44 results about "Potassium formate" patented technology

The invention relates to the technical field of potassium formate preparation, in particular to a device and method for preparing potassium formate through potassium hydroxide, surrounding feeding, compression forming and double cutting are integrated, potassium hydroxide powder enters a surrounding mechanism through an input pump, raw materials are randomly fed into a compression shell, accumulation is effectively avoided, a compression piston is driven to ascend and descend in a reciprocating mode, and the potassium formate is prepared. And the powder is extruded into a compact cylinder, and feeding and compression are synchronously controlled, so that the continuous process is ensured. The double-cutting system accurately controls the height of a movable blade through an adjusting support so as to lock the total volume of raw materials, an adjustable blade and a bottom supporting base alternately move, a column body is divided into multiple sections of small columns, the reaction surface area is increased through geometric progression, and accurate regulation and control of the reaction rate are achieved. According to the device, quantitative control of the feeding amount, dynamic adjustment of the reaction rate and cleaning of the operation environment are achieved, and the accuracy and safety of potassium formate preparation are improved.

The invention discloses a preparation method and application of double-doped biochar, and belongs to the technical field of biochar preparation, and the preparation method comprises the following steps: cleaning, drying and crushing apple branches to obtain branch powder with uniform particles; uniformly blending the branch powder, urea and potassium formate with deionized water, drying, and carrying out calcination reaction at 600-800 DEG C; cooling to room temperature, sequentially washing with diluted hydrochloric acid and deionized water until the pH is constant, and drying to obtain N-doped biochar; and uniformly blending the N-doped biochar and ammonium fluoride by using deionized water, drying, and carrying out calcination reaction at 400-600 DEG C to obtain the double-doped biochar. Compared with single N doping, the preparation method of the N and F double-doped biochar provided by the invention can more efficiently regulate and control pore development of the biochar, the step-by-step preparation method can accurately regulate and control the introduction effect of doped elements, the specific surface area of the prepared N and F double-doped biochar is greatly increased, and the preparation method is suitable for large-scale industrial production. And a sufficient structure bearing foundation is provided for the high-efficiency adsorption performance of the material.

This invention belongs to the field of mineral flotation technology, and discloses a flotation collector for non-ferrous metal sulfide ores, its preparation method, and its application. The collector uses O,O-dialkyldithiophosphate as a starting material, and reacts sequentially with a halocarboxylic acid ester, hydrazine hydrate, potassium hydroxide, and carbon disulfide in anhydrous ethanol in a three-step reaction to obtain the target product, O,O-dialkyldithiophosphate hydrazide-N′-dithiocarbamate potassium. Its molecular structure simultaneously contains three active groups: a dithiophosphate group, an hydrazide group, and a dithiocarbamate group. This invention achieves efficient process connection and smooth transition by optimizing the material ratio, temperature, and time of each reaction step, and has advantages such as mild reaction conditions, simple operation, few side reactions, high yield, and stable product. The prepared collector exhibits excellent collecting performance and good selectivity for non-ferrous metal sulfide ores such as chalcopyrite, and is suitable for widespread application in sulfide ore flotation processes.

The invention discloses a synthetic ammonia nitrogen wash tail gas treatment process, and belongs to the technical field of nitrogen wash tail gas treatment.The synthetic ammonia nitrogen wash tail gas treatment process comprises the following specific steps that firstly, nitrogen wash tail gas is pressurized to 1-4 MPa and enters a mixing preheating reactor; 2, preparing alkali from a potassium hydroxide solution to 48%-60% through condensate water, increasing the pressure to 1-4 MPa, preheating, and feeding into a mixing and preheating reactor; step 3, CO in the nitrogen wash tail gas reacts with potassium hydroxide to generate potassium formate, a proper amount of formic acid is added for neutralization, and a product liquid 74% potassium formate is obtained after evaporation, or a solid potassium formate product 97% or above is obtained after evaporation concentration and spray drying; 4, H2 and N2 do not react and are separated into tail gas through pressure relief, the tail gas is condensed till P is smaller than or equal to 1.2 MPa and then returns to an ammonia synthesis system, and the tail gas serves as raw material gas to be continuously utilized after being pressurized. And through the designed filtering and compressing device, the cost of potassium formate and monopotassium phosphate is reduced, the project investment is small, and the product income is increased.

