46results about How to "Strong resistance to impurities" patented technology

The invention relates to a selective hydrogenation method of high unsaturated hydrocarbons in C4 fractions, which is characterized in that salvage stores which are rich in acetylene hydrocarbon and prepared by extracting butadiene are used as the material, and a fixed bed reactor is adopted to obtain 1, 3-budiene by selective hydrogenation under the existence of a catalyst. The adopted process conditions are as follows: the reaction temperature is between 30 DEG C and 90 DEG C, the reaction pressure is between 1.0 MPa and 4.0 MPa and the liquid space velocity is 7 to 20h<-1>. The catalyst is preferably a palladium system catalyst with alumina as a carrier, the specific surface is 50 to 150m<2>/g and the specific pore volume is 0.25 to 1.0ml/g. The method has remarkable good effects on reducing waste of resources and improving economic benefits by effectively utilizing the salvage stores rich in acetylene hydrocarbon and prepared by extracting butadiene.

An alkaline non-cyanide plating solution for copper-plating used on iron and steel base and a preparation method thereof relate to a kind of plating solution. The invention provides the alkaline non-cyanide plating solution for copper-plating used on iron and steel base and the preparation method thereof. The plating solution comprises the following components: main salt, complexing agent, conductive salt, activator, cuprous ion complexing agent, pH stabilizer and brightening agent. The method comprises the following steps: adding complexing agent in water, stirring to dissolve complexing agent, obtaining a solution A; adding main salt in the solution A, stirring to dissolve main salt, obtaining a solution B; adding conductive salt in water, stirring to dissolve conductive salt, obtaininga solution C; mixing the solution B and solution C, adjusting the pH value to 2.0-4.5 with sulfuric acid or sodium hydroxide, obtaining a solution D; adding additive in the solution D, adding water toperform constant volume process and obtaining the alkaline non-cyanide plating solution for copper-plating in the desired volume for use, wherein the additive is activator, cuprous ion complexing agent, pH stabilizer and brightening agent.

The invention provides a selectivity hydrogenation method for diolefin of full-fraction pyrolysis gasoline, which comprises reduction and passivation of catalyst and application of technological conditions. The catalyst is nickel series hydrogenation catalyst which is used after being reduced or being subjected to reduction and passivation. The selectivity hydrogenation method is characterized in that the hydrogenation technological conditions are as follows: the volume space velocity of a liquid is less than or equal to 4h<-1>, the inlet temperature of a reactor is between 40 and 130 DEG C, the reaction pressure is more than or equal to 2 MPa, and the hydrogen/oil ratio is between 100 and 500 (v/v); the nickel series catalyst takes alumina as a carrier, is prepared by the immersion method, and contains 14 to 20 percent of nickel oxide, 1 to 8 percent of lanthanum oxide and/or cerium oxide, 1 to 8 percent of 4B oxide auxiliary agent, 2 to 8 percent of silicon dioxide and 1 to 8 percent of alkaline earth oxide as calculated by 100 weight percent of the catalyst; and the specific surface of the catalyst is between 60 and 150 square meters per gram, and the pore volume of the catalyst is between 0.4 and 0.6 milliliter per gram. The invention also provides a method for performing reduction and passivation on the catalyst on a hydrogenation unit. Under the conditions of the application method and the technological conditions, the nickel catalyst has good hydrogenation performance, and particularly has strong impurity and colloid resistance and good hydrogenation stability.

The invention relates to chemical-copper plating liquid and a copper plating production process, which are used for copper plating of tubular steel and iron pieces and non-metal pieces, and are characterized in that: the chemical-copper plating liquid consisting of copper sulphate, a retarder, a complexant, a reductant and deionized water is used to pretreat a workpiece and then the workpiece is subjected to chemical-copper plating; an anode is 0.3 percent phosphor-containing copper plate; the area ratio of the anode and the cathode is 2:1; the current intensity in the cathode is 0.5 to 4A/dm<2>; the pH value of the copper plating liquid is 1.0 to 3.0; the temperature of the copper plating liquid is normal temperature; and the carrying capacity is 1 to 4dm<2>/kg; the copper plating time is8 to 10 minutes. The liquid and the process have the advantages of firm bonding between cladding and a substrate, stable process, high impurity resistance, long service life, crystalline simple copper cladding, fine cladding crystallization, low porosity, high anticorrosion performance, simple operation, convenient maintenance, no formaldehyde, no damages to human bodies and environment and environmentally-friendly product.

