26results about How to "Increase acidity" patented technology

This invention relates to the field of broad bean paste technology and discloses a low-salt broad bean paste production process based on the synergistic fermentation of compound microorganisms. The process includes: uniformly mixing broad bean koji with drained chili embryos to obtain a solid mixture; spraying an A-phase initiation conditioning solution onto the solid mixture and inoculating it with *Lactobacillus plantarum*, mixing until moistened to obtain a primary fermentation mash; controlling the primary fermentation mash to undergo constant-temperature fermentation until the pH value drops to a preset acidic range to obtain an acidified mature mash; injecting a B-phase hypertonic regulating solution into the acidified mature mash and inoculating it with *Tetracoccus halophilus* and *Zygosacchariformis*, mixing uniformly to obtain a phase-inversion fermentation mash; cooling the phase-inversion fermentation mash and conducting anaerobic fermentation under air-isolated conditions to obtain the low-salt broad bean paste product. This invention solves the problems of insufficient umami and softening in low-salt fermentation by segmented salt control driving synergistic succession of microorganisms, combined with chemical regulation to protect enzyme activity and enhance texture, significantly improving the flavor and taste of the product.

This invention discloses a USY molecular sieve, its preparation, and its application. The USY molecular sieve has the following properties: mesoporous pore volume accounts for 30%–60% of the total pore volume; the total acid content is 400–480 μmol / g at 200℃ and 120–150 μmol / g at 350℃. When the molecular sieve of this invention is used as a hydrocracking catalyst, both the catalyst activity and selectivity are significantly improved.

This invention discloses a strain of *Pediococcus pentosaceus* RL-10 and its application in bio-acidification rice soaking and bacterial cellulose production, belonging to the field of microbial technology. The preservation number of *Pediococcus pentosaceus* RL-10 is CCTCC NO: M 20252428. This invention is the first to use *Pediococcus pentosaceus* as a strain for bio-acidification rice soaking. Using rice soaking water as a production substrate, *Acetobacter Hansenulatus* and strain RL-10 are co-cultured in situ to produce bacterial cellulose loaded with antimicrobial peptides. Under certain process conditions, acidification of rice soaking by strain RL-10 can rapidly increase acidity and shorten soaking time. The bacterial cellulose production process of this invention is simple and low-cost; verification shows that the bacterial cellulose prepared by the method of this invention has high yield and good antibacterial activity, meeting the requirements of large-scale industrial production.

The application discloses a preparation method of oat plant-based fermented milk rich in polyphenols based on a combined enzymolysis-fermentation technology. The preparation method comprises the following steps: after oat is soaked and cleaned, the oat is dried to obtain pretreated oat; the pretreated oat is baked and crushed, and then ball milled to obtain oat ultrafine powder; then, water is added to the oat ultrafine powder to obtain oat milk, the oat milk is stirred and subjected to high-speed shearing, the oat milk is completely dissolved and then gelatinized, and then enzyme is added to perform enzymolysis to obtain an enzymolysis solution; after the enzyme is inactivated, the enzymolysis solution is mixed and homogenized to obtain a homogenized solution, the homogenized solution is sterilized and cooled to obtain a uniform and stable system; finally, a strain is inoculated into the uniform and stable system to perform fermentation and post-ripening to obtain oat plant-based fermented milk. According to the preparation method, a nitrogen source does not need to be additionally added, the polyphenol content of the system and the acidity of the product can be effectively improved, and the fermentation time is shortened.

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.

This invention belongs to the field of electrode material technology, specifically relating to an anode foil, its preparation method, and an aluminum electrolytic capacitor. The preparation method of the anode foil includes performing a secondary porosimetry etching on the aluminum foil after primary porosimetry etching. The secondary porosimetry etching includes multiple stages of porosimetry etching, with a mid-treatment process between each adjacent stage. This preparation method involves multiple stages of porosimetry etching, and the mid-treatment process between each adjacent stage effectively increases the pore size of the etched foil, making it suitable for preparing ultra-high voltage anode foils with low loss and high specific capacitance.