The invention provides an aryl alkyl ketoxime derivative as well as a preparation method and application thereof, and relates to the field of aryl oxime derivatives. The preparation method of the aryl alkyl ketoxime derivative comprises the following steps: by taking potassium formate as an additive, carrying out free radical reaction on a compound I and a compound II under ultraviolet irradiation in the presence of tert-butyl nitrite to obtain the aryl alkyl ketoxime derivative, the compound I is substituted iodobenzene or iodopyridine; the compound II is substituted styrene or thienyl ethylene; wherein a hydrogen atom transfer / single electron transfer relay sequence is utilized to activate a compound I, and tert-butyl nitrite is adopted as a bifunctional reagent, and is used as a hydrogen atom transfer reagent and an oxime source. According to the preparation method of the aryl alkyl ketoxime derivative, pre-functionalization is not needed, a reaction substrate is wide in universality and good in compatibility, reaction conditions are mild, operation is easy and convenient, a target product can be efficiently and rapidly prepared on the premise of high yield, and a new way is provided for oxime synthesis.

The present application relates to the technical field of industrial circulating cooling, and discloses an organic carboxylic acid salt industrial circulating cooling liquid and a preparation method thereof. The modified humic acid-based corrosion and scale inhibitor is obtained by introducing acrylic acid and naphthyridine sodium sulfonate functional monomers into humic acid as a skeleton, using a thiourea-based silane cation crosslinking agent as a crosslinking agent, and forming a three-dimensionally crosslinked copolymer through free radical graft copolymerization. The organic carboxylic acid salt industrial circulating cooling liquid is obtained by compounding the modified humic acid-based corrosion and scale inhibitor, a defoaming agent and potassium formate as a core antifreezing agent. Through the synergistic effect of multiple groups, the scale inhibition and corrosion inhibition performance are simultaneously improved.

The invention provides a high-temperature-resistant high-density solid-free water-based completion fluid as well as a preparation method and application thereof. The water-based completion fluid is prepared from the following components in parts by weight: 29 to 42 parts of water, 22 to 38 parts of phosphate, 12 to 17 parts of potassium formate, 8 to 12 parts of zinc bromide, 3 to 7 parts of calcium chloride, 0.5 to 2 parts of a flow pattern regulator, 2 to 3 parts of a corrosion inhibitor and 1 to 2 parts of a filtrate reducer, the flow pattern conditioning agent comprises a Dristemp and / or a Driscal D, and the flow pattern conditioning agent comprises a Dristemp and a Driscal D; the filtrate reducer is polyanionic cellulose; and the density of the water-based completion fluid is 1.6-2.2 g / cm < 3 >. The high-temperature-resistant high-density solid-free water-based completion fluid disclosed by the invention realizes good high-temperature resistance, and still has good viscosity, fluidity, temperature resistance and corrosion resistance after being subjected to hot rolling for 16 hours at the high temperature of 220 DEG C.

The invention provides a preparation process of high-purity humic acid, an intelligent integrated production system and application of the high-purity humic acid. Compared with the prior art, the process comprises the following steps: crushing weathered coal / lignite to be more than or equal to 80 meshes; a pH2-3 acid solution prepared from formic acid / acetic acid / citric acid (1: 2: 3) and the powder are stirred for acidolysis; carrying out directional analysis and solid-liquid separation on the mixed solution by using potassium formate-ammonia water compound weak base with the pH value of 8-10; and washing the filter residue with organic acid at pH 2-3, 3-4 and 4-5 sections, and drying at 100-175 DEG C to obtain the high-purity humic acid. The system comprises a self-cleaning filtering module and a flow, temperature and pressure difference online monitoring and control unit, and continuous and stable separation is achieved through target discharge amount control; and a storage monitoring module is arranged to perform real-time control and alarm on the pH value of each stage of acid liquor. The obtained high-purity humic acid and chitosan quaternary ammonium salt are compounded according to the ratio of 3: 1 to prepare nanogel with the drug loading capacity of 15%-20%, and the nanogel is used for preparing drugs for treating psoriasis through transdermal drug delivery.

