31results about How to "Avoid chemical damage" patented technology

A kind of preparation method of helical columnar polypyrrole, its practice mainly is: the molar concentration of A, preparation sodium indigo disulfonate is the hydrosol of 0.0025-0.0075mol / L; B, get hydrosol 180ml, then add 1.38ml pyrrole, in 0-7 DEG C of magnetic stirring under ice bath conditions for 15-25min to obtain a reaction mixture; C, preparation of FeCl Molar concentration is 0.03-0.15mol / L initiator solution; D, 20ml of initiator solution is added dropwise in the reaction mixture, Under the condition of 0-7°C in an ice bath, magnetically stirred and reacted for 4.5-9 hours, and the solid was obtained by suction filtration; E, washed and dried, and obtained. The helical columnar polypyrrole prepared by the method has a diameter of micrometer to nanometer order, has better magnetic loss effect and nanometer loss effect on electromagnetic waves, and has simple preparation process, low manufacturing cost and stable product performance.

The invention discloses a hot molten slag maintaining furnace for producing mineral wool. The hot molten slag maintaining furnace comprises 1, a cylindrical shell, wherein the cylindrical shell is a cylindrical body which is hollow and has an open top, the periphery wall of the cylindrical body is provided with a water sleeve, an upper part of the cylindrical body is provided with a slag inlet, a lower part of the cylindrical body is provided with a slag outlet and an iron outlet, and the slag outlet is higher than the iron outlet, 2, a high-alumina brick layer which is arranged on a base wall of the cylindrical body, 3, a first carbon brick layer which is arranged on the high-alumina brick layer, 4, a second carbon brick layer which is arranged on an inner wall of the cylindrical body, wherein the top surface of the second carbon brick layer aligns with a lower edge of the slag inlet, and 5, a clay brick layer is arranged on the top surface and the inner side wall of the second carbon brick layer. The hot molten slag maintaining furnace for producing mineral wool can effectively adjust components of hot molten slag, is durable and has a low maintenance cost.

A method is provided for extracting cellular compounds from micro-organisms. The method includes culturing the micro-organisms and extracting the cellular compounds from the micro-organisms. Each step is carried out in a continuous manner, wherein the extraction step is carried out separately from the culture step and in conditions of biocompatibility with the micro-organisms. The method further includes at least one step of recovering the cellular compounds and at least one step of recirculating the micro-organisms towards the culture step.

The invention provides a polyurethane coating for indoor waterproofing. Its appearance is white and light gray, and it can be visually judged from the color that no dark toxic and harmful substances such as black coal tar, brown liquid coumarone, etc. are added; and it is suitable for use The spraying construction technology solves the problems of difficult scraping and quality control of polyurethane coatings. The invention also provides the preparation process and construction process of the polyurethane coating. The invention specially prepares a two-component water-based epoxy coating to be rolled on the base surface, which can wrap and consolidate the dust on the base surface, improve the bonding strength of the base surface, and at the same time act as an interface agent to seal the base surface to meet the requirements of polyurethane waterproof coatings. Construction requirements on wet substrates. The invention solves the problem of subsequent plastering and tiling of the polyurethane coating wall surface by patting and coating a special sand layer on the surface of the polyurethane waterproof coating; at the same time, the construction of this layer plays a very good role in protecting the polyurethane coating layer and avoids the exposure of the coating Damaged by UV rays.

The invention relates to a device for the detachable fastening of a desiccant cartridge on a housing of a compressed air production device of a vehicle, in particular a commercial vehicle. The device comprises a flange (6) with an abutment surface (9) at the bottom of the desiccant cartridge and an insertion opening (101) on the housing (100) of the compressed air production device, The flange ( 6 ) can be inserted at least in sections into the insertion opening ( 101 ) and in the insertion opening ( 101 ) the flange is connected in the axial direction by a form fit in the inserted state. stop.

