71 results about "Hydrochloric acid" patented technology

The invention belongs to the technical field of concrete. The invention relates to recycled concrete and a preparation method thereof. The recycled concrete comprises the following raw materials in parts by weight: 150-200 parts of a recycled concrete aggregate, 400-450 parts of cement, 700-800 parts of sand, 1000-1100 parts of stones, 120-150 parts of mineral powder, 50-100 parts of fly ash, 3-7parts of an expanding agent, 5-10 parts of a tackifier, 4-8 parts of a water reducing agent and 150-200 parts of water. Concrete waste is subjected to crushing, hydrochloric acid solution soaking, sodium silicate solution soaking and polyvinyl alcohol solution soaking to prepare the recycled concrete aggregate, and gaps of the concrete waste are filled, so that the mechanical property of the recycled concrete aggregate is improved. The recycled concrete prepared in the invention has excellent mechanical properties, and is suitable for constructional engineering with high requirements on concrete.

The invention relates to a novel extraction method of a plant crude drug, namely a method for extracting fucoidan polysaccharide sulfate. The name of the preparation commodity is a haikun shenxi capsule. The method comprises the following main extracting steps: (1) adding 10-fold water to a dried kelp to soak for 8 hours, controlling room temperature at 8-32 DEG C, taking a soak solution to be concentrated into 1/5 of original volume for later use, and separating out alginate on the surface of a marine organism by adopting the step; (2) taking out and cutting up the soaked kelp, and homogenating by using an AH high-pressure homogenizer; (3) adding sodium hydroxide to homogenated liquid to adjust the pH value to 12, stirring for 30 minutes, standing for 12 hours, adjusting the pH value to 1.5-2 by using a hydrochloric acid, stirring for 8 hours, and standing for 12 hours; (4) filtering; (5) merging filtrate with a concentrated solution in the step (1) and desalting by adopting specific 500 electroosmosis; (6) concentrating and decoloring soup; (7) centrifuging, and washing a filter cake by using 95% ethanol; (8) drying and crushing a dry substance. The yield is improved, and the cost is reduced. Compared with the prior art, the yield of the method is improved by over 40% by detection.

The invention relates to a method for preparing a test solution for quality detection of a safe stagnation removing preparation. The method comprises the following steps of: (1), extracting solution preparation: weighting 0.5-10.0g of solid safe stagnation removing preparation or contents thereof, adding a universal solvent for extracting alkaloid, carrying out ultrasonic treatment or heating backflow, cooling down, and filtering to obtain a filter liquid as an extract liquid for later use; or weighting 4-80ml of liquid safe stagnation removing preparation, and filtering to obtain the filter liquid as the extract liquid for later use; and (2) extract liquid purification: taking out the extract liquid, drying through steaming, dissolving residues by adding 1-10ml of hydrochloric acid solution (1-5,000) to the residues, centrifuging a mixed solution, taking out supernatant to slowly pass through an octadecylsilane bonded silica gel column (50-500mg), eluting by water of 2-30ml, collecting an effluent liquid and an eluting liquid, drying by steaming, dissolving the residues by adding 1-10ml of methanol with the volume percent of 30-100% or alcohol with the volume percent of 50-95%, standing, and taking out supernatant which is the test solution for a leonurus indexity element stachydrine hydrochloride thin layer discriminating and/or content determining method in the safe stagnation removing preparation.

The invention discloses a resin-based nano-lanthanum material and a preparation method and application thereof, and belongs to the field of environmentally functional materials. The preparation methodincludes the following steps: 1) dissolving lanthanum chloride heptahydrate and concentrated hydrochloric acid in alcohol, performing mixing, adding a resin polymer, and performing stirring at room temperature; 2) filtering the resin after completion of stirring, and performing drying; 3) adding the resin to a precipitant solution, and performing stirring at room temperature so as to filter out the resin; and 4) washing the product by using water until neutrality, adding a NaCl solution, performing stirring, filtering out the resin, and performing drying so as to obtain the resin-based nano-lanthanum material. Lanthanum is mixed with hydrochloric acid so as to make lanthanum and chloride ions form complex anions, lanthanum in the form of complex anions in alcohol is uniformly adsorbed into anion exchange resin pore channels, then the nano-lanthanum compound is further generated in situ, and the prepared nano lanthanum particles have more uniform distribution, and have a high phosphorus adsorption rate.

