727 results about "Cyanide compound" patented technology

The invention discloses a method for treating coking wastewater, which relates to the method for treating wastewater and aims to solve the problems that an activated sludge method for treating the coking wastewater has the disadvantage of relatively poorer effect on the removal of organic substances and the treated water is difficult to reach the secondary discharge standard of the Integrated Wastewater Discharge Standard (GB8978-96). The method comprises that: the coking wastewater is discharged after passing through an oil separation tank, an adjusting tank, an iron carbon-Fenton oxidation pond, an up-flow anaerobic sludge bed reactor, a multifunctional hydrolyzing pond, an anaerobic tank, a composite active sludge tank and a secondary sedimentation tank, wherein the coking wastewater can also pass through a floatation tank. The coking wastewater treated by the method of the invention has a pH value of 5 to 8 and the rate of removal of Cu2+ from the coking wastewater of 69 to 85 percent, contains 300 to 450mg / L phenol and less than 15mg / L cyanide and therefore reaches the secondary discharge standard of the Integrated Wastewater Discharge Standard (GB8978-96).

A process for preparing an alkoxylate composition by the reaction of an active hydrogen containing organic compound with an alkylene oxide using a double metal cyanide complex catalyst.

A method of producing a polyoxyalkylene polymer having at least one crosslinkable silyl group and at least one hydroxyl group in each molecule which comprises treating a polyoxyalkylene polymer having at least one unsaturated group and at least one alcoholic hydroxyl group in each molecule and an impurity double metal cyanide complex as mixed therein with a metal-coordinating compound and adding a compound having a hydrogen-silicon bond and a crosslinkable silyl group in each molecule and a hydrosilylation catalyst to thereby carry out the hydrosilylation reaction.

The present invention discloses an acrylonitrile compound, a preparation method thereof, and a pest prevention and curing agent with the compound as an active constituent. The compound has structural characteristics as shown in Formula (I). In the preparation method, under the condition with alkaline, an organic solvent at the temperature between minus 10 DEG C and 150 DEG C is used for the reaction between benzofuran acyl chloride or pyrazole acyl chloride and substituted benzyl cyanide, so as to produce an intermediate, the produced intermediate reacts with acyl chloride, and the (I) can be separated. The compound can be used as an active constituent in a pest prevention and curing agent. The present invention has the advantages that the compound has excellent prevention and curing effects on harmful insects and acarus category, the activity of the compound is high, the consumption is low and the security is excellent.

Multilayered structures formed from two or more polymeric layers are fabricated to obtain a single structure preferably having advantages of each of the separate layers. Polyolefin-based substrates can provide a layer with a good balance of stiffness and impact resistance, excellent processability, and relatively lower cost. Tie layers, preferably physically positioned adjacent a polyolefin-based substrate layer, facilitates adhering additional layer(s) together with the polyolefin-based substrate. Suitable tie layers generally include a multicomponent blend of at least one vinyl cyanide-containing component and at least one styrenic block copolymer component. Preferably, the additional layers include at least one acrylate-based cap layer, which can have a glossy, scratch resistance outer layer with excellent optical characteristics.

The invention relates to a production method of a water soluble gingko powder, and belongs to the gingko processing technical field. The invention takes fresh gingko as the raw material, the gingko seeds are crushed with water after being shelled, the gingko starch and the destarch gingko solution are respectively obtained through precipitation separation, the gingko starch obtains the gingko starch hydrolyzed solution through the enzymolysis of amylase and pullulanase together, and the gingko starch hydrolyzed solution and the destarch gingko solution adopt homogenization treatment and spray drying after being mixed, so as to produce a water soluble gingko powder of the residual of non-cyanide. The water soluble gingko powder holds the gingko fragrance and the nutrition component. And thereby the invention has vital significance to the comprehensive utilization of the gingko resources.

