59results about How to "Has acid resistance" patented technology

The invention relates to a multi-stage axial flow submerged pump with a long shaft and a method for conveying phosgene, which are mainly used for pressurizing and conveying the phosgene or chlorine gas. The submerged pump is provided with an inducer (1), a primary impeller (2), a secondary impeller (5), an auxiliary sliding bearing and shaft sleeve (6), a lower main sliding bearing and shaft sleeve (8), an upper main sliding bearing and shaft sleeve (10), a seal cavity (19) and a bearing bracket (28). The lower end of a packing box (13) is provided with an emergency seal rubber pneumatic bag (17); a double-end face mechanical seal (22) is sleeved on a pump shaft (30); a radial balancing hole (37) is arranged on the impeller; and the auxiliary sliding bearing and shaft sleeve (6) is made from silicon carbide. When both of the mechanical seal and the packing seal become invalid, high pressure nitrogen gas ensures that the emergency seal rubber pneumatic bag (17) is inflated to clasp the shaft so as to quickly block leakage of the conveyed phosgene.

The invention discloses an anticorrosion heat-insulation paint and a preparation method thereof. The paint comprises a base material and a solvent. The base material comprises an expoxy heat-insulation paint, auxiliary pigment and filling materials, a heat-insulation filling material, an antifoaming agent and a dispersant. The expoxy heat-insulation paint is composed of the following components in parts by weight: 40.21 to 40.61 parts of epoxy resin (the membrane), 40.21 to 40.61 parts of polyamide resin (curing agent), 3.76 to 4.16 parts of titanium dioxide, 3.76 to 4.16 parts of talcum powder, 7.52 to 8.52 parts of xonotlite-type calcium silicate (heat-insulation filling material), 1.61 to 1.63 parts of polyoxypropylene glycerol ether (antifoaming agent), 1.61 to 1.63 parts of polyacrylamide (dispersant), 11.86 to 15.1 parts of n-butanol, and 26.05 to 29.49 parts of xylene. After curing, the paint forms an enclosed micro-porous and netted fiber structure on the substrate, has the characteristics of good anticorrosion performance, strong adhesive force, and high compressive strength, and thus solves the problems of bad impact-resistant performance and low adhesive force on wall of conventional barrier heat-insulation paints. Moreover, the paint is convenient for construction, can be painted or brushed, and has strong plasticity.

The invention relates to a fungi-based biomass fireproof material with cornstalk as a main material and a preparation method thereof. The fireproof material is composed of the following ingredients (by weight): 30-65 parts of cornstalk, 10-20 parts of weed tree sawdust, 10-20 parts of wheat bran and 15-30 parts of a biomass fireproof material additive. A preparation method of the material comprises the following steps: preparation of a culture medium; sterilization treatment; and inoculated culture. By using biomass materials such as cornstalk and the like as raw materials and by the utilization of rapid growth of fungal hypha and strong kink force of mycelium, the biomass materials such as cornstalk and the like are converted into an environment-friendly biomass fireproof material. The preparation method of the biomass thermal insulation material is simple; production cost is low; and the product has good strength, good compactness and good fireproof performance. The material of the invention is an environment-friendly biomass fireproof material with market prospect and potential.

The invention discloses a low thermal conductivity wall thermal insulation coating and its preparation method and relates to the technical field of building materials. The low thermal conductivity wall thermal insulation coating is prepared from 75 to 85 parts of polyamide resin, 55 to 65 parts of epoxy resin, 45 to 55 parts of modified hollow ceramic beads, 35 to 40 parts of silica airgel, 30 to 33 parts of talc powder, 25 to 27 parts of glass wool, 20 to 23 parts of an inorganic additive, 15 to 20 parts of an infrared reflective pigment, 15 to 18 parts of aids and 85 to 95 parts of deionized water. The low thermal conductivity wall thermal insulation coating can form a low thermal conductivity protection layer on the wall after curing and has good corrosion resistance, cohesiveness and compressive strength.

