52results about How to "Control acidity" patented technology

The invention discloses electrolyte solution of a manganic acid lithium battery. The electrolyte solution comprises lithium salt, non-aqueous organic solvent, film-forming additive and stabilizing additive, namely seven-methyl two-silazane. Because the stabilizing additive, seven-methyl two-silazane is added into the electrolyte solution, the acidity of the electrolyte solution can be controlled. The cycle life and the high temperature storage performance of a lithium ion battery can be improved by using the electrolyte solution to prepare a battery.

The invention discloses an SAPO molecular sieve, which has single crystals in sheet structure. The SAPO molecular sieve has moderate pore size, and can be used as a catalyst with long service life for olefin preparation from methanol. The invention also discloses a preparation method of the SAPO molecular sieve. The method us as below: activating a raw material of layered aluminosilicate, mixing the raw material with an phosphorus source and water, and homogenizing to obtain a wet masterbatch; drying and grinding the wet masterbatch to obtain a dry powder; and finally distilling the dry powder for crystallization, so as to obtain a raw powder for sheet SAPO molecular sieve. The method requires addition of a template agent, realizes low cost synthesis of SAPO molecular sieve and high additional value utilization of natural layered aluminosilicate, accelerates the rate of diffusion of various substances in the channels of the molecular sieve, increases the diffusion efficiency, and the advanategs of low equipment investment, simple operation and environment-friendliness.

The invention relates to a production method of a dye intermediate, i.e., 6-nitro-1,2,4-sulfonic acid. The method is characterized in that: the 6-nitro-1,2,4-sulfonic acid is obtained by taking ethyl naphthol as a major raw material and performing procedures including nitrosification, neutralizing, sulfonation reduction displacement, diazotization, acidification, nitration and the like. Due to the adoption of the method, the problems of the production of a large amount of high-COD (Chemical Oxygen Demand) waste water and waste gas and high production cost existing in a production process can be solved. In the method, ethyl naphthol is dissolved by raising the temperature naturally, so that a liquid caustic soda dissolving method is replaced, the using amount of liquid caustic soda and sulfuric acid is reduced, production cost is reduced, and the production of waste water is reduced; a diazonium resisting method is adopted for diazonium, so that the production of toxic waste gas is reduced, the yield of diazonium is increased, and production cost is reduced; the diazonium resisting method is adopted, and solid sodium nitrite is added, so that the production of waste water can be reduced; and in diazonium, copper sulfate is taken as a catalyst, so that reaction speed is increased, the occurrence of side reactions is reduced, and yield is increased.

The invention relates to a method for measuring the content of Al, Ti and Ca in low-carbon silicon iron, which comprises the following steps: dissolving a sample through a nitric acid and a hydrofluoric acid, after fuming the sample through a perchloric acid, adding a proper amount of hydrochloric acid, and heating to dissolve a salt; diluting to a certain volume with water; introducing atomization solution into an inductively coupled plasma atomic emission spectrometer; measuring the intensity of a spectral line to be tested; and calculating the concentration of a corresponding element of the substance to be tested according to the intensity of the spectral line which is measured by the standard substance at known concentration. The method has the advantages of capacity of quickly and accurately analyzing the content of Al, Ti and Ca in the low-carbon silicon iron and no pollution.

The invention discloses a method for extracting highly purified rhubarb dissociated anthraquinone by a hypercritical CO2 extraction method, including leaching the material with organic solvent to get leaching liquid, hydrolyzing the combined anthraquinone, balancing out the superfluous acid with inorganic alkali or acid after hydrolytic reaction, getting hydrolytic leaching liquid; injecting the hydrolytic leaching liquid into the extraction vessel for a hypercritical CO2 extraction, entering to the separation vessel after the extraction; recycling separated CO2, collecting discharging rhubarb dissociated anthraquinone and organic solvent, steaming out the organic solvent decompressly, obtaining the rhubarb dissociated anthraquinone powder. The invention adopts the liquid feed to effectively control the material liquid acidity in the extraction vessel and prevent the equipment corrosion and potential safety problems; meanwhile, it does not need install and detach the extraction vessel by entrainer pump liquid feed so that the extraction is processed continuously and greatly saves the extraction time and improve the output in unit time.