A method to produce alkali formate includes introducing a catholyte solution to an electrochemical reaction chamber having a cathode, the catholyte solution comprising a mixture of alkali formate and alkali bicarbonate, introducing carbon dioxide into the electrochemical reaction chamber with a cathode, and applying electricity to the membrane to cause formation and output of alkali formate. A method to produce potassium formate, comprising introducing a catholyte solution to electrochemical reaction chamber, the catholyte solution comprising a mixture of potassium formate and potassium bicarbonate, introducing carbon dioxide into the electrochemical reaction chamber, and applying electricity to the membrane to cause formation and output of potassium formate.

A firefighting composition includes a sugar component and a salt component. the salt component including potassium formate. potassium formate hydrate. potassium acetate, magnesium sulfate, ammonium sulfate, sodium chloride, sodium sulfate, ammonium chloride. or a mixture of any two or more thereof.

This invention discloses a ketone-aldehyde-amine condensation polymer for drilling fluids, its preparation method, and its applications, belonging to the field of oilfield chemical technology. The preparation method includes: using water as a solvent, mixing ketone monomers, aldehyde monomers, and amine monomers in a specific molar ratio, and carrying out a condensation polymerization reaction at 60-85 °C for 4-10 h under alkaline conditions (pH 8.0-10.0) and nitrogen protection, followed by neutralization to obtain the product. This method is simple and environmentally friendly. The obtained polymer has a unique molecular structure, exhibiting excellent high-temperature resistance (≥180 °C) and high-salt resistance (salt resistance ≥20%), and high viscosity retention and good stability in high-density potassium formate and other brine drilling fluids. Simultaneously, this polymer possesses excellent shale inhibition and filtration loss reduction capabilities, significantly improving drill cuttings recovery rate and controlling high-temperature, high-pressure filtration loss. The polymer of this invention is particularly suitable for high-temperature, high-salt drilling fluid systems in deep wells, ultra-deep wells, and complex formations, with broad application prospects.

The invention provides a biomass synthetic drilling fluid constructed based on an alkaline bio-emulsifier. The biomass synthetic drilling fluid comprises a biomass alcohol ether base solution, a potassium formate aqueous solution, organic soil, the alkaline bio-emulsifier and an oleophylic humic acid filtrate reducer. Compared with the prior art, the biomass synthetic drilling fluid has the advantages that the biomass alcohol ether with a specific structure, the alkaline biological emulsifier and the oleophylic humic acid filtrate reducer are adopted, and under the comprehensive action of various components in the drilling fluid, the biomass synthetic drilling fluid constructed on the basis of the alkaline biological emulsifier is non-toxic in raw material, green, environmentally friendly and good in biodegradability; the system is free of chloride ions, high-valence metal ions such as Ca < 2 + > do not need to be added, and good characteristics are achieved in the aspects of high-temperature rheological property, high-temperature and high-pressure filter loss, stratum protectiveness, biodegradability and the like.

The invention discloses a low-cost and efficient biological composite carbon source for sewage treatment and a preparation method thereof, and belongs to the technical field of sewage treatment. The biological composite carbon source is prepared from the following components in parts by weight: 100 parts of vegetable waste residue fermentation liquor, 30 to 40 parts of water, 15 to 25 parts of Piteguo peel fermentation liquor, 8 to 10 parts of functional base material, 6 to 10 parts of sodium acetate, 7 to 10 parts of potassium formate, 3 to 5 parts of carbohydrate and 0.2 to 0.4 part of biological enzyme. According to the biological composite carbon source, vegetable waste residue fermentation liquor and Piteguo peel fermentation liquor are used as effective components, the preparation cost of the biological composite carbon source can be remarkably reduced, surface modification treatment is conducted on a composite carrier through first mixed liquor, and the physical structure stability of a functional base material can be improved; in addition, the functional base material subjected to oxidation treatment can play an auxiliary role in sewage treatment, and the sewage treatment effect is improved.

