740 results about "Acetate salt" patented technology

Through screening of a Zymomonas mutant library the himA gene was found to be involved in the inhibitory effect of acetate on Zymomonas performance. Xylose-utilizing Zymomonas strains further engineered to reduce activity of the himA gene were found to have increased ethanol production in comparison to a parental strain, when cultured in mixed-sugars medium comprising xylose, and, in particular, in the presence of acetate.

The invention discloses a chlorine-free powdery cement grinding aid suitable for fly ash, which comprises the following components in parts by weight: 0-5 parts of alkanolamine, 2-5 parts of polylol,15-75 parts of sulfate, 5-20 parts of acetate, 0-5 parts of lignosulphonate, 2-6 parts of carbohydrate organic matter, 5-25 parts of miltonite, 0-25 parts of carbamide and 5-50 parts of inorganic carrier material. The invention also discloses a preparation method of the chlorine-free powdery cement grinding aid suitable for the fly ash. A compound grinding aid can lower the cement cost and uses the fly ash for replacing partial clinker to save the clinker dosage by 10-15 percent on the premise of keeping the cement strength unchanged, and uses extra 10-15 parts of fly ash without increasing the required water amount of cement standard consistency; the cost of the cement per ton is lowered by more than 10 Yuan.

The invention relates to the fields of industrial microbiology and alcohol production. More specifically, the invention relates to improved production of butanol isomers by recombinant microorganisms containing an engineered butanol pathway and disrupted activity of the genes in pathways for the production of by-products during the fermentation when the microorganisms are grown in a fermentation medium containing acetate. In embodiments, recombinant microorganisms have an increased growth rate in a fermentation medium containing acetate as a C2 supplement.

A high-activity catalyst for both esterification and polycondensation contains anti-hydrolytic high-activity glycol titanium, the acetate, carbonate or oxalate of (1-4)-valence metal ions, and at least one of alkoxyl compound, organic acid and phosphorous compound. Its advantages are high activity, short reaction period, and no environmental pollution. Its resultant polyester has high photochemical performance and whiteness.

The invention relates to a formula and a corresponding preparation technology of a normal temperature formaldehyde removal catalysis material, and belongs to the technical fields of normal temperature adsorption catalysis and air pollution treatment. The catalysis material is prepared by adopting a one-step co-precipitation process or a step-by-step dipping process to load active components with granular, cylindrical, spherical or honeycomb high-specific surface area shell activated carbon as a carrier, one or more non-noble metal salts as main active components, such as nitrate, sulfate or chloride of manganese, iron, cobalt, nickel, copper, zinc, lanthanum or cerium, one or more alkali metal/ alkaline earth metal salts as an inorganic additive, such as oxalate, nitrate, sulfate, acetate, carbonate and bicarbonate of sodium, potassium, magnesium, calcium, and ethylenediamine tetracetic acid/ethylenediamine tetraacetic acid salt, basic amino acid, polyamide monomer and polyurethane monomer as a nitrogen-containing organic additive. The normal temperature formaldehyde removal catalysis material has the characteristics of rapid capture, high efficiency catalytic oxidation and long working cycle, and can meet requirements of long-time effective removal of formaldehyde in indoor real environment.

The invention discloses a process for reversely recycling and preparing lithium nickel manganese oxide by taking waste lithium batteries as raw materials. The process is characterized by comprising the following steps of: (1) preprocessing a positive battery plate of a waste lithium battery to obtain anode power; (2) dissolving the anode power in inorganic acid, and eliminating impurities to obtain mixed acid liquor containing nickel and manganese; (3) adding a nickel source or a manganese source into the mixed solution; (4) adding an acetate complexing agent, and regulating the ratio of the acetate concentration to the total metal ion concentration; (5) putting the mixed solution into an electrolytic bath to be electrolyzed, and depositing nickel manganese oxide on a titanium plate; (6) stopping the conduction of a direct current, taking the titanium plate out, separating the nickel manganese oxide on the titanium plate, and drying the nickel manganese oxide to obtain nickel manganese oxide powder; (7) and uniformly mixing the nickel manganese oxide powder and a lithium source, and then calcining the mixture to obtain lithium nickel manganese oxide. According to the process, a regenerated product having the performance the same with the performance of the original product can be obtained by the waste battery through a reverse recycling process, so that the resource utilization can be realized.

