19results about How to "Reduce acidity" patented technology

The application discloses a phosphorus-carrying catalyst regeneration waste liquid recycling treatment method and device, and aims to solve the technical problem of how to better control the acidity of the regeneration liquid to maintain the service life of the phosphorus-carrying catalyst, realize the recycling of the regeneration liquid and the concentration reduction of the phosphorus resource, and reduce the treatment difficulty of the regeneration waste liquid. The method comprises the following steps: introducing the phosphorus-carrying catalyst regeneration waste liquid into an adsorption device filled with a regeneration waste liquid phosphorus removal adsorbent, separating the phosphorus component in the phosphorus-carrying catalyst regeneration waste liquid, collecting the effluent as a phosphorus-lean regeneration liquid, recycling the phosphorus-lean regeneration liquid for the regeneration of the phosphorus-carrying catalyst, and mainly using the phosphate as the phosphorus component; when the regeneration waste liquid phosphorus removal adsorbent is saturated, hot water is used as a desorption medium to replace the liquid in the adsorption device, the volume of the desorption medium is controlled to be less than the volume of the phosphorus-carrying catalyst regeneration waste liquid that can be contained in the adsorption device, and the regeneration waste liquid phosphorus removal adsorbent is eluted.

The invention provides a clear and strong flavor type white spirit and a brewing method thereof. The brewing method of the clear and strong flavor type white spirit comprises the following steps: adding grain flour into long-fermentation-period strong flavor type fermented grains for moistening grains, adding steamed rice husks, and distilling to obtain strong flavor type distillers' grains and strong flavor type raw wine I; distilling the Sichuan fen-flavor fermented grains to obtain fen-flavor distillers' grains and fen-flavor raw wine II; the strong-flavor vinasse is subjected to acid brewing, out-of-steamer, water metering, airing and cooling, and wine brewing koji is added for heap fermentation; cooling the fen-flavor distillers' grains and adding wine brewing yeast; mixing the strong-flavor distillers' grains subjected to stacking fermentation with the fen-flavor distillers' grains added with the wine brewing yeast, and fermenting in a cellar; and distilling the fermented mixed distillers' grains to obtain the wine, thereby obtaining the clear and strong flavor type raw wine III. The Sichuan-style fen-flavor vinasse can partially replace rice husks, the brewing cost is reduced, the alcohol cleanliness of a wine body is increased, the problem that fusel oil is high when the Sichuan-style fen-flavor vinasse is independently produced is solved, and the problem that long-fermentation strong-flavor vinasse is difficult to produce wine is also solved.

The invention provides a brewing and deacidification method of aroma-enhanced passion fruit wine, belongs to the technical field of fruit wine, and solves the technical problems of high acidity, poor taste and the like of existing fruit wine. According to the brewing and deacidification method of the aroma-enhanced passion fruit wine, passion fruits harvested in a grading mode are cleaned and then added into a smashing box to be smashed, and fruit pulp is obtained for use; the method comprises the following steps: cleaning glutinous rice, soaking the cleaned glutinous rice in water for 3-5 hours, steaming the cleaned glutinous rice, sprinkling water to cool the steamed glutinous rice, then adding the steamed glutinous rice into an enzymatic hydrolysate, adding a composite yeast agent into the enzymatic hydrolysate, and uniformly stirring to obtain a fermentation substrate; adding the fermentation substrate, distiller's yeast and fruit pulp into a fermentation tank, adding an acid reducing agent, and carrying out sealed fermentation; after the fermentation is completed, precipitating and filtering the passion fruit wine, then feeding the passion fruit wine into a storage tank for storage, sealing the precipitate after precipitation, and then filtering the passion fruit wine. The method has the advantages that the acidity of the passion fruit wine is reduced, the flavor of the passion fruit wine is improved, the filtering pressure is reduced, and the quality is improved.

The application discloses a dehydrogenation catalyst and a precursor, a preparation method and application thereof. The dehydrogenation catalyst precursor is obtained through the following steps: mixing an aqueous solution of a precipitant and an aqueous solution of a metal salt to perform a precipitation reaction; and then performing post-treatment. The aqueous solution of the metal salt comprises a copper salt and a carrier alkaline earth metal salt. The temperature of the precipitation reaction is 30-90 DEG C. The end point pH value of the precipitation reaction is 6.0-10.0. The dehydrogenation catalyst precursor comprises an active component precursor and a carrier. The active component precursor is copper oxide. The carrier is one or more of alkaline earth metal oxides. The content of the copper oxide is 10%-75%. The content of the carrier is 5%-51%. The NH3 adsorption amount of the dehydrogenation catalyst precursor is less than 90 umol / g. The dehydrogenation catalyst obtained by reducing the dehydrogenation catalyst precursor is applied to a dehydrogenation reaction for preparing methyl isobutyl ketone. The temperature of the dehydrogenation reaction is 200-300 DEG C. The pressure of the dehydrogenation reaction is 0-0.5 MPa, and the dehydrogenation catalyst has high conversion rate and selectivity.

