103 results about "Barium sulfide" patented technology

The invention discloses a liquid making technique for manganese oxide ore, comprising the steps of: adding the manganese oxide ore powder, pyrite powder, sulfuric acid solution into a leaching vat forleaching; adding a neutralizing agent for neutralizing after reaching leaching termination; adding ammonia sulfate, potassium permanganate and sodium dimethyldithiocarbamate into the neutralization liquid after filtration until the nickel is qualitatively removed; then, adding barium sulfide or adding barium sulfide into the filtrate after filtration, wherein the dosage of barium sulfide is 100-2000g/m<3> manganese sulfate solution; adding XY-3 impurity removal agent after filtration, wherein the dosage of XY-3 impurity removal agent is 50-400g/m<3> manganese sulfate solution, the temperatureis controlled at 30-80 DEG C, the reaction time is 0.5-3h, and the pH is 4.5-6.9; and filtrating to obtained purified manganese sulfate solution. The recovery rate of the qualified, refined and purified manganese sulfate solution is more than 90%, based on common electrolytic technique, the quality of products achieves national standard, the electrolytic yield is larger than 3kg/veneer, the powerconsumption is not more than 7500kwh/t, and the yield, cost and efficiency are all better than the traditional level of manganous carbonate production.

the invention provides a composition having laser engraving properties, comprising a host material and a laser enhancing additive. The host material comprises a material, such as a polymer, modified by a first process, whereby the host material as modified by the first process has increased thermal conductivity as compared to the host material before the first process. The laser enhancing additive comprises a first quantity of at least one of copper potassium iodide (CuKI₃), Copper Iodide (CuI), potassium iodide (KI), sodium iodide (NaI), and aluminum iodide (AlI), and a second quantity of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.

The invention relates to barium carbonate, a preparation method of the barium carbonate and a carbonizer. The preparation method of barium carbonate comprises the steps of: (1) conveying barium sulfide solution to the carbonizer, wherein the barium sulfide solution has the solubility of 120-170g/L at the temperature of 65-75 DEG C; (2) introducing carbon dioxide gas to a central tube (3) of the carbonizer, and simultaneously spraying the barium sulfide solution to the central tube (3) of the carbonizer to react with carbon dioxide gas; and (3) persistently and circularly spraying the solution containing barium sulfide to the central tube (3) of the carbonizer by a circulating pipe (4), stopping reaction until the barium sulfide concentration in the solution containing barium sulfide is smaller than 0.25g/L, and carrying out solid-liquid separation to obtain the barium carbonate product. According to the barium carbonate, a preparation method of the barium carbonate and a carbonizer provided by the invention, the barium sulfide solution is sprayed by single tower body internal circulation of the carbonizer, so that rapid reaction is carried out between the barium sulfide solution and the carbon dioxide gas, the reaction nucleation rate is increased and the crystal development and growth is slow, therefore, obtained barium carbonate has narrow particle size distribution, and the reaction activity is increased to more than 85%.

The invention provides a preparation method of a heavy metal sewage treatment medicament. The preparation method comprises the following steps: preparing raw materials including barium sulfide, ferric sulfate, polymeric silicate aluminum sulfate, calcium hydroxide and lithopone; adding barium sulfide, ferric sulfate and polymeric silicate aluminum sulfate into a reactor; stirring and heating to 120 DEG C, and carrying out backflow for 6-9 hours while maintaining the reaction temperature at 110-130 DEG C; adding water to dilute calcium hydroxide, and adequately stirring the solution with dried jelly; carrying out boiling reaction at 100 DEG C, so as to prepare a mother solution; filtering the mother solution after the reaction to obtain filtrate for later use, and recycling filter residues; cooling the mother solution at the room temperature, adding lithopone into the reactor, uniformly stirring until initial condensation; heating at 60-80 DEG C for 1-3 hours, stirring for 15 minutes, and using at 5-50 DEG C. The heavy metal sewage treatment medicament is wide in application range, good in sedimentation effect, water purification quality, dehydration property, compression property and effluent quality and low in treatment cost and can serve as a dehydration flocculant.

The invention discloses a sewage treatment agent and a preparing method thereof. The sewage treatment agent is prepared from, by weight, 30-36 parts of kaolin, 28-32 parts of bentonite, 26-28 parts of seaweed meal, 22-24 parts of activated carbon, 20-24 parts of aluminum ash, 20-22 parts of poly-silicon aluminum sulfate, 18-24 parts of citric acid, 18-22 parts of polyferric chloride, 14-18 parts of zinc acetate, 18-20 parts of sodium carbonate, 16-18 parts of potassium persulfate, 14-18 parts of sodium hydroxide, 20-22 parts of chitosan, 22-24 parts of barium sulfide and 18-22 parts of dimethyl diallyl. The sewage treatment agent is environmentally friendly, free of toxicity, high in purification speed and good in purification effect.

