37 results about "Sodium product" patented technology

The present invention discloses a preparation method and production system for sodium nitroprusside. The preparation process comprises the following steps: first, reacting ferrocyanide with nitric acid to obtain a hydrogen nitroprusside aqueous solution; adding alcohol to the concentrated hydrogen nitroprusside aqueous solution to remove inorganic salts generated by the reaction, thereby obtaining a hydrogen nitroprusside alcohol solution; then, adding trisodium citrate to the hydrogen nitroprusside alcohol solution to react to obtain sodium nitroprusside and disodium citrate; separating and removing the citrate to obtain a sodium nitroprusside alcohol solution; and finally, concentrating, crystallizing, separating, and drying the sodium nitroprusside alcohol solution to obtain a sodium nitroprusside product. The present invention also provides a production system based on the preparation method. The production method of the present invention is simple to operate, operates under mild conditions, has a short production cycle, effectively prevents product oxidation, and has high purity. The obtained product is suitable for industrial production, and the production system requires less equipment and has low equipment requirements.

The invention belongs to the technical field of sodium bicarbonate preparation, and particularly relates to a method for preparing sodium bicarbonate through sodium waste salt resource conversion. In order to solve the problems of low yield and low purity of sodium bicarbonate, sodium chloride, sodium sulfate or a mixed salt of sodium chloride and sodium sulfate is used as a raw material and is subjected to double decomposition reaction with ammonium bicarbonate. After the reaction is finished, a sodium bicarbonate crude product and mother liquor are obtained through solid-liquid separation, sodium bicarbonate precipitation of the mother liquor is further promoted by adding a salting-out agent into the mother liquor, then the yield of sodium bicarbonate is increased, the used salting-out agent can be recycled, and the purity of the sodium bicarbonate product is improved in a washing mode. According to the method for improving the yield and purity of sodium bicarbonate prepared from sodium chloride / sodium sulfate, a feasible scheme is provided for resource utilization of industrial waste salt and high-salt wastewater.

The present application relates to aluminum ash resource utilization technical field, especially in kind with aluminum ash as raw material preparation sodium aluminate method.The method for preparing sodium aluminate with aluminum ash as raw material includes the following steps: S1, through sintering method, the aluminum ash tailings after harmless treatment is reacted with alkali to generate sodium aluminate clinker;S2, the sodium aluminate clinker is soaked with leaching solution, the dissolution temperature is 60-170 DEG C, solid-liquid separation, liquid is treated by precision filtration, and the precision filtrate is obtained;S3, the precision filtrate is concentrated by evaporation at 100-130 DEG C, and the concentrated solution is obtained;S4, the concentrated solution is crystallized at 40-80 DEG C, and the crystallization filtrate and sodium aluminate crystal are obtained by filtering, and the crystallization filtrate is diluted and used as leaching solution.The present application adopts crystallization method when preparing sodium aluminate with aluminum ash as raw material, which can not only effectively reduce the impurities in sodium aluminate product, but also can reduce energy consumption and improve the continuity of production.

The invention provides a heparin sodium product sampling device, and relates to the technical field of detection sampling devices, the heparin sodium product sampling device comprises a sampling barrel, a sampling nozzle, a piston and a drawing rod, the sampling nozzle is communicated with one end of the sampling barrel, the piston is slidably mounted in the sampling barrel, and one end of the drawing rod is fixedly connected with the piston; a plugging plate is fixedly installed in the sampling nozzle, a through hole is formed in the plugging plate in a penetrating mode, and the sampling nozzle is further provided with two plugging blocks. According to the heparin sodium product sampling device provided by the invention, the sampling barrel, the sampling nozzle, the piston, the drawing rod, the plugging plate, the two plugging blocks, the elastic reset structure and the adjusting structure are arranged, and an adjustable one-way valve structure is arranged in the sampling nozzle, so that when a sample is sampled or squeezed out, the position of the two plugging plates is adjusted; therefore, the sample is ensured to enter and flow out at the corresponding stage, the situation that the sample flows out of the sampling barrel in the storage or transfer process can be reduced, waste and pollution are reduced, and the accuracy of a detection result is ensured.