The invention belongs to the technical field of mineral flotation, and discloses a flotation collecting agent for non-ferrous metal sulfide ore and a preparation method and application thereof.O, O dialkyl dithiophosphate serves as an initial raw material of the collecting agent, and the target product O, O dialkyl dithiophosphate, halogenated carboxylic ester, hydrazine hydrate, potassium hydroxide and carbon disulfide are sequentially subjected to three-step reaction in absolute ethyl alcohol to prepare O, O dialkyl dithiophosphate; the molecular structure of the N, O-dialkyl phosphorodithioic acid hydrazide-N '-potassium dithioformate simultaneously contains three active groups, namely a phosphorodithioate group, a hydrazide group and dithioformate. By optimizing the material ratio, temperature and time of each step of reaction, efficient connection and stable transition of the process are realized, and the method has the advantages of mild reaction conditions, simplicity and convenience in operation, few side reactions, high yield, stable product and the like. And the prepared collecting agent shows excellent collecting performance and good selectivity on non-ferrous metal sulfide ores such as chalcopyrite, and is suitable for popularization and application in a sulfide ore flotation process.

The application provides an acid-washing high-density completion fluid and a preparation method thereof. The raw materials of the completion fluid include: 100 parts of water, 0.5-1.5 parts of a high-temperature viscosity-increasing and filtration-reducing agent, 0.2-0.6 parts of potassium hydroxide, 3-5 parts of a lignite resin filtration-reducing agent, 2-4 parts of a sulfonated asphalt plugging agent, 0.5-3 parts of a dispersion viscosity-reducing agent, 5-10 parts of potassium formate, 2-3 parts of a silicone filtration-reducing agent, 160-400 parts of an acid-soluble weighting agent and 5-6 parts of an inhibitor. The completion fluid system has good high-temperature stability, pressure-bearing temporary plugging reservoir protection and acid-washing and plugging removal capacity, can better prevent the high-density weighting agent from settling in the completion process, can promote the harmful solid-liquid phase to be discharged as much as possible after completion, can improve the reservoir permeability and the reservoir production, can timely flow back the drilling and completion fluid leaked to the formation from a single well bore, and can ensure that the drilling and completion fluid in the formation is discharged as completely as possible.

The application discloses a carbon-based negative electrode material for flexible lithium batteries and a preparation method and application thereof, and belongs to the technical field of lithium batteries. The preparation method comprises the following steps: (1) treating eucalyptus sawdust with a treatment liquid I, drying and crushing to obtain eucalyptus wood powder, wherein the treatment liquid I is prepared from urea, potassium formate and water; (2) mixing the eucalyptus wood powder with magnesium chloride and then carbonizing to obtain a carbide; (3) treating the carbide with a treatment liquid II, wherein the treatment liquid II is prepared from 2-methyltetrahydrofuran, chlorobenzylamine, triethanolamine oleic acid soap and water; and (4) heat-treating the treated carbide to obtain the carbon-based negative electrode material for flexible lithium batteries. The application can effectively recycle eucalyptus sawdust resources, reduce the preparation cost of the negative electrode material, and the prepared carbon-based negative electrode material has good performance, high specific capacity and good cycle performance.

The invention belongs to the technical field of oil exploitation, and particularly relates to solid-free high-density well killing fluid as well as a preparation method and application thereof. The well killing fluid comprises the following components in parts by mass (total 100 parts): 20-60 parts of potassium formate; 10 to 20 parts of a multifunctional tackifier; the rest is tap water; the molecular structural formula of the multifunctional tackifier is shown in the specification, and m is equal to 1000-10000; n is equal to 200 to 4000; and p is equal to 100 to 2000. The solid-free high-density well killing fluid disclosed by the invention has the advantages of high density, adjustable density, low corrosion rate, good anti-swelling effect and low damage to strata.