The invention discloses a high-crack-resistance building waterproof material and a preparation method thereof. The high-crack-resistance building waterproof material is prepared from the following raw materials in parts by weight: 30-50 parts of polyether tribasic alcohol, 10-15 parts of petroleum asphalt, 5-10 parts of fluorocarbon resin, 8-15 parts of nano magnesium oxide, 12-15 parts of organic silicon modified epoxy resin, 12-18 parts of aluminum potassium sulfate dodecahydrate, 15-25 parts of hydroxyethyl cellulose, 4-9 parts of Portland cement, 10-20 parts of talcum powder, 2-10 parts of polyoxyethylene, 1-8 parts of magnesium stearate, 11-17 parts of acrylate, 2-8 parts of steel slag micropowder and 1-8 parts of trimethyl trimellitate. The high-crack-resistance building waterproof material integrates the heat-insulating property and waterproofness, has the advantages of higher compression resistance, long service life, favorable high-temperature resistance, certain elongation percentage, high crack resistance, low cost, favorable binding property, low oxidation and aging tendency, high tensile strength, favorable waterproof effect and the like, can form a waterproof layer on the object surface to effectively avoid the object oxidation, and can be used as a waterproof material for interior architecture. The high-crack-resistance building waterproof material has the advantages of simple formula, low cost and favorable properties, and is suitable for large-scale production.

The invention discloses an anti-aging coating for a power device and a preparation method thereof and relates to the technical field of coatings. The anti-aging coating is prepared from 55-65 parts of polyamide resin, 55-60 parts of organic silicone modified epoxy resin, 20-25 parts of thermoplastic expansion hollow microspheres, 18-20 parts of hydrophobic gas-phase silica, 15-17 parts of nano titanium dioxide, 13-15 parts of aluminum nitride, 13-15 parts of talcum powder, 20-25 parts of additive and 55-65 parts of water. The anti-aging coating has abrasion-resisting, waterproof, anti-aging, acid and alkali resistance properties, the preparation method is simple, the power device is effectively protected, and the service life is prolonged.

The invention acquires a mutant with 7 amino acid locus mutations, compared with a wild type chitinase, by screening from mutants after mutation is introduced through PCR into acid-resisting chitinasescreened from marine microorganisms in the prior art. The most adaptive pH detection shows that the most adaptive pH value of the mutant is 1.5 lower than that of wild type chitinase and is more beneficial to application of enzyme in hydrolysis of chitin.

The invention discloses a heat-insulated composite waterproof material for buildings and a preparation method thereof. The heat-insulated composite waterproof material is prepared from the following materials in parts by weight: 30-50 parts of polyether-tribasic alcohol, 10-15 parts of petroleum resin, 5-10 parts of fluorocarbon resin, 8-15 parts of nanometer magnesium oxide, 12-15 parts of organosilicon-modified epoxy resin, 12-18 parts of aluminum potassium sulfate dodecahydrate, 15-25 parts of synthetic rubber, 4-9 parts of wood fiber, 10-20 parts of talcum powder, 2-10 parts of polyvinyl alcohol, 1-8 parts of methyl silicone oil, 11-17 parts of acrylic ester, 2-8 parts of wood flour and 1-8 parts of trimethyl trimellitate. According to the heat-insulated composite waterproof material and the preparation method disclosed by the invention, the heat-insulated property and the waterproof property are integrated, the compression strength is stronger, the service life is long, the high-temperature resistance is excellent, certain elongation is achieved, the cracking resistance is strong, a waterproof layer is formed on the surface of an object, the oxidation of the object can be effectively avoided, the cost is low, the bonding property is good, the oxidation and the ageing are not easy, the tensile strength is high and the waterproof effect is good and the like; the heat-insulated composite waterproof material can be used as a waterproof material for indoor buildings, adopts a simple formula, is low in cost and excellent in property and is suitable for large-scale production.