This invention discloses a synthesis process for methylal, belonging to the field of methylal technology, comprising the following steps: In a reactor, formaldehyde and methanol are reacted at a molar ratio of 1:1.5-4.5 under the action of an organic-inorganic composite solid acid catalyst at 50-75°C for 40-240 min, with the reflux ratio controlled at 1-4:1, and the fraction collected at 40-46°C from the top of the column to obtain industrial-grade methylal product; the organic-inorganic composite solid acid catalyst is phosphotungstic acid supported on multi-component mesoporous microspheres grafted with sulfonic acid-based acrylamide. The methylal synthesis process provided by this invention uses an organic-inorganic composite solid acid catalyst to synthesize industrial-grade methylal. This organic-inorganic composite solid acid catalyst is easy to separate from the product, has low corrosiveness to equipment, high catalytic effect, wear resistance, and good recyclability, making it a novel, efficient, green, and environmentally friendly production method.

This invention provides a supported noble metal catalyst, its preparation method, and its application, belonging to the field of industrial flue gas catalytic purification technology. The supported noble metal catalyst provided by this invention includes a cordierite support and a platinum catalyst bonded to the surface and pores of the cordierite support by a binder. The platinum catalyst includes a support and an active component and an active agent supported on the surface of the support. The active component is elemental Pt and Pt oxides; the active agent is one or more of tungsten oxide, molybdenum oxide, and vanadium oxide. The supported noble metal catalyst provided by this invention exhibits excellent sulfur and water resistance, is not easily deactivated, and has high catalytic efficiency.

The invention discloses a silicon-aluminum material and a preparation method thereof. After being roasted at 500-700 DEG C, the silicon-aluminum material has the following properties: the content of silicon dioxide is 20-75wt%, and the pore volume is 0.70-1.5 mL / g; and the specific surface area is 280-400 m < 2 > / g. The preparation method of the silicon-aluminum material comprises the following steps: (1) uniformly mixing a silicon-containing compound A, an auxiliary agent A, an aluminum-containing compound and water to obtain a material flow A; (2) carrying out heat treatment on the material flow A in the presence of organic amine to obtain a material flow B; (3) uniformly mixing a silicon-containing compound B, an acidic aluminum-containing compound, an alkaline aluminum-containing compound and water, and treating to obtain a material flow C; (4) mixing the material flow C with an auxiliary agent B to obtain a material flow D; and (5) mixing the material flow B and the material flow D, carrying out hydrothermal treatment, and then washing, drying and roasting to obtain the silicon-aluminum material. The provided silicon-aluminum material shows certain molecular sieve characteristics, has the characteristics of high B acid content and stepped pore channel distribution, and is especially suitable for being used as a carrier of a hydrogenation catalyst.

The application provides a resolution method of clemastine fumarate intermediate, comprising the following steps: 1) reacting racemic N-methyl-2-(2-chloroethyl)pyrrolidine with a chiral resolving agent in a first organic solvent to obtain a diastereomeric salt solution; 2) purifying the material after the reaction in step 1) by cooling and crystallization, and filtering to obtain R-N-methyl-2-(2-chloroethyl)pyrrolidine resolving agent salt; 3) dissolving the R-N-methyl-2-(2-chloroethyl)pyrrolidine resolving agent salt obtained in step 2) in a second organic solvent-water two-phase system, adjusting the pH value to 9-13, then separating the organic phase, and concentrating to obtain R-N-methyl-2-(2-chloroethyl)pyrrolidine; wherein the chiral resolving agent is at least one selected from L-di(3,5-dinitrobenzoyl) tartaric acid and L-di-p-chlorobenzoyl tartaric acid. By using a specific chiral resolving agent, the resolution efficiency of racemic N-methyl-2-(2-chloroethyl)pyrrolidine is significantly improved, and combined with cooling and crystallization and two-phase acid adjustment replacement, the operation is simple, and the cost is controllable.

This invention provides a strain of *Lactiplantibacillus plantarum* OLp4 from the deep sea of ​​the South China Sea. This strain was deposited on February 28, 2024, at the Guangdong Provincial Microbial Culture Collection Center (GDMCC), located in Guangzhou, with accession number GDMCCNo: 64378. This invention also provides an application of this *Lactiplantibacillus* strain in converting curcumin to tetrahydrocurcumin. The *Lactiplantibacillus* strain of this invention is easy to culture, grows rapidly, has strong acid-producing capacity, and exhibits extremely strong acid resistance.