The invention discloses a submicron flake-shaped barium sulfate and a preparation method thereof. The preparation method comprises the following steps: (1) pretreating barium sulfate, namely, preparing sulfur into a sulfur aqueous solution with the concentration of 4.0+/-0.5mol/L, degassing under stirring, and subsequently cooling and filtering so as to obtain pretreated sulfuric acid; (2) pretreating barium sulfide, namely, performing hot filtration on the barium sulfide solution with the concentration of 60-90g/L so as to obtain pretreated barium sulfide; (3) continuously synthesizing, namely, stirring to react the obtained BaS solution with the sulfuric acid obtained in the step (1) in the flow of 600+/-50L/h, and keeping the concentration of the sulfuric acid in the reaction solution be greater than 3.0g/L in the reaction process so as to obtain reaction slurry; (4) performing an aftertreatment procedure; and (5) performing a finished product procedure so as to obtain the barium sulfate product. The barium sulfate is flake-shaped, the barium sulfate content is within 99.4-99.5%, the whiteness is greater than 99.5%, and D50 is within the range of 0.70-0.80 micron.

The invention relates to the technical field of brake pads. The brake pad comprises raw materials including, by weight, 20 parts to 25 parts of ceramic fibers, 5 parts to 10 parts of carbon fibers, 5 parts to 10 parts of steel fibers, 15 parts to 18 parts of modified phenolic resin, 6 parts to 10 parts of calcium oxide, 6 parts to 8 parts of barium sulfide, 15 parts to 20 parts of crystalline flake graphite, 1 part to 3 parts of zirconite, 5 parts to 10 parts of butyl butylbenzene, 10 parts to 15 parts of butyronitrile powder, 3 parts to 5 parts of molybdenum disulfide, 1 part to 2 parts of a bonding agent, 5 parts to 10 parts of blanc fixe, 0.5 part to 3 parts of zinc oxide, 5 parts to 10 parts of rubber powder, 1 part to 2 parts of fluorite powder and 0.5 part to 1 part of silicon carbide. The invention further provides a preparing method of the anti-corrosion brake pad. The method comprises the steps that resin and other powdery materials are put to be mixed and stirred, the fiber materials are added for stirring, hot pressing is carried out, and the brake pad formed through pressing is subject to heat treatment. The brake pad has the beneficial effects of being good in heat resistance, resistant to wear, high in toughness and not prone to corrosion.

The invention discloses a heavy metal wastewater treatment disinfectant. The heavy metal wastewater treatment disinfectant is prepared from the following raw materials in percentage by weight: 30-50% of barium sulfide, 10-30% of calcium carbonate, 10-30% of calcium hydroxide and 20-30% of ferrous sulfate. According to the heavy metal wastewater treatment disinfectant provided by the invention, the problems that similar existing products are insufficient and the heavy metal wastewater treatment is difficult are solved, the sources of the raw materials are wide, and the costs of the raw materials are low; when the heavy metal wastewater treatment disinfectant is applied to the heavy metal wastewater treatment, the use is convenient, meanwhile, the cost is low, the pollution caused by the heavy metal wastewater can be effectively solved, the discharge water of enterprises is helped to meet a national discharged standard, and the environmental pollution is avoided.

The invention discloses heavy metal sewage treatment particles and a preparation method thereof. The heavy metal sewage treatment particles are prepared from the following materials in parts by weight: 11-23 parts of activated carbon, 8-16 parts of chitosan, 14-26 parts of epoxy resin, 10-18 parts of meerschaum, 7-13 parts of smectite, 9-15 parts of alginic acid, 6-14 parts of gelatin, 15-25 parts of alum, 5-10 parts of barium sulfide, 8-14 parts of calcium carbonate, 11-16 parts of cellulose, 4-8 parts of nano titanium dioxide, 6-14 parts of hydrotalcite, 13-19 parts of silica gel and 9-19 parts of sodium sulfhydrate. The heavy metal sewage treatment particles can quickly precipitate heavy metals, and can sterilize and clean the water source.

The invention relates to a manufacturing process for producing a synthetic reducing agent by using waste slag of electrolytic manganese and application of the synthetic reducing agent. The manufacturing process comprises the following steps of: adding manganese slag into mixed liquid of sulfuric acid and lixivium and performing pressure filtration after a reaction is finished to obtain the waste slag and feed liquid 1; b, mixing solution of barium sulfide with ammonium sulfate in a mass ratio of barium sulfide to ammonium sulfate of 1:(0.4-0.5), and performing pressure filtration after reaction and removing precipitate to obtain feed liquid 2; and c, adding the feed liquid 1 into the feed liquid 2, performing pressure filtration to separate out the synthetic reducing agent after a reaction is finished and the lixivium, and then recycling the lixivium into the step a. The synthetic reducing agent has the advantages of efficiently reducing and utilizing manganese dioxide ore, using the waste slag of the electrolytic manganese as a main raw material, largely consuming the waste manganese, and largely reducing the waste slag and carbon dioxide generated in the manufacturing process for leaching and producing the electrolytic manganese by using manganese carbonate and reducing the manganese dioxide ore and by other reduction methods.

