13results about How to "Low volatile" patented technology

The invention discloses a preparation method of low-volatile-matter side hydrogen-containing silicone oil, and belongs to the technical field of silicone oil production. The preparation method of the hydrogen-containing silicone oil comprises the following steps: (1) adding a hydroxyl-terminated polydimethylsiloxane oligomer (linear body) and a phosphonitrile chloride composite catalyst into a reaction kettle, stirring, vacuumizing, and heating for reaction; (2) detecting the viscosity on line, when the viscosity reaches the specified viscosity, recovering the normal pressure, adding the high-hydrogen silicone oil, hexamethyldisiloxane and phosphonitrile chloride composite catalyst, and reacting at low temperature; and (3) adding a terminator to finish the reaction, and filtering to obtain the hydrogen-containing silicone oil. The hydrogen-containing silicone oil is prepared by adopting the linear body, the high-hydrogen-content silicone oil and the high-catalytic-activity phosphonitrile chloride as raw materials, no obvious cyclosiloxane is generated in the reaction process, the content of low-boiling-point substances is extremely low, the cost of the raw materials is reduced, the problem that a large amount of solid waste is generated in a neutralization reaction in a traditional acid equilibrium catalysis process is solved, and environmental pollution is reduced.

The invention discloses a UV adhesive composition for ultraviolet curing organic silicon and difficult-to-adhere materials, which is characterized in that hydrogen-containing double end sockets and 4-vinyl epoxy cyclohexane are subjected to hydrosilylation reaction in the presence of a platinum catalyst to obtain an epoxy group double end socket, the epoxy group double end socket and excessive acrylic acid are subjected to ring-opening esterification reaction in the catalyst to obtain a hydroxyl acryloyloxy group double end socket, and the hydroxyl acryloyloxy group double end socket and the hydroxyl acryloyloxy group double end socket are subjected to ring-opening esterification reaction in the catalyst to obtain the UV adhesive composition for the difficult-to-adhere materials. The preparation method comprises the following steps: carrying out an esterification dehydration reaction with acrylic acid in the presence of a cyclohexane water-carrying agent to obtain bisacryloyloxy double end sockets, and finally reacting with polydimethylsiloxane in the presence of a linear phosphonium chloride catalyst to obtain the ultraviolet curing organic silicon oligomer. The low polymer is matched with an acrylate monomer and a free radical photoinitiator to form the UV adhesive, and the UV adhesive has excellent bonding strength on low-surface-energy substances.

The invention belongs to the technical field of negative electrode materials, and particularly relates to a graphite coating method. By adopting a three-step method of low-temperature softening, aqueous solution washing and high-temperature carbonization, the staged control of the contents of the three components in the working procedures is realized, and the content of each component of the asphalt in each working procedure is always in the optimal ratio. According to the invention, the uniformity in the coating process can be ensured, the coking value can be increased, and the hardening degree of the material can be reduced, and the adopted aqueous solution detergent can also ensure the full reaction of the organic polymer material and the components in the asphalt, and does not remain in the graphite material, so that the negative gain effect is avoided. The method disclosed by the invention is simple in process flow, low in volatile pollutant emission, low in production cost and suitable for large-scale industrialization.

The invention discloses a dry-type reactor encapsulation insulation epoxy resin system and a preparation method thereof. The dry-type reactor encapsulation insulation epoxy resin system comprises the following components in parts by weight: 40-90 parts of electronic-grade epoxy resin, 20-90 parts of bisphenol F epoxy resin, 5-20 parts of oxazolidinone epoxy resin and 2-5 parts of a curing agent. The dry type reactor encapsulation insulation epoxy resin system provided by the invention can improve the humidity and heat resistance and toughness of the current epoxy resin insulation material, reduce the microcrack and water absorption of the epoxy resin insulation material, improve the insulation capability of the insulation material, and improve the impact resistance, short circuit resistance and insulation performance of the reactor.