The invention discloses a method for synthesizing red fluorogold nano-clusters through photoinduction and application thereof and belongs to the technical field of fluorogold nano-clusters. The methodcomprises the following steps: under a room temprature condition, adding mono(6-mercapto-6-deoxy)-beta-cyclodextrin into chloroauric acid and reacting at a stirring speed of 550 to 600 rmp until a solution becomes colorless, so as to obtain a solution A; slowly adding silver nitrate into the solution A and reacting at the stirring speed of 550 to 600 rmp for 9 to 10 min; then adding lipoic acid to obtain a mixed system B; reacting at the stirring speed of 550 to 600 rmp for 9 to 10 min; then regulating the pH (Potential of Hydrogen) of the solution to 3.5 to 4.5 by adopting hydrochloric acid,so as to obtain a solution B; putting the solution B under LED (Light Emitting Diode) lamplight and reacting for 85 to 90 min, so as to obtain a light yellow solution, i.e., the red fluorogold nano-clusters Au(0)@Au(I)-6-SH-beta-CD. According to the method disclosed by the invention, a photo-reduction method takes mercapto-beta cyclodextrin as a coating agent to synthesize gold nano-clusters; anda synthesis method is simple and can be used for selectively detecting silver ions.

The invention provides an electron-grade hydrochloric acid production method. The electron-grade hydrochloric acid production method sequentially comprises the following steps that 1, synthesized hydrogen chloride gas enters an adsorption tower so as to remove free chlorine; 2, a reagent-grade hydrochloric acid solvent is adopted to enter a washing tower from the inlet in the upper part of the washing tower to wash the adsorbed hydrogen chloride gas so that soluble impurities can be removed; 3, the washed hydrogen chloride gas passes through first condensation and secondary condensation and enters a demister so as to remove mist, so that high-purity hydrogen chloride gas is obtained; 4, high-purity hydrogen chloride is absorbed by a first and a secondary falling film absorber and a tail gas absorbing tower, and then passes through a hyrochloric acid cooler, so that a finished product is obtained; 5, absorbant water adopts hyperpure water; and 6, the finished product obtained in the step 4 enters a finished product storage tank, and is ultrafiltered to remove particulate impurities, so that electronic hydrochloric acid is obtained. The electronic hydrochloric acid production methodhas the characteristics of simple technology, continuous production, good stability,simple equipment, and the like.

The invention discloses an analyzing method for quickly and precisely measuring tellurium in a tellurium smelting process. The measuring range of the tellurium in material is 20-95% of mass percent. The analyzing method for quickly and precisely measuring the tellurium in the tellurium smelting process mainly includes steps that weighing a certain amount of sample, adding a proper amount of hydrochloric acid, nitric acid and sulfuric acid dissolving sample, adding bromine water to shield As and Sb interference, and using ammonium ferrous sulfate to titrate the tellurium content under a proper amount of potassium dichromate and thiophosphate. The analyzing method for quickly and precisely measuring the tellurium in the tellurium smelting process uses standard addition test and parallel test to verify the accuracy and precision of the method; the analyzing method for quickly and precisely measuring the tellurium in the tellurium smelting process is high in precision and capable of meeting the actual needs of the analysis and detection for the tellurium content in the material in the tellurium production process.

The invention discloses a calcium citrate producing method includes following steps: (1) contacting a citric acid fermentation clear liquid with heavy calcium carbonate to obtain a crude calcium citrate crystal; (2) acidically hydrolyzing the crude calcium citrate crystal with hydrochloric acid to obtain a solution and filtering the solution; and (3) contacting a filtrate with one or more of a carbonate of alkali metals, a hydroxide of the alkali metals, an oxide of the alkali metals, ammonium carbonate and ammonium bicarbonate. The producing method can obtain the crude calcium citrate crystal precipitation directly through reaction between the simply-filtered impurity-containing crude citric acid fermentation clear liquid and the heavy calcium carbonate and then the high-purity calcium citrate, which is 99.9-99.99% in purity and can reach a standard in United States Pharmacopeia USP33-NF28 and American food additives FCC5, can be obtain just by performing one filtering process for removing impurities and performing a contact reaction between the obtained filtrate and one or more of the carbonate of alkali metals, the hydroxide of the alkali metals, the oxide of the alkali metals, the ammonium carbonate and the ammonium bicarbonate.