A display device includes a light emitter comprising a set of light emitter portions, wherein at least one light emitter portion of the set is configured to emit light with an excitation wavelength, and a color conversion layer including a set of conversion layer portions. At least one conversion layer portion of the set comprises a film comprising a solid polymer composition that includes luminescent crystals of perovskite structure, which are selected from compounds of formula (I): M1aM2bXc (I), wherein M1 represents Cs, M2 represents Pb, and X independently represents anions selected from the group consisting of Cl, Br, I, cyanide, and thiocyanate. The luminescent crystals are of size between 3 nm and 3000 nm, and emit light of a wavelength in response to excitation by the light emitted by at least one corresponding light emitter portion of the set, wherein the excitation wavelength is shorter than the wavelength.

To provide a process for producing, simply and with high reproducibility, a double metal cyanide complex catalyst having an organic ligand, which has a high catalytic activity, a small particle size and a high particle size uniformity.A process for producing a double metal cyanide complex catalyst having an organic ligand, comprising (a) a step of contacting an aqueous metal halide compound solution and an aqueous transition metal cyanide compound solution in a laminar flow state to obtain a liquid containing a double metal cyanide complex, and (b) a step of mixing the liquid containing a double metal cyanide complex, and an organic ligand, to obtain a dispersion containing a double metal cyanide complex catalyst having an organic ligand.

A complexing catalyst contains two or more than two bimetallic cyanides (BMC), organic coordination agent, soluble metallic salt, polyether polyol, and organic siloxane. Its advantages are storage stability, high reaction activity, and high resistance to high reaction temp. up to 210 deg.C, and short inducing time.

Substrates having an alloy finish and methods of producing the same. The finished product according to one embodiment of the present invention is a substrate having an alloy finish comprising two or more metals, and is made by the method of the present invention. Generally, the method of the present invention comprises provision of a substrate, electroplating two or more metals onto the substrate, and then baking the plated substrate to result an alloy of the plated metals through diffusion. Substrates made according to the present invention can be covered with a variety of types of alloy finishes, and a variety of characteristics of such finishes can be achieved. The method of the present invention uses steps of electroplating and heating that are well-known in the art, and does not require the use of toxic, cyanide-based plating baths.

The present invention relates to a method for preparing a thermoplastic transparent resin, and provides a method for preparing a thermoplastic transparent resin, comprising the following steps: i) grafting a latex comprising 20-50 parts by weight of a conjugated diene rubber by emulsion polymerization , 10-50 parts by weight of an alkyl methacrylate compound or an alkyl acrylate compound, 5-25 parts by weight of an aromatic vinyl compound, and a monomer mixture of 1-10 parts by weight of a vinyl cyanide compound; ii) in During bulk polymerization, methyl methacrylate is prepared by copolymerizing 50-75 parts by weight of an alkyl methacrylate compound or an alkyl ester compound, 20-45 parts by weight of an aromatic vinyl compound, and 1-10 parts by weight of a vinyl cyanide compound. an ester-styrene-acrylonitrile (MSAN) copolymer; and iii) blending the grafted transparent resin of step i) and the MSAN copolymer of step ii. The thermoplastic resin prepared by the method of the present invention has excellent impact resistance, chemical resistance, processability, excellent moisture resistance and heat resistance, natural color, etc., and extremely excellent transparency.

Polyether alcohols having alkoxysilyl groups, the use thereof and a process for their preparation by means of DMC catalysis, characterized in that one or more epoxy-functional alkoxysilanes are added individually or in a mixture with further epoxide compounds and optionally further comonomers, either in block form or in random distribution, onto a chain starter of the formula (VII):R1—H  (VII);having at least one reactive hydroxyl group, where R1 is a saturated or unsaturated, optionally branched radical, or a polyether radical of the alkoxy-, arylalkoxy or alkylarylalkoxy group type, in which the carbon chain may be interrupted by oxygen atoms or corresponds to a polyetheralkoxy radical or to a singularly or multiply fused phenolic group.