The invention discloses a multi-round high-and-low temperature thermal recovery packer rubber sleeve and a production method thereof. The rubber sleeve comprises a flexible graphite rubber sleeve body, and a modified polytetrafluoroethylene outer sleeve is sleeved on the outside of the flexible graphite rubber sleeve body. The rubber sleeve overall has good mobility and compactness, high-and-low temperature seal can be achieved, and cracks can be prevented. The adaptation temperature is in a range of minus 20 DEG C to 360 DEG C, and the seal performance within the temperature range reach more than 20 MPa; the rubber sleeve can meet requirements for sealing of the packer in the high-temperature steam injection and cooling oil recovery work conditions when being used on a down-hole packer for pacing oil-casing circular space, and the rubber sleeve can still bear high-pressure seal effectively under the high temperature and low temperature multi-time alternative changes; the high-pressure-bearing seal performance reliability can be maintained in the high and low temperatures after multi-round steam huff and puff, and the rubber sleeve is particularly applicable to processes of oil field steam huff and puff, steam driving and the like in heavy-oil thermal recovery.

The invention discloses an inorganic fire-prevention rust-prevention coating for steel structures and a preparation method thereof. The coating is a mixture of powder and colloid. The weight ratio of power to colloid is 1:(0.8-1.2). The colloid is potassium metasilicate. The powder is prepared from the following components in percentage by weight: 5-40% of magnesium mountain powder, 5-40% of talcum powder, 4-35% of silica powder and 4-25% of silicon aluminium powder. The granularity of the magnesium mountain powder is 2500-6500 meshes, the granularity of the talcum powder is 2000-6000 meshes, the granularity of the silica powder is 3000-8000 meshes, and the granularity of the silicon aluminium powder is 600-2000 meshes. According to the preparation method of the inorganic fire-prevention rust-prevention coating for steel structures, provided by the invention, the powder and the colloid are mixed uniformly. The inorganic fire-prevention rust-prevention coating for steel structures has good high-temperature-resistant performance and good rust-prevention effect.

The invention discloses acid-resistant and facultative anaerobic manganese oxidizing bacteria and an application thereof. The bacteria are brevibacillus brevis, which is classified and named as Brevibacillus brevis MM2, has been collected in the Guangdong Microbial Culture Collection Center, has the collection number of GDMCC NO:60819 and is collected in October 23, 2019. The Brevibacillus brevisMM2 is acid-resistant, facultative anaerobic and stronger in environment adaptability, can be used for removing heavy metals in acidic mine wastewater or acidic industrial wastewater, can adapt to wastewater in different dissolved oxygen conditions, and is also suitable for a biological in-situ remediation technology in an oxygen-deficient environment.

The invention discloses manganese oxidizing bacteria capable of being used for high-efficiency demanganization and an application of the manganese oxidizing bacteria. The bacteria are bacillus, the classification name is Brevibacillus sp.MM1, the Brevibacillus sp.MM1 is preserved in Guangdong Microbial Culture Collection Center, the preservation number is GDMCC NO:60818, and the preservation dateis October 23, 2019. The Brevibacillus sp.MM1 provided by the invention has higher manganese oxidizing ability, and can efficiently remove Mn<2+> in a water body or solid substrate under acidic and neutral conditions, can remove multiple heavy metals such as iron, copper, zinc, chromium, cadmium and arsenic, and has broad application prospects.

The invention provides a visible light photo-controlled acid-resistant fluorescent molecular switch and a synthesis method thereof. The specific molecular structure of the molecular switch is 3-primary amine or secondary amine substituted rhodamine spiroamide as a basic structural unit, and the structural formula of the molecular switch is represented by formula (1). The 3-primary amine or secondary amine substituted rhodamine spiroamide of the invention has acid resistance, and also retains the photoactivation performance, so like photoactivated acid-resistant fluorescent molecular switch dyes can be used in a living cell super-resolution imaging technique, and are not interfered by the acidic environment. The 3-primary amine or secondary amine substituted rhodamine spiroamide dye also can be used in fields of sensing and detection as a molecular fluorescent probe.

The invention discloses sound-insulation ceramic tiles and belongs to building decoration materials. The ceramic tiles are prepared from, by weight, 28-41 parts of clay, 12-24 parts of feldspar, 8-20.5 parts of powdery quartz, 3.3-4.8 parts of chalk powder, 3-4.35 parts of magnesite, 2.85-4.15 parts of talcum powder, 2.4-3.9 parts of nepheline syenite, 2.28-3.76 parts of pyrophyllite, 2.1-3.53 parts of spodumene, 1.85-4 parts of fibrous brucite and 0.01-0.025 part of beryl. The problem that existing ceramic tiles are poor in sound-insulation effect can be solved.