The invention relates to a vinyl acetate catalyst, a preparation method thereof and a method for synthesizing vinyl acetate in order to mainly solve the problem of low activity and selectivity of a catalyst in the prior art. The problem is better solved through the technical scheme that the vinyl acetate catalyst comprises a carrier, active components and a catalyst promoter, wherein the active components include metal Pd and metal Au; the catalyst promoter is alkali metal acetate; the carrier is silicon dioxide provided with a coating on the surface; the coating is prepared from modified metal elements and a silicon dioxide adhesive for adhering the modified metal elements on the surface of the carrier; 0.01-1.00g/L of the modified metal elements are contained; the modified metal elements are at least one selected from IIA metal elements and IIIB metal elements. The vinyl acetate catalyst can be used for industrial production of vinyl acetate.

A process for obtaining inorganic salt and acetate salt from cellulosic biomass is disclosed. The cellulosic biomass is pretreated by adding one or more than one acid or base to produce a pretreated cellulosic biomass comprising acetic acid or acetate salt. One or more than one base or acid is then added to the pretreated cellulosic biomass to adjust the pretreated cellulosic biomass to a pH of about 4.0 to about 6.0 to produce a neutralized cellulosic biomass comprising inorganic salt and acetate salt. The neutralized biomass is then hydrolyzed by cellulase enzymes to produce a sugar stream. Streams arising from the processing of the cellulosic biomass to sugar are subjected to ion exclusion chromatography performed at pH 5.0 to about 10.0 to produce a stream comprising an inorganic salt and an acetate salt.

The invention discloses a method for separating a methyl acetate-methanol mixture by ionic liquid intermittent extractive rectification, which is realized in a way that: a rectifier of an extractive rectification tower is adopted, an ionic liquid 1-ethyl-3-methyl imidazolyl acetate is used as an extractant, and the operation is carried out intermittently, so the top of the extractive rectification tower sequentially produces a methyl acetate product of which the mass content is up to 98-99.9%, a methyl acetate-methanol transitional fraction and methanol of which the mass content is 97-99%; and finally, the extractant of which the mass percent is 99% is left in the heating kettle. The invention has the following advantages: the extractant is adopted to enhance the relative volatility of the methyl acetate-methanol system, the purity of the separated methyl acetate product is high, and the ionic liquid used as the extractant is easy to recover and does not pollute the environment; and only one single tower needs to be operated, so that operation is flexible and the equipment investment is low.

An etchant includes about 0.1 percent by weight to about 30 percent by weight of ammonium persulfate (NH₄)₂S₂O₈, about 0.1 percent by weight to about 10 percent by weight of an inorganic acid, about 0.1 percent by weight to about 10 percent by weight of an acetate salt, about 0.01 percent by weight to about 5 percent by weight of a fluorine-containing compound, about 0.01 percent by weight to about 5 percent by weight of a sulfonic acid compound, about 0.01 percent by weight to about 2 percent by weight of an azole compound, and a remainder of water. Accordingly, the etchant may have high stability to maintain etching ability. Thus, manufacturing margins may be improved so that manufacturing costs may be reduced.

The invention belongs to the technical field of preparation of a regenerated cellulose material and discloses a preparation method of the regenerated cellulose material. A employed solvent is a carboxylic acid type ionic liquid or is a co-solvent which is composed of the carboxylic acid type ionic liquid and an active-proton-free polar organic solvent, wherein the carboxylic acid type ionic liquid is preferably selected from 1-ethyl-3-methylimidazole acetate, 1-propyl-3-methylimidazole acetate or 1-butyl-3- methylimidazole acetate; an auxiliary solvent is selected from one or more of DMF, DMAc, DMI, DMSO, pyrrodine, acetone, dichloromethane and dichloroethane; and a solidifying agent is preferably selected from alcohol organic solvents. The carboxylic acid type ionic liquid is most preferably selected from the 1-ethyl-3-methylimidazole acetate and the 1-butyl-3-methylimidazole acetate; the auxiliary solvent is most preferably DMF; and the solidifying agent is preferably ethanol; wherein a mass ration of the carboxylic acid type ionic liquid to the auxiliary solvent is 5:5. By means of the preparation method, mechanical performances of a regenerated cellulose product can be significantly improved and environmental pollution can be reduced.