This invention relates to a method for detecting metal elements in electronic-grade boron-aluminum doped source samples. The method includes microwave digestion of the sample and inductively coupled plasma atomic emission spectrometry (ICP-AES) to detect the metal element content. By optimizing sample pretreatment and instrument detection conditions, this invention achieves high-precision determination of multiple metal elements in electronic-grade boron-aluminum doped sources. The accuracy, precision, and sensitivity of the detection results meet the requirements for ultra-trace detection of semiconductor-grade and photovoltaic-grade boron-aluminum doped sources.

The application discloses a method for producing Ac-225 mother liquor by irradiating a thorium target, and comprises the following steps: dissolving the irradiated thorium target to obtain an irradiated thorium target solution; separating and removing thorium and Ac in the irradiated thorium target solution to obtain a Ra crude product liquid; passing the Ra crude product liquid through a TK102 resin column, washing the TK102 resin column with a 2.5-3.5 mol / L hydrochloric acid solution for 13-15 column volumes, and obtaining a Ra elution liquid; placing the Ra elution liquid for a set time, diluting the Ra elution liquid, and making the hydrochloric acid concentration in the Ra elution liquid reach 0.01-0.05 mol / L to obtain a dilution liquid; passing the dilution liquid through a TK101 resin column, collecting the effluent; washing the TK101 resin column with 0.01-0.05 mol / L hydrochloric acid, and collecting the washing liquid; and mixing the effluent and the washing liquid to obtain the Ac-225 mother liquor product.

The invention belongs to the field of identification of pichia aldriavzevii, and particularly relates to an identification method and application of pichia aldriavzevii with high tolerance, reduced malic acid and ethanol production, and the preservation number of the pichia aldriavzevii strain is CGMCC No. 22929. The identification method comprises the following steps: carrying out molecular identification through ITS sequence amplification sequencing; the temperature, ethanol, acid and osmotic pressure tolerance is evaluated by measuring the growth condition of the strain in a YPD culture medium containing ethanol, pH-malic acid combination and sodium chloride at different temperatures; by measuring the malic acid degradation rate and the ethanol yield of the strain in a malic acid-containing culture medium, the acid reduction and ethanol production capacities of the strain are evaluated. The strain can tolerate the high temperature of 50 DEG C, 15.2% vol ethanol, pH 3.5 and 46.8 g / L sodium chloride, and can effectively degrade malic acid and improve the yield of ethanol. The method is suitable for solving the problem of food fermentation caused by too high malic acid content and has good application prospects.

The application relates to a preparation method of liquid bio-fermented feed, liquid bio-fermented feed and bio-fermented emulsion liquid feed, belonging to the technical field of feed preparation. The preparation method of the present application may overcome physiological problems of weaned piglets such as insufficient gastric acid secretion, low content and activity of digestive enzymes, incomplete development of immune system, disorder of intestinal microecosystem and the like. The prepared bio-fermented liquid feed has good palatability and high nutrition, easy digestion, low acidity and is a liquid feed similar to breast milk, which can both effectively alleviate the weaning stress syndrome of piglets, and realizes the perfect transition from breast milk to conventional solid feed.

This invention discloses a dry gas hydrogenation catalyst and its preparation method. The support component is alumina, and the active components are Group VIB metal sulfides and Group VIII metal sulfides. The average number of lamellar layers of the sulfides is <1.5 layers, and the proportion of single layers is 65%~80%. Based on the weight of the catalyst, Group VIB metal sulfides account for 1wt%~20wt% of the total mass of the catalyst, and Group VIII metal sulfides account for 0.5wt%~10wt% of the total mass of the catalyst. The total acid content of the catalyst is 0.1~0.25 mmol / g, of which the strong acid content at 400-500℃ accounts for 1%~6%, the medium-strength acid content at 250-400℃ accounts for 10%~20%, and the weak acid content at 150-250℃ accounts for 74%~89%. The preparation method is as follows: Boehmite dry adhesive powder is calcined at high temperature in an oxygen-containing atmosphere. The alumina dry adhesive powder is then impregnated with an active component impregnation solution, dried, and calcined at high temperature in an oxygen-containing atmosphere. Finally, it is calcined in a mixed atmosphere of H2S and H2. After molding, drying, and calcination, a dry gas hydrogenation catalyst is obtained. The catalyst of this invention exhibits good hydrogenation performance for organic sulfur and olefins, and also possesses excellent resistance to carbon deposition.

