3365results about How to "Less corrosive" patented technology

A method for producing butanol through microbial fermentation, in which the butanol product is removed by extraction into a water-immiscible extractant composition comprising a first solvent and a second solvent, is provided. The first solvent is selected from the group consisting of C₁₂ to C₂₂ fatty alcohols, C₁₂ to C₂₂ fatty acids, esters of C₁₂ to C₂₂ fatty acids, C₁₂ to C₂₂ fatty aldehydes, C₁₂ to C₂₂ fatty amides and mixtures thereof. The second solvent is selected from the group consisting of C₇ to C₁₁ alcohols, C₇ to C₁₁carboxylic acids, esters of C₇ to C₁₁ carboxylic acids, C₇ to C₁₁ aldehydes, and mixtures thereof. Also provided is a method for recovering butanol from a fermentation medium.

The present invention provides gels, solutions, films, membranes, compositions, and other materials containing polymerized and/or non-polymerized room-temperature ionic liquids (RTILs). These materials are useful in catalysis, gas separation and as antistatic agents. The RTILs are preferably imidazolium-based RTILs which are optionally substituted, such as with one or more hydroxyl groups. Optionally, the materials of the present invention are composite materials comprising both polymerized and non-polymerized RTILs. The RTIL polymer is formed from polymerized RTIL cations typically synthesized as monomers and polymerized in the presence of the non-polymerized RTIL cations to provide a solid composite material. The non-polymerized RTIL cations are not covalently bound to the cationic polymer but remain as free cations within the composite material able to associate with charged subunits of the polymer. These composite materials are useful in catalysis, gas separation, and antistatic applications.

The invention discloses a high electrical property and low corrosion flame retardant reinforcing nylon material and a preparation method thereof, aiming at solving the defects of low electrical property and high corrosion caused by red phosphorus based flame retardant added into flame retardant reinforcing nylon in the prior art. The invention adopts the technical scheme that the high electrical property and low corrosion flame retardant reinforcing nylon material disclosed by the invention has the formulation (by weight percent): (1) 40-65% of nylon 66 resin, (2) 10-20% of red phosphorus based flame retardant masterbatch, (3) 1-5% of compatilizer, (4) 3-10% of synergistic compound flame retardant system, (5) 0.5-5% of acid absorbent, (6) 0.1-0.5% of antioxidant, (7) 0.2-0.8% of lubricating agent and (8) 10-30% of glass fiber; and the reinforcing nylon material can be prepared by mixing all the components in a high-speed mixing machine for 1-2min and then putting into a twin-screw extruder for extrusion and pelleting. The flame retardant reinforcing nylon material is excellent in the electrical property, low in corrosion (extremely low in corrosion for equipment and a mould) as well as high in fluidity, heat resistance and cost performance, and is capable of meeting the requirements of electrical and electronic appliances such as a temperature controller, a contactor, a circuit breaker and the like as well as domestic appliance products.

The invention discloses a one-variable solid effervescent tablet and a preparation method for the tablet. The material system of the effervescent tablet comprises chlorite, solid acid source, free halogen source, activated Promoter, desiccant, bond, release agent, effervescent and surfactant. The preparation technique includes: after the coating processing with chlorite grains, drying and mixing well with other raw materials according to a specific proportion and technique requirements to prepare compound raw materials, and then pressing into tablets with different specification and shaping on the tablet machine to fit for application in various occasions. The effervescent tablet can quickly release chlorine dioxide and acquire pellucid water solution of chlorine dioxide while dissolving in the water, which is high in stability, rapid in dissolving rapid and strong in bactericidal ability.

Alcohols, ethers, aldehydes, and olefins are manufactured from alkanes by mixing an alkane and a halogen selected from the group including chlorine, bromine, and iodine in a reactor to form alkyl halide and hydrogen halide. The alkyl halide only or the alkyl halide and the hydrogen halide are directed into contact with metal oxide to form an alcohol and/or an ether, or an olefin and metal halide. The metal halide is oxidized to form original metal oxide and halogen, both of which are recycled.

The invention relates to the technical field of materials for synthetic leather, in particular to weak solvent aliphatic polyurethane resin for synthetic leather and a preparation method thereof. The weak solvent aliphatic polyurethane resin for synthetic leather is prepared from the following components by weight percent: 2-30 percent of aliphatic diisocyanate compound, 5-40 percent of polyester or polyether polyalcohol compound, 0-10 percent of micromolecule polyol chain extender, 0.1-13 percent of micromolecule polyamine chain extender, 0.01-1.0 percent of catalyst, 0.05-5.0 percent of assistant and 45-85 percent of organic mild solvent. The invention also discloses the preparation method of the weak solvent aliphatic polyurethane resin for synthetic leather. By adopting the technical scheme, the polyurethane resin with different solid contents, different viscosities and different modulus can by synthesized, the requirement of the synthetic leather is satisfied, and the synthetic leather product with high temperature resistance, cold resistance, anti-sticking performance and better external tensility of pigment can be prepared.