The invention relates to an environment-friendly active anti-freezing agent, an ultrathin wearing layer mixture and a preparation method of the environment-friendly active anti-freezing agent, the environment-friendly active anti-freezing agent has a core-shell structure and is composed of a core material and a shell material, the core material is composed of one or more of potassium formate and calcium magnesium acetate; the shell material is one or more of polyorganohydrogen siloxane and acrylic ester; the anti-freezing agent is prepared by a melt blending-crushing process, and isovolumetrically partially replaces fine aggregate and mineral powder in an asphalt mixture according to particle size distribution. The environment-friendly active anti-freezing agent has the beneficial effects that the environment-friendly active anti-freezing agent provided by the invention is low in preparation cost, environment-friendly and pollution-free, the current situation that chlorine-containing snow-melting agents such as industrial salt are used in the aspect of removing ice and snow on roads at present to corrode the roads and damage the surrounding ecological environment can be avoided, and an anti-freezing effect can be generated for a long time through one-time construction; and a large amount of manpower and material resources can be saved.

The invention discloses a coastal saline-alkali soil improver based on spartina alterniflora and a preparation method and application thereof, and belongs to the field of invasive plant recycling and saline-alkali soil improvement. The preparation method of the modifier comprises the following steps: cleaning, drying and crushing a spartina alterniflora plant, mixing with montmorillonite, mixing with one of a potassium carbonate solution, a potassium formate solution or a potassium carbonate-potassium formate mixed solution, and carrying out a hydrothermal reaction at 180-200 DEG C for 4-6 hours; after the reaction, adjusting the pH value to 8-9, adding kaolinite for solid-liquid separation, then adjusting the pH value to 3-4, centrifuging, cleaning and freeze-drying to obtain a final product. The modifier is in a dissolved state in the saline-alkali soil, takes lignin compounds as main components, and can effectively reduce the pH of the soil, remarkably increase the content of soluble organic matters, enrich beneficial microbial communities and accelerate degradation of organic pollutants in the soil. By applying the modifier, the resource utilization of the spartina alterniflora and the ecological improvement of the coastal saline-alkali soil can be synchronously realized, and the modifier has the advantages of simplicity and convenience in operation, lasting effect and environmental friendliness.

The invention discloses an anti-freezing agent for organic salt type chlorine-free coal transportation and a preparation method of the anti-freezing agent, and relates to the technical field of anti-freezing agents. According to the invention, high-purity potassium formate and sodium formate are compounded as a main anti-freezing salt, and the synergistic effect of propylene glycol and plant-derived glycerol is combined, so that the defect that existing organic acid salt is easy to separate out and crystallize at an extremely low temperature is effectively overcome, the anti-freezing agent is still kept in a stable liquid state in an environment of-40 DEG C, and the freezing point reduction effect is obviously superior to that of a single salt system; by accurately controlling the adding proportion and the dissolving process of the polyethylene glycol 400, the intersolubility and the dispersion uniformity of the components are remarkably improved, the problem of moisture absorption of the coal caused by high-concentration use is solved, and the low-temperature fluidity of the system is also enhanced; a sodium molybdate and benzotriazole compounded corrosion inhibition system is adopted and added step by step after being premixed and dissolved in deionized water, and the combination can efficiently neutralize trace acidic substances possibly generated by degradation of organic acid salt.

The present application relates to yellow phosphorus chemical technology field, specifically to a kind of yellow phosphorus tail gas heat carrier concentrated potassium formate solution preparation solid potassium formate process, first potassium formate solution is sent into heating pot, then yellow phosphorus tail gas is used as fuel to heat organic heat carrier, and high-temperature heat carrier is transported to the coil in heating pot by closed circuit circulation mode, and the solution is indirectly heated and concentrated;Concentrated liquid is transported to the surface of rotary cooling drum again, and is cooled and crystallized at the surface temperature of 20 DEG C-50 DEG C, forms the crystalline layer of predetermined thickness, finally is scraped down by scraper device, and solid potassium formate product is obtained.By using yellow phosphorus tail gas as heat source, waste is treated with waste and energy recovery is realized;Through organic heat carrier closed circuit circulation and accurate temperature control, the problems of high energy consumption and high cost of traditional electric heating process are solved, and the inconvenience of traditional water agent product storage and transportation is effectively overcome.

