111results about How to "Fully vulcanized" patented technology

The invention relates to a color rubber and plastic heat-insulating material and a preparation method thereof. The rubber and plastic heat-insulating material is prepared from polrvinyl chloride paste resin, dinitrosopentamethylene tetraamine, an antiager, styrene rubber, protective wax, an antioxidant, chlorosulfonated polyethylene rubber, diphenyl guanidine, mercaptobenzothiazole, zinc dibutyl dithiocarbamate, zinc diethydithiocarbamate and the like. The performance and the color difference of the product are stabilized by adding a coloring material to perform banburying on the finished rubber again and combining a new vulcanizing foaming technology and a super-long water-cooling system; the prepared color rubber and plastic heat-insulating material does not have fibers and dust, prevents dew formation, has a smooth surface and high cleanliness, has the same bright color as equipment, is environmentally-friendly and non-toxic, reduces secondary construction, saves cost, greatly improves the using performance of the product, prolongs the service life and takes full advantage of the product performance.

An improved polymerization and work-up process makes it possible to produce specific nitrile rubbers which have a particular ion index which is responsible for an excellent vulcanization rate and leads to vulcanizates having an advantageous property profile.

The invention discloses a hydrocracking startup method. The hydrocracking startup method comprises the following steps: introducing low-nitrogen startup oil, hydrogen and a sulfurizing reagent into a hydrocracking unit; then carrying out sulfuration on a hydrocracking catalyst at a constant temperature of 220 to 260 DEG C; after the content of hydrogen sulfide in to-be-cycled hydrogen reaches 3000 to 5000 ppm, reducing the adding rate of the sulfurizing reagent and increasing the bed temperature of the hydrocracking catalyst; when the bed temperature of the hydrocracking catalyst reaches 310 to 330 DEG C, increasing the adding rate of the sulfurizing reagent; and continuing constant-temperature sulfuration, then allowing the temperature to rise to 340 to 350 DEG C and introducing raw oil for a reaction, wherein the amount of the hydrocracking catalyst is 0.5 to 8% by weight. The method provided by the invention is short in time for startup, raw material switching and entry into a stable production state, avoids the consumption of a passivating agent and potential hazards during ammonia injection in the startup process, reduces energy consumption, and decreases pollution of the passivating agent to environment and harm of the passivating agent to human beings.

A cable for high power transmission equipment, its structure from inside to outside is: inner conductor, first semiconductive wrapping shielding layer, inner conductor insulation, second semiconducting wrapping shielding layer, outer conductor, wrapping layer, Outer conductor insulation and outer sheath. The insulating layer of the inner conductor is made of silicon rubber; the outer conductor is braided with one or more layers of tinned copper wire; the insulating layer of the outer conductor is made of silicon rubber; the outer sheath layer is made of polyurethane. The manufacturing method of the cable comprises: 1) manufacturing the inner conductor; 2) manufacturing the first semiconductive wrapping shielding layer; 3) manufacturing the inner conductor insulating layer; 4) manufacturing the second semiconductive wrapping shielding layer; 5) manufacturing 6) manufacturing the wrapping layer; 7) manufacturing the insulating layer of the outer conductor; 8) manufacturing the outer sheath layer. In each step, a specific process method is adopted, so that the electrical and mechanical properties of the cable prepared by this method can meet or exceed the detection requirements, so that the cable for high-power transmission equipment can transmit high power safely and reliably, and has the advantages of light weight. , miniaturization, low temperature resistance, good flexibility, small bending radius and other excellent performances, suitable for high electric energy technical equipment.

The invention relates to an internally circulating wet flue gas desulfurization tower which is used for industrial flue gas desulfurization. The internally circulating wet flue gas desulfurization tower comprises a tower foundation and a tower body. The tower body is internally provided with a wet flue gas desulfurization system; the upper end of the tower body is provided with a flue gas outlet at which a demisting system is arranged, the lower end of the tower body is provided with a flue gas inlet and the bottom of the tower body is provided with a slurry tank; the upper part of the slurry tank is connected with a slurry supplementing system, and the lower part of the slurry tank is connected with a deashing system; the tower body is externally provided with a slurrying system; and the slurrying system is connected with the wet flue gas desulfurization system through a spraying circulating pump. The internally circulating wet flue gas desulfurization tower can remove the harmful components in the flue gas, reduce the pollution and the emission and effectively save water resource.

