35results about How to "Reduce the amount of hydrogen" patented technology

The invention relates to a single crystal silicon chip pre-cleaning solution and a cleaning method thereof. It is characterized in that it consists of the following components: the pre-cleaning liquid is composed of hydrogen peroxide, sodium hydroxide or potassium hydroxide and water. It is characterized in that it consists of the following components: hydrogen peroxide, sodium hydroxide or potassium hydroxide, and water. A cleaning method using a single crystal silicon wafer pre-cleaning solution according to claim 1, characterized in that: putting the silicon wafer inserted into the flower basket into the uniformly mixed single crystal silicon wafer pre-cleaning solution at a temperature of 55 At ~80°C, use ultrasonic cleaning for 60-600 seconds. After ultrasonic cleaning, rinse with deionized water for 1 minute at 60°C. After rinsing with deionized water, take out the silicon wafer and dry it. The invention has the advantages that after using the hydrogen peroxide process, the concentration of alkali is reduced, the amount of hydrogen generated is small, and no bubble marks will be produced on the surface of the silicon wafer, and there will be no drifting and no obvious boundaries. Since the concentration of the alkali is reduced, the amount of thinning is also effectively reduced, which is beneficial to reduce the fragmentation rate of the battery sheet in the subsequent process.

The invention is mainly applied to the technical field of furnace pipe heating, and in particular, relates to a cracking furnace pipe in-situ coating treatment heat treatment furnace. The cracking furnace pipe in-situ coating treatment heat treatment furnace comprises a bottom frame, wall plates and a top cover plate to form a furnace cavity; portal frames are distributed in the furnace cavity; the portal frames are mounted on the bottom frame; two layers of cross beams are arranged on the portal frames; bottom electric heating chips are arranged between the adjacent portal frames, and are fixed on the bottom frame; the periphery of the bottom frame is the wall plates; the top cover plate is arranged at the tops of the wall plates; the wall plates on the front and back two sides and the top cover plate are provided with fire observing holes; staff access ports and process pipe outlets are respectively formed in the wall plates at the left and right two ends; and thermocouples, electric wire sleeves and side electric heating chips are respectively arranged on the inner sides of the wall plates on the front and back two sides. The cracking furnace pipe in-situ coating treatment heat treatment furnace can be used for heat treatment of pressure containers, can perform the heat treatment for equipment with different lengths and specifications through such forms as adding of separation plates and heightening, and can achieve multiple purposes.

The invention discloses a high-performance uniformity aluminium alloy ingot and a production method thereof. The high-performance uniformity aluminium alloy ingot comprises the following components in percentage by weight: 2.1-3.8 percent of Cu, 7.6-9.3 percent of Si, 0-0.28 percent of Mg, 0-0.9 percent of Zn, 0-0.8 percent of Fe, 0-0.48 percent of Mn, 0-0.48 percent of Ni, 0-0.1 percent of Ti, 0-0.1 percent of Pb, 0-0.1 percent of Sn, 0-0.25 percent of other trace element sum and the balance of AL. The invention also provides the production method of the high-performance uniformity aluminium alloy ingot. The high-performance uniformity aluminium alloy ingot has even alloying components, effectively controls the problem of component segregation and has good mechanical property and good processing property. The production method of the high-performance uniformity aluminium alloy ingot can effectively remove nonmetal materials in waste aluminium materials and reduces slag generated in as melting process.

The invention discloses a cracked gas compression interstage selective hydrogenation method, belonging to the selective hydrogenation technical field. Aiming at reducing energy consumption and cocking of separation and hydrogenation flows in ethylene unit while reducing energy consumption and coking of cracked gas compressing machine stage and improving application universality and easy operation of the method, mixed phase hydrogenation reaction is carried out between stages of cracked gas compression machine, compressed condensate is taken as liquid phase material flow, hydrogenation is carried out under the presence of catalyst to reduce alkyne and dialkene content in cracked gas, and the material after hydrogenation is cooled and fed into the suction tank at a fourth compression stage. The method of the invention reduces high unsaturated hydrocarbon while consuming part of hydrogen, thus not only reducing energy consumption and coking amount of separation and hydrogenation flows but also reducing coking and energy consumption of compression stage. The method of the invention has wide application and can be used in various cracking separating flows.

The invention discloses high-purity stabilized aluminum alloy ingot which comprises the following components in weight percent: 3.1-3.8% of Cu, 7.9-9.3% of Si, 0-0.1% of Mg, 0-2.3% of Zn, 0-0.9% of Fe, 0-0.5% of Mn, 0-0.5% of Ni, 0-0.35% of Sn, 0-0.1% of Ti, 0-0.25% of other trace elements and the balance of AL. The invention further discloses a production method of the high-purity stabilized aluminum alloy ingot. The high-purity stabilized aluminum alloy ingot of the invention has low gas and slag content, high cleanness of molten aluminum, uniform components of the product and thin crystal structure; and the production method has low production cost and high efficiency, and effectively solves the pollution problem of the secondary aluminum industry.

The invention discloses a degassing process for a low-gas-content centrifugal composite roll. In the process, cone through holes (3) for installing stopper blocks (8) are processed in mounting holes of metal mold hanging handles at both sides of a roll body metal mold (2); after centrifugal casting is completed, the low-gas-content centrifugal composite roll is closed with upper and lower roll necks and casting of a roll heart is completed, the stopper blocks (8) in the cone through holes (3) at both sides of the roll body metal mold (2) are taken out; gas suction joints (10) are arranged; a gas suction pipe of a vacuum pump is connected; the vacuum pump is started to carry out vacuum degassing; and after a casting is cooled, vacuum degassing is stopped, so that most of gas on a working layer of the centrifugal composite roll is removed. According to the invention, gas content of the working layer of the centrifugal composite roll is greatly reduced; mechanical performance of the working layer of the roll is obviously improved; and particularly, plasticity, toughness and contact fatigue resistance of the centrifugal composite roll are improved, so that service life of the centrifugal composite roll, particularly a cold roll, is greatly prolonged.