This invention discloses a silicate colloid for high-solids-content, high-modulus composite fire-resistant glass and its preparation method, relating to the field of composite fire-resistant glass technology. Specifically, it describes a silicate colloid for high-solids-content, high-modulus composite fire-resistant glass and its preparation method. The colloid, by weight percentage, comprises a silicon source, water, glycerol / ethylene glycol / polyethylene glycol / polyglycerol, water-soluble organic acids and salts, water-soluble metal oxides or hydroxides, and alkali metal hydroxides, wherein the solids content is 60-75% and the modulus is 4.0-5.5. The preparation method includes: uniformly mixing the silicon source, water, additives, and functional additives, then adding alkali metal hydroxides, reacting at 50-90°C to obtain a prepolymer solution, followed by vacuum degassing. The viscosity is adjusted to the desired range by controlling the reaction conditions. This prepolymer solution is suitable for pouring or coating processes. After curing, the colloid forms a fire-resistant glass core layer. The resulting fire-resistant glass has advantages such as high light transmittance, ultra-thinness, dense foaming, low-temperature resistance, high weather resistance, and long lifespan.

The invention provides a preparation method of porous graphite and a material for preparing the porous graphite, the method comprises the following steps: adding modified water-soluble cellulose and a dispersing agent into deionized water, and uniformly stirring to obtain a resin base solution; the viscosity of the resin base solution is 110 to 140 cps; adding polystyrene microspheres into the resin base solution, and fully stirring to obtain a mixed solution; pouring the mixed solution into a mold, then putting the mold into a drying oven, drying at 90-120 DEG C, and removing the mold to obtain resin; placing the resin in a carbonization furnace, carrying out carbonization treatment in a protective atmosphere, and naturally cooling to normal temperature to obtain a porous graphite base material; repeatedly dipping and carbonizing the porous graphite base material by using the resin base solution until the preset density is reached, so as to obtain a densified base material; and placing the densified base material in a high-temperature furnace, and carrying out graphitization treatment at 2500-2600 DEG C to obtain the porous graphite.

The utility model belongs to the field of chemical production, and relates to a production system combining biomass carbonization and gasification with urea synthesis, which comprises a biomass carbonization unit, a charcoal gasification unit, a water gas shift reaction unit, an ammonia synthesis unit and a urea synthesis unit which are sequentially connected in series, the biomass carbonization unit comprises a biomass carbonization furnace; the biochar gasification unit comprises a biochar gasification furnace; the water gas shift reaction unit comprises a shift reactor and is used for converting carbon monoxide and water vapor in the combustible gas 2 into hydrogen and carbon dioxide through reaction; the ammonia gas synthesis unit comprises an ammonia gas synthesis tower; and the urea synthesis unit comprises a urea synthesis tower. According to the technical scheme, in a urea synthesis unit process, the problems that equipment is blocked by tar, the urea synthesis efficiency is influenced by deposition on the surface of a catalyst and the like are effectively avoided, and the production efficiency and the yield are improved.

The application discloses a single-component dealcoholized sealant and a preparation method and application thereof. The single-component dealcoholized sealant comprises the following raw materials in parts by mass: 80-120 parts of alkoxyl-terminated polydimethylsiloxane; 40-70 parts of surface-modified silica powder; 10-40 parts of flame retardant; 3-12 parts of flame retardant synergist; 3-12 parts of fumed silica; 5-40 parts of plasticizer; 0.5-10 parts of crosslinking agent; 0.5-10 parts of catalyst; and 0.5-10 parts of adhesion promoter. The structural formula of the alkoxyl-terminated polydimethylsiloxane is shown as formula (I): (R1O)3SiCH2CH2[(CH3)2SiO]nSi(CH3)2CH2Si(OR2)3 n Formula (I), wherein R1 and R2 are independently selected from C1-C10 alkyl, and n is 800-2200. The sealant has good storage stability, low hardness and high elongation, low viscosity, good extrudability, no corrosion to PC, fast curing speed, low density and good flame retardancy.

A preparation method of the UV adhesive composition comprises the following steps: carrying out a hydrosilylation reaction on hydrogen-containing double end caps and AGE in the presence of a platinum catalyst to obtain an epoxy group double end cap agent, then carrying out a ring-opening esterification reaction on the epoxy group double end cap agent and excessive acrylic acid in the presence of a catalyst to obtain a hydroxyl acryloyloxy group double end cap agent, and finally, carrying out a reaction on the hydroxyl acryloyloxy group double end cap agent and the hydroxyl acryloyloxy group double end cap agent to obtain the UV adhesive composition. The preparation method comprises the following steps: carrying out an esterification dehydration reaction with excessive acrylic acid in the presence of a cyclohexane water-carrying agent and an acidic catalyst to obtain a bisacryloyloxy double-end-capping agent, and finally reacting with polydimethylsiloxane under the action of a linear phosphonium chloride catalyst to synthesize the light-cured organosilicon oligomer. The low polymer is matched with an acrylate monomer and a free radical photoinitiator to form the UV adhesive, and the UV adhesive has excellent bonding strength on low-surface-energy substances.

