11results about How to "Reduce acid content" patented technology

This invention belongs to the field of alcoholic beverage processing technology, specifically relating to a high-purity ginkgo wine and its preparation method. The preparation method comprises the following steps: ginkgo slurry undergoes preliminary enzymatic hydrolysis with neutral protease and amylase, followed by secondary enzymatic hydrolysis with pectinase and sodium bisulfite; brewing yeast fermentation broth is added for pre-fermentation; glutamine transaminase, *Saccharomyces cerevisiae* fermentation broth, and *Candida valerate* fermentation broth are added for post-fermentation; and finally, distillation and filtration are performed to obtain the ginkgo wine. This invention achieves complete decomposition and fermentation of ginkgo kernels through a two-step enzymatic hydrolysis and two-step fermentation process. The preparation method has advantages such as simple process and low cost, which is beneficial for industrial production; the prepared ginkgo wine has advantages such as clarity, strong aroma, high alcohol content, and low acidity.

The invention relates to the technical field of organic synthesis, in particular to a reactive distillation device and method for continuously producing low-carbon unsaturated acid-high-carbon alcohol ester. According to the device provided by the invention, the reactive distillation tower, the primary condenser and the reboiler are connected through the pipeline, and moisture generated in the reactive distillation region is removed in time by adopting a reactive distillation mode, so that the high-carbon alcohol conversion rate is further improved; furthermore, the tower kettle ester product is externally circulated and returned into the tower, so that the product selectivity is improved; meanwhile, condensate is refluxed at the tower top, so that the yield of ester products is improved.

The present application belongs to the field of dimethyldichlorosilane concentrated acid hydrolysis reaction in the organic silicon industry, and particularly relates to a dimethyldichlorosilane concentrated acid two-stage hydrolysis reaction process. The process comprises the following specific steps: dimethyldichlorosilane is subjected to a first-stage hydrolysis reaction with recycled saturated hydrochloric acid and water, and an additive is added; purification and drying are performed, and the purified siloxane is subjected to a second-stage reaction in a second-stage reactor; after the second-stage reaction is completed, the mixture is subjected to oil-water separation, and the hydrolyzate is subjected to a washing section to obtain a final product. The dimethyldichlorosilane provided by the present application is subjected to two-stage hydrolysis reaction, the content of chlorine-terminated groups in the generated hydrolyzate is greatly reduced, the acid content is low, and the quality of the hydrolysis product is high. The new process provided by the present application adopts a two-stage reaction system, solves the problems of high chlorine-terminated group content, hydrogen chloride gas containing dimethyl and hydrolyzate, and obtains high-quality hydrolyzate, and the reaction system maintains a slight positive pressure, which does not inhibit the dimethyl hydrolysis reaction.

The invention relates to sweet-scented osmanthus black tea and a preparation method thereof, and belongs to the technical field of tea beverages. The preparation method specifically comprises the following steps: S1, performing primary homogenization, separation, concentration and secondary homogenization on black tea to obtain a black tea solution; s2, adding a sucrose solution, a sweet-scented osmanthus extracting solution and a lactic acid bacteria seed solution into the black tea solution, and performing fermentation to obtain a compound fermentation solution; and S3, adding a yeast seed solution into the compound fermentation solution, and performing fermentation and sterilization to obtain the sweet-scented osmanthus black tea. The flavor, the biological activity and the nutritional value of the sweet osmanthus black tea can be remarkably improved through high-pressure homogenization, ultrahigh-pressure homogenization, saccharomycetes and lactic acid bacteria step-by-step fermentation.

The invention belongs to the technical field of cosmetics, and particularly relates to a mandelic acid-containing ternary supramolecular eutectic composition as well as a preparation method and application thereof. The mandelic acid-containing ternary supramolecular eutectic composition is prepared from mandelic acid, succinic acid and dimethyl sulfone in a mass ratio of (1-4): 1: 1. The preparation method comprises the following steps: respectively taking mandelic acid, succinic acid and dimethyl sulfone, carrying out vacuum drying to remove moisture and impurities so as to obtain pretreated raw materials, adding the pretreated raw materials into a ball mill, adding absolute ethyl alcohol accounting for 10-20% of the total mass of the raw materials as a grinding aid solvent, carrying out grinding so as to obtain a mixture, and finally, carrying out drying to remove an ethanol solvent so as to obtain the mandelic acid-succinic acid composite grinding aid. The mandelic acid-containing ternary supramolecular eutectic composition is obtained. According to the ternary supramolecular eutectic prepared by adopting a specific raw material ratio and a specific process, a stable crystal structure is formed through a hydrogen bond network, the stability, the exfoliating effect and the acne removing effect of the ternary supramolecular eutectic in cosmetic application can be remarkably improved, and meanwhile, the irritation to inflammatory skin is lower.

The present application relates to the technical field of wine brewing, in particular to a method for brewing Thompson Seedless white grape wine by carbon dioxide impregnation fermentation, comprising the following steps: adopting a process scheme combining carbon dioxide whole fruit impregnation and sequential inoculation of multiple yeasts, placing whole Thompson Seedless white grape berries in a closed carbon dioxide environment for impregnation at 28-32 DEG C for 8-12 days to promote the dissolution and conversion of skin aroma precursors; after crushing, juice extraction and clarification, first inoculating non-wine yeast such as Cryptococcus or Saccharomycodes deemii for fermentation for 48 hours, and then inoculating wine yeast QA23 or EC1118 to complete main fermentation and segmented temperature control. The present application significantly increases the content of ester and terpene aroma substances, enhances fruitiness and floral characteristics, effectively improves the complexity and level of aroma, guarantees fermentation stability, and provides a new technical approach for the quality upgrading of Thompson Seedless white grape wine.