As barium sulfate which is used as a filler of a resin composition for an electronic equipment, a precipitated barium sulfate which is synthesized from barium sulfide contains a sulfur component as an impurity so that metal parts such as electrodes of electronic parts maybe deteriorated and corroded by a hydrogen sulfide component volatilized from the barium sulfate to reduce the function, the durability, and the reliability of electronic equipment when used for resin compositions such as an ink, a film, and a sheet which are used for an electronic equipment.

Barium sulfate composite particles having a zinc compound adhered to the particle surface and having an average particle diameter of 0.01 to 10 μm.

A titania composite and a preparing method thereof are provided. The titania composite comprises an inner core and a coating film layer, wherein the inner core is a barium sulfate crystal and/or a strontitum sulfate crystal with subsphaeroidal shape, having a particle size of less than 1 μm and whiteness of more than 98%, and the coating film layer is nano rutile titania. The preparing method thereof comprises the following steps: (a) preparing barium sulfate or strontium sulfate; (b) coating treatment; (c) subjecting the titania composite to a high-temperature heat treatment; and (d) subjecting the titania composite to a post treatment. The subsphaeroidal titania composite is obtained by chemically synthesizing a subsphaeroidal submicron barium sulfide or strontium sulfide, and then hydrolyzing and coating thereon to form a coating film layer of titania to make titania grow evenly. The particle size of the titania composite is small, and the particle size distribution range of the titania composite is controllable.

The invention relates to a method for directly preparing a high-purity manganese sulfate solution from low grade rhodochrosite sulfuric acid extraction liquid. The rule that the PH value of a system is changed from small to large is implemented, and an efficient chemical coupling mechanism is played. The method includes the steps that firstly, manganese mineral powder is continuously dissolved into low grade manganese ore sulfuric acid extraction liquid, the pH value of the extraction liquid is sequentially adjusted with barium hydroxide to reach 3 to 4, then barium fluoride is added, and filtering is carried out; secondly, the pH value of filter liquor is adjusted with barium hydroxide to reach 5 to 6, then barium sulfide is added, filtering is carried out, and new filter liquor is obtained; and finally, the PH value of the new filter liquor is adjusted with barium hydroxide to reach 8, and filtering is carried out to obtain the high-purity manganese sulfate solution. The method is simple in operation, medicament waste caused by operation for repeatedly adjusting the PH value of the system in an overlapped manner is avoided, the manganese content in the prepared high-purity manganese sulfate solution is larger than or equal to 80 g/L, the main impurity contents are all smaller than or equal to 10 ppm, the heavy metal content is smaller than or equal to 1 ppm, and the short-process low-consumption free-pollution high-purity manganese sulfate solution preparing method is provided.

The invention discloses a method for continuously preparing hydrogen sulfide and coproducing nano barium sulfate through a microreactor. The method comprises the following steps: dissolving barium sulfide in a dissolving tank at the temperature of 60-90 DEG C; filtering, and preparing a solution from desalted water to obtain a 0.5-2mol/L barium sulfide solution; storing into a storing tank A; preparing a 0.5-2mol/L sulfuric acid solution from industrial sulfuric acid in a storing tank B; pumping the barium sulfide solution in the storing tank A and the sulfuric acid solution in the storing tank B into the microreactor based on the molar ratio of 1: (1-1.1); and reacting at the temperature of 60-90 DEG C to obtain barium sulfide slurry and hydrogen sulfide; collecting the overflowing hydrogen sulfide and storing in a buffering gas tank; filtering the barium sulfide slurry; washing and separating with the desalted water; and performing spray drying at the temperature of 110-150 DEG C toobtain the nanobarium sulfate powder. With the adoption of the method, the hydrogen sulfide can be continuously produced; the cost is low; and the quality is stable.

A method for preparing silica modified barium sulfate powder comprises the following steps: adding a barium sulfide solution into a sodium carbonate solution, performing stirring reacting at 20-95 DEGC for 0.5-4 h, filtering the obtained solution, adding the obtained filter cake into a sodium sulfate solution, performing high-shearing stirring reacting at 20-95 DEG C for 0.5-8 h, adding sodium silicate accounting for 0.1-10% of the mole of the barium sulfide, adding a sulfuric acid solution according to a molar ratio of sulfuric acid to the sodium silicate being (1.1-1.2):1, continuously performing stirring reacting for 1-2 h, and sequentially carrying out filtration, water washing and 100-200 DEG C drying to obtain the silica modified barium sulfate. The method has the advantages of simple process, less device investment, and realization of large-scale industrialization.