The invention discloses a method and a device for stripping and recycling sediments of a drainage pipe channel driven by an ion exchanger, and relates to the field of drainage pipe channel sediment treatment.The method comprises the following steps: step S1, large-particle impurities are removed through a screen and 0.1 MPa water pressure flushing, and sieved sediments A are obtained; s2, mixing A with water to form a feeding sediment B; s3, adding an ion exchanger, and stirring for more than 2 hours to form a mixture C; s4, separating out the ion exchanger to obtain a discharge sediment D; s5, carrying out solid-liquid separation on D, discharging organic components into a pipe channel, and detecting volatile components from inorganic components; step S6, detecting the volatile component proportion of the inorganic component, and if the volatile component proportion exceeds 5%, repeating the process; and S7, the ion exchanger is recycled after being cleaned and regenerated. The invention provides an efficient, environment-friendly and economical drainage pipe and canal sediment treatment method, efficient stripping of organic components and high-quality recycling of inorganic components can be realized, and meanwhile, environmental pollution and resource consumption are reduced.

The invention relates to the field of combustion improvers, in particular to a decoking and coal-saving combustion improver and a preparation method thereof.The decoking and coal-saving combustion improver is prepared from, by weight, 1.0-6.0 parts of magnesium chloride, 2.0-7.5 parts of potassium chlorate, 1.5-11.0 parts of potassium perchlorate, 2.0-12.0 parts of calcium carbonate, 8.5-14.0 parts of calcium oxide, 4.0-7.5 parts of calcium hydroxide, 2.4-10.0 parts of catalyst, 8.5-11.5 parts of fatty acid, 1.5-2.5 parts of potassium hydroxide, 0.5-2.0 parts of acetic acid and 30.0-35.0 parts of activated carbon. The preparation method comprises the following steps: dividing raw materials into a group A, a group B and a group C; modulating the A group of raw materials based on a modulator; diluting potassium hydroxide in the group B raw material with pure water, adding activated carbon with a preset particle size, fully mixing and stirring, and drying; the raw materials of the group C, the treated raw materials of the group A and the treated raw materials of the group B are fully stirred and mixed to complete preparation of the decoking and coal-saving combustion improver, and the precipitation amount of coal tar in the combustion process is inhibited on the basis of improving the combustion efficiency of coal.

The invention relates to the technical field of biological fermentation, and discloses a pretreated lignocellulose biomass and a preparation method thereof, the pretreated lignocellulose biomass comprises 35-65% of water, 10-25% of cellulose, 0.5-4% of hemicellulose, 8-16% of lignin, 3-10% of sugar, 0.1-5% of an inhibitor, 1-5% of inorganic acid and / or organic acid, and 0.01-5% of ash. The pretreated lignocellulose biomass provided by the invention has the characteristics of high sugar content, low ash content, low inhibitor content and the like, and is beneficial to subsequent enzymolysis and fermentation.

The invention discloses a UV (ultraviolet) adhesive composition of acrylic acid modified organic silicon and difficult-to-adhere materials, which is prepared by the following steps: carrying out hydrosilylation reaction on hydrogen-containing double end sockets and trimethylolpropane monoallyl ether in the presence of a platinum catalyst, and then carrying out esterification dehydration reaction with excessive acrylic acid in the presence of an acid catalyst and a cyclohexane water-carrying agent, so as to obtain the UV adhesive composition of the acrylic acid modified organic silicon and difficult-to-adhere materials. And reacting the organic silicon double-end-capping agent with an organic silicon linear body under the action of a linear phosphonium chloride catalyst to synthesize the polydimethylsiloxane oligomer with two acryloyloxy groups at two ends. The low polymer is matched with an acrylate monomer and a free radical photoinitiator to form the UV adhesive, and the UV adhesive has excellent bonding strength on low-surface-energy substances.