The invention discloses a method for producing insulating bricks by utilizing aluminum-electrolyzed waste refractory materials, relating to a recovery technology of waste refractory materials during the aluminum electrolysis production, wherein the aluminum-electrolyzed waste refractory materials are mainly various refractory material mixture in which waste cathode carbon blocks and side silicon carbide are removed. The method adopts the following raw materials in percentage by weight: 5-30% of the aluminum-electrolyzed waste refractory materials, 10-50% of fly ash or fly ash drift beads, 15-30% of a cementing agent, 1-5% of additives, 3-8% of a pore-forming agent and 10-20% of water, and the method comprises the following steps of: preparing the raw materials, mixing the raw materials, extruding the mixture to mold, drying and sintering to produce the insulating bricks; and by utilizing innocuous treatment measures, the extraction contents of fluoride and cyanide of the produced insulating bricks are lower than 50mg / l and 1.0mg / l, the smoke gas is adsorbed by an aluminum oxide, and the solvable injurant and the smoke gas of the insulating bricks both meet the national environment protection emission standard; and the produced insulating bricks can be applied to the heat insulation of various pipelines and walls at a temperature lower than 1000 DEG C.

The invention relates to a non-cyanide silvering brightener and a plating solution thereof. The non-cyanide silvering brightener uses water as solvent and comprises the following main components: 10-20g / L of sodium dodecyldibenzenesulphonate, 15-30g / L of beta-naphthol ethoxylate, 0.8-2g / L of hydroxyethyl ethylenediamine triacetic acid (HEDTA), 0.5-3g / L of potassium dihydrogen phosphate, 5-15g / L of urea, 3-18g / L of polyethylene glycol, 40-80g / L of sulfur-containing heterocyclic compound and 5-15g / L of nitrogen-containing carboxylic acid. The brightener of the invention does not contain cyanide, the mirror surface of the coating is bright, the same effect of cyanide-containing silvering can be realized; the performance tests of the coating show that the color of the coating obtained by using the non-cyanide bright silvering plating solution of the invention is difficult to change, and the coating has low brittleness and good adhesive force and can meet the requirements on coating in different application aspects.

A polycarbonate resin composition and a molded article manufactured using the same. The polycarbonate resin composition includes: (A) a polycarbonate resin; (B) a vinyl cyanide compound-aromatic vinyl compound copolymer; (C) an acrylonitrile-butadiene-styrene graft copolymer including (C-1) a first acrylonitrile-butadiene-styrene graft copolymer, a rubbery polymer of which has an average particle diameter of about 200 nm to about 350 nm and (C-2) a second acrylonitrile-butadiene-styrene graft copolymer, a rubbery polymer of which has an average particle diameter of about 400 nm to about 600 nm; and (D) a compatibilizer.

The invention discloses a microbial composite treatment for gold ore tailings and an application method and belongs to the field of road engineering. According to the method, Bacillus pasteurii is compounded with one or more of Bacillus subtilis, Bacillus pumilus or Bacillus megaterium, so that by means of the Bacillus pasteurii, CaCO3 crystal is deposited and generated in the gaps in the gold oretailings, thus improving mechanical performance and stability and immobilizing heavy metal and noble metal ions in the gold ore tailings. The Bacillus pumilus or Bacillus megaterium can decompose thecyanides in the gold ore tailings. Through mechanical ploughing and multi-round slurry injection, the microorganisms, the gold ore tailings and a cemented liquid are fully mixed and contacted with each other, so that purposes of generating the CaCO3 crystal for reinforcing the gold ore tailings and degrading the cyanides can be achieved. The method has no secondary pollution, is low-cost, is simple and is high in resource utilization rate, and can achieve multi-channel large-scale recovery utilization of the tailings.

