13 results about "Alkali metal" patented technology

The invention discloses a resin composition and its preparing process, wherein the resin composition comprises alkali metal salt (A) whose content is 0.1-20 umol/g converted into alkali metal, carboxylic acid and its salt whose content is 2 umol/g converted into carboxylic acid radicals, vinyl with 5-60 mol% of content and 80-90 mol% of saponification degree.

Provided is a process for producing a rope-shaped alkali metal battery, comprising: (a) providing a first electrode comprising a first conductive porous rod and a first mixture of a first electrode active material and a first electrolyte residing in the pores of the first porous rod; (b) wrapping or encasing a porous separator around the first electrode to form a separator-protected first electrode; (c) providing a second electrode comprising a second conductive porous rod and a second mixture of a second electrode active material and a second electrolyte residing in the pores of the second porous rod; (d) combining the separator-protected first electrode and second electrode to form a braid or a yarn having a twist or spiral electrode; and (e) wrapping or encasing a protective casing or sheath around the braid or yarn to form the rope battery.

The invention discloses a preparation method of an ultra-large-specification high-Mg aluminum alloy round ingot. The preparation method comprises the following steps of burdening; smelting; preservingheat; carrying out primary refining, and controlling of argon flow; carrying out online degassing refining, and controlling of the rotating speed of a rotor and the argon flow; casting; and carryingout a soaking treatment. According to the method, a hydrogen content and an alkali metal content of the aluminum alloy can be effectively reduced, the probability of cracking of a cast ingot is reduced, and the production percent of pass is improved.

The invention relates to an electrolyte used for magnesium alloy anode oxidation treatment and a treatment method. The electrolyte comprises the following components of 20-60ml/L of polyaspartic acid salt, 40-100g/L of alkali metal silicate, 10-40g/L of boric acid or sodium tetraborate, 150-300ml/L of ammonia water or 50-200ml/L of organic amine and 20-60mg/L of sodium gluconate serving as additive, wherein the pH (potential of hydrogen) value of the electrolyte is 11-13. When the electrolyte disclosed by the invention is adopted for anode oxidation surface treatment on the magnesium alloy, one layer of smooth, even and compact ceramic layer with good corrosion resistance is formed on the surface of the magnesium alloy, the electrolyte can not pollute the environment and has a good favorable application prospect.

The invention discloses a calcium citrate producing method includes following steps: (1) contacting a citric acid fermentation clear liquid with heavy calcium carbonate to obtain a crude calcium citrate crystal; (2) acidically hydrolyzing the crude calcium citrate crystal with hydrochloric acid to obtain a solution and filtering the solution; and (3) contacting a filtrate with one or more of a carbonate of alkali metals, a hydroxide of the alkali metals, an oxide of the alkali metals, ammonium carbonate and ammonium bicarbonate. The producing method can obtain the crude calcium citrate crystal precipitation directly through reaction between the simply-filtered impurity-containing crude citric acid fermentation clear liquid and the heavy calcium carbonate and then the high-purity calcium citrate, which is 99.9-99.99% in purity and can reach a standard in United States Pharmacopeia USP33-NF28 and American food additives FCC5, can be obtain just by performing one filtering process for removing impurities and performing a contact reaction between the obtained filtrate and one or more of the carbonate of alkali metals, the hydroxide of the alkali metals, the oxide of the alkali metals, the ammonium carbonate and the ammonium bicarbonate.

A polymethylacrylic acid higher ester pour point depressant has polymerization reaction formulas shown in the formula (I) and the formula (II) defined in the specification. A preparation method comprises the steps: a synthetic asymmetric double-Schiff alkali metal complex (nickel system, copper system and other post-transition metal complexes) as a main catalyst, a catalytic system is formed fromthe complex and azodiisobutyronitrile or benzoperoxide, and methacrylate higher ester monomers are catalyzed to undergo a polymerization reaction to produce the polymethylacrylic acid higher ester polymer under certain conditions. The polymethylacrylic acid higher ester polymer prepared by the method has a certain pour point depressing effect on diesel distillates or lubricating oil fractions andis used as a pour point depressant for diesel or lubricating oil.