The invention discloses a preparation method of a vulcanized hydrogenation catalyst. The method comprises the steps as follows: (1) a vulcanizing agent, a vulcanizing aid, an emulsifier and additive particles are uniformly mixed, the mixture is subjected to a constant-temperature reaction, then, an aqueous solution containing hydrogenation active metal is added, the mixture reacts for 5-60 min, the additive particles are removed by separation, and a liquid mixture I is obtained; (2) a peptizing agent, water and urea are uniformly mixed and a liquid mixture II is obtained; (3) an aluminum source is added to an acidic aqueous solution for slurry making, the liquid mixtures I and II are added, and the slurry is mixed uniformly; (4) the slurry in the step (3) is subjected to quick evaporativeconcentration to form concentrated slurry, slow drying treatment is performed, and a semi-dried material is obtained; (5) the semi-dried material obtained in the step (3) is ground, subjected to extrusion molding and roasting, and the vulcanized hydrogenation catalyst is obtained. The catalyst preparation and vulcanizing processes are completed simultaneously, and the catalyst has uniform pore diameter distribution, is simple to prepare and has wider market application prospects.

The invention discloses a heavy oil hydrotreatment catalyst and a preparation method thereof, the heavy oil hydrotreatment catalyst comprises a hydrogenation active metal component and a carrier, thehydrogenation active metal component is one or more of VIB group metals and/or VIII group metals, and the carrier is petroleum coke-based activated carbon. The preparation method comprises the following steps: uniformly mixing petroleum coke, a pore-enlarging agent and an activating agent and then carrying out activating treatment; mixing the obtained sample with an acid solution, uniformly mixing, washing and drying to obtain a carrier; introducing the hydrogenation active metal into the carrier, and then drying and roasting to obtain the heavy oil hydrotreating catalyst. According to the invention, petroleum coke-based activated carbon is used as a carrier of the catalyst, so that the carbon deposition resistance of the catalyst is improved.

The invention belongs to the field of silicone rubber, and discloses silicone rubber masterbatch. The silicone rubber masterbatch comprises the following components in parts by weight of: 80-90 partsof polysiloxanes di-Me Me vinyl vinyl group-terminated crude rubber of which the vinyl mol content is 0.03%-0.23% and the molecular weight is 600-800 thousands, 7-16 parts of the polysiloxanes di-Me Me vinyl vinyl group-terminated crude rubber of which the vinyl mol content is 1%-5% and the molecular weight is 600-800 thousands, 1.5-5 parts of the polysiloxanes di-Me Me vinyl vinyl group-terminated crude rubber of which the vinyl mol content is 3%-10% and the molecular weight is 600-800 thousands, 0.5-1.5 parts of of silicone oil of which the vinyl mol content is 5%-30% and the stickiness is 10-100 thousands, 51-63 parts of fumed silica, 10-13 parts of hydroxyl silicone oil, 1-2 parts of vinyl hydroxyl silicone oil, 4-7 parts of dimethyl dimethoxy silicane, 4-5 parts of dirthoxydimethylsilane, 0.5-1 part of pure water; and 0.1-0.2 part of a demoulding agent. The silicone rubber obtained from the silicone rubber masterbatch can meet the requirements of medical throat hood pipes for goodshaping bending degree, good appearance transparency, freedom from bubbles, freedom from gelatin of products, and good ageing performance after being used for a long term. Besides, the invention further provides a preparation method of the silicone rubber.

The invention relates to an LED (light-emitting diode) packaging adhesive with high refraction index. A production method for the LED packaging adhesive comprises the following steps of: performing hydrolysis reaction on liquid A and liquid B to obtain hydrolysate and performing condensation under the catalysis of an alkaline catalyst to obtain a component A-based adhesive; performing hydrolysis reaction on liquid C and liquid D to obtain hydrolysate and performing condensation under the catalysis of an alkaline catalyst to obtain a component B-based adhesive; and mixing the component A-based adhesive and the component B-based adhesive to obtain the LED packaging adhesive. The LED packaging adhesive improves the plasticity of high-hardness vulcanization pieces, completely avoids lamp failure and yellowing phenomenon caused by the colloid, has high compactness and low air permeability of the molecular structure and has extremely high luminous flux.

The invention discloses a porous propping agent combination and a preparation method thereof; the propping combination comprises a porous propping agent, sulfur which occupies 20-300 percent of the weight of the porous propping agent, organic solvent which occupies 0-50 percent of the weight of the porous propping agent and auxiliary agent which occupies 0-25.0 percent of the weight of the porous propping agent. The propping agent combination is suitable for hydrogenation disposal process. The porous propping agent combination provides vulcanizing agent for the oxidated hydrogenation catalyst, shortens the commencement time of the device, improves the production efficiency, overcomes the defects of pre-vulcanization in the device, and can solve the problem of concentrative heat discharge of pre-vulcanized catalyst outside the device. Furthermore, the sulfur introduced in the porous propping agent is mainly arranged in holes of the propping agent, increases no volume of the propping agent, thus affecting no disposal quantity of the device further.