The invention relates to the technical field of plant effective constituent extraction and discloses an aloin extraction method. The extraction method provided by the invention comprises the following steps: peeling aloe leaves and smashing; adding hydrochloric acid methanol extracting solution homogenate with volume concentration of 1 %; leaching at a low temperature away from light and adopting ultrasonic wave for dissolving; auxiliary extracting; centrifuging at a low temperature to obtain the extraction of the aloin. The extraction method has the advantages that the method is simple, convenient and quick, the aloin extracting efficiency is improved; as the process is carried out at the low temperature all the way, the maintenance of aloin stability is facilitated.

The invention discloses a simulated accelerated test device and method of acidic marine aerosol-caused influence on steel atmospheric corrosion and belongs to the technical field of a metal material atmospheric corrosion simulated accelerated test. The method utilizes the aerosol simulated test device to carry out an indoor accelerated corrosion experiment. The method comprises preparing a NaCl solution with a concentration of 3.5%, adjusting the solution pH to 3.5 through concentrated hydrochloric acid with a concentration of 38% to obtain an original solution of the acidic marine aerosol, atomizing the solution through adjusting parameters of a solution flow control system and a gas compression system in the device to obtain aerosol liquid drops so that an acidic aerosol environment is simulated, and depositing the aerosol liquid drops on the surface of a sample through a wet settlement method for 4-32 cycles, wherein one experimental cycle comprises a wet settlement process for 10min and a natural drying process for 350min. The method for researching steel atmospheric corrosion through simulated accelerated corrosion can conveniently and fast acquire steel corrosion data in corrosion and determine acidic marine aerosol-caused influence on steel atmospheric corrosion.

Provided are a viscous acid and a preparation method thereof. The preparation method includes: adding 60.00-81.25 parts of water, 15.00-25.00 parts of 31% dilute hydrochloric acid, 0.25-1.00 part of biological activator, 0.50-4.00 parts of an acidizing corrosion inhibitor and 1.00-5.00 parts of an iron ion stabilizer into a container, dropwise adding 2.00-5.00 parts of acidizing thickener THICK-B100 under stirring, and mixing well to form a viscous acid solution; the viscous acid is 4 to 5 times as high as a conventional acid in retarding action, never causes pit corrosion near a shaft, and may cause long cracks that have excellent flow guide capacity; viscous acid gel-breaking liquid is lower than 30 mN/m in surface tension and never causes water blocking damage during flowback.

The invention discloses a method for recovering acetic acid from waste gas exhausted in production of chloroacetic acid. The recovery method can be used for recovering acetic acid from waste gas exhausted in production of chloroacetic acid. The recovery method comprises the following steps of: taking glacial acetic acid, adding a catalyst, introducing chlorine gas to obtain chloroacetic acid, and crystallizing the chloroacetic acid to obtain a finished product, wherein in the process of producing the chloroacetic acid, chlorine hydride and waste gas are generated. The chlorine hydride is absorbed by water to generate hydrochloric acid, and the waste gas is cooled, and absorbed by waste to recover acetic acid.

The invention relates to a method for recovering heavy metals in high-chlorine salt and high-acid wastewater, which belongs to the field of dangerous waste treatment and resource recycling. High-saltand high-acid wastewater undergoes hydrochloric acid resolution, adding medicine precipitation and calcium separation, neutralization and precipitation, acid-adding precipitation and zinc and lead separation, carbonate precipitation, residual heavy metal adsorption by exchange resin and evaporative crystallization, so that salt is obtained, and evaporative cooling water is used for washing metal precipitate sludge. After being treated by the method, wastewater is recycled, heavy metals are separated and recovered, crystallized chlorine salt can be adopted as a material for the chlor-alkali industry, bleaching in printing and dyeing and the like, and resource recycling of the heavy metal in the water is realized.