The invention relates to a laser removing device for enameled wire cladding layer. The laser output from a laser output head is focused on the cladding layer of the enameled wire through a transmission optical path assembly. The enameled wire is coaxially arranged with the laser output head and the rotary driver. The rotary actuator rotates the transmission optical path assembly about its axis, removing the enameled wire cladding. A laser removing device for enamel wire clad layer adopts an automatic operation mode and utilizes laser to act on that enameled wire clad layer, which overcomes thedefect that the manual contact operation mode is easy to damage the enameled wire body and improves the working efficiency of removing the enameled wire clad layer compared with the sandpaper polishing mode; Compared with paint stripper, it can effectively reduce chemical pollution and personal hazards to operators.

The invention relates to a laser cleaning device for surface treatment of annular components, which comprises a flexible clamping turntable, an outer cleaning robot arm, an inner cleaning robot arm, an outer surface laser cleaning head and an inner surface laser cleaning head. The flexible clamping turntable can flexibly clamp annular components of different diameters. The outer cleaning robot arm is equipped with an outer surface laser cleaning head at the execution end, and the inner surface cleaning robot arm is equipped with an inner surface laser cleaning head at the execution end. The outer cleaning robot arm, inner cleaning robot arm, and flexible clamping turntable are linked together, and the outer surface laser cleaning head and the inner surface laser cleaning head turn on the laser, which can realize automatic cleaning of the inner and outer surfaces of the annular component. The invention adopts the method of laser cleaning to realize efficient automatic treatment of the inner and outer surfaces of the annular member, avoid manual operation, improve cleaning efficiency, improve the consistency of surface treatment quality, and avoid environmental pollution and personal health damage.

The invention relates to a melt spinning raw material for alumina continuous fiber, and a preparation method thereof, and alumina continuous fiber prepared from the melt spinning raw material. The preparation method comprises: 1) placing polyaluminoxane in a reaction kettle, heating to a temperature of 60-100 DEG C, carrying out pressure reducing distillation, continuously heating to a temperatureof 110-140 DEG C, carrying out thermal insulation, heating to a temperature of 150-200 DEG C, sampling, determining softening points, stopping the heating after the determined softening point achieves a target softening point, and cooling to a room temperature to obtain a solid alumina precursor PAO-P; 2) mixing a dispersant, aluminum-containing powder and a solvent according to a mass ratio of 1:(1.5-4):(3-6), and grinding to obtain a powder slurry; and 3) mixing the obtained precursor and the obtained powder slurry, heating to a temperature of 150-200 DEG C, and carrying out pressure reducing distillation to obtain the melt spinning raw material. According to the present invention, with the method, the alumina precursor PAO-P capable of being subjected to melt spinning is synthesized, the melt spinning and sintering process of the alumina fiber precursor is provided, and the defect that the alumina continuous fiber cannot be prepared through the melt spinning is overcome.

The invention relates to a device for releasably fastening a desiccant cartridge on a housing of a compressed air production device of a vehicle, in particular a commercial vehicle. The device comprises at least one fixing piece (7) having a first section (8) and a second section (9; 29; 39; 49), the first section and the flanged piece ( The end region (4a) of 4) and the end region (5a) of the cartridge cover (5) are rolled into connecting folds (6), from which the second section protrudes outwards.

The invention provides a water affinity type anti-pollution chlorine-resistant aramid composite membrane preparation method. The densities of a PEO chain, quaternary ammonium cation and salicylaldehyde which are grafted to the surface of a high-performance aramid composite membrane are high, the membrane surface hydrophilicity is high; a part sensitive to residual chlorine or chloride oxide compound in sea water of the composite membrane is eliminated through alkylation reaction of aramid active layer N-H groups, chemical damage to the composite membrane in a seawater desalination process is effectively avoided, and long-time stability of a structure of the aramid composite membrane is ensured; salicylaldehyde grafted to the membrane surface are in monomolecular-layer uniform distributionand can efficiently filter and adsorb heavy metal ions in the seawater, a synergistic antibacterial killing function between the quaternary ammonium cation and salicylaldehyde is generated, and positive significance in ensuring cleanness of the membrane surface is achieved.