The invention provides fermentation type green plum wine and a making method thereof, and belongs to the technical field of wine brewing.The making method comprises the following steps that S1, green plums are selected, cleaned and disinfected, evenly mixed with auxiliary materials and subjected to standing and pickling, and a mixture is obtained; s2, activated fruit wine yeast and water are added into the mixture for fermentation, supernate is taken after fermentation is completed, residues are filtered and then combined with the supernate, and fermented wine is obtained; s3, mixing a composite deacidification agent with the fermented wine for primary deacidification, then filtering, mixing the obtained fermented wine with anion exchange resin for adsorption deacidification, and filtering after deacidification to obtain raw wine of the green plum wine; s4, mixing the raw wine of the green plum wine with rock candy and honey, and sequentially performing rough filtration, fine filtration and packaging to obtain a finished product of the green plum wine. According to the technical scheme provided by the invention, the cost is low, and the purposes of low acid content and appropriate fruity flavor in the green plum wine are achieved.

The utility model relates to the technical field of mixer discloses an acid detergent mixer, including mixing jar, upper cover and gas purification box, the upper cover is fixedly installed through the lock catch in the mixing jar top, the upper cover top integral connection has the feed pipe, detection tube and the gas pipe, one side of the feed pipe is equipped with the drive motor, the drive motor fixed connection is in the upper cover top center place, the detection tube top is fixedly connected with the gas detector, the utility model discloses the gas detector of detection tube top real -time monitoring composition and concentration, after reaching the standard, through the gas pipe, gas pipe, under the control of solenoid valve, directional delivery is handled to the gas purification box, after harmful gas through the gas pipe and enters the gas purification box, first accept the spray treatment of annular shower, and the annular shower introduces neutralization solution through the water inlet pipe, and the spray head sprays to the receiving groove, and the acid -base neutralization reaction is used to remove the acidic component in harmful gas primarily.

The invention relates to the field of chemical engineering and material engineering, and provides a method for preparing high-purity magnesium oxide by taking ferronickel slag as a raw material, which comprises the following steps: (1) leaching: mixing ferronickel slag and sulfuric acid, leaching under normal-pressure heating and stirring conditions, and taking leachate after leaching; (2) primary crystallization: adding a seed crystal into the leachate, separating out coarse magnesium sulfate through primary crystallization, and carrying out solid-liquid separation to obtain coarse magnesium sulfate; (3) impurity removal: dissolving crude magnesium sulfate in water to obtain a magnesium sulfate crude solution, adding a neutralizing agent into the magnesium sulfate crude solution for neutralizing, hydrolyzing and removing impurities, and filtering to obtain a magnesium sulfate fine solution; (4) secondary crystallization: adding a seed crystal into the magnesium sulfate fine liquid for secondary crystallization to separate out high-purity magnesium sulfate; and (5) calcining: calcining the high-purity magnesium sulfate to obtain the high-purity magnesium oxide. The technology has the advantages of low equipment requirement, low production cost, high magnesium recovery rate, high magnesium oxide purity and high economic added value, and is convenient for industrial application.

The invention provides a production method for recovering glacial acetic acid through negative pressure distillation, and belongs to the technical field of glacial acetic acid recovery. The method comprises the following steps of: preheating dilute acetic acid obtained by a reaction in a previous working section in a preheater, feeding the preheated dilute acetic acid into a concentration tower, injecting butyl acetate into the concentration tower, concentrating, feeding the concentrated acetic acid into a distillation tower, distilling, feeding a distilled gas phase into a condenser through heat exchange, and condensing to obtain liquid acetic acid, and transferring into a receiving tank to obtain crude acetic acid. By changing the positive pressure of the distillation system into the negative pressure for production, online switching and distillation online cleaning are realized, the distillation effect of the distillation tower is improved, the steam consumption is reduced, the resistance of the concentration system is reduced, the acid content in wastewater is reduced, the wastewater amount of system cleaning is reduced, the operation period of the concentration tower is prolonged, and the production cost is reduced. Therefore, the effects of saving energy, reducing emission and reducing consumption are achieved.

The invention discloses a neutralization treatment device for waste gas from acetic anhydride production, which belongs to the technical field of waste gas treatment and comprises a plurality of reaction tanks, a containing tank, a reflux component and a gas-liquid mixing component. The plurality of reaction tanks are connected to each other through a gas transmission pipe, and a spray pipe for spraying alkali solution is arranged inside the reaction tank, which is used to contact with waste gas and perform graded neutralization treatment on the waste gas. The plurality of containing tanks correspond to the plurality of reaction tanks one by one and are connected through a connecting pipe. The plurality of containing tanks are respectively used to contain alkali solutions of different concentrations, and the reflux component is used to re-transport the alkali solution in the containing tank to the spray pipe. The invention can react more fully with acidic components in the waste gas by passing the waste gas into alkali solutions of different concentrations in sequence, thereby improving the neutralization effect and reducing the content of acidic substances in the waste gas, and recycling the alkali solution after the neutralization reaction to save resources and reduce costs.