The present invention relates to a preparation method of pharmaceutical grade sodium dibutyryl adenosine cyclophosphate, comprising the steps of salt formation, acylation, refining, drying and the like. In the acylation process, a gradient program temperature rise method is adopted to accurately control the progress of the reaction, the reaction conversion rate is high, the side reaction is less, the impurity content of the finished product is extremely low, and a high-purity sodium dibutyryl adenosine cyclophosphate product is obtained. In the refining step, different solvents are used for multiple stirring and washing, and the organic solvents and impurities remaining in the purification and synthesis process of sodium dibutyryl adenosine cyclophosphate are effectively removed by centrifugation, thereby improving the purity of the product. The purity of the sodium dibutyryl adenosine cyclophosphate product prepared by the present invention can reach more than 99.5%. The preparation method of the present invention has simple process, mild reaction conditions, easy operation, stable process, good reproducibility, high total yield, and is more suitable for industrial production.

The invention belongs to the technical field of industrial wastewater resource utilization, and particularly discloses a vanadium precipitation wastewater resource utilization method which comprises the following steps: hydrogen peroxide oxidation: adding industrial-grade hydrogen peroxide into vanadium precipitation wastewater; adjusting pH: adding liquid caustic soda into the oxidized vanadium precipitation wastewater to obtain vanadium-containing precipitate and filtrate 1; recycling chromium: enabling the filtrate 1 to pass through an ultrafiltration membrane to obtain chromium-containing regenerated liquid and filtrate 2, and performing evaporative crystallization on the chromium-containing regenerated liquid to obtain a sodium dichromate dehydrate product; recycling ammonium sulfate: adjusting the pH value of the filtrate 2 to 4-4.5 by using sulfuric acid, and enabling the filtrate 2 to enter an evaporative crystallization system to obtain a concentrated solution 1, an anhydrous sodium sulfate product and a condensate 1; cooling the concentrated solution 1, and performing solid-liquid separation to obtain a sodium sulfate decahydrate product and a concentrated solution 2; according to the method, after the vanadium precipitation wastewater is treated, vanadium, chromium and ammonia resources in the vanadium precipitation wastewater are fully recycled; according to the method, no wastewater is generated, and a new way is provided for vanadium precipitation wastewater resource utilization.

The integrated fracturing flowback fluid brine resourceization process belongs to the technical field of fracturing flowback fluid treatment and high-salinity wastewater resourceization, and comprises the following steps: modifying nano-Fe3O4 by a silane coupling agent, and grafting the modified nano-Fe3O4 with polyacrylamide to prepare a composite flocculation material; making fracturing flowback fluid sequentially pass through oil removal by air flotation, advanced oxidation gel breaking, and then adding the flocculation material and an alkali agent for softening and precipitation, and obtaining a non-ultrafiltration-dependent pretreated clear liquid by multi-medium and precision filtration; adjusting the pH value of the clear liquid and adding a scale inhibitor, and then making the clear liquid pass through a multi-stage nanofiltration system to separate salts and intercept impurities, and the permeate is a dilute sodium chloride solution; the dilute liquid is concentrated by reverse osmosis at high pressure, clean water is recovered, and high-concentration sodium chloride brine is sent into a mechanical steam recompression evaporation crystallization system, and industrial-grade sodium chloride products are prepared by centrifugal drying, the present application avoids the membrane fouling problem that easily occurs when an ultrafiltration membrane is used to treat fracturing flowback fluid with high viscosity and high organic matter, and also simplifies the system configuration and improves the operation stability in the pretreatment stage.