The invention relates to a method and system for converting sodium-containing and fluorine-containing compounds in a waste cathode carbon block of an aluminum electrolytic cell. The conversion methodcomprises the step that a conversion agent is used for converting the sodium-containing compound in the waste cathode carbon block of the aluminum electrolytic cell into a fluorine-free soluble sodiumcompound, converting the fluorine-containing compound into an insoluble and harmless mineral fluorine compound and converting a cyanide-containing compound into harmless N2 or NH3 and CO2 in an oxidized manner through a mechanochemical conversion reaction in a conversion mill, and therefore the hazards of fluoride and cyanide in the waste cathode carbon block of the aluminum electrolytic cell arecompletely eliminated. The conversion system comprises a waste cathode carbon block crushing device, a milling device, the conversion mill, a stirred reactor and a solid-liquid separation device which are sequentially connected in series, and the solid-liquid separation device is then directly connected with a concentration or crystallization device and a drying or heat treatment device, and thedrying or heat treatment device is connected to the crushing device. By means of the method and system, the process is simple, mass production is easy, the production cost is low, pollution of three wastes is avoided, and the method and system are environmentally friendly.

It is to provide a flexible polyurethane foam having favorable vibration characteristics and further having excellent sound absorption characteristics, a process for its production and a seat for an automobile. A process for producing a flexible polyurethane foam, which comprises reacting a polyol compound with a polyisocyanate compound in the presence of a foam stabilizers a blowing agent and a urethane-forming catalyst, wherein as the polyol compound, a polyol compound containing a polyoxyalkylene polyol (A) having an oxyalkylene group obtained by ring opening addition polymerization of an alkylene oxide by using a composite metal cyanide complex catalyst and having an unsaturation value less than 0.04 meq / g, a polyoxyalkylene polyol (B) obtained by random ring opening addition polymerization of ethylene oxide and an alkylene oxide having at least 3 carbon atoms to an initiator, and a polymer-dispersed polyol (C), is used.

The invention provides a brewing method for cherry rum and the acquired cherry rum. The brewing method comprises the following steps: collecting the cherry with the sugar content above 110g / L and quickly reducing temperature to 10-15 DEG C; de-nucleating at low temperature and performing low-temperature airbag squeezing; clarifying the juice for 24 hours at 7-8 DEG C, and then recovering the temperature to 12-14 DEG C, starting fermentation, controlling the fermentation temperature at 16-20 DEG C, and reducing the temperature to 10 DEG C and sealing after ending the fermentation, thereby acquiring a juice fermented wine; dipping the cherry distilled liquor, with the degree reduced to 28% in the previous year before the fruit residues are used, for 20 days under the controlled temperature at 20-22 DEG C, separating and clarifying, thereby acquiring the dipping wine with the alcoholic strength at 23-24%; blending the juice fermented wine with the dipping wine, causing the alcoholic strength to be about 13%, and filling the blended wine after the stability test and the clarifying treatment, thereby acquiring the cherry rum. According to the brewing method provided by the invention, the pectinase and the white spirit are not used and no external sugar is added, so that the quality of the wine is ensured, the acquired cherry rum is elegant in fragrance, the contents of methyl alcohol, fusel and cyanide are low and the cherry rum is high-quality and healthy.

The invention relates to a preparation method of three-dimensional nano porous tin-base alloy for a lithium-ion battery negative electrode. Within the temperature range between 0 and 100 DEG C, a transitional metal cyanide aqueous solution in given concentration is mixed and reacted with a stannic chloride aqueous solution in given concentration to form a tin-base cyanogen gel system according to certain molar ratio. The tin-base cyanogen gel system is used as a precursor, a reducing agent in identical volume or excessive volume is added into the precursor to stand for 0.1 to 20 hours, the tin-base cyanogen gel is adequately reacted with the reducing agent, and a product is washed and dried under the protection of vacuum or inert gas to obtain the three-dimensional nano porous tin-base alloy. The three-dimensional nano porous tin-base alloy prepared by adopting the tin-base cyanogen gel system as the precursor is used as the lithium-ion battery negative electrode material, the tin-base alloy has a three-dimensional nano porous structure, and when being used as the lithium-ion battery negative electrode material, the tin-base alloy has good cycling performance, high specific capacity and multiplying power performance. The preparation method is simple and environment-friendly, and the mass production can be realized.