The invention relates to a formula and preparation method of high temperature stable emulsified acid. The formula of the high temperature stable emulsified acid comprises the following components in mass percent: 55.0-80.0 percent of 15-28% hydrochloric acid, 17.0-42.5 percent of diesel oil No. 0, 0.2-0.7 percent of an emulsifying agent, 0.2-0.5 percent of a co-emulsifier, 0.8-2.5 percent of a corrosion inhibitor, 0.2-0.5 percent of a corrosion inhibition synergistic agent and 1.0-2.0 percent of a ferric ion stabilizer, wherein the emulsifying agent is an ester with 12-18 carbon atoms and unsaturated double bonds or acetate of the ester; the co-emulsifier is sorbitan oleate; the corrosion inhibitor is a condensation compound of aldehyde, inorganic amines and cyclic ketones; the corrosion inhibition synergistic agent is cuprous chloride, potassium iodide, formamide or pyroantimonate; and the ferric ion stabilizer is nitrilotriacetic acid or sodium erythorbate. According to the formula disclosed by the invention, the corrosion inhibitor and the emulsifying agent have good compatibility, the preparation technology is simple, the operation is convenient, and the quality of the emulsified acid is easily controlled.

The method of further recovering L-tyrosine from the effluent produced by L-cystine is to adjust the collected effluent produced by protein hydrolysis to pH = 2-3, and make it flow through Treat it as a granular activated carbon column with pH = 3-4, elute the activated carbon column with 3-7% NaOH solution, neutralize the eluent with concentrated hydrochloric acid to pH = 5.5-8.5, and separate the crude L-tyrosine. It is decolorized and refined to obtain the finished product of L-tyrosine. The invention solves the problems of low yield and low purity of the L-tyrosine product in the existing production method.

The invention provides a making method and a use of silica constructed superhydrophobic melamine sponge. The method comprises the following steps: 1: cleaning melamine sponge: cleaning the melamine sponge in hydrochloric acid, washing the melamine sponge with water until the melamine sponge is neutral, and drying the washed melamine sponge; 2, preparing an aqueous vinyltriethoxysilane dispersion: adding an ethyltriethoxysilane additive into deionized water, and fully stirring the ethyltriethoxysilane additive and the deionized water to obtain the aqueous vinyltriethoxysilane dispersion; and 3, making the silica constructed superhydrophobic melamine sponge: immersing the melamine sponge obtained in step 1 in the aqueous vinyltriethoxysilane dispersion obtained in step 2, dropwise adding ammonia water, and drying the melamine sponge to obtain the silica constructed superhydrophobic melamine sponge. The melamine sponge used as the sponge has rich sources and a low price.

The invention discloses a degradation method of polymer procyanidins. The degradation method comprises the following steps: adding 5 to 10 times volume of lithium hydroxide aqueous solution with masspercent of 1 to 5 percent into the polymer procyanidins, carrying out stirring reaction at the temperature of 60 to 80 DEG C for 10 to 30 minutes and adding hydrochloric acid to terminate the reaction; then concentrating and freeze-drying. Oligomeric procyanidins obtained by the method has the advantages of high content, low polymerization degree, improved water solubility, reduced turbidity and high recovery rate; in addition, the oligomeric procyanidins can be applied to the fields of food, medicine, cosmetics and the like which have higher water-solubility requirements and the application range of the oligomeric procyanidins is expanded. The method is simple in process, and has low requirements on personnel and equipment in the implementation process; the used organic solvents have lowprice and can be recycled, so that the cost is low; after degradation, the content of the oligomeric procyanidins is increased and invariance of compositions in the raw materials can be ensured.

The invention relates to anti-corrosion acrylic acid epoxy resin powder paint for ceramic. The paint comprises the following raw materials: glycidyl methacrylate, polyol, azobisisobutyronitrile, monoacid, di-tert-butyl peroxide, dicyclopentadiene, an initiator, maleic anhydride, epoxy resin, zinc oxide, a flatting agent, 1-o-tolylbiguanide, dodecanedioic acid, 2-mercaptobenzothiazole and titanium dioxide. According to the paint, the melting point is 200-220 DEG C, the density is 135-145g/cm<3>, and the paint has no abnormity after being soaked in 5% hydrochloric acid solution for 20-30d; the glossiness is 140%-150%, and after the artificial accelerated aging is implemented for 500h, the gloss retention rate is 94-98%; the shore hardness is 50-70H, the drying time is 20-30min, the paint cannot bubble or crinkle after being soaked in saturated calcium hydroxide for 15-35d, and the scrubbing resistance times are 1800-2200.