The application discloses a large-area catalytic electrode for alcohol electrooxidation and co-production of carboxylate, a preparation method and application thereof, and belongs to the technical field of electrocatalytic materials. 2 The above uniform electrode is used as an anode for alkaline glycerol electrooxidation reaction, can realize high-selective conversion of glycerol into formate at a lower potential, and the Faraday efficiency can be above 75%. After reaction, the electrolyte is subjected to simple acidification and crystallization treatment, and high-value potassium diformate products can be co-produced. The application realizes large-scale preparation of a non-noble metal catalytic electrode and integration of an electrocatalytic synthesis process, provides a technical path with industrial application prospect for high-value utilization of biomass glycerol and green synthesis of potassium diformate.

This invention belongs to the field of petroleum extraction technology, specifically relating to a high-temperature, high-pressure kill fluid, its preparation method, and its application. The composition and mass fraction (total 100 parts) of the kill fluid are as follows: potassium formate 10-40 parts; barium sulfate 1-3 parts; polyacrylamide 0.05-0.1 parts; amphoteric guar gum 2-5 parts; the remainder is tap water; the molecular structure of the amphoteric guar gum is as follows: [Insert molecular structure formula here]. The kill fluid of this invention has the advantages of adjustable density, low corrosion rate, low API water loss, good anti-swelling effect, and low formation damage.

The invention relates to the technical field of chemical power sources, and discloses an alkaline anti-freezing electrolyte and a preparation method of a low-temperature nickel-zinc battery. The alkaline anti-freezing electrolyte comprises solvent water and solute dissolved in the solvent water; the solute comprises a main electrolyte KOH, an anti-freezing conductive agent potassium formate, a positive stabilizer LiOH, a basic zinc source ZnO, a deposition regulator zinc acetate dihydrate and a corrosion inhibitor KF; wherein the concentration of the potassium formate is 35wt%-55wt%. The preparation method of the alkaline anti-freezing electrolyte adopts a segmented temperature control dissolution process aiming at high-concentration potassium formate. A water molecule hydrogen bond network is destroyed through potassium formate, the freezing point is reduced, the low-temperature conductivity is improved, and zinc is induced to be laid and deposited and hydrogen evolution is inhibited in cooperation with a functional additive. The working temperature range of the battery is from-60 DEG C to 25 DEG C, the problem of electrolyte freezing at low temperature is effectively solved, and the battery has excellent low-temperature discharge capacity and cycle life.

The invention discloses a low-conductivity new energy vehicle anti-freezing solution and a preparation method thereof. The low-conductivity new energy vehicle anti-freezing solution comprises the following components in percentage by volume: 40%-60% of ethylene glycol, 35%-55% of deionized water, 1.0%-5.0% of an insulating additive, 0.5%-3.0% of a corrosion inhibitor composition, 0.01%-0.1% of a defoaming agent, 0.05%-0.3% of a dye and 0.1%-1.0% of a pH regulator, sodium benzoate, potassium benzoate, sodium sebacate or potassium sebacate are adopted as specific insulating additives, and the additives can form a molecular micelle form in a system, so that metal ions are bound, the ionization tendency of the system is inhibited, the anti-freezing solution has low conductivity lower than 10 [mu] S / cm at the temperature of 25 DEG C, and the anti-freezing effect is good. And the form can be kept stable under the working conditions of long-term high-temperature circulation and wide temperature range, so that the insulating property is ensured not to be obviously attenuated along with the prolonging of the service time.

The application provides an anti-high-temperature and anti-pollution organic salt well completion fluid and a preparation method thereof, and raw materials of the well completion fluid include, in terms of weight parts, 100 parts of water, 25-30 parts of potassium formate, 100-130 parts of potassium pyrophosphate, 0.3-0.7 parts of a high-temperature tackifying and filtrate-reducing agent, 1-3 parts of a high-temperature filtrate-reducing agent, 2-5 parts of a manganese powder plugging agent, 0.5-1.5 parts of triphosphite, 0.1-0.3 parts of tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester, 1-2 parts of polyethylene oxide-polypropylene oxide copolymer, 1-3 parts of nano silicon dioxide, 0.5-1.5 parts of sodium carboxymethyl cellulose and 0.3-0.8 parts of polyacrylamide. The anti-high-temperature and anti-pollution organic salt well completion fluid system has good plugging property, can reduce formation filtration and effectively protects a reservoir.