The invention relates to a preparation method of diphenyl ether dianhydride and isomers thereof, which is characterized in that the preparation method comprises the following steps of: adding solvent and monochlorophthalic anhydride into a reactor with a drying and distilling device, increasing temperature for reflux for a certain period under the protection of N2, adding alkali metal salt and catalysts, conducting reflux reaction for a certain period, decreasing the temperature, conducting filtration to obtain crude products, adding cyanophenyl and the crude products prepared through the reaction into the clean reactor with the drying and distilling device, increasing the temperature for reflux for a certain period under the protection of N2, decreasing the temperature, conducting filtration and drying to obtain the diphenyl ether dianhydride and the isomers thereof. The preparation method provided by the invention has the advantages that the synthesis method of the diphenyl ether dianhydride is widened, the preparation process of the diphenyl ether dianhydride is simplified, the environmental pollution is reduced and a new method is provided for the industrial production of the diphenyl ether dianhydride.

A composition for use as a stain blocker and a method of treating substrates therewith, said composition comprising a polymer of Formula 1 having the following repeating units in random sequence

wherein

• • R¹ is H, methyl or ethyl;
  • R² and R³ are each independently H, C₁ to about C₁₀ alkyl, —COOR⁴, CONR⁵R⁶, or —CN;
  • R⁴ is M, C₁ to about C₂₀ alkyl, or C₆ to C₁₀ aryl;
  • R⁵ and R⁶ are each independently H, C₁ to C₁₀ alkyl, C₆ to C₁₀ aryl, or R⁵ and R⁶ together with the nitrogen atom form a morpholine, pyrrolidine, or piperidine ring;
  • R⁷ is a C₄ to C₈ alkyl group; M is H, an alkali metal or alkali earth metal; h is about 10 to 100 mole %; i is 0 to about 80 mole %; j is 0 to about 60 mole %; k and n are each independently 0 to about 40 mole %; and m is 0.01 to about 0.5; provided that h+i+j+k+n equals 100, and provided that i+j+k+n is greater than zero, except when h is 100%.

The invention relates to a technology for relieving scorification of a convection heated surface of a boiler, in particular to a system for relieving scorification of the convection heated surface of a boiler. The system comprises a crust block machine arranged in a flue of a boiler, wherein the crust block machine is positioned at the front end of the windward side of a convection superheater at the top of the flue; the crust block machine comprises two symmetrically arranged disks and a straight pipe fixedly arranged between the two disks; and the crust block machine can roll in the axial direction of the flue. The crust block machine is applicable to various boilers using high-alkali metal content coal; scorification can be made in advance; safe operation of the convection heated surface is ensured; the operation time of the boiler is increased; offset of smoke temperature at a hearth outlet and uneven flow field caused by combustion of a quadrangle tangent circle boiler are reduced by the arrangement of the crust block machine; frequent explosion of the convection superheater and the reheater is avoided; normal operation of the boiler is not affected in the process of slag removal and scorification cleaning; the operation time of the boiler is prolonged; and the economical efficiency of a power plant is improved.

The technical problem to be solved by the invention is to provide a preparation method for a catalyst for preparing chloroethylene via ethane oxychlorination. The catalyst contains rare-earth elements, alkali metal elements, iron element, tin element and titanium dioxide, and is applied to a fixed bed reactor; the preparation method for the catalyst is simple in process, low in reaction temperature, and reduced in energy consumption; air is used as a raw material gas, so that the cost is low; and the prepared catalyst has good catalytic activity while being applied to a reaction for preparing chloroethylene via ethane oxychlorination, the conversion rate of ethane is 80-100%, and the selectivity of chloroethylene is 40-68%.

Thermally developable materials including photothermographic and thermographic materials have a buried conductive backside layer comprising one or more binder polymers in which are dispersed each of at least two types of conductive materials: (1) nanoparticles of one or more conductive metal compounds, and (2) one or more organic solvent soluble inorganic alkali metal salt antistatic compounds. These buried conductive backside coatings provide conductivity that is affected minimally by humidity.

The invention provides a purifying agent for a compound containing aldehyde impurities and application of the purifying agent. The purifying agent comprises borohydride of alkali metal and hydrazine hydrate, wherein the molar percentage of the borohydride of alkali metal is 2-20%, and the molar percentage of the hydrazine hydrate is 80-98%. When the purifying agent is added in the rectification and purification process of crude epoxypropane or crude isopentenyl alcohol containing 50-1000 ppm of aldehyde impurities, the content of the aldehyde impurities can be reduced to 20 ppm or below. The problems that in the prior art, the removal efficiency of impurity aldehydes in the crude epoxypropane or crude isopentenyl alcohol is low, and the purity of the obtained product is limited are solved. The purifying agent provided by the invention is high in impurity removal efficiency and convenient to apply.