966 results about "Copper chloride" patented technology

The invention relates to a method for producing copper chloride hydroxide and blue vitriod by using cupriferous etching wastewater; the method comprises the following steps: acidic copper chloride etching wastewater and alkaline copper chloride etching wastewater are neutralized and crystallized to get acidic copper chloride crystal under the condition of strictly controlling filling liquid and the Ph range of a reaction kettle, and then pumped and filtrated, and centrifugated; part of the obtained alkaline copper chloride crystal is dried to obtain finished products while the other is added with NaOH solution for alkali conversion to obtain copper oxide, and then is acidulated by sulphuric acid, crystallized, washed, centrifugated, and dried to obtain blue vitriod products. The method for producing blue vitriod by directly using sulphuric acid-oxyful etching wastewater includes the following steps: sulphuric acid-oxyful etching wastewater and composition brass wasterwater in a PCB manufacture are blended together and added with NaOH to form cupric hydroxide precipitation which filtrated, washed, and then acidulated by sulphuric acid to obtain copper sulphate solution; after the copper sulphate solution is cooled, crystallized, centrifugated and dried, and the blue vitriod is obtained.

Compositions having antimicrobial activity contain particles comprising at least one inorganic copper salt; and at least one functionalizing agent in contact with the particles, the functionalizing agent stabilizing the particle in a carrier such that an antimicrobially effective amount of ions are released into the environment of a microbe. The average size of the particles ranges from about 1000 nm to about 3 nm. Preferred copper salts include copper iodide, copper bromide and copper chloride, most preferred being copper iodide. Preferred functionalizing agents comprise materials with a molecular weight of 60 or above, which include amino acids, other acidic materials, thiols, hydrophilic polymers, emulsions of hydrophobic polymers and surfactants. The functionalized particles are preferably made by a grinding process.

Embodiments of the invention are directed to a composition having antimicrobial activity comprising particles comprising at least one inorganic copper salt; and at least one functionalizing agent in contact with the particles, the functionalizing agent stabilizing the particle in a carrier such that an antimicrobially effective amount of ions are released into the environment of a microbe. The average size of the particles ranges from about 1000 nm to about 4 nm. Preferred copper salts include copper iodide, copper bromide and copper chloride. Preferred functionalizing agents include amino acids, thiols, hydrophilic polymers, emulsions of hydrophobic polymers and surfactants.

The invention discloses a preparation method of nano cuprous oxide. In the method, copper chloride and copper nitrate are taken as copper sources, hydrazine hydrate, glucose and an ascorbic acid and the like are taken as reducing agents, and cuprous oxide materials in the shape of an octahedron, a hollow sphere, a cube and a hollow cube and the like are successfully obtained by using a liquid-phase reduction method and a hydrothermal method. Required raw materials for preparation are rich, the cost is low, and no waste is produced. The preparation process is simple, and the repeatability is good. Cuprous oxide nano-materials have wide applications in the aspects of photocatalysis, gas-sensing materials, antibacterial materials, and the like.

An improved process calcining a gypsum/cellulosic fiber slurry to produce a composite gypsum/cellulosic fiber product resides in adding a selected crystal modifier to the gypsum/cellulosic fiber slurry prior to the heating step to reduce the time necessary to carry out the calcination process, to reduce the temperature at which the calcination process is run or to increase the aspect ratio of the acicular calcium sulfate alpha hemihydrate crystals formed during the calcination process. Useful crystal modifiers include aluminum sulfate, aluminum chloride, chlorine, zinc sulfate, iron (III) sulfate, aluminum sulfate hexadecahydrate, iron (II) sulfate heptahydrate, iron (III) sulfate pentahydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, copper chloride dehydrate, manganese sulfate monohydrate and trisodium phosphate.