The invention provides a large-particle sodium bicarbonate crystal product and a preparation method thereof, sodium chloride and ammonium bicarbonate are used as raw materials, a certain amount of additive is added into a NaCl solution to regulate and control the generation of large-particle sodium bicarbonate, and the large-particle sodium bicarbonate product is obtained through the steps of adding ammonium bicarbonate for reaction crystallization, cooling, filtering and drying. The additive is at least one of sodium dodecyl benzene sulfonate, lauryl sodium sulfate and sodium dodecyl sulfate. The large-particle sodium bicarbonate product is simple in preparation process, stable in process, low in energy consumption, high in economical efficiency, high in reproducibility and free of complex equipment. The one-time yield of the product reaches 60% or above, the cycle yield reaches 98% or above, and the purity of the product reaches 99.5% or above. The obtained large-particle sodium bicarbonate is spherical, and the particle size is large (D50gt; 300 [mu] m), the particle size distribution is uniform, the bulk density is high, the fluidity is good, and filtering and drying are easy.

The invention provides a preparation method and system of molten salt grade sodium nitrate, and belongs to the technical field of sodium nitrate preparation processes. The preparation method comprises the following steps: carrying out primary concentration and primary crystallization on a sodium nitrate mother solution, carrying out centrifugal separation to obtain an industrial-grade sodium nitrate product, dissolving the industrial-grade sodium nitrate product, carrying out secondary concentration and secondary crystallization, and sequentially carrying out centrifugal separation, primary drying, granulation, secondary drying and screening to obtain molten salt-grade sodium nitrate particles. According to the invention, through multiple evaporation and crystallization and strict temperature and pressure control, sodium nitrate which is high in purity and meets the molten salt grade quality standard can be produced; after the granulation process, the molten salt-grade sodium nitrate is improved in strength and can be stored for a long time to keep stable quality.

The preparation method comprises the following steps: firstly, adding solvent oil into a reaction kettle, adding humic acid raw powder according to the weight ratio of the solvent oil to the humic acid raw powder, and fully stirring to completely dissolve the humic acid raw powder; adding papermaking waste liquid dry powder into the reaction kettle according to the weight ratio of the humic acid raw powder to the papermaking waste liquid dry powder, then adding sulfur trioxide for sulfonation to generate a sulfonic acid group, then adding liquid caustic soda for neutralization to generate a sodium sulfonate group, testing the pH value, adjusting the pH value to 8-10, then adding industrial borax, heating to recover solvent oil, discharging, drying, crushing and packaging. The water-soluble sodium humate contains more sodium sulfonate groups, so that the water solubility of the sodium humate can be remarkably improved, the water solubility is extremely high, the dispersing and combining capacity is outstanding, the binding force with metal ions can be improved, and the chemical stability is higher. The use effect can be improved, the use range is enlarged, and the method is widely applied to petroleum drilling fluid, crops, aquaculture, feed, medical health care industry and the like.

The invention relates to the technical field of sodium ion battery electrode materials, in particular to a preparation method of a sodium ferrovanadium phosphate material. The preparation method comprises the following steps: S1, sequentially adding an iron source, a vanadium source, a phosphorus source, a sodium source and a carbon source into grinding equipment, and carrying out dry grinding; s2, in a protective atmosphere, carrying out gradient sintering on the dry powder raw material, firstly sintering at 350 DEG C, then sintering at 650 DEG C, and finally sintering at a temperature T which is greater than or equal to 780 DEG C and less than or equal to 950 DEG C; and S3, the sodium ferrovanadium phosphate material obtained through gradient sintering is subjected to graded crushing, and the sodium ferrovanadium phosphate material with large, medium and small three-level particle size distribution is obtained. According to the method, water or any organic solvent is not adopted, dry ball milling is directly adopted, the three-level particle size distribution sodium ferrovanadium phosphate product is obtained through a step-by-step grinding mode, a gradient sintering mode and a graded smashing mode, and the prepared sodium ferrovanadium phosphate product has the advantages of being high in compaction density and high in discharge capacity.