The invention discloses a composite modified ZSM-5 molecular sieve and a preparation method thereof. The composite modified ZSM-5 molecular sieve comprises a phosphorus oxide, manganese oxide and a B-Al-ZSM-5 molecular sieve, and the absolute value of the difference between the crystal bulk phase silica-alumina ratio measured by XRF and the crystal surface silica-alumina ratio measured by EDS of the composite modified ZSM-5 molecular sieve is less than or equal to 1. The preparation method of the composite modified ZSM-5 molecular sieve comprises the following steps: impregnating a B-Al-ZSM-5 molecular sieve with a phosphorus-containing compound, and impregnating with a manganese-containing compound to obtain the composite modified ZSM-5 molecular sieve. The B, P and Mn three-element composite modified molecular sieve is prepared in the absence of a template agent and an organic additive, can be used in catalytic cracking, catalytic cracking and other reactions, and has the characteristics of high conversion rate, good low-carbon olefin selectivity and the like.

The application discloses a preparation method of silica nano-aerogel heat-insulating paper, which comprises the following steps: (1) covering a permeable membrane interlayer on the surface of each fiber paper; (2) preparing a silica aerogel prepolymer mixed solution; (3) compounding the silica aerogel prepolymer mixed solution with the fiber paper to obtain wet silica aerogel paper; and (4) performing solvent replacement, hydrophobic modification and drying on the wet silica aerogel paper. The aerogel paper is prepared by covering the permeable membrane interlayer on the surface of the fiber paper and applying gravity in the gel process, so that the problems of the brittleness of the aerogel itself, the low strength of the fiber material itself, the damage of the prepared ultra-thin aerogel paper (less than or equal to 0.3 mm) and the like are solved, the gel absorption amount of the fiber paper is effectively controlled, and the flatness, thickness and thickness size deviation of the aerogel paper are ensured; and the prepared silica nano-aerogel heat-insulating paper is flat in appearance and free of defects such as wrinkles, holes and cracks which affect use.

This invention relates to the field of soil remediation, and more particularly to a highly efficient remediation agent for acidic soils and its preparation method. The remediation agent consists of hydroxyapatite-modified biochar, MOF biochar composite, and lime. Compared with existing technologies, this invention not only regulates soil acidity but also provides abundant nutrients and improves soil structure. Lime can rapidly neutralize hydrogen ions in acidic soils, quickly increasing soil pH, enabling the remediation agent to improve soil acidity in a short time while achieving both short-term and long-term remediation effects. The raw materials for biochar preparation include agricultural waste such as cow dung, which are widely available and inexpensive, realizing the resource utilization of waste. Lime is also a common soil conditioner, relatively inexpensive and readily available, helping to reduce the overall production cost of the remediation agent and improve its economic feasibility and application scope.

This invention provides a method for regenerating and reusing copper nitrate stripping wastewater. The method includes the following steps: providing copper nitrate stripping wastewater; mixing the wastewater with additives and electrolyzing it to obtain metallic copper and an electrolyzed solution; the additives include sulfamic acid and urea; and replenishing the electrolyzed solution with acid to obtain a regenerated copper nitrate stripping solution. This invention adds sulfamic acid and urea, which are well-compatible with the copper nitrate stripping wastewater, as additives. Through their synergistic effect, the efficiency of copper extraction via electrolysis is significantly improved, achieving high-efficiency and high-value copper recovery, and increasing the acidity of the electrolyzed solution. Furthermore, only a small amount of acid replenishment is needed to restore the copper stripping capacity, greatly reducing acid consumption and achieving low-cost recycling. This method is simple, has a high resource recovery rate, and can effectively reduce the raw material and environmental costs of the copper stripping process, offering both economic and environmental benefits.

The invention discloses a preparation method of a eucalyptus cellulose carbon-loaded monatomic Ir catalyst, which comprises the following steps: by taking delignified eucalyptus cellulose as a raw material, pyrolyzing in an inert atmosphere at 600-900 DEG C to prepare a carrier material, and then loading metal Ir on the carrier material to prepare the carbon-loaded monatomic catalyst IrSACs / C; the catalyst is applied to hydrodeoxygenation reaction of aldehyde compounds or ketone compounds, and has the characteristics of mild reaction conditions, high selectivity and excellent cycle stability. Compared with the prior art, the catalyst prepared by the method provided by the invention has the characteristics of high specific surface area and low Ir loading capacity, and the Ir can realize atomic-scale dispersion on the carrier; the catalyst is wide in raw material source and simple in preparation method, and a new way is provided for simple synthesis of an efficient monatomic catalyst for biomass hydrodeoxygenation under mild conditions.

