686 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.

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.

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.

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 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.

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 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.

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.

Compounds having the formulae and general formulae:

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.

The present invention discloses one kind of bimetallic cyanide complex catalyst and its preparation process. The bimetallic cyanide complex catalyst contains calcium sulfate, barium sulfate, etc. in 5-50 wt% to act as carrier. Compared with traditional similar catalyst, the present invention has less consumption and simple preparation process. When it is used in synthesizing polyether, the synthesized polyether has narrow molecular weight distribution and lower unsaturation degree. The catalyst of the present invention may be used in synthesizing polyether, polyether ester, etc. and is suitable for intermittent, semi-continuous and continuous synthesis process.

The invention discloses a folium ginkgo and aloe tobacco substitute product and a preparing method thereof, and belongs to the technical field of tobacco substitute products. The fallibility of a tobacco rod is increased through complementation mixing of folium ginkgo and aloe; a cellulose and an activating agent are added in the anaerobic digestion process of the folium ginkgo and the aloe, so that the contents of phenolic acid, cyanide and anthraquinone in the folium ginkgo and aloe tobacco substitute product are effectively reduced, and the contents of effective ingredients including a flavonoid compound and terpene lactones are improved; in the preparing method, through three-stage type initial baking and rebaking in the backing process, the produced tobacco rod is bright, oily and moist; a tobacco extract is sprayed for adjusting the color and increasing the smell of tobaccos, and therefore the two main materials are evenly mixed; a moisture keeping material, a burning adjusting material, a mildew preventive, a seasoner and a perfume increasing material are sprayed, so that the offensive odors of the produced tobacco rod are fewer, thrill is small, and the fragrance is relatively pure; and through compatibility mixing of the product and traditional Chinese medicinal materials, the safety of the folium ginkgo and aloe tobacco substitute product is guaranteed, the taste is moderate, and the better medicine effect is achieved.

The invention relates to a cyanide detection instrument for detecting the content of the cyanide by flow injection colorimetry, comprising a sample pretreatment device and a developing detection device, wherein, the pretreatment device comprises a peristaltic pump, an automatic sample injector connected with the peristaltic pump, and an online heating module connected with an online distillation module, the distillation module is connected with a container containing the sodium hydroxide absorption liquid which is connected with the peristaltic pump and a six-way valve, a three-way pipe is connected with a pipeline for distilling the reagent solution, the online heating module comprises a heating rod, an aluminium body sleeved outside the heating rod, a polytetrafluoroethylene capillary tube wound on the aluminium body, and a temperature-measuring thermal resistance, one end of the polytetrafluoroethylene capillary tube is connected with the pump pipe of the peristaltic pump, and the other end is screwed into three-way pipe through a screwed joint. The instrument is applicable to the field, like environment, food, and hygiene and disease control. By using online heating and the microporous film, the online distillation of the cyanide can be realized with reduced analysis time, in addition, the instrument has simple structure, the detection is accurate, and the detection limit is low.