The application discloses a kind of electric field induction-iron ion embedding type iron sodium phaeophytin preparation method and device.The method includes plant raw material slurry, pulse electric field wall breaking extraction, saponification forms chlorophyllin precursor liquid, using three-cavity membrane separation electric field reactor carries out bipolar membrane in-situ demag, iron anode electrochemistry releases iron and migrates to central coordination reaction cavity by cation exchange membrane, completes embedding iron under the control of pulse electric field and oxidation-reduction potential, then is salted by sodium, microfiltration, ultrafiltration, electrodialysis desalination and drying to obtain iron sodium phaeophytin product.The device includes raw material slurry module, pulse electric field processing module, saponification reaction module, membrane separation electric field reaction module, salted by sodium module, purification module, drying module and central controller.The application process is continuous, iron supply is controllable, demag and embedding iron are closely coupled, and is suitable for industrial implementation.

The invention relates to a waste salt and waste activated carbon combined recovery method which comprises the following steps: mixing waste activated carbon, waste salt and alkali, and then sequentially crushing and calcining to obtain a calcined product containing sodium sulfide; sequentially performing dissolution and first solid-liquid separation on the calcined product to obtain a solution after dissolution; mixing the dissolved solution with acid for desulfurization reaction to obtain hydrogen sulfide gas and desulfurization mother liquor; carrying out alkali absorption on the hydrogen sulfide gas to obtain an absorption liquid; the absorption liquid is sequentially subjected to first evaporative crystallization and second solid-liquid separation, and a sodium sulfide nonahydrate product is obtained. The method can solve the problems of waste salt recovery and waste activated carbon treatment of the lithium battery, and realizes harmless treatment and resource treatment of solid wastes.

The present invention discloses a comprehensive dealkalization method for vanadium-extracting waste slag, which comprises mixing the vanadium-extracting waste slag with a calcium additive, a carbonaceous reducing agent and sodium nitrite to form a ball, adopting a roasting process to decompose the sodium-containing solid solution in the vanadium-extracting waste slag, and leaching the sodium-containing phase in the waste slag through a hydrothermal leaching process to achieve the purpose of dealkalization. The leached slag is dried to obtain a sodium-free iron-containing material, which is recycled for use in the ironmaking process, and the leaching liquid is subjected to multi-effect evaporation to form a sodium-containing product, which can be directly exported. The process equipment of the present invention is simple and easy to operate, and the vanadium-extracting waste slag can be recycled within the steel enterprise. At the same time, the process has high energy utilization, less environmental pollution, and low operation and maintenance costs, and can realize large-scale recycling of vanadium-extracting waste slag, with good economic and social benefits.

The application discloses a method for comprehensive treatment of condensation wastewater and by-product sodium butyrate, which comprises the following steps: pumping the condensation wastewater into an oxidation tank, and introducing ozone into the oxidation tank to oxidize butyl aldehyde and butanol in the wastewater into butyric acid, and neutralizing the butyric acid with sodium hydroxide in the wastewater to generate sodium butyrate; pumping the material liquid after the oxidation into a buffer tank; sending the wastewater in the buffer tank to a two-effect evaporator to evaporate and concentrate, and cooling the concentrated sodium butyrate to 45-47 wt.% to flow into a concentrated liquid storage tank; sending the steam generated in the evaporation into a wastewater tank after heat exchange and cooling; cooling and crystallizing the concentrated liquid in the concentrated liquid storage tank; pumping the slurry after the crystallization into a filter-dryer integrated machine to filter and dry, so as to obtain sodium butyrate products, and sending the filtrate into the wastewater tank; and pumping the remaining wastewater into a sewage treatment plant for biochemical treatment and discharge after reaching the standard. The application fully recycles the useful components in the condensation wastewater, by-product sodium butyrate products with high added value are obtained, resource waste is avoided to the maximum extent, the product structure of an enterprise is enriched, and considerable economic benefits are brought to the enterprise.