This utility model relates to the technical field of boiler degassing, and in particular to a degassing assembly and its electrode boiler, comprising: a degassing vessel, supported on the ground, with a degassing chamber inside and an outlet connected to the top of the degassing vessel; a filtration mechanism, connected to the outlet of the degassing vessel, for filtering the gas; wherein the degassing vessel includes: a heating cylinder, disposed inside the degassing vessel, with multiple connecting rods arranged circumferentially on the outer wall of the heating cylinder, the heating cylinder being fixedly installed inside the degassing vessel via the connecting rods; a water pump, fixedly installed on the outer wall of the degassing vessel, the water pump input end for drawing in boiler water, and the water pump output end connected to a water supply pipe; and an annular spray pipe, disposed inside the degassing vessel, connected to the water supply pipe, with multiple spray nozzles arranged annularly on the inner wall of the annular spray pipe, each spray nozzle being located at the top of the heating cylinder.

The invention relates to the technical field of organic synthesis and discloses a Sr-composite molecular sieve catalyst as well as a preparation method and application thereof. The prepared ZSM-5 and SAPO-34 are subjected to composite modification, and the binder, the filler and the peptizing agent are introduced, so that the mechanical strength, the thermal stability and the forming performance of the catalyst are improved; by introducing the Sr metal salt, the too strong acidity of the molecular sieve can be reduced, side reactions caused by the too strong acidity are reduced, generation of carbon deposition can be inhibited, the catalyst can keep good stability in the long-term reaction process, and the service life of the catalyst is prolonged. The Sr-composite molecular sieve catalyst prepared by the method has the characteristics of excellent catalytic activity, high low-carbon olefin selectivity, strong stability and long service life, is highly in line with large-scale industrial production requirements, and shows remarkable economic value and wide industrial application prospects.

This utility model relates to the technical field of electroplating waste liquid recycling and regeneration device, and discloses an electroplating waste liquid recycling and regeneration device, including an electrolytic cell. The upper part of the electrolytic cell is a cathode tank, in which a cathode copper plate is disposed. The lower part of the electrolytic cell is an anode tank, in which an anode copper plate is disposed. The cathode copper plate is connected to the cathode of a power supply, and the anode copper plate is connected to the anode of the power supply. An anion exchange membrane is fixedly arranged inside the electrolytic cell. The anion exchange membrane is used to filter and separate the required cations, so that the cations in the cathode tank cannot pass through the anion exchange membrane and enter the anode tank. During the treatment process, the acidic substances in the waste liquid are oxidized into water, which forms bubbles on the anode and is discharged through vacuum, further reducing the acidity and harmful substance content of the wastewater and mitigating environmental pollution.

This invention discloses a dry gas hydrogenation catalyst and its preparation method. The catalyst includes an alumina support component, active components consisting of Group VIB and Group VIII metal sulfides, and active agent a in a metallic state selected from one or more of Cu, Ag, Ni, Co, W, and Mo. Active agent b is in an oxidized state consisting of one or more of Li, Na, K, Cs, Mg, and Ca. The preparation method is as follows: Boehmite dry gel powder is calcined, impregnated with an active component impregnation solution, dried, calcined again, and then calcined in a mixed atmosphere of H2S and H2 to obtain powder E; the boehmite dry gel powder is impregnated with active agent a impregnation solution, dried, and calcined in a hydrogen atmosphere to obtain powder F; powder E and F are mixed, active agent b impregnation solution is added, and the mixture is shaped, dried, and calcined to obtain the dry gas hydrogenation catalyst. The catalyst prepared by this method exhibits good performance in removing impurities such as oxygen, CO, and CO2, and suitable olefin hydrogenation saturation performance, effectively improving catalyst lifetime.

The invention provides a deferrization agent and a preparation method and application thereof.The method comprises the steps that S1, molecular sieve powder, alumina powder, carbon powder, a first surface active agent, silica sol, ammonium phosphate and acid are mixed and kneaded for 30-60 min, then forming and drying are conducted, and a precursor is obtained; s2, carrying out modification treatment on the precursor in a mixed aqueous solution of quaternary ammonium base and a second surfactant for 0.5-2 hours, and roasting the obtained modified precursor to obtain a deferrization agent; and the acid amount of the deferrization agent is further limited. The deferrization agent prepared by the method can effectively remove inorganic iron and organic iron (especially petroleum acid iron) in hydrocarbon raw materials, and high deferrization efficiency is achieved.

