41 results about "Lime acetate" patented technology

The invention discloses a mineral cemented filling mortar material for mineralizing and sealing CO2 and a preparation method thereof, and relates to the technical field of low-carbon environment-friendly mortar materials, the raw materials comprise carbonic anhydrase-producing microorganisms, aggregate, a calcium source solution and nano zinc oxide; wherein the calcium source solution is an aqueous solution of calcium chloride, calcium nitrate or calcium acetate, the calcium source solution comprises a premixed calcium source solution and a gradient calcium source solution, the concentration of Ca < 2 + > in the premixed calcium source solution is 0.5 mol / L, the concentration of the gradient calcium source solution is 2 mol / L, and the premixed calcium source solution is used after being premixed with the aggregate; the particle size of the nano zinc oxide is 50-100 nm; according to the present invention, the storage amount of carbon dioxide can be increased so as to achieve the requirements of low carbon and carbon reduction, the reaction rate of CO2 hydration to generate HCO3 <-> / CO3 < 2-> can be significantly increased, the generation of HCO3 <-> / CO3 < 2-> can be accelerated, the CO2 hydration reaction and the subsequent gelling effect can be further accelerated, and the environmental protection and low carbon performance can be improved.

The invention discloses a preparation method of a calcium acetate oral solution. According to the invention, the mono-ammonium glycyrrhizinate is dissolved in a glycerol aqueous solution, a solution is formed through transient heating, and then the solution is mixed with calcium acetate and other auxiliary materials, so that the problem of generation of insoluble substances can be solved; meanwhile, the calcium acetate oral solution prepared by the method is transparent and clear in a 6-month acceleration test, so that the uniformity and the stability of the product are ensured. By creatively improving the adding mode of the taste masking agent, the problem of solubility of the mono-ammonium glycyrrhizinate in the preparation process of the product is solved, and the stability of the product is good. According to the invention, the material adding mode and process parameters are further researched, the preparation time is shortened, and the production efficiency of medicines is improved.

The invention relates to a biochar enhanced microbial mineralization improved compacted clay covering barrier layer and a construction method thereof.The barrier layer is prepared from a urease bacterium excitation solution, a calcium acetate solution, biochar and site in-situ soil, the total dry mass of all components in the urease bacterium excitation solution accounts for 4.5%-8.5% of the mass of the site in-situ soil, and the total dry mass of all components in the calcium acetate solution accounts for 4.5%-8.5% of the mass of the site in-situ soil. The dry mass of the solute of the calcium acetate solution accounts for 4.0%-10.0% of the mass of the site in-situ soil material, and the dry mass of the biochar accounts for 4.0%-8.0% of the dry mass of the site in-situ soil material. Compared with the prior art, the method has the advantages that site in-situ soil materials are treated through an in-situ excitation microbial mineralization method, the seepage reduction and gas barrier performance of a compacted clay covering barrier layer can be remarkably enhanced, and meanwhile, the binding force enhanced by mineralization among soil particles plays an important role in inhibiting water loss and cracking of a soil body.

The invention discloses an environment-friendly snow melting agent which is mainly prepared from the following raw materials in percentage by mass: 20-50% of potassium acetate, 10-16% of potassium chloride, 4-10% of calcium chloride and calcium acetate, 3-7% of magnesium chloride, 10-30% of an ice-resistant binder, 11-17% of a soil protective agent, 5-6% of cellulose and 3-9% of a plant protective agent. The ice-resistant binder is one or a combination of more of calcium acetate, magnesium acetate, potassium acetate and potassium formate, the mass ratio of calcium acetate to magnesium acetate is 3: (7.5-8.5), and the soil protective agent comprises 5-15% of diatomite and 10-20% of bentonite. Compared with the prior art, the environment-friendly snow melting agent disclosed by the invention can reduce the freezing point, prevent adhesion of an ice layer and a road surface and accelerate melting of an ice surface, so that a melted ice-snow-water mixture is easier to remove, effective recycling of resources is realized, pollution to the environment is reduced, and meanwhile, the treatment pressure of wastes is reduced.