The invention relates to a pig feed, in particular to a nursery pig concentrated feed, comprising the following raw materials by weight proportion: 30-50 of sucking pig composite vitamin, 30-50 of low copper mineral element, 60-100 of peeled soybean meal, 100-180 of fermented soybean meal, 100-150 of extruded soybean, 110-180 of steam fish meal, 50-100 of dried porcine soluble, 60-120 of acid whey powder, 80-90 of glucose powder, 5-10 of glutamine, 80-100 of chyle fat powder, 40-49 of calcium carbonate, 12-14 of basic zinc chloride, 4-6 of salt, 55-60 of calcium biphosphate, 6-10 of sodium butyrate, 12-15 of lysine, 6-8 of threonine, 4-6 of TP-100 enzyme, 4-5 of cysteine, 5-7 of se-enriched yeast and 6-10 of copper chloride hydroxide. The nursery pig concentrated feed has the advantages of milk nutrition composition simulation, good palatability, high digestibility, large feed intake because the baby pigs like to eat and improvement of survival rate as well as immunity of the nursery pigs.

Embodiments of the invention are directed to a composition having antimicrobial activity comprising particles comprising at least one inorganic copper salt; and at least one functionalizing agent in contact with the particles, the functionalizing agent stabilizing the particle in a carrier such that an antimicrobially effective amount of ions are released into the environment of a microbe. The average size of the particles ranges from about 1000 nm to about 4 nm. Preferred copper salts include copper iodide, copper bromide and copper chloride. Preferred functionalizing agents include amino acids, thiols, hydrophilic polymers emulsions of hydrophobic polymers and surfactants.

The invention provides a boiler coal combustion-improving desulfurizing and denitrifying agent composition. The composition comprises the following raw materials in parts by weight: 2-7 parts of sodium carbonate, 1-3 parts of alumina, 2-8 parts of aluminium hydroxide, 2-5 parts of ferric trichloride, 2-6 parts of ferric oxide, 3-10 parts of potassium permanganate, 3-10 parts of potassium chlorate, 10-35 parts of activated attapulgite clay, 15-30 parts of urea, 2-4 parts of ammonium formate, 2-4 parts of ammonium chloride, 6-23 parts of ammonium acetate, 3-9 parts of manganese oxide, 9-12 parts of copper chloride, 1-3 parts of copper oxide, 2-4 parts of zinc sulfate, 1-3 parts of zinc nitrate, 7-18 parts of potassium dichromate, 1.0-1.5 parts of titanium dioxide, 0.5-1.0 part of barium molybdate, 0.5-1.5 parts of cobalt sulfate, 0.5-1.5 parts of vanadium pentoxide, 0.3-0.7 part of cerium oxide, 0.1-0.2 part of sodium dodecyl benzene sulfonate and 0.1-0.2 part of alkyl glyceryl ether. The composition is convenient to use, has stable properties, plays roles of combustion improving, desulfurization and denitrification, has coal saving rate of 8-25% and can remove fixed sulfur by 50-70%.

The invention relates to a method for preparing a core-shell structure metal/polymer nanofiber membrane. The prepared fiber membrane uses a polymer as a nuclear layer and uses a nano-metal as a shell layer; the polymer can be polyvinyl pyrrolidone, polyvinyl alcohol, polyoxyethylene, polylactic acid, polyacrylonitrile, hyaluronic acid, chitosan and the like; the nano-metal shell layer comes from metal salt silver nitrate or copper chloride. The core-shell structure metal/polymer nanofiber is prepared by utilizing the electrospinning technique; by controlling the process parameters, the concentration of polymer, the content of metal salt and the proportioning of solvents, the metal/polymer nanofiber membrane is prepared; the fiber membrane has high application value on tissue engineering, recovery of wound, drug transportation, photoelectricity and the like.