The application relates to the evaporator technical field and discloses an intelligent circulating evaporator and method based on potassium formate production, which comprises an evaporating tank, a treatment tank arranged on one side of the evaporating tank, a steam pipe fixedly connected to the surface of the evaporating tank, a gas outlet pipe arranged between the evaporating tank and the treatment tank, a cooking box fixedly connected to the inside of the evaporating tank, and a defoaming assembly arranged in the inside of the evaporating tank. The defoaming assembly comprises a driving rod rotatably connected to the inside of the evaporating tank, an extension rod slidingly connected to the inside of the driving rod through a key groove, and a defoaming plate fixedly connected to the surface of the extension rod. Through the use of the defoaming assembly, a driving motor is started, the driving motor drives the extension rod to rotate through the driving rod, the extension rod drives a plurality of defoaming plates to rotate, the defoaming plates strike the foam through rapid rotation, the foam in the cooking box is broken, and the effect of preventing the foam is achieved.

The invention relates to the technical field of evaporators, and discloses an intelligent circulating evaporator and method for potassium formate production, the evaporator comprises an evaporation tank and a treatment tank arranged on one side of the evaporation tank, a steam pipe fixedly communicates with the surface of the evaporation tank, and the evaporation tank communicates with the treatment tank through an air outlet pipe; the interior of the evaporation tank is fixedly connected with a cooking box and a defoaming assembly, the defoaming assembly is arranged in the evaporation tank, the defoaming assembly comprises a driving rod rotationally connected to the interior of the evaporation tank, the interior of the driving rod is slidably connected with an extension rod through a key groove, and the surface of the extension rod is fixedly connected with a foam scraping plate; by using the defoaming assembly, a driving motor is started, the driving motor drives an extension rod to rotate through a driving rod, the extension rod drives a plurality of foam scraping plates to rotate, the foam scraping plates strike foams through rapid rotation of the foam scraping plates, then the foams in the cooking box are broken, and the effect of preventing the foams is achieved.

The invention relates to the technical field of fine chemical engineering, and discloses a preparation process for producing potassium formate, which is characterized in that formic acid and potassium hydroxide are used as core reaction raw materials, and a potassium formate finished product is prepared through the steps of precise neutralization reaction, compound impurity removal, activated carbon deep decoloration, vacuum concentration, gradient cooling crystallization and vacuum drying. According to the method, the reaction pH value, the reaction temperature and the material ratio are regulated and controlled, the chelating impurity removal and low-temperature crystallization processes are combined, metal ions and organic impurities in the product are effectively removed, the problems that a traditional potassium formate preparation process is low in purity, poor in yield, low in production safety and insufficient in environmental protection property are solved, and the prepared potassium formate product is high in purity, excellent in water solubility and suitable for industrial production. The method can be widely applied to the fields of oilfield drilling, snow-melting agents, leather tanning, chemical intermediates and the like, and is suitable for large-scale industrial production.

The invention discloses a preparation method and application of a hydrogenated carbonate catalyst based on metal loaded cerium oxide, and relates to the technical field of catalyst preparation. The method comprises the following steps: adding deionized water into cerous nitrate, stirring, dropwise adding ethylenediamine, continuously stirring, and standing to obtain a precipitate; then carrying out hydrothermal reaction, cooling, centrifuging, washing and drying to obtain cerium oxide powder; dispersing in ethanol, dropwise adding a noble metal salt solution, stirring and heating to obtain solid powder; and then calcining to prepare the hydrogenated carbonate catalyst based on metal loaded cerium oxide. The catalyst prepared by an impregnation method can catalyze potassium carbonate hydrogenation to prepare potassium formate under mild conditions, and effectively solves the problems of low catalytic activity, low selectivity, unstable structure and the like of the catalyst in the prior art.