The invention herein provides for an oral pharmaceutical composition adapted for use in capsular dosage forms comprising acetaminophen and a lactate salt alone or in combination with an acetate salt. Compositions of the invention exhibit improved solubility characteristics of the active ingredient per given fill volume, thereby permitting the use of smaller capsule sizes to deliver a given effective dose of the active ingredient. Compositions of the invention also exhibit improved clarity per concentration of active ingredient. The invention also provides for a capsular dosage form containing the composition.

This invention relates to a preparation method for synthesizing methyl alcohol catalyst-acid-alkali alternate deposition method including: 1, solving the nitrate or acetate of Cu, Zn and Al in water to get a mixed salt solution, 2, preparing alkali solution, 3, alternately adding the alkali solution and the mixed salt solution in a deposition tank while mixing to alter the PH value of the mother liquor with the PH value of 1.0-12.0, 4, aging the deposition mother liquor under mixing then to wash, filter, dry the cakes, bake to press or squeeze them to molding, in which, one nitrate or acetate of Zr, Mg, Mn, Cr, La or Ce can be added into the mixed solution in step 1.

The invention discloses an iron-manganese compound oxide catalyst for selectively catalyzing and reducing nitric oxides in flue gas at a low temperature and a preparation method thereof and application thereof. The catalyst comprises active components such as iron element, manganese element, auxiliary agent element and the like. The method for preparing the catalyst comprises the following steps: 1, the iron salt and the manganese salt are mixed, and added with nitrate or acetate of the auxiliary agent element to obtain a mixed metal salt; 2, a solution of citric acid is added in the mixed metal salt and evenly mixed by stirring; 3, at the constant temperature of between 40 and 160 DEG C, the mixed solution is dried to give a solid; 4, the solid is calcined in the air for 1 to 8 hours, the calcination temperature is between 200 and 900 DEG C, and a mixed oxide is obtained; and 5, the mixed oxide is ground, tabletted and screened to obtain the finished product of the catalyst. The catalyst can selectively catalyze and reduce nitric oxides in the flue gas at a low temperature under the aerobic condition, so that the catalyst has the characteristics of high activity, high selectivity and high stability.

The invention relates to a preparation method of a liquid titanium catalyst for polyester and copolyester, which comprises the following steps of: (A) reacting a titanium compound, tetraethoxysilane and hydroxy carboxylic acid in a solvent at 0-100 DEG C for 0.1-24 hours, wherein the titanium compound is Ti(OR)4, and R is selected from alkyls of 1 to 10 carbon atoms; and (B) adding a phosphorous compound and acetate which is selected from metal elements of Na, Mg, Al, Zn and La into a reaction product in the step (A), reacting at 50-200 DEG C for 0.1-48 hours and removing micro-molecules to obtain the liquid titanium catalyst. By introducing a silicon element and other metal elements into the titanium catalyst and optimizing the preparation process condition of the catalyst, the catalyticactivity of the catalyst is regulated; the prepared catalyst can be mutual soluble with glycol and can be stably stored; and the polyester and copolyester prepared by using the catalyst have good hueand narrow molecular weight distribution.

The invention discloses a preparation method of a graphene and fullerene composite nano material. The method comprises the steps that sulfur-containing resin serves as a solid phase carbon source and sulfur source, transition metal acetate serves as a catalyst precursor, the sulfur-containing resin is close to the air inlet end of a heating furnace, transition metal acetate is close to the air outlet end of the heating furnace, heat treatment is conducted under the protection of inert gas, heat-treated products are collected, acid treatment, washing, filtering and drying are conducted, and the graphene and fullerene composite nano material is obtained, wherein the heat treatment temperature ranges from 600 DEG C to 900 DEG C, the heat treatment time ranges from 10 min to 60 min, and the temperature rising speed ranges from 5 DEG C/min to 20 DEG C/min. The method is a chemical-vapor deposition technology on the basis that the sulfur-containing resin serves as the solid phase carbon source and sulfur source, and transition metal acetate serves as the catalyst, large-scale one-step preparation of the graphene and fullerene composite nano material is achieved, and the problems that in the prior art, the steps are complex, the equipment is expensive, operation is tedious, and batch production is difficult are solved.