The invention discloses a process for manufacturing a 12OZ thick copper multilayer circuit board. In an inner layer etching process, the concentration of CU2+ in an acid copper chloride etching solution is controlled to be 150+/-20g/l, the temperature is 50+/-3 DEG C, total acidity is 2.8+/-0.6N, specific gravity is 1.30+/-0.10, etching speed is 1.2+/-m/min, and the number of etching times is 4 times; a plate pressing process comprises a hot pressing step and a cold pressing step, wherein the hot pressing time is 200 minutes, a system is vaccumized at absolute pressure of 10mbar between the fifth minute and the ninety-fifth minutes, the maximum press plate pressure is controlled to be 21.42Kgf/cm2, and the temperature is 190 DEG C; the time for cold pressing is 110 minutes, and the maximum press plate pressure is controlled to be 18.36Kgf/cm2; when the diameter D of a prebored hole is more than or equal to 2.0mm and is less than 4.8mm, a drill bit with diameter d of less than or equal to 1.7mm is used to prebore 4 holes, and the holes are redrilled by using a drill bit with the diameter D. The process has the advantages of improving the etching factors of the plate material of the inner layer, reducing the side etching effect with good plate pressing effect and protecting the bored holes from the phenomenon that the holes are blocked by copper scarp.

The invention relates to a method for recycling ammonian in ammonian waste water with high concentration, in particular to a method for recycling ammonian in printed wiring board waste water; crystallization mother liquid containing ammonium chloride with high concentration which is generated from processes such as producing alkaline copper chloride, Alpha crystallization type alkaline copper, blue vitriod and the like by using wiring board etching waster water, firstly is evaporated, concentrated and crystallized by one or two combination in multiple effect evaporation technique of mechanical compression, evaporating and compression with heat so as to recycle most ammonium chloride; secondly, Ph is adjusted and ammonian is evaporated so as to recycle ammonia or ammonium sulphate; ammonian waste water generated from removing tin water from ammonia and recycling tin mud are treated by evaporating ammoniac after directly adjusting Ph; and the residual sewage is further treated in the sewage treatment system. By using the method, both of the removal rates of ammonian waste water for wiring board and the recovery rate of ammonia are more than 99.8 percent; the method has good treatment effect, high efficiency, little amount of steam usage, low running cost, and good popularization and application prospect.

The invention discloses a corrosive capable of displaying an ultra low carbon solidification arborescent structure and a preparation method thereof. The corrosive is prepared from the following components: picric acid, stannous chloride, copper chloride, hydrochloric acid, surfactant, absolute ethyl alcohol and distilled water. The preparation method is as follows: taking a specified amount of the distilled water, and equally dividing the distilled water into two parts; mixing and putting solid medicament into a glass container according to fixed quantity, and adding one part of the distilledwater into the solid mixed medicament to dissolve the medicament; adding a specified amount of the absolute ethyl alcohol into another part of spare distilled water; adding a hydrochloric acid solution into the absolute ethyl alcohol solution; mixing the ethyl alcohol and the hydrochloric acid solution which are poured into an aqueous solution containing the solid medicament; fully stirring; and finally adding the surfactant to finish preparing. By utilizing the reagent provided by the invention, the solidified arborescent structure forms of ultra low C, S, P continuous casting steel billets can be displayed clearly, a finish requirement on sample surface is lowered, the sample preparation working procedure is simplified and the larbour intensity of operators is lowered.

The invention discloses a method for producing tribasic copper chloride. The method for producing the tribasic copper chloride includes the following steps of: (1) removing impurities from an acidic etching waste solution; (2) adding clean water or a tirbasic copper chloride production mother solution to a synthesis reactor, performing preheating, and then, preheating the acidic etching waste solution whose impurities have been removed and an alkaline solution of sodium hydroxide and mixing the two solutions for a reaction with the pH value and temperature of the reaction being controlled so as to gradually form the tribasic copper chloride, and discharging partial materials after a certain amount of reaction time; (3) filtering the materials discharged from the reaction system, and performing washing, suction filtration, centrifugation and drying on the filtrated residues to obtain the tribasic copper chloride; and (4) performing ammonia nitrogen removal treatment on filtrated liquid. By adopting the method for producing the tribasic copper chloride in the invention, continuous production can be achieved and the tribasic copper chloride with large particle size and high purity can be produced; further, production cost can be reduced and overall process can be integrated; and the method for producing the tribasic copper chloride is advantaged in simple ultimate steps of ammonia nitrogen removal, easiness in operation as well as reduced difficulty and cost of ammonia nitrogen treatment.