The invention discloses a preparation method of bis-hydroxyethyl bisphenol A ether, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: adding bisphenol A, a mixed acetate catalyst and a solvent into a reaction kettle, starting stirring, replacing nitrogen, heating to a reaction temperature, starting to introduce ethylene oxide, keeping the temperature after the ethylene oxide is added, and continuously reacting until the pressure is not reduced any more to obtain bisphenol A; cooling to a desolventizing temperature, desolventizing until no solvent is discharged, cooling, degassing, and discharging to obtain the bis (hydroxyethyl) bisphenol A ether, wherein the mixed acetate catalyst is prepared from calcium acetate, magnesium acetate and barium acetate; the solvent is methyl cyclohexane. According to the preparation method, the specific mixed acetate is adopted as the catalyst, methyl cyclohexane is adopted as the solvent, the excellent catalytic effect is achieved, the prepared bis-hydroxyethyl bisphenol A ether is high in content, low in hydroxyl value and light in color, and the solvent is small in toxicity and easy to recycle.

1. Name of the designed product: medicine packing box (0.6g sugar-free calcium acetate granule). 2. Use of the designed product: used for packing sugar-free calcium acetate granule. 3. Design points of the designed product: in the pattern. 4. Picture or photo best indicating the design points: front view.

The invention relates to the technical field of feed additives, and provides a feed additive of a laying hen eggshell improver as well as a preparation method and application of the feed additive. The feed additive of the egg shell improver for the laying hens comprises the following raw materials: glutathione, vitamin E, calcium acetate, potassium chloride, organic selenium and a caulis spatholobi extract, and a preparation method of the caulis spatholobi extract comprises the following steps: crushing and sieving caulis spatholobi to obtain caulis spatholobi powder; adding the caulis spatholobi powder into water, performing ultrasonic extraction, and filtering to obtain a first extracting solution and first filter residues; adding the first filter residue into a mixed extracting agent, performing reflux extraction, and filtering to obtain a second extracting solution and a second filter residue; mixing the first extracting solution and the second extracting solution, and performing extraction, vacuum concentration and drying to obtain a caulis spatholobi extract; the mixed extracting agent consists of ethanol and propylene glycol in a mass ratio of (6-7): 3. According to the technical scheme, the problem that the eggshell quality improvement effect of an eggshell improver in a feed additive in the related technology is poor is solved.

1. The name of the design product: medicine packaging box set (calcium acetate capsule). 2. The use of the design product: for the packaging of calcium acetate capsules. 3. The design points of the design product: in the pattern. 4. The picture or photo that best indicates the design points: main view of set 1. 5. Other circumstances that need to be explained: Set 1 is the outer packaging box of calcium acetate capsules, and Set 2 is the inner packaging bottle of calcium acetate capsules.

The invention discloses a carbon dioxide adsorption, storage and flame retardant method for a mine. The method comprises the following steps: preparing a carbon dioxide adsorption coating ZIF-8 derived porous carbon dispersion liquid; preparing a sealed carbon-sequestration flame-retardant material: mixing the prepared mineralized bacteria solution and the saturated CaCl2 solution / saturated calcium acetate solution to obtain the sealed carbon-sequestration flame-retardant material; the method comprises the following steps: uniformly coating a carbon dioxide adsorption coating ZIF-8 derived porous carbon dispersion liquid on the surface of a coal sample in a mine carbon dioxide gathering area, standing for a period of time, and after the treated coal sample fully adsorbs carbon dioxide in an underground environment, spraying a sealed carbon sequestration flame-retardant material on the surface of the coal sample to generate a calcium carbonate precipitation layer; carbon dioxide adsorption and sealing and pore plugging of the goaf are realized. According to the invention, stable carbon sequestration and storage of carbon dioxide in the underground goaf of the mine can be realized, the spontaneous combustion phenomenon of underground coal is effectively inhibited, and the underground CO2 emission is fundamentally reduced.

The application relates to the field of plastic concrete, and particularly discloses a preparation method of plastic concrete using machine-made sand grading, which comprises the following steps: screening construction waste to obtain sand I, sand II and sand III with particle sizes >0.5 mm, 0.5-0.2 mm and <=0.2 mm; uniformly mixing sand I, a coupling agent and an emulsion, drying the mixture to obtain machine-made sand I; uniformly stirring sand II and a polyvinyl alcohol solution, adding an epoxy-based silicate, and heating to obtain machine-made sand II; uniformly mixing sand III, a calcium acetate solution and a polysulfonate resin, kneading the mixture, and then performing roasting activation to obtain machine-made sand III; uniformly mixing cement, water, machine-made sand I, machine-made sand II, machine-made sand III, gravel, an acrylic-methyl acrylic copolymer, a blending powder and an additive. The application forms grading machine-made sand through a specific modification method, and can significantly improve the elastic modulus and impermeability of the plastic concrete.