The invention relates to an intelligent swing type target flow meter, belonging to the field of liquid measuring devices. The intelligent swing type target flow meter is characterized in that a valve body (2) is provided with a detection hole (6), a target plate (2) is arranged at the detection hole and is hinged with the sidewall of the detection hole through an angle sensor (3) so as to form a swing type target structure, the target plate is adapted with a channel (7) in area, the flow variation of a measuring tube is converted into the swing angle variation of the swing type target, then the switch angle is converted into the angle variation of a magnetic line, and an intelligent transducer (5) is arranged and connected at the output end of the angle sensor (3). The target plate is stressed and rotated on a hinge point by a certain angle, the angle sensor sends out an electric signal and inputs the signal into the intelligent transducer, and the intelligent transducer processes the electric signal into a flow signal for display or output, thereby measuring the fluid flow. The intelligent swing type target flow meter has the characteristics of high sensitivity, high adaptive ability, better measuring effect of the flow of the liquid affected by high viscosity, gas and sand content and the like and is especially suitable for measuring the integrated flow of transmission media in a multiphase pipeline.

The invention provides a low-concentration nickel-plating surface treatment method for a permanent magnet material. The surface treatment method comprises the following steps of: (1) chamfering and polishing: normally polishing a neodymium-iron-boron permanent magnet material by using a mechanical vibration grinding and barreling chamfering method; (2) degreasing and removing oil: adding sodium phosphate, sodium carbonate or sodium hydroxide for normally degreasing and removing oil; (3) removing rust by acid-washing: adding a nitric acid solution to carry out normal acid-washing rust removal; and (4) plating with low-concentration plating nickel liquid so as to form a nickel layer. The method provided by the invention has the advantages of nickel-saving and power-saving function, good bonding force of the plating layer, strong anti-impurity capability, good displacement, low pore pressure and capability of effectively reducing the cost caused by waste water treatment.

The invention discloses an alkaline chloride zinking primer, wherein the primer comprises following components based on mass percent: 9.6% to 14.5% sodium hydroxide, 5.0% to 7.0% potassium chloride, 0.6% to 0.9% zinc oxide, 0.35% to 0.45% DPE-3 adjuvant, 0.35% to 0.45% ZB-80 lustre-coating agent and 76% to 84% water. The preparation method of the alkaline chloride zinking primer is provided. The invention has advantages that the plating layer has high combination ratio, high depositing speed, bright and fined plated products without brittleness, coarse skin and color change when baking temperature is at 250 deg. C, great anti-impurity capacity, without fogging and bubbling phenomena. The salt spray test uses 150 hours to 200 hours with low cost. The invention saves energy and is easy to processes waste.

The invention discloses a single tin salt electrolytic coloring additive. The single tin salt electrolytic coloring additive comprises a complexing agent, a buffer agent, an antioxidant and a surfactant, wherein the antioxidant comprises ferrous sulfate; the single tin salt electrolytic coloring additive also comprises an auxiliary agent containing ferrous sulfate; the auxiliary agent comprises modified amino amide zinc phosphate. The single tin salt electrolytic coloring additive disclosed by the invention has good comprehensive performances, solves the problem that nickel must take part in the reaction in an electrolytic coloring process, and is stable in groove liquid and quick and uniform to color, and the cost can be lowered effectively. Moreover, the single tin salt electrolytic coloring additive is low-carbon, energy-saving and green and environment-friendly, and process and product quality consistent to those of a double salt system can be obtained.

The invention discloses an acidic chloride zinc-plating additive and a preparation method thereof. The additive consists of a brightening agent A and a softening agent B, wherein the brightening agent A is prepared by dissolving 20 to 30 weight parts of benzalacetone into 100 weight parts of alkylphenol ethoxylates with stirring at room temperature under normal pressure at the rotate speed of between 10 and 100 revolutions/minute, and the softening agent B is prepared by dissolving 1.8 to 5.8 weight parts of nicotinic acid 100 weight parts of dodecanol polyoxyethylene ether with stirring at the room temperature under the normal pressure at the rotate speed of between 10 and 100 revolutions/minute. The additive is prepared from 0.6 to 1.6 grams/liter of brightening agent A, 10 to 30 grams/liter of softening agent B and a proper amount of water. The additive is added into acidic zinc-plating solution, so that a zinc coating which is high in brightness and flattening, small in internal force and high in current efficiency can be obtained.

The invention relates to a non-cyanide converting method for cyanide plated zinc. Non-cyanide conversion is as follows: a brightening agent (HT) and a complexing agent (HEDP) are added into plating liquid to carry out zinc plating by stopping adding NaCN and ZnO into the plating liquid. The plating liquid comprises the following components (g*L-1): 10-less than 5 of cyanide, 8-15 of zinc oxide, 60-120 of NaOH, 15-20 of HEDP and 2-3 of HT. The electroplating technical condition comprises the temperature of 10-45 DEG C, the cathode current density (A*dm<-2>) of 0.5-4 and the average current efficiency of 70-78 percent. The corrosion resistance, the bonding capability and the color change resistance of a plating layer completely meet the practical production requirement. The plating liquid has high impurity resistance and is still stable for continuously using for one month. The converted process does not use the cyanide, is easy to process electroplating wastewater and is a more clean production process, thereby replacing a cyanide zinc plating process in a peace way.