The invention discloses a non-noble metal mercury-free catalyst for hydrochlorination of acetylene and a preparation method thereof. The catalyst mainly contains copper, chlorine, a carrier and the balance of catalysis-promoting metallic elements, wherein the copper exists in the form of copper chloride, the chlorine exists in the form of an inorganic salt of chlorine, the carrier is activated carbon or nitrided activated carbon which is subjected to acid cleaning, and the catalysis-promoting metallic elements are one of or a mixture of any of alkali metals, alkaline-earth metals and non-noble metals of which the chloride is non-volatile in transition metallic elements. The preparation method comprises the process steps of preparing impregnation motor liquor, adding a catalyst carrier to perform equivalent-volume impregnation, drying the mixture and the like. The non-noble metal mercury-free catalyst prepared by adopting the method is better in activity, high in selectivity, long in service life, low in cost and environment-friendly, and can be used for hydrochlorination of acetylene during the production of vinyl chloride by using a calcium carbide method.

The invention discloses a three-dimensional nitrogen-doped graphene platinoid-loaded composite electro-catalyst. A preparation method comprises the following steps of ultrasonically dispersing graphene oxide sheet in an aqueous solution, adding urea and soluble nickel salt for full and uniform mixing, transferring the mixture into a hydrothermal reaction kettle for reaction, performing freeze-drying to obtain three-dimensional nitrogen-doped graphene, dissolving the three-dimensional nitrogen-doped graphene in ethylene glycol, sequentially adding chloroplatinic acid, copper chloride dehydrate and glutamic acid, and performing microwave reaction to obtain the catalyst. The method has the characteristics of that energy is saved, the speed is high, and the operation is simple; the raw materials are easy to obtain, the yield is high, the capability of platinum in the direct electro-catalytic oxidation of methanol under an acidic condition can be remarkably improved, peak current is 3 to 4 times than that of a commercial carbon black platinum-loaded electro-catalyst and a commercial carbon black platinum-ruthenium-loaded electro-catalyst, and the prepared catalyst is widely applied to a methanol fuel cell.

The invention discloses a low-mercury catalyst used for synthesizing vinyl chloride. The low-mercury catalyst takes mercuric chloride as a main active component, one or more of precious metals such as Au, Pd, Pt, Ru, Rh, Os and Ir salts or complexes thereof as active regulators, and one or more of potassium chloride, ferric chloride, zinc chloride and copper chloride as cocatalysts. By adding trace amount of precious metal salt into the mercuric chloride, the low-mercury catalyst forms a stable composite metal compound, plays a role in fixing and activating mercuric chloride, and still maintains very high catalytic activity and stability when the load capacity of the mercuric chloride is reduced to 0.1-2%.

The invention discloses an acidic copper chloride etching liquid electrolytic regeneration recycling and copper plate recovery device and method. The device comprises an electrolytic bath which is divided into a cathode region and an anode region by virtue of a composite conductive macromolecular membrane, an etching auxiliary cylinder, an etching liquid waste liquid collecting cylinder, a regenerated liquid collecting cylinder and an exhaust treatment device, wherein the cathode region is internally provided with a cathode electrolytic sheet, the anode region is internally provided with an anode electrolytic sheet, and the etching auxiliary cylinder is internally provided with a gas dissolving device; a waste liquid generated by the etching cylinder is fed to the cathode region of the electrolytic bath by virtue of the etching liquid waste liquid collecting cylinder, a water inlet and a gas outlet are formed in the anode region of the electrolytic bath, the water outlet is communicated with the etching auxiliary cylinder by virtue of the regenerated liquid collecting cylinder, gases generated by the anode region are introduced to the etching auxiliary cylinder by virtue of the gas dissolving device at the gas outlet, the etching auxiliary cylinder is communicated with the etching cylinder, and exhaust gases generated by the etching auxiliary cylinder are fed to the exhaust gas treatment device. The device and method disclosed by the invention solve the problem that an existing acidic copper chloride etching liquid is high in energy consumption of regeneration recycling, low in reuse rate, more in copper impurities of the cathode and the like.

