO2 gas in the conveying process, the inlet temperature required by membrane separation can be accurately achieved, the optimal separation condition of the membrane is achieved, and the membrane separation performance is excellent; the separation effect of subsequent membrane treatment is good, the technological process and operation are simple, and large-scale industrial utilization is easy to achieve.

The application discloses a boron-containing electrolyte salt and a preparation and application thereof, and the preparation method of the boron-containing electrolyte salt comprises the following steps: I, adding boric acid, A + HCO3 ‑ , and water into a reaction container, stirring and mixing, then adding salicylic acid, obtaining a boron-containing electrolyte salt reaction liquid after reaction, and obtaining a product, the boron-containing electrolyte salt, through post-treatment of the boron-containing electrolyte salt reaction liquid; the A + is a 1-ethyl-3-methyl imidazole cation or a 1,2,3,4-tetramethyl imidazoline cation. The boron-containing electrolyte salt can be applied to a capacitor electrolyte as an electrolyte additive. The application has the advantages that a novel boron-containing electrolyte salt structure which can be applied to a capacitor electrolyte as an electrolyte additive is provided, the boron electrolyte salt has a simple synthesis process route, mild reaction conditions, convenient operation, high product purity, high yield, and high industrial utilization value.

The invention provides an acidic copper barrier layer CMP polishing solution based on a compound surfactant and a preparation method of the acidic copper barrier layer CMP polishing solution. The polishing solution is prepared from, by mass, 1 wt%-10 wt% of grinding materials, 0.1 wt%-1 wt% of the surfactant, 0.04 wt%-4 wt% of additives and the balance pH conditioning agents and water, and the pH conditioning agents enable the pH value of the polishing solution to be 2-5; the surfactant is formed by compounding an anionic surfactant and a silane coupling agent according to a mass ratio of (1-5): 1. According to the polishing solution, good polishing selectivity of a copper layer, a silicon dioxide layer and a tantalum nitride barrier layer can be achieved, and the polishing rate of the polishing solution to the copper layer, the silicon dioxide layer and the tantalum nitride barrier layer can be adjusted by adjusting the proportion of a silane coupling agent and an anionic surfactant in the compound surfactant; and the polishing solution is widely applicable to polishing of various copper barrier layers and has good industrial utilization value.

The present application relates to a comprehensive utilization method of potassium-rich acid-insoluble substance, and belongs to the technical field of potassium ore processing. The present application solves the technical problem of providing a comprehensive utilization method of potassium-rich acid-insoluble substance. The method comprises the following steps: a, acidolysis: potassium-rich acid-insoluble substance is mixed with nitric acid and fluorosilicic acid, and reacted at 50-110 DEG C for 1-6h, and then solid-liquid separation is performed to obtain a potassium-containing filtrate; b, neutralization: the potassium-containing filtrate is mixed with potassium hydroxide, and then solid-liquid separation is performed to obtain a potassium nitrate solution and an aluminum hydroxide precipitate; c, crystallization: the potassium nitrate solution is crystallized to obtain a potassium nitrate product. The method provides an economic and green utilization route for potassium-rich acid-insoluble substance, has a high potassium leaching rate, and fully utilizes potassium and aluminum elements, so that all elements of the potassium phosphate ore are utilized, and the economic value of the potassium phosphate ore is increased. Meanwhile, the method provides a new utilization idea for potassium feldspar resources with similar components in China, has a mature industrial utilization, and is simple and low in cost.

This invention belongs to the field of mineral processing technology, and more specifically, relates to a method for removing impurities and upgrading potassium feldspar ore. The invention involves two-stage high-intensity magnetic separation of potassium feldspar ore to obtain a magnetic concentrate; after adjusting the magnetic concentrate to neutral, roughing reagents are added for roughing flotation to obtain a rough concentrate; after adjusting the rough concentrate to neutral, cleaning reagents are added for cleaning flotation to obtain a clean concentrate, thus completing the process of removing impurities and upgrading potassium feldspar ore. This invention utilizes a combined magnetic-flotation mineral processing method, using metal ions as one component of the flotation reagents. This effectively removes dark-colored, iron-rich impurities, reduces the amount of harmful elements such as iron, calcium, and magnesium, avoids the problem of black spots or surface roughness in potassium feldspar during calcination, and improves the whiteness value and industrial utilization value of low-quality potassium feldspar.

The application discloses a SpyCatcher immobilized mutant SpyFixer and application thereof. The mutant is obtained by introducing an A77E mutation site based on SpyDock. The mutant is respectively immobilized on a fiber biosensor, a hydrophilic epoxy agarose resin and a hydrophobic epoxy acrylate resin to obtain different carriers modified by SpyFixer, and then target proteins containing SpyTag are respectively immobilized on the different carriers modified by SpyFixer through Spy chemistry, and are used for protein interaction detection, immune detection, purification and immobilization. The mutant can be effectively immobilized on various types of carriers, and the immobilization efficiency and the binding activity after immobilization are superior to those of SpyCatcher and SpyCatcher003, and the application range is wider. Moreover, the proteins immobilized on the carriers modified by SpyFixer can be repeatedly used, and have potential industrial utilization value.

This invention provides a novel polysaccharide extracted from dried plum (Prunus mume), its preparation method, and its uses. The monosaccharide molar fraction in the Prunus mume polysaccharide is as follows: 0.5%-1.0 mol% fucose, 1.0%-2.0 mol% rhamnose, 35%-37 mol% arabinose, 15%-17 mol% galactose, 9.0%-11 mol% glucose, 2.0%-3.0 mol% xylose, 6%-8 mol% mannose, 23%-25 mol% galacturonic acid, and 1.0%-2.0 mol% glucuronic acid. The Prunus mume polysaccharide isolated and purified by this invention exhibits excellent antioxidant activity. Furthermore, based on the complex acidic heteropolysaccharide structure of the Prunus mume polysaccharide, especially its high proportion of uronic acid and branched structure, it possesses potential for various biological activities and has extremely high industrial utilization value.

A process may involve digesting raw phosphate with concentrated sulfuric acid and converting the raw phosphate to calcium sulfate in the form of dihydrate and / or hemihydrate, and phosphoric acid, separating off calcium sulfate as solid from a liquid phase of a suspension that is obtained, treating the calcium sulfate that is separated off or from a stockpile with an acid to give a suspension with purified calcium sulfate and P2O5-containing acid solution, separating off the purified calcium sulfate as solid from a liquid phase of a suspension obtained, using the P2O5-containing liquid phase as a portion of the sulfuric acid required for digesting the raw phosphate or as feedstock for treating phosphogypsum from the stockpile to give a suspension of purified calcium sulfate and P2O5-containing acid solution, which is thereafter processed.