The invention relates to the technical field of soldering pastes, in particular to a halogen-free tin-bismuth-copper soldering paste and a preparation method thereof. A soldering flux of the halogen-free tin-bismuth-copper soldering paste consists of the following components in percentage by weight: 20 to 40 percent of polymerized rosin, 1 to 6 percent of rosin amine, 4 to 8 percent of thixotropic agent, 5 to 10 percent of organic acid, 5 to 10 percent of organic amine, 1 to 5 percent of antioxidant, 0.5 to 3 percent of surfactant and an organic solvent. The halogen-free tin-bismuth-copper soldering paste is mainly characterized by adopting the organic acid and the organic amine serving as activating agents and comprising no halogens at all, so not only the solderability is not reduced, but also the expansion rate and the insulation resistance value of the soldering paste are improved, and simultaneously the corrosivity of residues after soldering to a base material is reduced and the service life of the soldering paste is prolonged; and particularly, the peak temperature of the soldering paste during soldering is lower in favor of reducing the thermal damages to electronic components.

The invention relates to denitrition catalyst with a mercury removal effect. The catalyst has a chemical general formula of: MXn-V2O5-Y/TiO2, wherein, M is a metallic element selected from Fe, Cu, Mn or Co, X is halogen Cl or Br, Y is WO3 or MoO3, and n=2-4, and the elements are in a weight ratio of: 1-10 of M, 1-1.5 of V, 7.5-8.5 of W or Mo, and 75-100 of TiO2. The catalyst is prepared by the steps of: dipping V2O5-WO3/TiO2 or V2O5-MoO3/TiO2 with MCln or MBrn, then conducting frying and calcination. With the catalyst of the invention, catalytic reduction of NOx and catalytic oxidation of Hg<0> can be simultaneously completed in an original flue gas denitrition catalytic reactor, and the generated divalent mercury ions are washed and cured in desulfurized gypsum in a subsequent flue gas wet desulphurization process. Thus, cooperative control of the discharge of NOx and Hg<0> can be realized without increasing flue gas purification facilities of coal-fired power plants.

The invention discloses a cleaning agent for optical glass, which comprises the following components in weight percentage: 2-4% of long carbon chain dibasic acid; 6-10% of an anionic surfactant; 2-4% of an inorganic base; 2-6% of a nonionic surfactant; 2-4% of a special surfactant; 6-12% of a chelator; 10-20% of an organic base; and 40-70% of deionized water, wherein the long carbon chain dibasic acid is dicarboxylic acid with 21 carbon atoms, the anionic surfactant is dodecylbenzene sulfonic acid, the inorganic base is industrial NaOH, the nonionic surfactant is primary alcobol ethoxylate AEO9, the special surfactant is sodium POE nonylphenol ether sodiosulfosuccinate, the chelator is a mixture of Tetrasodium Ethylenediamine Tetraacetate and sodium gluconate, and the organic base is diethanol amine. The cleaning agent for optical glass provided by the invention has low corrosivity and good cleaning effect.

The invention provides a method to extract aluminum oxide from a fly ash, and relates to a technological method which is to extract aluminum oxide from the fly ash and comprehensively utilize the residue after extracting aluminum oxide. The invention is characterized in the method which is as follows: ammonium sulfate is mixed into the fly ash to sintering, and the solid is dissolved to obtain the solution containing aluminum-ammonium sulfate; the solution is crystallized to form solid aluminium-ammonium sulfate; solid aluminium-ammonium sulfate reacts with ammonia gas to obtain aluminium hydroxide and ammonium sulfate, and aluminium hydroxide and ammonium sulfate are washed and filtrated to obtain solid aluminium hydroxide; solid aluminium hydroxide is calcined to obtain aluminum oxide; ammonium sulfate can be circularly used after being evaporated in the liquid phase. The ammonium sulfate which is used by the method of the invention is weak acidic, the corrosiveness on the equipment is small, and the ammonium sulfate can be used circularly. The whole process is easy to industrial application. The requirement of the corrosion resistance on the equipment is low. The amount of the residue is small which is beneficial to the comprehensive utilization of the residue after extracting the aluminum oxide.

The invention discloses a halogen-free cleaning-free rosin flux, and preparation and application thereof, and particularly relates to a flux suitable for surface mount lead-free welding paste, preparation of the flux and application of the flux. The flux comprises 20-50% (mass fraction, the same below) of rosin, 5-25% of film-forming agent, 30-50% of high boiling solvent, 3-8% of activator and 2-5% of thixotropic agent, and the flux does not contain any halogen. In order to control growth of interface IMC (intermediate compound) during welding, 0.3-1% of combined inhibitor is added. The welding paste prepared with the flux and lead-free tin-silver-copper powder has the advantages of excellent printing performance, fine weldability, less post-weld residue, thin and even welding spot interface IMC and excellent mechanical property, and is capable of meeting the requirement of high-end electronic products on packaging.

The invention relates to a composite decarbonization solution for reclaiming the carbon dioxide in the exhaust gas, wherein the component and the mass percent of the composite are that: 20-60 percent of composite amines solution, wherein one or more fast reaction rate amines with a low concentration and one or more slow reaction rate amines with a high concentration are comprised; 5-10 percent of Polyxinolum; 1-5 percent of antioxidant; 1-5 percent of inhibitor; and the rest is water. The invention has the advantage of a large absorbing capability to CO2, a high degree of purification, a light causticity, a little consume of the solution and a lower recycling energy consumption. High concentration CO2 for gas injection oil-recovery can be obtained.