The invention discloses a dendritic crystal corrosion macroscopic examination reagent for solidification structures and defects of a continuous cast blank and a preparation method thereof. The reagent comprises the following components by mass percent: 0.28-1.09% of copper chloride, 0.17-0.27% of magnesium chloride, 0.56-1.60% of ferric chloride, 1.28-1.30% of hydrochloric acid with the mass concentration of 36-38%, 54.70-55.80% of absolute ethyl alcohol and the balance of water. The preparation method comprises the following steps: adding the water into a container, and then adding the copper chloride, magnesium chloride, ferric chloride and hydrochloric acid; and adding the absolute ethyl alcohol after all the added raw materials are fully dissolved, and evenly stirring. Compared with the prior art, the invention solves the problem that other corrosive reagents can not clearly display the dendritic crystal solidification structures of a continuous cast blank; and the reagent has the characteristic of original-size display without expansion or reduction for interior defects of a continuous cast blank when used for dendritic crystal corrosion macroscopic examination on the solidification structures and defects of the continuous cast blank.

The invention relates to a method for preparing monoclinic crystal system crystalline copper oxide and an application of the monoclinic crystal system crystalline copper oxide. The method comprises the following steps: a. a sodium hydroxide or potassium hydroxide water solution with a concentration of between 5 and 50 percent and a volume of between 30 and 80 percent of the volume of a reaction vessel is added into the reaction vessel, preheated to between 30 and 100 DEG C, added with crystalline copper chloride hydroxide with the addition between 1/6 and 1/3 of the mol number of sodium hydroxide, and reacted for 10 to 60 minutes at a reaction temperature of between 30 and 100 DEG C and under the condition of stirring; b. crystalline copper oxide is prepared after washing, pumping filtration, centrifugation and drying of reacted materials; and c. the crystalline copper oxide is crushed by the physical method, and the activated copper oxide with fine granularity are prepared. The method is easy to realize separation of the copper chloride hydroxide and the copper oxide with other water-soluble background salts, and has a simple technique and low production cost; and the crystalline copper oxide prepared has high yield, high purity, high activity, good quality and is suitable for mass production.

Embodiments of the invention are directed to a composition having antimicrobial activity comprising particles comprising at least one inorganic copper salt; and at least one functionalizing agent in contact with the particles, the functionalizing agent stabilizing the particle in a carrier such that an antimicrobially effective amount of ions are released into the environment of a microbe. The average size of the particles ranges from about 1000 nm to about 4 nm. Preferred copper salts include copper iodide, copper bromide and copper chloride. Preferred functionalizing agents include amino acids, thiols, hydrophilic polymers emulsions of hydrophobic polymers and surfactants.

The invention relates to a preparation method for a dendritic copper-palladium nanocrystalline alloy, which comprises the following steps: dissolving a palladium precursor, a copper precursor and a dispersant into a solvent, then adding a reducing agent, performing a reaction at 120-160 DEG C for 1-2 h, and performing centrifugal separation to obtain a dendritic copper-palladium nanocrystalline alloy, wherein the palladium precursor is palladium acetylacetonate, palladium acetate or palladium nitrate; and the copper precursor is copper acetylacetonate, copper chloride, copper nitrate or copper sulfate. The invention further relates to the dendritic copper-palladium nanocrystalline alloy. Dendritic nanocrystals with adjustable sizes and good dispersibility can be prepared according to the preparation method, and the preparation method is simple, has high repeatability and is low in cost.

The invention provides a method for processing acidic etching waste solution of a printed circuit board, wherein the acidic etching waste solution comprises hydrochloric acid and copper chloride. The method comprises the following steps: adding ammoniac regulation solution in the acidic etching waste solution for converting the acidic etching waste solution into an ammoniac etching solution system with the pH value above 7.5, and then carrying out copper extraction. The processing method improves the copper extraction efficiency and ensures that the recovery rate of metallic copper can reach above 99.3 percent; the raffinate is processed to obtain ammonium chloride which can be directly reused for an etching process according to requirements, and the recovery rate of the ammonium chloride can reach above 99.9 percent, thereby not only saving resources, but also avoiding the environment pollution, and really achieving recycling economy and clean production.