The present disclosure relates to chemical and non-ferrous metallurgy and can be used to treat alkaline aluminosilicate feedstocks by sintering to produce alumina and sodium products (soda, potash and potassium sulfate). The method of treating an alkaline aluminosilicate feedstock of the present invention comprises preparing a charge comprising nepheline ore, limestone, and a recovered soda alkaline solution and a reducing agent; coal is used as a process fuel sintering furnace material; and leaching the sinter, wherein the content of the reducing agent in the charge is 0.8-1.5 wt% of the weight of the dry charge. During the production of the charge, a recovered soda alkaline solution is added in an amount of 5.5-6.5 wt% R2O based on the weight of the dry charge, the charge is sintered at a temperature of 1, 245-1, 255 DEG C, the charge is sintered in a reducing atmosphere containing no less than 3 g / m3 of carbon oxide. The process allows for increased specific yields of alumina and sodium products and reduced specific fuel consumption.

The application provides a heparin sodium product sampling device, relates to the technical field of detection sampling devices, and comprises a sampling cylinder, a sampling nozzle, a piston and a pull rod, the sampling nozzle is communicated at one end of the sampling cylinder, the piston is slidably installed in the sampling cylinder, and one end of the pull rod is fixedly connected with the piston; a blocking plate is fixedly installed in the sampling nozzle, perforations are formed through the blocking plate, and the sampling nozzle is further provided with two blocking blocks. The application provides a heparin sodium product sampling device, the adjustable one-way valve structure is arranged in the sampling nozzle through the arrangement of the sampling cylinder, the sampling nozzle, the piston, the pull rod, the blocking plate, the two blocking blocks, the elastic reset structure and the adjusting structure, the positions of the two blocking plates are adjusted when sampling or sample extrusion, the entering and flowing out of the sample are ensured at the corresponding stage, the flowing out of the sample from the sampling cylinder during storage or transportation can be reduced, waste and pollution are reduced, the accuracy of detection results is ensured, and the like.

The application discloses a sodium acetate and sodium acetate trihydrate production device, which comprises a reaction system, an evaporation system, a crystallization system and a drying system. The reaction system is used for reacting sodium hydroxide solution and acetic acid solution to generate sodium acetate solution. The evaporation system is connected with the reaction system and is used for evaporating and concentrating the sodium acetate solution. The crystallization system is connected with the evaporation system and is used for crystallizing the sodium acetate solution after evaporation and concentration to prepare sodium acetate trihydrate. The drying system is connected with an outlet pipeline of the filter, and is used for drying the solid in the sodium acetate solution after evaporation, concentration and dehydration and the solid of the sodium acetate trihydrate after crystallization and filtration to prepare sodium acetate product and sodium acetate trihydrate product. The sodium acetate and sodium acetate trihydrate production device can simultaneously meet the demand of producing sodium acetate product and sodium acetate trihydrate product, and can timely adjust the production of the sodium acetate product and the sodium acetate trihydrate product according to actual production demand.

The invention relates to the technical field of hazardous waste treatment, in particular to a cuprous cyanide-containing solid waste treatment method which comprises the following steps: (1) solid dissolution; (2) first-stage oxidation; (3) second-stage oxidation; and (4) product treatment. According to the scheme, cuprous cyanide in the solid waste is partially dissolved through the alkali liquor, then cuprous cyanide is oxidized through the oxidizing reagent under the condition of different pH values, sodium cuprate is prepared, and the sodium cuprate is separated out to obtain the sodium cuprate product. According to the scheme, operation is easy, disposal is safe, recyclable resources in the waste are turned into wealth, and resource waste is avoided.

The invention is applicable to the technical field of drug synthesis, and relates to a docusate sodium bulk drug synthesis process, which comprises the following steps: (1) monoester reaction; and (2) carrying out diester reaction. The process disclosed by the invention has the beneficial effects that the production rate of the diisooctyl maleate is improved, and the content of the docusate sodium product is improved; the operation process is simplified, and the production cost is saved; in addition, low alcohols are not adopted, so that genotoxic impurities are avoided, the safety of the docusate sodium product is ensured, and the quality of the product is improved.