This application provides a *Hansophila barley* 3CC20 strain, its preparation method, and its applications. The *Hansophila barley* 3CC20 strain has the accession number CGMCC28442. A bacterial suspension or starter culture is prepared using *Hansophila barley* 3CC20. The suspension or starter culture is then applied to meat pieces or ham at an inoculation rate of 3% or 5% of the meat weight, and fermented in a constant temperature and humidity incubator for a predetermined time. This application enables the extraction of *Hansophila barley* 3CC20 from the surface and shallow layers near the surface of fermented meat products. Furthermore, *Hansophila barley* 3CC20 exhibits high salt tolerance, nitrate tolerance, acid tolerance, strong acid production capacity, and strong antioxidant properties. *Hansophila barley* 3CC20 promotes meat product fermentation, shortens the meat product production cycle, ensures the hygiene and safety of meat products, and maintains the original unique flavor of fermented meat products.

This invention provides a method for efficiently removing arsenic and separating and recovering zinc and cadmium from arsenic-containing waste acid, comprising the following steps: filtering the arsenic-containing waste acid solution to remove suspended solids and particulate impurities, and then performing diffusion dialysis to allow H₂ to form a solution. + The arsenic is separated from metal ions to obtain recovered acid and residual acid containing metal ions. The residual acid is added to an autoclave along with an iron salt coagulant, and oxygen or air is simultaneously introduced to carry out a high-pressure oxidation precipitation reaction. After the reaction, liquid-solid separation is performed to obtain arsenic-containing precipitate and arsenic-precipitated liquid. The arsenic-precipitated liquid is added to carbide slag water for neutralization treatment to obtain gypsum slag and neutralized liquid. Zinc powder is added to the neutralized liquid for displacement, and after liquid-solid separation, sponge cadmium and zinc sulfate solution are obtained. This invention uses high-pressure oxidation precipitation of arsenic, which has a better arsenic precipitation effect. The arsenic content in the precipitated liquid is extremely low and a stable arsenic-containing precipitate is formed, which can be safely stored for a long time. At the same time, zinc and cadmium are recovered, realizing the high value of zinc and cadmium elements, and no wastewater is generated in the whole process.

The invention provides an extraction method of wheat lutein, and belongs to the technical field of agricultural product processing and natural product extraction. The extraction method comprises the following steps: mixing a wheat processing powder product with an n-butyl alcohol and water mixing system to obtain a wheat solvent system; and mixing the wheat solvent system with an acid solution, and heating and extracting to obtain the wheat xanthophyll. Under the condition of acid catalysis, acid can promote ester bond breakage by releasing protons, hydrolysis of ester can be effectively promoted, release of combined xanthophyll can be promoted, the extraction amount of xanthophyll can be increased, and meanwhile, the acid can also inhibit oxygenolysis of xanthophyll. Heating extraction is carried out in xanthophyll extraction, the acid action effect can be improved, solvent permeation is accelerated, and the xanthophyll extraction efficiency can be further improved. Results of the embodiment of the invention show that the extraction efficiency of xanthophyll in different varieties of wheat flour can be remarkably improved by adopting the extraction method compared with a conventional method.

This application discloses a method for preserving the aroma and optimizing the bubbles in prickly pear sparkling wine using mannoprotein. During the secondary fermentation stage of the prickly pear sparkling wine, mannoprotein is added to the fermentation system at an amount of 200-600 mg / L. This application addresses the problems of monotonous aroma and poor bubble quality in existing prickly pear sparkling wines.

The application relates to a technical field of a Jinggang honey pomelo special organic fertilizer treatment mechanism, in particular to a Jinggang honey pomelo special organic fertilizer treatment mechanism and a preparation method thereof, which comprises a drying box, an air inlet shell is communicated with the top of the drying box, a heater is arranged in the air inlet shell, an exhaust pipe is communicated with the top of the drying box, and the other end of the exhaust pipe is communicated with a first air pump; through the setting of an auxiliary mechanism, a treatment structure and a double-spiral stirring machine, organic fertilizer particles after drying treatment can be mixed with slaked lime and soil, so that large-area fertilization of a Jinggang honey pomelo special planting area can be more adapted, the operation of mixing and then fertilizing in the use process of traditional organic fertilizer is not needed, the fertilization efficiency is effectively improved, the use of the slaked lime can be more adapted to the strong-acid land property of the existing Jinggang honey pomelo special planting area, the soil acidity is effectively improved, the soil fertility is improved, and the high quality and high yield of Jinggang honey pomelo are promoted.

