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

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 inthat 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 percento f 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 catalystisbetween 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 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 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 is 8 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 discloses an automatic plane seal compensation valve. A valve element assembly moves left and right in a valve body, and the valve body limits internal rotation of the valve element assembly in the valve body. The contours of the matching surfaces of the valve body and the valve element assembly are the same and are shaped like a n-side polygon, and the n-side polygon can meet the following conditions that 1, each side is a straight line; and 2, a plurality of sides in all the sides are straight lines, and the rest of sides are curves. A space for containing the valve element assembly is formed among a left end cover, a right end cover and the valve body, a left valve plate is connected between a left piston and a middle partition plate, a right valve plate is connected between a right piston and the middle partition plate, the middle partition plate is connected between the left valve plate and the right valve plate, and the left valve plate and the right valve plate aredistributed in a crossed manner. According to the automatic plane seal compensation valve, the defect that in the prior art, leakage cannot be compensated after wear occurs is overcome, and meanwhilethe technical prejudice of technicians in the field is also overcome. When the valve element assembly is worn, automatic compensation can be achieved, low leakage is achieved, and the automatic planeseal compensation valve is simple in structure and high in impurity-resistant capacity.

The invention discloses an electric four-way valve, which includes a cylinder body (3), an isolation cover (1) and a lower end cover (2), and four connecting pipes (15) are arranged on the lower side wall, and The spool (8) is characterized in that the outer surface of the spool (8) has pits or holes or grooves or reticular lines, and the spool (8) is provided with upper and lower retaining covers (6, 7); ) is equipped with a power support plate (5) in the middle, and the drive assembly (4) is installed on the power support plate (5), and the electric drive unit (16) is installed on the drive assembly (4); The output shaft of the assembly (4) is connected; the sensor plate (9) is set on the lower output shaft of the spool (8), and the magnetic block (10) is set on the sensor plate (9); the sensor is installed in the blind hole of the lower end cover (2) (11); a junction box (14) is provided on the outer wall of the cylinder (3), and the electric drive unit (16) coil lead wire and the sensor (11) lead wire are introduced into the junction box (14); its structure has good airtight performance and is easy to maintain Convenient, strong anti-impurity ability.

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 discloses an electroplating solution and method for electrically depositing invar alloy in a ferric iron system alkaline solution, belongs to the field of alloy electro-deposition and relates to an electroplating process of invar alloy electro-deposition. Electroplating solution composition and electroplating process parameters are involved in the method. The invar alloy belongs to iron-based high-nickel alloy and generally contains 32-36 wt% (mass fraction) of nickel. An alkaline solution system containing ferric iron salt and a mixed complexing agent is adopted and combined with a specific electroplating process condition, so that the invar alloy with the specific nickel content range is obtained in an electroplating manner. The electroplating solution comprises ferric iron salt, nickel salt, a mixed complexing agent, a buffering agent, an addition agent and a wetting agent. According to the electroplating process parameters, temperature ranges from 40 DEG C to 65 DEG C, a pH value ranges from 8.5 to 11.5, current density ranges from 1.0 A / dm<2> to 12.0 A / dm<2>, and air stirring or mechanical stirring is adopted as a stirring manner. An invar alloy coating with the uniform thickness being 0.1-10 micrometers and the nickel content being 34-36% can be obtained in an electroplating manner, and appearance is smooth and glossy.