A thermoplastic acrylonitrile-butadiene-styrene (ABS) resin composition of the present invention comprises (a) a bimodal graft copolymer of a conjugated diene rubbery polymer whose average particle diameter of 800 to 1,500 Å and a conjugated diene rubbery polymer whose average particle diameter of 2,500 to 3,500 Å, the conjugated diene rubbery polymers being grafted with an aromatic vinyl compound and a vinyl cyanide compound, (b) an acrylic resin of a methacrylic or acrylic acid alkyl ester compound, an aromatic vinyl compound and a vinyl cyanide compound, (c) a copolymer of an aromatic vinyl compound and a vinyl cyanide compound, and (d) polysiloxane masterbatches. The ABS resin composition has excellent colorability and releasability while maintaining the inherent physical properties (e.g., impact strength and tensile strength) of the base resin.

The invention relates to a large-scale preparation method of high stability caesium removing adsorbent, a product of the preparation method and application of the product, in particular to transitionmetal-stabilized ferrocyanide adsorbent supported by particulate inorganic oxide or activated carbon. The transition metal-stabilized ferrocyanide adsorbent comprises a particulate inorganic oxide carrier or a particulate activated carbon carrier, a transition metal-stabilized ferrocyanide layer which coats the inorganic oxide carrier or activated carbon carrier and a polymer material layer coating the transition metal-stabilized ferrocyanide layer. The adsorbent has high crushing strength and a low ion leaching rate. The invention also relates to the preparation method of the adsorbent and the application of the adsorbent in removal of radioisotope Cs ions, stable-isotope Cs ions, radioisotope Rb ions and stable-isotopic Rb ions.

The copolymer latex for non-contact coating of the present invention is obtained by emulsion polymerization of a monomer containing from 23 to 58% by mass of an aliphatic conjugated diene monomer, from 0.1 to 7% by mass of an ethylenic unsaturated carboxylic acid monomer, from 5 to 40% by mass of a vinyl cyanide compound, and from 0 to 71.9% by mass of other monomer capable of being copolymerized with the other monomers (provided that the total amount of the monomers is 100% by mass), and polymer particles contained in the latex have an average particle diameter of from 50 to 150 nm. A coating composition for paper containing the latex, a pigment and the like is suitable for a non-contact coating method, such as a curtain coater and a spray, to obtain coated paper excellent in surface strength, printing gloss and the like with good runnability.

The invention relates to alkoxysilyl-functional polyethersiloxanes and to a method for the production thereof by a noble-metal-catalyzed SiC bonding of hydrosiloxanes comprising SiH groups with unsaturated polyethers carrying alkoxysilyl groups or by alkoxylating polyethersiloxanes or polysiloxanes with epoxy-functional alkoxysilanes in the presence of double metal cyanide catalysts.

The invention is directed to a double-metal cyanide catalyst for the preparation of a polyether polyol by the polyaddition of an alkylene oxideon to a starter compound containing active hydrogen atoms, wherein the DMC catalyst comprises a) at least one double-metal cyanide compound; b) at least one organic complexing ligand; and c) two different complexing components.

A two stage alkoxlyation process for preparing a short-chain polyether polyol from a starter compound comprising from 3 to 9 hydroxyl groups and at least one alkylene oxide, wherein said starter compound has a hydroxyl equivalent weight of from 22 to 90 Da. Said process comprises a first stage alkoxlyation using a superacid catalyst to prepare an oligomeric alkoxylated starter compound that is further alkoxylated to the short-chain polyether polyol of the invention in a second stage using a DMC catalyst. The process of the present invention may be performed continuously, in a batch, or semi-batch process.