The invention discloses a composite water treatment agent and a preparation method thereof. The composite water treatment agent comprises the following raw materials in parts by weight: 20-40 parts of aluminizing zinc slag, 15-25 parts of coal ash, 10-20 parts of plant fibers, 5-10 parts of sulfuric acid, 30-50 parts of sodium hydroxide, 2-4 parts of barium sulfide, 3-5 parts of iron sulfate, 4-6 parts of poly-silicon aluminum sulfate, 5-10 parts of maleic anhydride, 3-5 parts of 2-acrylamide-2-methylpropane sulfonic acid powder, 2-4 parts of sodium tungstate and 20-40 parts of hydrogen peroxide. The composite water treatment agent disclosed by the invention has a very good corrosion and scale inhibition effect, is wide in range of application, is high in universality, and has good effects in treating industrial wastewater of metallurgy, heavy metals, mines, printing and dyeing, spinning, building, casting, chemistry, power, leather, paper-making and the like as well as urban comprehensive sewage, is good in purifying quality, and is low in treatment cost; and after the composite water treatment agent is added into the sewage, coagulation reaction is quick, floc strength is high, precipitation is quick, clarifying and layering are easy, and efficiency is high.

The invention discloses a production method of micro-particle size precipitated barium sulfate. The production method comprises the following steps: (S100) dissolving roughed barium sulfide black ash into water, so as to prepare a clear barium sulfide solution with a concentration of 190g/L-200g/L and a temperature higher than or equal to 85 DEG C for later use; (S200) preparing a clear sodium sulfate solution with a concentration of 280g/L-300g/L and a temperature higher than or equal to 85 DEG C from sodium sulfate for later use; (S300) preparing a sodium silicate solution for later use, wherein the addition amount of the sodium silicate solution is 1g/m<3>-10g/m<3>; (S400) mixing the prepared barium sulfide solution with the prepared sodium sulfate solution to react in a reactor, stirring at a speed of 15rov/min-25rov/min to control the uniformity of the reaction, and when the barium content in the solution is slightly large, adding the sodium silicate solution to react for 1h-1.5h so as to reach an equivalent point; (S500) filtering the solution after the reaction, washing until no sulfur ion exists, pulping a barium cake with water, and regulating the pH value to 6.5-7.5 with concentrated sulfuric acid or phosphoric acid; and (S600) filtering barium pulp obtained in the step (500), and carrying out expansion drying at 200-300 DEG C. Barium sulfate prepared by virtue of the production method is high in purity and small in particle size and can be widely applied.

The invention belongs to the technical field of chemical and industrial three-waste disposal and utilization, in particular to a method for coproducing sodium sulphide and industrial salts while preparing precipitated barium sulfate from barium sulfide waste slag. In the main technical scheme of the invention, hydrochloric acid is mainly and fully used for acidification to completely remove insoluble impurities so as to obtain purer solutions such as barium chloride and the like, then, sodium sulfate is used for exchange to obtain precipitated barium sulfate and byproducts of the sodium sulphide and the industrial salts, therefore, by using the invention, a large amount of barium sulfide waste slag is eliminated when products with higher economic value are prepared. The method of the invention has the advantages of low production cost, high profit, large market demand and simple process and production equipment, belongs to a very practical treatment and utilization method, not only can create considerable economic value, but also can eliminate the chemical and industrial waste slag and control the environment pollution, particularly has thoroughly control results on the barium sulfide waste slag, and avoids secondary pollution and hidden trouble in environment protection.

The invention discloses domestic ceramic for daily use with high strength and impact resistance. The ceramic is prepared by the following raw materials in parts by weight: 3-4 parts of zirconia, 2-3 parts of barium sulfide, 14-16 parts of wollastonite powder, 4-5 parts of quartz sand, 2-3 parts of an organosilicon antiseptic, 10-13 parts of smectite clay, 2-3 parts of citric acid, 14-17 parts of attapulgite, 21-24 parts of potash feldspar, 3-4 parts of sodium carboxymethylcellulose, 1-2 parts of sodium pyrophosphate, 3-4 parts of polyether, 40-45 parts of fly ash, 35-40 parts of white glaze balls, 6-8 parts of waste glass, 10-14 parts of Maifan stones, 21-25 parts of green tea, 14-17 parts of orange peels, 6-8 parts of shell powder, 4-6 parts of shrimp shell powder, 0.2-0.3 parts of polyvinyl alcohol, 0.2-0.3 parts of tributyl phosphate, and a proper amount of deionized water. The ceramic with impact resistance is affinitive to human body, a plurality of elements are needed by human body, and the ceramic has the advantages of high sterilization rate, good heat stability, stable chemical properties, lightweight, fine art, impact resistance, high strength, and high practicality.