The invention discloses a preparation method of a concrete crystal nucleus early strength agent and the prepared concrete crystal nucleus early strength agent. The preparation method of the concrete crystal nucleus early strength agent comprises the following steps: (1) adding sodium acetate and calcium acetate into water to form an acetate solution, wherein the temperature of the solution is not lower than 90 DEG C; (2) dissolving sodium metasilicate nonahydrate in water, and heating to not lower than 90 DEG C to form a sodium silicate solution; (3) heating the hot melt adhesive to be not lower than 90 DEG C and completely melting to obtain hot melt adhesive slurry; (4) stirring the hot melt adhesive slurry, slowly dropwise adding an acetate solution and a sodium silicate solution at a constant speed, and synchronously performing ultrasonic dispersion to obtain a mixed emulsion; and (5) spraying the mixed emulsion into the air through atomization equipment, and continuously blowing the mixed emulsion with warm air so that the mixed emulsion floats in the air and naturally falls to form the concrete crystal nucleus early strength agent. The crystal nucleus early strength agent prepared by the method can effectively improve the early strength of concrete, reduce the volume shrinkage of the concrete and improve the construction efficiency in winter.

The present application discloses a mine cementitious filling mortar material for mineralizing and sequestering CO2 and a preparation method thereof, which relates to the technical field of low-carbon environmental protection mortar materials. The raw materials include: microorganisms producing carbonic anhydrase, aggregates, calcium source solution, and nano-zinc oxide; wherein, the calcium source solution is an aqueous solution of calcium chloride, calcium nitrate or calcium acetate, and the calcium source solution includes a premixed calcium source solution and a gradient calcium source solution. Calculated according to Ca 2+ , the concentration of Ca 2+ in the premixed calcium source solution is 0.5 mol / L, and the gradient calcium source solution is 2 mol / L. The premixed calcium source solution is premixed with the aggregates and then used; the particle size of the nano-zinc oxide is 50-100 nm; it can meet the requirements of low-carbon and carbon reduction by increasing the amount of sequestered carbon dioxide, significantly improve the reaction rate of CO2 hydration to generate HCO3 ‑ / CO3 2‑ , accelerate its generation, and then accelerate the CO2 hydration reaction and subsequent gelling action, and improve the environmental protection and low-carbon performance.

The invention relates to the field of composite acetate, and discloses a slow-release composite acetate low-freezing-point filler and a preparation method thereof.The preparation method comprises the steps that any two or more of sodium acetate, calcium acetate, potassium acetate or magnesium acetate are selected according to a preset proportion and evenly mixed, and an acetate mixed material is obtained; any two or more than two carriers of lignin fiber, diatomite, bentonite, zeolite and attapulgite are selected according to target slow release performance requirements; deionized water is taken and placed in an oil bath stirring pot, the heating temperature is controlled to 60 DEG C, and the acetate mixture is added; slowly adding the composite carrier within 10 minutes after the acetate is completely dissolved; transferring the adsorbed slurry to a constant-temperature drying box, and drying at 120 DEG C for 68 hours; mechanically crushing the dried solid material, controlling the particle size at 0.06 mm, and performing ultrasonic screening to obtain an intermediate product with uniform particle size; the invention has the advantage of excellent slow release performance.

The invention relates to a plant and a method for purifying flue gases from industrial emissions and / or for recovering and reconverting sulfur oxides and / or nitrogen oxides and / or carbon dioxide contained in the flue gases. The method comprises by means of one or more aqueous solutions selected from the group comprising:-a solution having an acidic pH of between 0.5 and 1; -a solution having a pH between 3 and 5, a pH of about 4; a-Ca (OH) 2 or CaCl2 or calcium acetate solution; -a solution having a pH of between 8 and 9.

The invention discloses a sodium alginate modified repairing material and a method for reinforcing a tunnel lining, and relates to the technical field of tunnel lining crack repairing materials.The repairing material is prepared through the following preparation method that bacillus pasteurii liquid is cultured in advance, and OD600 ranges from 0.6 to 0.8; adding the bacterial liquid into a urea solution with the concentration of 0.5 mol / L to 1.5 mol / L; 0.5%-1.5% of sodium alginate is added and stirred until the sodium alginate is completely dissolved, the consistency of the solution is 1900 mPas to 2100 mPas at the moment, and a mixed solution is formed; the mixed solution is mixed with a 1.0 mol / L-2. 0mol / L calcium acetate solution to form the repair material, and the volume ratio of the mixed solution to the calcium acetate solution is 1: (1-2). According to the invention, the crack plugging efficiency and compactness can be improved; the durability in an acid-resistant environment is enhanced; the bonding performance of the fiber cloth and a concrete interface is optimized; and efficient, green and high-adaptability comprehensive reinforcement is realized.