The invention relates to an environment-friendly snow melting agent and a preparation method of the snow melting agent, and belongs to the field of the snow melting agents. The snow melting agent is prepared from acetates and chlorine salts with low corrosivity as the main raw materials by mixing acetates including potassium acetate, magnesium acetate and calcium acetate with calcium chloride and magnesium chloride in a certain proportion, as well as a small quantity of corrosion inhibitor. The common fault that a common inorganic snow melting agent is high in corrosivity is effectively overcome, the cost is reduced, and therefore the snow melting agent is suitable for promotion and application.

A dual catalyst system thermoplastic phenolic resin preparation method comprises the steps of proportioning, refluxing and reacting, and drying; the raw materials comprises phenol or m-cresol and aldehydes compound, water, organic acid or inorganic acid and bivalent acetate in a molar ratio of 1:0.5-0.9:0-3.0:0.001-0.040:0.001-0.020; wherein, acetate is used as first catalyst and organic acid or inorganic acid is used as second catalyst in reaction process. The invention adopts phenolic aldehyde addition-condensation reaction in dual catalyst system to prepare the thermoplastic phenolic resin; the method has the advantage of rapid polymerization rate, high yield and low content of free phenols; the thermoplastic phenolic resin can be applied for preparing the coated sand and the prepared coated sand has higher hot tensile strength and tensile strength at room temperature.

The invention belongs to the technical field of metal materials and in particular relates to a preparation method of a high-performance steel and iron material additive-vanadium nitride. According to the technical scheme, the method comprises the following steps: preparing vanadium nitride by adopting a liquid-phase solvothermal method, wherein a liquid phase adopts a water solution or an alcohol solvent; a vanadium source is selected from bivalent, trivalent or tetravalent chloride of vanadium, sulfate, nitrate and acetate; and a nitrogen source is selected from ammonia gas, urea, hydrazine, ammonium chloride, ammonium carbonate, ammonium acetate and ammonium sulfate. According to the method, carbon or hydrogen does not need to be adopted as a reducing agent in the preparation process, so that the discharge of greenhouse gas in the preparation process is avoided and the impurity carbon element in vanadium nitride is eliminated; the alloy synthesis temperature is lower than 400 DEG C; and the nitrogen content of vanadium nitride synthesized by adopting the method maximally and theoretically can be 21%.

The invention discloses a preparation method of a nano titanium rare-earth composite catalyst and application of the catalyst in synthesis of polyesters and copolyesters (especially degradable polyesters). The preparation method comprises the following steps: carrying out reaction on a nano support and a titanium compound in a solvent at 20-80 DEG C for 1-4 hours to obtain a titanium-dioxide-supported nanoparticle solution, wherein a hydrolytic agent is added in the reaction process; and adding chlorides, acetates or stearates of Nd, Dy, Sm, Ce, La or Y, and Na, Mg, Zn or Al, carrying out reaction at 50-150 DEG C for 2-8 hours, and removing the distillate, thereby obtaining the product. The novel nano titanium rare-earth composite catalyst is obtained in the nano support mode; and the preparation technique of the catalyst is optimized to obtain the nano rare-earth catalyst with stable catalytic performance and hydrolysis resistance. The polyesters prepared by using the catalyst have the advantages of favorable color phase, high molecular weight, narrow molecular weight distribution and stable performance, and can be widely used in industrial production of PBS, PBAT, PBSA, PBST, PBT and various other polyesters.

The invention relates to a preparation method of zinc oxide varistor ceramic composite powder. The method is improved based on the existing liquid-phase coating process, takes zinc oxide powder as a main material, and adopts a two-step method to dissolve metal oxide additives, wherein Sb2O3 is induced by taking citric acid as a complexing agent, and other metal oxides are induced in a nitrate or acetate form, thereby not only solving the problem that the single complex method has high viscosity to affect the coating effect, but also solving the problem that the Sb2O3 can not be induced when the nitrate form is adopted. In addition, the invention also induces non-metal oxide addictives in the nano coating process to obtain the zinc oxide varistor ceramic with the nano coating structure containing the non-metal oxide addictives. The method of the invention can be used for all addictive formulas of currently commercial ZnO varistors, the obtained composite power has more uniform particlesize and distribution of components, and the ceramic with the performance substantially better than the commercial ZnO varistors can be obtained by utilizing the ordinary ceramic sintering technology.