This invention belongs to the field of acidifier technology, specifically relating to an acidifier that can improve the health of breeding ducks and the hatchability of hatching eggs, its preparation method, and its application. The acidifier includes acidifier A and acidifier B. Acidifier A is prepared by mixing and adjusting the volume of calcium formate, acetic acid, lactic acid, monk fruit extract, and an immune enhancer; acidifier B is prepared by mixing and adjusting the volume of calcium propionate, citric acid, malic acid, stevia extract, and an antioxidant. This invention enhances the immunity and antioxidant capacity of breeding ducks and improves eggshell quality by intermittently and alternately adding the two acidifiers to their drinking water during the egg-laying period. Furthermore, by spraying a proportionally diluted mixture of the two acidifiers during the later stages of hatching, it improves embryonic calcium absorption and duckling shell-pecking rate, reduces embryonic mortality, and significantly increases the hatchability of hatching eggs. This invention is suitable for large-scale breeding and hatching of breeding ducks.

The utility model discloses a bubble leading sheet for a storage battery liquid injection acid pot and the storage battery liquid injection acid pot. According to the bubble guiding piece, the protruding bubble guiding strip is arranged on at least one of the two side faces of the bubble guiding piece body in the thickness direction, the knife edge structure which is gradually thickened upwards from the bottom of the bubble guiding piece is arranged at the bottom of the bubble guiding strip, and the sawtooth structure used for puncturing bubbles is further arranged above the knife edge structure of the bubble guiding strip. Through the arrangement of the sawtooth structure, the air resistance of the acid injection port can be eliminated, the active puncture of bubbles and the directional flow guide of the acid liquor are realized, the acid liquor is ensured to be uniformly distributed to each battery cell during battery formation, and the consistency of the acid amount and the concentration is improved.

The invention relates to an acetic ester synthesis method based on a universal ionic liquid catalyst. Comprising the following steps that S1, acetic acid, an alcohol raw material and a composite catalyst are mixed, the use amount of the composite catalyst is 0.5%-2.5% of the total mass of reactants, and the molar ratio of the alcohol raw material to the acetic acid is 1: 1-1.2: 1; s2, carrying out an esterification reaction under stirring and heating, carrying out real-time coupling control on a catalyst ratio, an addition rate and a temperature in the reaction process, and maintaining the reaction temperature at 85-120 DEG C until the reaction conversion rate gt; 98%; and S3, after the reaction is finished, separating a reaction mixture, recovering and regenerating the catalyst, and refining to obtain a high-purity acetic ester product with the total impurity content not higher than 0.15%. According to the acetic ester synthesis process, the composite functionalized ionic liquid is used as the catalyst, and efficient, high-selectivity, low-corrosion and low-pollution acetic ester synthesis is realized.

The invention discloses a modified SAPO-11 molecular sieve and a preparation method thereof, a catalyst and a preparation method thereof, and a Fischer-Tropsch wax hydroisomerization method, and belongs to the technical field of chemical engineering. The method comprises the following steps: mixing an aluminum source, a phosphorus source, a silicon source, a template agent, alcohols, water and a transition metal source to obtain initial gel; the transition metal source is selected from at least one of an iron source, a cobalt source, a nickel source, a copper source and a zinc source; crystallizing the gel to obtain a product; the first-stage crystallization temperature is 60-150 DEG C, and the time is 10-18 hours; the second-stage crystallization temperature is 130-200 DEG C, and the time is 10-18 hours; and roasting the product to obtain the modified molecular sieve. The specific transition metal is introduced into the SAPO-11, so that the acidity of the SAPO-11 is improved, and the isomerization activity is promoted; by adopting a variable-temperature crystallization process, the grain size of the crystal is reduced; the catalyst can significantly improve the isomerization product yield and selectivity of heavy wax, and shows excellent isomerization performance.

This invention belongs to the field of chemical synthesis technology, specifically relating to a method for preparing 2-methyl-1H-phenylenehydride. The method includes the following steps: using acetic acid and 1,8-diaminonaphthalene in a molar ratio of 2.5~5.5:1 as reactants, and water as the reaction medium, at 100℃~185℃, one amino group of 1,8-diaminonaphthalene undergoes a condensation reaction with the carboxyl group of acetic acid, removing one water molecule to obtain a product intermediate containing an amide bond. The other amino group on the intermediate undergoes an intramolecular cyclization reaction with the carbonyl group in the amide bond, removing one water molecule to obtain a crude product. The crude product is then purified to obtain the 2-methyl-1H-phenylenehydride. The 2-methyl-1H-phenylenehydride prepared using the method of this invention can achieve a purity of up to 98%.