The invention relates to a process for producing high-quality potassium chloride by using carnallite, which comprises the following steps of: crushing and grinding solid raw materials, adding fresh water to decompose and crystallize, reducing the content of sodium chloride in the solid raw materials through primary flotation, and reducing the content of gypsum and insoluble substances in the solid raw materials through secondary flotation, performing coarse potassium dehalogenation, coarse potassium washing, fine potassium filtering and wet product drying on foam obtained by grading, and then performing grinding and triboelectric separation on the dried fine potassium powder to obtain a final high-quality potassium chloride product; performing dehalogenation on tailings obtained by two times of flotation and underflow purified by mother liquor to form solid tailings, and performing stockpiling or filling; and returning a high-sodium product obtained by triboelectric separation to crude potassium washing. The high-quality potassium chloride meeting the GB / T 37918-2019 type I potassium chloride standard is produced by taking the carnallite ore as the raw material, the influence of the fluctuation of the quality of the raw ore is small, the high-quality potassium chloride product is stably produced under the condition of guaranteeing the overall potassium yield of the process, and the method has obvious technical advantages and relatively high application and popularization values.

The invention discloses a process method for preparing sodium aluminate from waste residues in a short kiln, which comprises the following process steps: S1, carrying out desalting pretreatment on the waste residues, and after roasting, reserving samples of the waste residues to be treated; s2, roasting the roasted waste residue and an additive in a short kiln, dissolving out, and carrying out solid-liquid separation to obtain a dissolved solution; and S3, carrying out sodium aluminate dissolution rate detection on the dissolution liquid. The invention relates to the technical field of waste residue resource utilization, the aluminum ash slag is used as a main raw material for desalting, mixing, roasting to prepare sodium aluminate and dissolving out to obtain a sodium aluminate solution, the sodium aluminate can be prepared from the aluminum ash slag in a short kiln in the process, and compared with a traditional method for preparing a high-aluminum material from the aluminum ash slag and a traditional method for preparing the sodium aluminate from the aluminum ash slag in a long kiln, the method has the advantages that the cost is low; the product added value is higher, the process flow is short, and the energy consumption is low.

The invention relates to a high-valued utilization method of fluorine, lithium, aluminum and sodium elements in a lithium-containing electrolyte, which is characterized in that valuable elements Li < + >, F <->, Al < 3 + > and Na < + > in the lithium-containing electrolyte are recovered under the condition of leaching the lithium-containing electrolyte in a mild aluminum sulfate solution environment, and the valuable elements are selectively separated by adding an auxiliary agent. The whole technological process is simple, high-valued utilization of the lithium-containing electrolyte is achieved, the valuable element recovery rate is high, the production cost is low, the comprehensive benefits of the lithium-containing electrolyte are effectively improved, secondary pollution is avoided, and the purity of aluminum fluoride and sodium carbonate products meets the current national standard requirement.

The invention relates to the technical field of microbial fermentation, and specifically discloses a high-whiteness fermented sodium propionate and a preparation method thereof. The preparation method of the high-whiteness fermented sodium propionate comprises: inoculating a propionibacterium seed liquid into a fermentation medium for anaerobic fermentation, stirring and mixing the liquid alkali to maintain the fermentation pH to 6.5-7.0, adding modified bentonite to heat and stir after fermentation and culture to obtain a sodium propionate fermentation liquid; filtering the sodium propionate fermentation liquid through a ceramic membrane and an ultrafiltration membrane in sequence, evaporating and concentrating the liquid, adding acid to adjust the pH, and spray drying to obtain the high-whiteness fermented sodium propionate; the obtained high-whiteness fermented sodium propionate product has high whiteness, high light transmittance, high yield, excellent comprehensive performance, meets the requirements of national food safety standards, and has broad market prospects.

The application belongs to the field of biotechnology separation, and discloses a desalination method in the production process of sodium mannose phosphate, which comprises the following steps: centrifugal ultrafiltration is performed on the sodium mannose phosphate reaction solution obtained through enzyme catalysis reaction, so that the membrane-passing clear liquid is obtained; and the membrane-passing clear liquid is subjected to desalination through electrodialysis, so that the sodium mannose phosphate product is obtained. The method is suitable for the removal of phosphate, hypophosphite and other ions with small molecular weight, and the method is simple in operation, efficient in desalination and green in environmental protection.