The invention belongs to the technical field of sewage treatment, and discloses a microbial directional mineralization sludge solidification desilting body preparation method and device, and the method comprises the following steps: S1, storing sludge slurry in a solidification pool; s2, preparing a high-concentration complex microbial inoculant solution; s3, adding the complex microbial inoculant solution and the glue solution prepared in the step S3 into a curing tank in proportion, and mixing through stirring equipment; and S4, pressurizing and dehydrating the reacted sludge system to obtain the microorganism directional mineralization sludge solidification desilting body. According to the scheme, after the impurities in the original sludge are removed, the sludge slurry is stored in the curing tank, then the complex microbial inoculant liquid and the mixed solution of urea and calcium acetate are added into the curing tank according to the proportion, the mixture is stirred and subjected to standing maintenance for 6-12 hours, and then the mixture is pressurized and dehydrated; and finally, the microorganism directional mineralization sludge solidification desilting body is obtained, and the problem that energy consumption and cost are sharply increased due to large-scale sludge solidification treatment in a heating mode is solved.

This application relates to the field of ceramic materials technology, and discloses a heat-resistant ceramic glaze with high thermal shock resistance and low expansion, and its preparation method. The glaze comprises 70.0–80.0 parts of base powder, 20.0–30.0 parts of β-spodumene clinker, 50.0–60.0 parts of added water, 0.2–0.4 parts of sodium polyacrylate, 0.1–0.3 parts of sodium carboxymethyl cellulose, and 0.05–0.15 parts of calcium acetate. The base powder contains inorganic raw materials such as calcium borate. Within the system, a three-dimensional yield network structure is formed by the cross-linking of the molecular chains of sodium carboxymethyl cellulose and calcium ions ionized from calcium acetate. During preparation, the base powder and β-spodumene clinker are sequentially fed into a ball mill for grinding, and a cross-linking agent is added before stopping the mill. This invention utilizes the three-dimensional yield network structure to stably suspend large-particle-size β-spodumene clinker. When the ceramic product experiences drastic temperature changes, the low-expansion crystal remnants retained internally buffer thermal stress concentration, thereby effectively preventing glaze surface cracking.

To provide a novel quality retaining agent that can readily and effectively retain quality of peeled and / or cut vegetable and fruit when being stored and has high safety, and to provide a method for retaining quality of peeled and / or cut vegetable and fruit.SOLUTION: A peeled and / or cut vegetable and fruit quality retaining agent includes (A) ascorbic acid and / or salt thereof, (B) insoluble dietary fiber, and (C) calcium acetate, as active ingredients.SELECTED DRAWING: None

This invention discloses a method for carbon dioxide adsorption, sequestration, and flame retardancy in mines, comprising the following steps: preparing a carbon dioxide adsorption coating ZIF-8 derived porous carbon dispersion; preparing a carbon sequestration and flame retardant material: mixing a prepared mineralized bacterial solution and a saturated CaCl2 solution / saturated calcium acetate solution to obtain the carbon sequestration and flame retardant material; uniformly coating the carbon dioxide adsorption coating ZIF-8 derived porous carbon dispersion onto the surface of a coal sample in a carbon dioxide accumulation area of ​​the mine, allowing it to stand for a period of time, and after the treated coal sample has fully adsorbed carbon dioxide from the underground environment, then spraying the carbon sequestration and flame retardant material onto the surface of the coal sample to generate a calcium carbonate precipitate layer, thereby achieving carbon dioxide adsorption and sequestration and pore sealing in the goaf. This invention can achieve stable carbon sequestration and sequestration of carbon dioxide in the goaf of mines, while effectively suppressing spontaneous combustion of coal underground, fundamentally reducing underground CO2 emissions.