The invention discloses a method for synthesizing polymethoxy dimethyl ether under the atalysis of geminal dicationic ionic liquid. In the method, methanol and trioxymethylene are taken as reaction raw materials and the geminal dicationic ionic liquid is adopted as a catalyst to catalytically synthesize the polymethoxy dimethyl ether under the reaction temperature of 333 to 423K and the reaction pressure of 0.5 to 4MPa. The method has the highest reaction conversion rate of 91.5 percent, high product selectivity, and the active diesel added-component DMM308 content of 49.6 percent.

The invention relates to a process for indirectly producing alcohol with synthetic gas. The process comprises the steps that the synthetic gas formed by mixing industrial carbon monoxide with hydrogen is taken as a raw material to synthesize methanol; methanol is dehydrated to prepare dimethyl ether; dimethyl ether, carbon monoxide and hydrogen are mixed for carbonylation reaction to prepare methyl acetate; methyl acetate is purified and hydrogenated; a hydrogenated product is purified; and an alcohol product is obtained. An adopted catalyst, the process and a device have the characteristics of high conversion per pass and high effective utilization rate of reaction heat; the load of separating a crude product is reduced greatly; the production flow is shortened; and the production energy consumption is reduced greatly.

The invention discloses a power plant wastewater zero-discharge treatment technique which comprises a pretreatment process, an evaporative concentration process and an evaporative crystallization process, wherein the pretreatment process equipment comprises a precipitation and concentration tank, a sludge dewatering machine, and a raw water precipitation tank, a primary softening reactor, a secondary softening reactor and a softening precipitation tank which are sequentially connected; the evaporative concentration process equipment comprises an automatic back flush filter, a plate-type preheater, a degasser and a falling film evaporator which are sequentially communicated; and the evaporative crystallization process equipment comprises a concentrated solution tank, a crystallizing heater and a crystallizer which are sequentially communicated. The desulfurization water treatment technique is reasonable in step design and performs the pretreatment, evaporative concentration and evaporative crystallization on the desulfurization wastewater, and the end products are only distilled water and crystalline salt, thereby reducing the discharge of the harmful substances, lowering the energy consumption and implementing the goal of zero discharge of desulfurization wastewater.

A system for generating electrical energy using a naturally occurring temperature difference is disclosed. The system provides electrical energy by thermally coupling a conduit that conveys hot material from a petroleum reserve and cold deep-level water to opposing sides of a thermoelectric element. The thermoelectric element generates electrical energy based on the temperature difference between these two surfaces.

The invention relates to a green, economical and sustainable method for preparing nanocellulose fibrils. The preparation method comprises the following steps that 1, a cellulose raw material is added to a citric acid solution to be heated, stirred and hydrolyzed; 2, treated cellulose and hydrolysate are separated through methods of centrifugal sedimentation and the like, and precipitated cellulose is centrifugally washed with water multiple times and diluted into a cellulose suspension; 3, the separated hydrolysate can be directly recycled at least once, citric acid is recovered from the recycled hydrolysate, and the citric acid obtained through recovery can be recycled continuously; 4, the natural structure of the cellulose suspension obtained in the second step is further destroyed through a high pressure homogenizer or ultrasonication or physical mechanical treatment of a disc mill, and the colloidal nanocellulose fibrils are obtained. According to the method for preparing the nanocellulose fibrils, a catalyst is not adopted, the reaction condition is relatively mild, the reaction is easy to control, operation is easy, and the method is friendly to environment.

Process for the production of a hydrogen rich gas without formation of hydrocarbons comprising water gas shift conversion of a gas containing carbon monoxide and steam at a temperature of between 400° C. and 850° C. in the presence of a catalyst, which catalyst comprises one or more of the elements Mg, Mn, Al, Zr, La, Ce, Pr, and Nd, being able to form basic oxides, and mixtures thereof.

The invention discloses copper welding paste for braze welding, a preparation method of the copper welding paste for braze welding and the application of the copper welding paste for braze welding. The copper welding paste for braze welding comprises 67wt%-92wt% of brazing filler metal, 8wt%-33wt% of pasty fluid and brazing flux of which the mass is 0-5% that of the brazing filler metal, wherein the brazing filler metal comprises Cu and/or one or more types of Cu alloy, the brazing flux comprises any one or more than two components of CaF2, KF, NaF, BaF2, sebacic acid, succinic acid, lauric acid and boric acid, and the pasty fluid comprises a solvent, a thickening agent, a rheological agent, an antifoaming agent and an activating agent. When the copper welding paste prepared through the method is applied before braze welding, the copper welding paste has good thixotropy, collapse resistance and fluidity; after braze welding, a part has high joint strength, a weld joint is plump and free of residues, and the part does not need cleaning; the copper welding paste can be widely applied to welding automobile pipe fittings, copper-based heat dissipation assemblies and stainless steel parts.