The invention mainly takes circuit board acidic copper chloride, or copper nitrate, or copper sulfate etching waste liquid and liquid sodium hydroxide or potassium hydroxide as main raw materials, and the synthesized crude copper oxide is treated by microwave drying, grinding, water washing, ultrasonic washing, secondary microwave drying and grinding, so that copper oxide with the content of more than 99% can be obtained; and the obtained copper oxide can be rapidly dissolved in electroplate liquid, namely is completely dissolved within 30s, and has lower content of impurities. The invention has the advantages of low production cost, simple technique, little pollution caused in the production process, high activity of the produced copper oxide and the like.

The invention discloses a copper phosphide catalyst for synthesizing chloroethylene, which is characterized in that the carrier of the catalyst is active carbon, the active component is Cu3P and the auxiliaries comprise one or more of copper chloride, nickel chloride and barium chloride. The catalyst disclosed by the invention is green, simple in production process and short in production period and shows excellent activity and selectivity in the reaction of synthesizing chloroethylene via the hydrochlorination of acetylene.

The embodiment of the invention discloses a controllable preparation method for a three-dimensional nano self-assembly of copper oxide. The controllable preparation method comprises the following steps: preparing a 2.0-10.0mol/L sodium hydroxide water solution by taking deionized water as a solvent; preparing a copper chloride water solution with the Cu<2+> concentration of 0.01-0.15mol/L by taking anhydrous copper chloride as a copper source and the deionized water as a solvent; dropwise adding the equivalent copper chloride water solution into the sodium hydroxide water solution, and sufficiently stirring; transferring the mixed solution into a reaction kettle, sealing and reacting in a drying oven with the temperature of 100-150 DEG C for 4-8h; and after the reaction is ended, centrifugally collecting the product, respectively cleaning the product many times by using the deionized water and absolute ethyl alcohol, and then, drying at the temperature of 50-70 DEG C for 3-5h to obtain the three-dimensional nano self-assembly of the copper oxide. The spherical, chrysanthemum-like and fan-like three-dimensional self-assembly with a secondary nanosheet structure is prepared from reaction raw materials with low prices at lower temperature by using a hydrothermal synthesis method.

The invention relates to a method for reclaiming an etching solution containing copper chloride and ferric trichloride. The method is characterized by comprising the following steps: reduction of a divalent copper ion and a ferric ion, wherein ferrous powder is added into an etching waste solution, the mol number of Fe atoms in the ferrous powder is the sum of 1.1 to 1.4 times of the mol number of Cu<2+> ions in the etching waste solution and 0.3 to 0.8 time of the mol number of Fe<3+> ions in the etching waste solution, so that Cu<2+> ions can be reduced to elemental copper, the Fe<3+> ions are converted into Fe<2+> ions, the ferrous powder is oxidized into FeCl2, and the concentration of the Fe<2+> ions in the etching waste solution is controlled to be between 190 and 250g/L; regeneration treatment, wherein copper coated ferrous precipitate is separated from the mixed solution, while the rest filtrate is added with 31 to 36 weight percent hydrochloric acid and 33 to 35 weight percent oxydol in sequence, and is introduced with air; and the mixed solution is heated to a temperature of between 100 and 150 DEG C, so that the FeCl2 is oxidized into FeCl3.

The invention relates to a treatment process for organic silica mud. The treatment process comprises the following steps of: disilane hydrolysis, copper chloride leaching, pressing and backwashing, copper replacement, silicon slag roasting and tail gas treatment. According to the treatment process, hydrogen chloride gas generated by hydrolysis is effectively utilized, so that hydrogen chloride gas realizes zero discharge; a stirring reaction kettle is adopted for stirring and leaching, so that a leaching rate of copper is as high as 99%, copper content of sponge copper is 70% or higher, and iron chloride content is 30% or higher, and therefore, the economical value is increased; hydrolysis residues are roasted through a rotary kiln, so that silicon oxide content is greater than 98%, and therefore, the whole process route is free of wastewater and waste residue discharge, the waste gas is only carbon dioxide, harms on environment are reduced to be the lowest, the products are metal copper and silicon powder, and the economical value is high. Throughout the process, zero discharge of wastewater and waste residues is realized, so that the environmental benefits are remarkable; hydrolysis and leaching are performed under normal pressure at a temperature lower than 90 DEG C, requirements on the material and strength of equipment are not high, and a roasting temperature of the rotary kiln ranges from 500 DEG C to 850 DEG C; and moreover, silicon powder does not contain corrosive hydrogen chloride, and requirements on the material of the rotary kiln are not high.