The application discloses a 6-methyl-nicotine salt preparation and a preparation method, a mouth-containing product, an atomization substrate and an electronic atomization device thereof. The preparation method comprises the following steps: mixing 6-methyl-nicotine and an alicyclic hydrocarbon carboxylic acid, and reacting to obtain the 6-methyl-nicotine salt preparation at a reaction temperature of 30 DEG C to 80 DEG C, wherein the boiling point of the alicyclic hydrocarbon carboxylic acid is 200 DEG C to 265 DEG C. In the application, the 6-methyl-nicotine salt preparation is prepared by using the alicyclic hydrocarbon carboxylic acid and the 6-methyl-nicotine, and has the advantages of good taste, good safety and low corrosion.

This invention belongs to the field of food fermentation and functional beverage technology, specifically relating to a strain of *Lactobacillus fermentans* and its application in the preparation of fermented goji berry juice that enhances immunity. The *Lactobacillus fermentans* strain LFY21 was deposited on November 17, 2025, at the China Center for Type Culture Collection (CCTCC), with accession number CCTCC NO: M 20252569; the deposit address is Wuhan University. This strain grows vigorously in goji berry juice, but exhibits weak acid production during fermentation, resulting in a high sugar-acid ratio, good flavor and palatability, and high free radical scavenging activity and total phenol content. Furthermore, animal experiments have demonstrated that fermented goji berry juice prepared with this strain can effectively enhance immune function, showing potential as an immune enhancer.

The invention relates to a method for decolorizing waste cotton-polyester blended fabric through low-temperature plasma synergistic chemical oxidation. Through the synergistic effect of low-temperature plasma and an acidic chemical oxidant (composed of inorganic acid, hydrogen peroxide, a penetrant and a hydrogen peroxide stabilizer), color development and auxochrome groups of dye on the waste polyester-cotton blended fabric are effectively destroyed, and efficient decolorization of the waste polyester-cotton blended fabric is achieved. According to the technical scheme, the decolorizing efficiency is improved, the original performance of polyester and cotton fibers can be reserved, the secondary utilization performance of the recycled waste polyester-cotton mixed textile fabric is guaranteed, and an effective means is provided for resource utilization of the waste polyester-cotton mixed textile fabric. Compared with a traditional chemical oxidation technology, the method has the advantages that the required acid amount and treatment time are remarkably reduced, the temperature required by the reaction is greatly reduced, the environmental protection performance is remarkably improved, the energy consumption is reduced, and an economic and green new way is provided for recycling the waste polyester-cotton mixed textiles.

The utility model belongs to the field of dibenzoyl peroxide preparation, and provides a dibenzoyl peroxide preparation device with reduced acidity, which comprises a reaction kettle body, a feed pipe fixedly communicated with the upper end of the reaction kettle body and a discharge pipe fixedly communicated with the lower end of the reaction kettle body, the effect of compressing the spring can be achieved by pressing the pressing block downwards above the sampling tube, at the moment, the sliding rod pushes the connecting block to move downwards, the sealing plug is separated from the sampling tube, then a dibenzoyl peroxide solution enters the sampling tube, after the pressing block is loosened, the spring recovers to the initial state, and at the moment, the sealing plug blocks the sampling tube; the sampling tube can be taken out of the reaction kettle body by moving the sampling tube upwards, so that the pH value of the sampled dibenzoyl peroxide can be conveniently detected, and the acidity of the dibenzoyl peroxide solution can be conveniently and continuously reduced.

The invention relates to the technical field of high-purity chemicals, and provides a preparation method of high-purity propylene glycol methyl ether acetate. The method comprises the following steps: mixing propylene glycol monomethyl ether, acetic acid and a catalyst to carry out a first-stage reaction, mixing the obtained first reaction liquid with alkali metal to carry out a second-stage reaction, and rectifying the obtained second reaction liquid to obtain the high-purity propylene glycol methyl ether acetate. The alkali metal is added into the reaction liquid obtained in the first-stage reaction, so that the acidity of the product can be reduced, and the key problem that the acidity is relatively high in an esterification synthesis route of propylene glycol methyl ether acetate is solved; unreacted propylene glycol monomethyl ether can be converted into propylene glycol monomethyl ether alkali metal salt with a relatively high boiling point, and the separation difficulty of impurities and a target product can be reduced in subsequent rectification; in addition, hydrolysis of the generated propylene glycol methyl ether alkali metal salt can further promote esterification reaction. The method provided by the invention is simple in required rectification device, high in product purity, low in water content and wide in prospect.