The invention provides an external surface modification method of a microporous molecular sieve, which comprises the following steps: mixing silicasol and a microporous molecular sieve, carrying out liquid deposition to initiate physical adsorption between the molecular sieve and the silicasol, filtering, drying and roasting to prepare the external-surface-modified microporous molecular sieve. In the invention, colloidal particles of the silicasol are larger than pores of the selected molecular sieve, thereby preventing the colloidal particles from entering the inside of the pores; and when the silicasol particles are adsorbed onto the external surface of the molecular sieve, drying and roasting are utilized to remove water in the colloidal particles, so that the colloidal particles are firmly attached onto the external surface of the molecular sieve. The XPS (X-ray photoelectron spectroscopy) measurement indicates that the modified molecular sieve has obviously higher surface phase silica-alumina ratio than the un-modified molecular sieve. The improved Hammett tracer method measurement on the acid quantity of the external surface of the molecular sieve before and after modification proves that the modified molecular sieve has lower acid quantity on the external surface.

4-diaminobezene sulfonic acid and salt thereof The invention relates to a production method of a dye intermediate 2,4-diaminobezene sulfonic acid. The method is characterized by using m-phenylenediamine as a main raw material and comprising operations of sulfonation, hydrolysis and refining to prepare the 2,4-diaminobezene sulfonic acid. The invention also provides a preparation method of 2,4-diaminobezene sulfonic acid ammonium salt or sodium salt by using the 2,4-diaminobezene sulfonic acid prepared by the above method, so as to solve problems of low reaction efficiency, high sulfonation temperature, secondary pollution caused by usage of organic solvent and acid-containing processing in the production process. The method of the invention employs addition of fusing m-phenylenediamine to increase solubility of the m-phenylenediamine in the sulfuric acid and reduce generation of side reaction; m-phenylenediamine and sulfuric acid are added respectively to control the acidity of the reaction system at a required acidity, control generation of side reaction and increase product quality and product yield; grading control of acidity and temperature maintains stable proceeding of reaction; and addition of hydrolysis increases yield of the product, improves product quality and reduces production cost.

The invention discloses a preparation method for a propane dehydrogenation catalyst. Without hydrogen reduction, a reaction feed gas is directly introduced and the Pt reduction degree is controlled to improve the stability and sulfur tolerance of the catalyst. The method omits of the drying roasting process, can effectively remove chlorine from the catalyst without hydrothermal treatment, and can significantly improve the activity, selectivity, stability and sulfur tolerance of the catalyst without hydrogen reduction. The preparation method is simple. The catalyst prepared by the method can avoid excessive alkali loss, improve the dispersity of Pt based catalyst active metals, form more secondary active phases, and ultimately improve the selectivity of the target product propylene and the catalyst activity, stability and sulfur tolerance.

The invention belongs to the technical field of liquid making and particularly relates to a method for increasing the yield of strong aromatic Huisha baijiu. The method for increasing the yield of the strong aromatic Huisha baijiu is provided to achieve the technical purpose. The method comprises the steps of conducting drying in a spreading mode and adding yeast on the vinasse obtained after distilling for baijiu and adding yeast, adding the yeast in an upper layer grain groove before putting into a cellar, putting the yeast after being evenly mixed for fermentation, distilling after finishing the fermentation, so that the Huisha baijiu is obtained. According to the method for increasing yield of the strong aromatic Huisha baijiu, the Huisha baijiu yield can be greatly increased on the premise of guaranteeing the high baijiu quality.

The invention provides a biomass compound fuel which consists of straw, straw carbon, wood chips, rice straw, a combustion improver, a potassium removal agent, high-carbon alcohol, caustic soda and grease. The fuel is transformed for a coal-fired boiler, to reduce the equipment cost and fuel cost of an enterprise; the fuel gas a relatively high clean energy grade; by adopting the straw, straw carbon, wood chips and rice straw as main materials, the cost is low, and little environmental pollution is caused; the caustic soda can control the biomass acidity and reduce corrosion and coking of theequipment caused by the fuel; the fuel is made into an ellipse with an overall dimension of 3.5*2.5*1.58cm, and such size is applicable to the fuels of various fixed-grate and chain-grate boilers, wherein the standard lower heat value is higher than 5000kcal, the sulfur content is less than 0.3%, the content of volatile matters is 35%, the ash content is less than 10%, and the content of the fixedcarbon is greater than 50%.

The invention provides a method for reducing nitrate radicals in an acid solution. According to the method, an acid solution containing the nitrate radicals is subjected to pre-reduction, the nitrateradicals are reduced to be in a nitrite radical state, then catalytic reduction is carried out, the nitrite radicals are directly reduced to be nitrogen, nitrate radical ions in the acid solution areremoved, and a generated gas is low in nitrogen oxide content, free of pollution to air and harmless to a human body; meanwhile, the method has the advantages of simple operation conditions and process, the invention further provides a device for reducing the nitrate radicals in the acid solution, and the device is simple and easy to operate and has great industrial application value.