The invention discloses an (R)-Lansoprazole time-selection pulse controlled-release pellet preparation and a preparation method thereof.The basic structure of the preparation comprises a blank pellet core, a medicine layer, a swelling layer and an enteric controlled release layer from inside to outside.The swelling layer contains swelling materials and a binding agent, and the enteric controlled release layer contains enteric materials and sustained-release materials.Compared with routine technologies, the release rate of the pellets, prepared through the preparation method, in a 0.1 mol/L hydrochloric acid solution is smaller than 10% of labeled amount within two hours of tolerance, certain time lag is presented at the upper end of the small intestine, and then quick pulse controlled-release is conducted.Adopted adjuvant is easy to get, the production technology is simple and controllable, and the preparation is suitable for industrial production.

The invention relates to the technical field of pigment production processes, in particular to a red pigment for wall surface painting and a preparation method of the red pigment. The red pigment forwall surface painting comprises the following raw materials in parts by weight: 40-50 parts of an anemone red pigment extract, 55-65 parts of polyacrylic acid emulsion, 10-15 parts of arabian jasmineflower powder, 3-5 parts of oxidized hydroxypropyl starch, 30-40 parts of talcum powder, 1-3 parts of a water-based defoamer BEK-750, 3-5 parts of D-mannitol, 3-5 parts of sodium benzoate, 1-3 parts of fungicide, 2-4 parts of propylene glycol, 6-8 parts of sodium alginate and 55-60 parts of water. The prepared pigment is safe and environmentally friendly, is stable in quality, high in coloring power, bright in color and abundant and saturated in color, and the pigment has high color retention and flexibility; and the red pigment for wall surface painting has the characteristic of rapid drying,is bright in color, high in coloring power and long in storage time, cannot fade out due to solarization when used in an outdoor environment, is environmentally friendly and nontoxic when used in anindoor environment, is easy to store for a long time, and is quite suitable for wall surface painting of a school.

The invention relates to technical application of geotechnical materials, in particular to a heavy metal blocking fiber net/high polymer composite waterproof coiled material and a preparation method thereof. The composite waterproof coiled material specifically comprises a modified high polymer layer and three-dimensional fiber net layers arranged on the upper side and the lower side of the modified high polymer layer. The modified high polymer layer is prepared from the following raw materials: 10 to 30 parts of modified ethylene-vinyl acetate copolymer, 30 to 50 parts of high density polyethylene and 10 to 30 parts of metallocene polyethylene; the modified ethylene-vinyl acetate copolymer is obtained by initiating crosslinking modification of an ethylene-vinyl acetate copolymer and butyl xanthic acid; and the three-dimensional fiber web layers are obtained by opening, carding to form a web, laying the web and needling PET fibers. The composite material can adsorb heavy metal ions and achieve heavy metal blocking, has good mechanical properties, is resistant to high temperature and acid and alkali, and can be widely applied to geotechnical materials for soil pollution environment treatment.

The invention discloses a formula of a self-adhesive waterproof coiled material. The formula comprises asphalt, rubber oil, a styrene thermoplastic elastomer, butadiene styrene rubber, tire rubber powder, talcum powder, a polyester tire, 4000 kg of asphalt, 1200 kg of rubber oil, 400 kg of a styrene-series thermoplastic elastomer, 200 kg of butadiene styrene rubber, 1350 kg of tire rubber powder,2850 kg of talcum powder and 200 g of a polyester tire. The invention relates to a self-adhesive waterproof coiled material and a production process thereof, and belongs to the field of building materials. In the material, the rubber oil has the characteristics of improving the elasticity, the flexibility, the processability and the mixing property of rubber; the viscosity, rigidity, softening temperature and cohesion bonding strength of the material can be strictly controlled and changed by the styrene thermoplastic elastomer; and talcum powder has excellent physical and chemical characteristics of lubricity, fire resistance, acid resistance, insulativity, high melting point, inactive chemical property, good covering power, softness, good gloss, strong adsorption capacity and the lik. Inconclusion, the construction of the waterproof roll is facilitated, and meanwhile the bonding effect and the high-temperature resistance of the waterproof roll are improved.