The invention provides a method and equipment for preparing calcium sulfate from desulfurization residues, and relates to the field of calcium sulfate nonmetallic mineral product manufacturing. The method for preparing calcium sulfate by utilizing the desulfurization residues comprises the following steps: S1, mixing the desulfurization residues and a potassium carbonate solution according to a solid-to-liquid ratio of 1: (0.8-10), and stirring for 0.5-12 hours at the temperature of 25-80 DEG C to obtain calcium carbonate residues and potassium sulfite mother liquor; s2, mixing the calcium carbonate residues with a 2-5 mol / L acetic acid solution, and stirring for 10-360 minutes at the temperature of 25-80 DEG C to obtain a calcium acetate mother solution and filter residues. According to the method for preparing calcium sulfate by utilizing the desulfurization residues, calcium and sulfur elements in the waste resource desulfurization residues are effectively separated and converted into calcium sulfate whiskers and potassium sulfate with market value. And cascade conversion and high-value utilization of main valuable elements in the desulfurization slag are achieved, and economic benefits are remarkably improved. Meanwhile, the stockpiling or landfill amount of the desulfurization slag is reduced, the environmental burden is relieved, and secondary pollution possibly caused by a traditional treatment mode is avoided.

The present invention provides a method for preparing high-purity gypsum from phosphogypsum and by-producing sodium acetate trihydrate. The method mainly includes: 1) Dissolving sodium carbonate in water, then adding phosphogypsum, stirring at a constant temperature to carry out a decomposition reaction. After the reaction ends, calcium carbonate residue and sodium sulfate mother liquor are separated; 2) Adding the calcium carbonate residue to acetic acid solution to react to obtain calcium acetate mother liquor and solid residue; 3) Adding the calcium acetate mother liquor to the sodium sulfate mother liquor to react to obtain calcium sulfate dihydrate precipitate and sodium acetate trihydrate mother liquor. After adjusting the pH of the mother liquor, it is concentrated and crystallized to obtain sodium acetate trihydrate product. The present invention uses a chemical method to treat the bulk solid waste phosphogypsum to prepare high-purity gypsum, and at the same time by-produces sodium acetate trihydrate, and develops a low-cost and high-efficiency process for the high-value utilization of phosphogypsum.

The utility model provides a device for producing calcium acetate by utilizing phosphate tailings, which comprises a phosphate tailings conveying belt and a reaction tank, the phosphate tailings conveying belt conveys the phosphate tailings into the reaction tank, a glacial acetic acid tank is connected with the reaction tank through a pipeline to provide acetic acid for the reaction tank, and the reaction tank is sequentially connected with a slurry conveying pump and a mixing adjusting tank through pipelines. Calcium powder is added into the mixing and adjusting tank, the mixing and adjusting tank is sequentially connected with a mixed slurry conveying pump and a filter press through pipelines, filter slurry of the filter press is conveyed to the extraction tank, the ethanol tank is connected with the extraction tank through a pipeline and used for providing ethanol for the extraction tank, and the extraction tank is sequentially connected with an extraction slurry pump and a belt filter through pipelines. The primary washing pipe supplies water to the belt filter to wash the filter material, and the filter material of the belt filter is conveyed to the calcium acetate finished product drying system to be dried. According to the device for producing calcium acetate by using the phosphate tailings, the phosphate tailings are recycled and used for producing calcium acetate, and waste is reduced.

The application discloses a preparation method of a dihydroxyethyl bisphenol A ether and belongs to the technical field of organic synthesis. The steps of the preparation method are as follows: bisphenol A, a mixed acetate catalyst and a solvent are added into a reaction kettle, nitrogen is replaced after stirring is started, the temperature is increased to a reaction temperature, then the reaction is started by introducing ethylene oxide, the temperature is kept after the ethylene oxide is added completely, the reaction is continued until the pressure does not decrease, the temperature is decreased to a desolventizing temperature, then desolventizing is carried out until no solvent comes out, and then the temperature is decreased, the gas is removed, and the product is discharged, so that the dihydroxyethyl bisphenol A ether is obtained; wherein the mixed acetate catalyst is composed of calcium acetate, magnesium acetate and barium acetate; and the solvent is methylcyclohexane. The preparation method has excellent catalytic effect, the prepared dihydroxyethyl bisphenol A ether has high content, low hydroxyl value and light color, and the solvent has small toxicity and is easy to recycle.

The application discloses a preparation method of calcium acetate oral solution; the monomethyl ammonium glycyrrhizinate is dissolved in a glycerol aqueous solution, a solution is formed through short-time heating, and then the solution is mixed with calcium acetate and other auxiliary materials, so that the problem of insoluble substances can be solved; meanwhile, the calcium acetate oral solution prepared by using the method is transparent and clear in liquid in a 6-month accelerated test, and the uniformity and stability of the product are ensured. Through the creatively improved adding mode of the taste masking agent, the solubility problem of the monomethyl ammonium glycyrrhizinate in the preparation process of the product is solved, and the stability of the product is good. The application further studies the adding mode of the materials and the process parameters, shortens the preparation time, and improves the production efficiency of the medicine.