The invention provides a rapid gradient fermentation process for normal-temperature ready-to-eat leisure fermented meat and an application of the rapid gradient fermentation process. The normal-temperature ready-to-eat leisure fermented meat comprises the following strains in percentage by mass of 20-25% of lactobacillus sake, 20-25% of pediococcus acidilactici, 20-25% of staphylococcus xylosus, 15-25% of staphylococcus carnosus and 10-20% of staphylococcus vitulinus. Compared with the prior art, a design compound bacteria is used for fermentation, a three-stage rapid gradient fermentation production process is designed, the processing time of products is short, the acidity of the products better conforms to the mouth feel of Chinese people, the products are more moist, the mouth feel requirement of consumers is met, and in addition, the shelf life of the products is long.

The invention relates to a method for preparing diesel by hydrogenating anthracene oil. The method comprises the following steps: reacting anthracene oil in hydrogenation reaction region containing a first catalyst; allowing the product oil obtained in the hydrogenation reaction region to enter a hydrocracking reaction region containing a second catalyst to react to prepare a diesel component finished product. The method has the advantages that hydrofining catalysts can realize hydrodesulfurization, hydrodenitrification and hydrodeoxygenation of coal tar and can improve activity, so that aromatic hydrocarbon is saturated and subjected to ring opening; an aid potassium is added into the catalysts, so easy-to-coke substances of the coal tar can be inhibited from coking and blocking reactors and the stability of the catalysts is improved; the acidity of a carrier is effectively controlled by adjusting the adding ratio of titanium dioxide and cerium dioxide of the carrier, so that hydrocracking activity and selectivity are improved; the titanium dioxide has strong adsorption capability on sulfur, so desulfuration is promoted; the cerium dioxide has high melting point, so the stability of the carrier is improved and the service life of the catalysts is prolonged.

Two processes of preparing HClO disinfectant. NO.1 a. Electrolysis NaCl solution with no diaphragm, made molNaCl:mol NaClO>1:1; b. Electrolysis further electrolytic solution from a besides positive pole at diaphragm cell. HCl produced neutralizes NaClO to form HCl. NO.2 Electrolysis NaCl solution with no diaphragm to be NaClO, HClO and HCl. Mix the produced solution from a and b to form HClO.

The invention relates to a preparation method for disturbing yoghurt. The preparation method comprises the following successive steps: acceptance inspection of raw milk; acceptance inspection of accessory materials; batching; homogenization; sterilization; primary cooling; inoculation; fermentation; secondary batching; stirring; secondary cooling; filling; sealing; coding; binning; and refrigeration; wherein temperature for primary cooling and inoculation is 27 to 33 DEC C, a strain accounting for 0.3 to 0.4% (wt%) of a mixed material is inoculated, fermentation is carried out in a fermentation cylinder at a temperature of 30 +/- 3 DEG C for 16 to 20 h and is terminated when acidity reaches 65 to 70 DEG C T, and fermentation broth is cooled to a temperature of 20 +/- 3 DEG C in secondary cooling. Compared with inoculation temperature of 42 to 45 DEG C in a traditional process, inoculation temperature the invention is controlled to be 27 to 33 DEG C, so the fermentation speed of the yoghourt decreases, acidity slowly increases, an acidity generation speed is slowed down, and acidity of the yoghourt can be better controlled in actual operation; with the preparation method, the quality of the produced yoghourt is improved and stable, fermentation can be reasonably carried out at night, on-duty time of a worker is shortened, and labor efficiency is improved.

The invention provides a making method of dry loquat wine. The method comprises the following steps: Saccaromycescerevisiae and Lactobacillus buchneri are used for primary fermentation and secondary fermentation of washed loquat whose stalks and pits are removed, the primary fermentation is performed at the temperature of 18-21 DEG C for 15-20 days, and the secondary fermentation is performed at the temperature of 22-24 DEG C for 8-10 days; then Candida utilis is used for tertiary fermentation which is performed at the temperature of 25 DEG C for 15-20 days; and aging is performed for at least 120 days after fermentation is finished. The invention further provides the dry loquat wine made with the method. The dry loquat wine and the making method thereof have the advantages as follows: threat to a human body due to addition of sulfur dioxide is avoided, browning can be effectively prevented, the acidity can be effectively controlled, the dry loquat wine with excellent taste can be obtained without additional operation, and the obtained loquat wine tastes good and has typical flavor of the loquat wine.