The invention relates to an additive product suitable for coal-fired boilers in the petroleum, chemical and power industries and provides a boiler coal combustion-improving denitrifying agent composition. The composition comprises the following raw materials in parts by weight: 2-8 parts of sodium carbonate, 3-7 parts of aluminium hydroxide, 2-5 parts of ferric trichloride, 6-15 parts of urea, 4-10 parts of ammonium carbonate, 4-10 parts of ammonium chloride, 3-9 parts of ferric oxide, 7-22 parts of potassium permanganate, 7-22 parts of potassium chlorate, 15-40 parts of activated attapulgite clay, 4-8 parts of chromium sesquioxide, 2-6 parts of manganese oxide, 4-8 parts of zinc oxide, 4-8 parts of copper chloride, 2-6 parts of copper oxide, 2-6 parts of copper carbonate, 3-7 parts of zinc sulfate, 2-5 parts of zinc nitrate, 0.5-1.5 parts of barium molybdate, 1-2 parts of titanium oxide, 0.5-1.5 parts of vanadium pentoxide, 0.2-0.5 part of copper sulfate, 0.2-0.5 part of cerium oxide, 1-3 parts of penetrating agent JFC and 0.1-0.2 part of lignosulphonate. The composition is efficient in combustion improving, has high coal saving rate and prolongs the service lives of the boilers.

The invention discloses a process for preparing calcium sulfate crystal whisker by desulfurized gypsum as well as calcium sulfate crystal whisker, which can be used for solving the problems that the conventional process for preparing the calcium sulfate crystal whisker by the desulfurized gypsum has the defects of lower quality of the prepared calcium sulfate crystal whisker, higher used reagent price, and higher production cost. The process for preparing the calcium sulfate crystal whisker by the desulfurized gypsum is realized by the steps of material taking, ball-milling, slurry preparation, habit modifier feeding, hydrothermal reaction, dehydration and drying. The calcium sulfate crystal whisker prepared by the desulfurized gypsum has higher quality, has diameter of 1-3 mu m and has a length-diameter ratio of 100-150. Furthermore, the diameter distribution and the length-diameter variation of the calcium sulfate crystal whisker are smaller; and the calcium sulfate crystal whisker is crystallized well on the surface. The process provided by the invention has the advantages of simple process, and convenience in control. The used habit modifier is copper chloride and has lower cost, so that the production cost is effectively reduced and the process provided by the invention is good for development of enterprises. The conversion rate of the desulfurized gypsum reaches to be more than 80%. The prepared calcium sulfate crystal whisker has lower impurity content. The invention provides a novel route with high extra value, high technology and high quality utilization for the treatment of the desulfurized gypsum.

A Synthesis of 2, 3-dichloro-pyridine, including steps as follows: 1)liquating the raw material of 3-aminopyridine in decuple-twelvefold mass thick alcaine at the condition of mixing, cooling to 4-5 deg C, adding equal mol mass hydroperoxide as raw material, controlling reaction temperature between 6-8deg Cand mixing for 1-2h at the same temperature after adding the things; 2) cooling the solution below 0deg C, adding equal mol mass erinitrit solution as raw material and then preserving heat for 0. 5-1h; 3) controlling the reaction temperature below 0deg C, adding miscible liquids of 0. 15 times mol mass copper chloride as the raw material and duple mass as thick alcaine, then preserving heat for a half hour at least; 4) Returning reactant to ambient temperature and doing extraction by dichloromethane; 5) vacuum distilling the tobacco extract to dry will get product. The intermediate products of the invention are never purified and moved, all the procedures can be done in the same reaction pot and the three step reaction only uses alcaine which contains reactant as solution.