The application provides a PTA industry chemical waste salt resource treatment method, which comprises the following steps: firstly, dissolving and filtering the chemical waste salt containing sodium carbonate and sodium bromide; vacuum evaporating and crystallizing the filtered filtrate, controlling the evaporation ratio, and obtaining an industrial-grade sodium carbonate product with high purity; evaporating the mother liquor into a cooling crystallizer to separate and obtain sodium carbonate decahydrate for reuse; after being concentrated by an evaporation crystallizer, the cooled mother liquor is introduced into a sodium bromide cooling crystallizer to separate and obtain an industrial-grade sodium bromide product, and part of the sodium bromide crystallization mother liquor is recycled and part is taken out for drying. The crystallization process combining evaporation crystallization and cooling crystallization can effectively recover valuable components in the PTA industry chemical waste salt, without adding additional raw materials and chemical additives to assist production, without causing secondary pollution of waste water and additional solid waste output; low energy consumption and low cost realize the resource of the chemical waste salt, greatly reduce the hazardous waste treatment cost, solve the environmental protection problem, and have great economic benefits.

This invention belongs to the field of biotechnology separation and discloses a purification method for crude sodium mannose phosphate. The method includes: centrifuging and ultrafiltration of the sodium mannose phosphate reaction solution obtained from a catalytic reaction to obtain a membrane-filtered supernatant; purifying the supernatant using a two-step electrodialysis method, repeating the purification 2-5 times to obtain an aqueous solution of sodium mannose phosphate; and then drying the solution to obtain a high-purity sodium mannose phosphate product. Different ion exchange membranes are used in the two-step electrodialysis method. This method, through electrodialysis, combines a homogeneous membrane and an alloy membrane to achieve effective separation of nonionic impurities such as mannose, as well as various phosphates, from sodium mannose phosphate.

This invention relates to the field of steel solid waste resource utilization and heavy metal pollution control technology, specifically to a method for preparing low-thallium chloride products by deep dethallium removal from steel solid waste. The method uses sintering machine head ash, blast furnace bag ash, coke powder, and water as raw materials, and processes them through steps such as raw material treatment, coarse dethallium removal, heavy metal removal, deep dethallium removal, calcium and magnesium removal, extreme dethallium removal, and potassium and sodium product preparation. This yields potassium chloride and sodium chloride products with extremely low thallium content, and significantly reduces the thallium content in the circulating slag. By specifically setting the location, step details, and parameters for each step of coarse, deep, and extreme dethallium removal, the purity of the potassium and sodium salt products and the stability of the production process are ensured, demonstrating promising industrial application prospects.

The invention discloses a preparation method of pantoprazole sodium enteric-coated tablets, and relates to the technical field of pantoprazole sodium enteric-coated tablets, and the preparation method comprises the following preparation steps: step 1, preparing pantoprazole sodium; 2, the raw materials are sieved by a 120-200-mesh sieve and then mixed for 15-25 min, and a pre-mixture is obtained; step 3, taking out the premixture with the mass being 2.5-3.5 times that of the magnesium stearate, mixing the premixture with the magnesium stearate for 3-5 minutes, sieving through a 120-200-mesh sieve, and continuously stirring and mixing for 5-10 minutes; and step 4, tabletting and coating to obtain the pantoprazole sodium enteric-coated tablet. According to the preparation method of the pantoprazole sodium enteric-coated tablet, 2-chloromethyl-3, 4-dimethoxypyridine hydrochloride and 5-difluoromethoxy-2-sulfydryl-1H-benzimidazole are taken as starting materials to synthesize pantoprazole sodium, the total yield of the product is 67.3% on average, the purity of the pantoprazole sodium is 99.95% on average, the purity of the pantoprazole sodium is 99.95% on average, and the purity of the pantoprazole sodium is 99.95% on average. Materials and reagents used in the synthesis process are materials for industrial production, low in price and easy to obtain, the synthesis process is simple to operate, and the synthesized pantoprazole sodium is high in purity and good in stability.