The present invention provides an improved process for the preparation of a compound of formula (I), which comprises the steps of: formula (I), (a) reacting isovaleraldehyde of formula (II) and alkyl cyanoacetate of formula (III) optionally in presence of salts of weak acid and weak base or weak base in a suitable solvent to get 2-cyano-5-methyl-hex-2-enoic acid alkyl ester of formula (IV); (b) reacting 2-cyano-5-methyl-hex-2-enoic acid alkyl ester of formula (IV) with a suitable cyanide source in water or in an organic solvent or mixture thereof to get 2-isobutylsuccinonitrile of formula (V); (c) obtaining optionally 2-isobutylsuccinonitrile of formula (V) by reacting isovaleraldehyde of formula (II) and alkyl cyanoacetate of formula (III) in presence of suitable cyanide source in water or in an organic solvent or mixture thereof in single step; (d) converting 2-isobutylsuccinonitrile of formula pa (V) to racemic 3-cyano-5-methyl-hexanoic acid or salt thereof of formula (VI) with a genetically modified nitrilase enzyme (Nit pt 9N_56_2) in water or optionally with an organic co-solvent at appropriate pH and temperature; (e) converting racemic 3-cyano-5-methyl-hexanoic acid or salt thereof of formula (VI) to racemic alkyl 3-cyano-5-methyl-hexanoate of formula (VII) by treatment with alcohol (R3OH) and acidic catalyst or alkyl halide (R3X) in presence of a base in a suitable solvent or a mixture of solvents thereof; (f) obtaining (S)-alkyl 3-cyano-5-methyl-hexanoate of formula (VIII) and (R)-3-cyano-5-methyl-hexanoic acid or salt thereof of formula (X) by enzymatic enantioselective hydrolysis in water or organic solvent or a mixture thereof from racemic alkyl 3-cyano-5-methyl-hexanoate of formula (VII); (g) obtaining optionally the compound of formula (VII) by racemizing unwanted (R)-3-cyano-5-methyl-hexanoic acid or salt thereof of formula (X) or substantially enriched (R)-3-cyano-5-methyl-hexanoic acid salt thereof of formula (X) in presence of a base in organic solvent or a mixture thereof; (h) converting (S)-alkyl 3-cyano-5-methyl-hexanoate of formula (VIII) to pregabalin of formula (I) by hydrolyzing ester group with suitable alkali or alkaline earth metal base followed by hydrogenation optionally in one pot in a solvent selected from water or other organic solvents or a mixture thereof in presence of a suitable hydrogenation catalyst.

Compounds having the formulae and general formulae:wherein each R1, R2, R3 and R4 are the same or different and may be hydrogen, an alkyl group, an aryl group, a halogen, a nitro group, an alkyl or aryl ester, and an alkyl or aryl ether;compounds having the general formula:wherein R is an alkyl, aryl or electron withdrawing group;mixtures thereof; can be used as additives for crude oil and hydrocarbons. These compounds may be used to scavenge mercaptans, sulfides, cyanides, and primary or secondary amines; either alone or in combination.

The invention discloses a coking wastewater purifying agent as well as a preparation method and an application thereof and belongs to the technical field of environmental protection. The purifying agent consists of a coagulant, a coagulant aid and an accelerant, wherein the coagulant consists of an iron salt, an aluminum salt, a magnesium salt and a zinc salt; the coagulant aid consists of PAM (polyacrylamide) and bentonite; and the accelerant consists of zeolite powder and chitosan. The purifying agent is powdery, is convenient to use, and is simple in preparation process and low in cost. The purifying agent is applied to treatment of coking wastewater to effectively reduce COD (chemical oxygen demand) and the concentrations of ammonia nitrogen, chroma, volatile phenol and cyanide in the coking wastewater, and the quality of produced water is stable.