The invention discloses a coal combustion catalyst as well as a preparation method and application thereof. The coal combustion catalyst comprises a carrier, an active agent, a desulfurizing agent and an auxiliary agent in percentage by weight, the carrier is prepared from 60%-70% of TiO2 and an anatase phase gt; 90%; the specific surface area is 80-120m / g; the average particle size D50 is 5-15 [mu] m; the pore volume is gt; 0.2 cm / g; the active agent is a mixture of 12%-20% of Fe2O3 and CuO, the desulfurizing agent adopts CaO with calcium acetate as a precursor and accounts for 8%-12%, and the auxiliary agent is a mixture of MnO2 and WO3 with the content smaller than or equal to 5%. Compared with pure coal combustion, the coal combustion stability can be enhanced by adding the catalyst under the action of promoting free radical chain reaction by manganese sesquioxide and copper oxide, and the temperature fluctuation of a hearth is reduced by 15-20% under the working condition of low load or inferior coal, so that the fire extinguishing risk is avoided; meanwhile, through catalytic oxidation of the catalyst, carbon monoxide can be further oxidized into carbon dioxide, so that the emission concentration of carbon monoxide is greatly reduced.

The invention discloses an arginine perindopril solid dispersion and a compound preparation thereof, and belongs to the technical field of pharmaceutical preparations. The arginine perindopril solid dispersion provided by the invention is prepared from the following components in parts by mass: 1 part of arginine perindopril, 0.1 to 0.3 part of calcium acetate and 5.2 to 5.4 parts of microcrystalline cellulose. The arginine perindopril solid dispersion and the compound perindopril amlodipine tablet prepared from the arginine perindopril solid dispersion have excellent stability, the preparation methods of the arginine perindopril solid dispersion and the compound perindopril amlodipine tablet are simple to operate, actual production is facilitated, and a drying agent can be prevented from being used during preparation packaging.

The application relates to the technical field of building materials, and particularly discloses a microbial interface agent for a post-pouring belt as well as a preparation method and application thereof. The microbial interface agent disclosed by the application comprises the following components in parts by weight: bacillus pasteurii bacterial liquid 0.02-0.06 parts, cement raw paste with a water-cement ratio of 0.4-0.5 90-110 parts, foaming agent 0.5-1 part, compatible agent 0.1-0.5 part, calcium salt saturated solution 0.2-0.5 part and aliphatic dihydric alcohol 0.03-0.07 part; the compatible agent is selected from one or more of sodium dodecyl sulfate, cocamide and polyoxyethylene ether; and the calcium salt saturated solution is selected from one or more of calcium acetate solution, calcium formate solution and calcium hypophosphite solution. The application further provides a preparation method of the microbial interface agent and an application process in the post-pouring belt. The microbial interface agent provided by the application can effectively improve the bonding strength, anti-leakage performance and durability of new and old concrete.

The utility model discloses a drying device for calcium acetate bulk drug processing relates to the field of calcium acetate bulk drug, the drying device for calcium acetate bulk drug processing, including chain type drying furnace, adjusting unit and drive unit, the drying device for calcium acetate bulk drug processing, through drive unit along chain type drying furnace in mobile, under the movement of drive unit, while turning over the rod rotates in the storage box, under the rotation of turning over the rod, the calcium acetate bulk drug in storage box is rolled, and the calcium acetate bulk drug in chain type drying furnace is conveniently dried evenly, avoids the uneven drying of the bottom calcium acetate bulk drug and occurs, does not need to repeat drying, improves the calcium acetate bulk drug processing effect.

The invention discloses a green process method for preparing high-purity calcium acetate based on ground calcium carbonate, and relates to the technical field of calcium acetate. The calcium acetate is prepared from the heavy calcium carbonate and the acetic acid, the reaction process is optimized through raw material pretreatment and graded neutralization technologies, the release of acid mist and CO2 is reduced, the safety is improved, the conversion rate is increased, and the reaction time is shortened. And by adopting a seed crystal in-situ regrowth technology, microcrystals in the mother liquor are recovered, so that the cost is reduced, the crystallization efficiency is improved, and the cyclic utilization of resources is realized. The process has the advantages of high efficiency, simplicity, convenience, low energy consumption, environment friendliness and easiness in industrialization, and a new way is provided for reduction and high-value utilization of the ground calcium carbonate.