The invention provides an additive capable of preventing copper replacement in cyanide-free alkaline coppering solution and a preparation method thereof, and belongs to the field of electrofacing. The additive capable of preventing copper replacement in cyanide-free alkaline coppering solution, provided by the invention, is cucurbituril (CB) n for short. The addictive with required concentration is prepared through the following method: pouring 500 to 600 ml distilled water or deionized water into a 1000 ml container, adding 20 to 30g KOH, weighing and adding 1g hot cucurbituril into the solution when all KOH dissolves; and when the cucurbituril dissolves completely, refilling distilled water or deionized water to 1000 ml and stirring the solution well. The additive can solve the problem that the binding force between the copper plate and the base body is bad as the copper is replaced and separated out, and enables the binding force between the plated copper plate and the base body to be strong.

The invention belongs to an edible mushroom cultivation technique, in particular relates to an agaric cultivation method. 'Daer No.1' is a new agaric species with strong resistance, which is separated, tamed and bred from wild species resources in southwest China. However, the cultivation techniques of this new species are still uncertain. The technical scheme of the agaric cultivation method is that the production process of a fungus bag is that, by weight, 150-160 parts of hard tree sawdust such as cyclobalanopsis glauca and the like, 20-30 parts of bran, 6-10 parts of corn flour, 3-5 partsof gypsum, 4-7 parts of lime, 1-2 parts of potassium dihydrogen phosphate, 1-2 parts of magnesium sulphate and 300-350 parts of water, the materials above are mixed well into a culture material; and the mixed well materials are bagged and sterilized. In addition, the conditions for preparing fungus, cultivating fungus, puncturing, constructing an agaric cultivation site and the processes of fungusbag lining, agaric growing, and agaric collecting can be optimized. The agaric cultivation method is applicable to cultivating agaric of 'Daer No.1'.

The invention discloses a Hypsizygus marmoreus culture material and method, relates to the technical field of Hypsizygus marmoreus culture, and solves the problems that Hypsizygus marmoreus culture time is long and biotransformation rate is low in the prior art. The Hypsizygus marmoreus culture material mainly comprises, by mass, 45-52 parts of cottonseed hull, 20-25 parts of corn cob, 2-10 partsof sawdust, 3-5 parts of bean pulp, 12-15 parts of corn flour, 8-10 parts of wheat middling and 3-5 parts of bran. The Hypsizygus marmoreus culture material and method has the advantages that Hypsizygus marmoreus culture time is lowered to below 95 days, fruiting growth time is lowered to about 25 days, the cultivation cycle of Hypsizygus marmoreus is shortened greatly, the biotransformation ratereaches 130-149%, yield is further increased, and excellent economic benefits are generated.

The present invention relates to a nickel-based catalyst. The catalyst is prepared by loading metallic nickel active components on a composite carrier which consists of an aluminum oxide-titanium oxide complex and ZSM-5, wherein in the catalyst, a weight ratio of aluminum oxide and titanium oxide is 4:1; a content of nickel oxide is 12%-20% by weight; the aluminum oxide-titanium oxide takes 30%-70% of the entire composite carrier by weight, the ZSM-5 takes 30%-70% of the entire composite carrier by weight; the surface area of the catalyst is 90-260 m 2/g; and the pore volume is 0.5-1.5 ml/g. The catalyst has characteristics of good low-temperature hydrogenation activity, strong anti-impurity ability and sol ability, a long regeneration cycle, and good stability. Applying the catalyst to a process in which diene is converted to monoolefins through selective hydrogenation can maintain a good hydrogenation effect.

The invention relates to a hydrofining method of pyrolysis gasoline. The method comprises the steps of: under the existence condition of a nickel catalyst of which active components are more uniform to disperse, performing a catalytic hydrogenation reaction on raw materials of the pyrolysis gasoline, and controlling reaction conditions in a reaction process to perform hydrofining of the pyrolysis gasoline so as to obtain downstream refined raw materials with a lower diene value and a lower bromine value. The nickel catalyst used by the hydrofining method disclosed by the invention has the characteristics of high low-temperature hydrogenation activity, high diene selectivity, high capability of resisting impurities and sol, long regeneration cycle and good stability. Under technological conditions of the hydrofining method disclosed by the invention, the catalyst is used for performing a hydrogenation reaction, controlling operating conditions is facilitated, and a favorable hydrofining effect of the pyrolysis gasoline can be guaranteed.