The invention provides high-temperature-stable type modified asphalt. The high-temperature-stable type modified asphalt is prepared from the following components: matrix asphalt, rubber powder, natural rubber, aromatic lightweight oil, polyester fibers, polyethylene and sulfur; a preparation method comprises the following steps: (1) heating the matrix asphalt to 200 to 210 DEG C; then adding the matrix asphalt into a stirring tank; adding the rubber powder and the natural rubber into the stirring tank, and continually stirring for 30 to 40min to obtain a mixture I; (2) adding the aromatic lightweight oil, the polyester fibers and the polyethylene into the stirring tank respectively and carrying out primary stirring; when the temperature in the stirring tank is 150 to 160 DEG C, adding thesulfur and carrying out secondary stirring to obtain a mixture II; (3) pumping the mixture II into a development tank, wherein the fermentation time is 45 to 55min; cooling to obtain the high-temperature stable type modified asphalt. The high-temperature stable type modified asphalt provided by the invention has the advantages of high stability and good elastic recovery; the preparation method issimple, has an easy-to-control process and is applicable to popularization and application.

The present invention discloses peroxide vapor sulfurizing process for EPDM rubber pipe, and features that after the rubber pipe is set inside the sulfurizing tank, water vapor is first filled into the tank to exhaust air before performing normal sulfurizing process. The EPDM rubber pipe through the said process has sufficient sulfurizing, no stickness surface and high performance, and is suitable for use in automobile.

The invention relates to the field of hydrogenation and refining, and discloses a hydrogenation catalyst and a preparation method and application thereof. The catalyst comprises a carrier, and activemetal components which are loaded on the carrier, wherein the active metal components include Mo and at least one VIII cluster metal element; Mo is in a form of trisulfide; the VIII cluster metal element is in a form of salt. The hydrogenation catalyst preparation method comprises the following steps: dipping the carrier in a molybdate tetrathiolate solution; thermally processing in an insert atmosphere or reduction atmosphere to obtain a composite material A, wherein Mo in the composite material A is in the form of trisulfide during thermal processing; dipping the composite material A in a solution containing the VIII cluster metal salt; drying the dipped solid material. With the adoption of the preparation method, the vulcanization process is eliminated; the active components of the prepared catalyst are fully vulcanized; the hydrogenation performance of the catalyst is obviously improved.

The invention discloses an aging-resistant rubber belt track. Raw materials comprise rubber, accelerant, magnesium oxide, zinc oxide, an anti-aging agent, carbon black, a silane coupling agent kh550,scorch retarder PVI, stearic acid, low-density naphthenic oil, superfine active clay, calcium carbonate, a light stabilizer and a fire retardant, and the aging-resistant rubber belt track is producedthrough initial mixing, mixing, packing and batch-out. Through different rubber components, by adding the anti-aging agent, the scorch retarder, the fire retardant, the carbon black, the superfine active clay, the light stabilizer and the like, the aging-resistant performance and the intensity of the rubber are improved, and the service life of the rubber is prolonged; and the accelerant, the magnesium oxide, the zinc oxide, the silane coupling agent kh550 and the like are adopted for promoting a vulcanization process of the rubber, so that vulcanization of the rubber is fuller.

The invention discloses a preparation method for a vulcanized sealant for fuel cells. The preparation method includes the following steps: S1, selecting unvulcanized raw rubber, a vulcanizing agent and a catalyst to put into microwave generator equipment; S2, setting power, starting a microwave generator, performing vulcanization, and stopping a microwave heating process after M sec; S3, after cooling for L sec, restarting the microwave to perform vulcanization, and stopping the microwave heating process after N sec; and S4, cycling the step S2-S3 for multiple times, and performing an intermittent pulse vulcanization process until an appropriate vulcanized sealant is obtained. The preparation method is simple, high in production efficiency and low in energy loss, vulcanization uniformity can be effectively promoted, and product quality can be enhanced.

The invention discloses a start working method of a hydrogenation catalyst. The start working method comprises following steps: 1, a sulfuration-type hydrogenation catalyst is delivered into a reactor; 2, an insert gas is introduced into the reactor to replace air in the reactor, and the sulfuration-type hydrogenation catalyst is subjected to sulfuration in the insert gas atmosphere; 3, after sulfuration, the inert gas is replaced by hydrogen gas, the pressure and the temperature in the reactor are adjusted to a reaction pressure and a reaction temperature when gas flow is stable, and a raw material oil is introduced for hydrogenation, wherein the sulfuration-type hydrogenation catalyst comprises a hydrogenation active metal component, a carrier, and an organic compound. In start working sulfuration, the metal on the surface of the hydrogenation catalyst is subjected to in-suit sulfuration directly, generation reaction of hydrogen sulfide and sulfuration reaction of hydrogen sulfide with active metal are not needed, the initial sulfuration temperature in catalyst start working is increased greatly, rapid temperature increasing in catalyst sulfuration is avoided, and start working time is shortened greatly.

The invention discloses a paper feeding wheel and a manufacturing method thereof. The paper feeding wheel consists of a plastic framework and a rubber wheel sleeved on the plastic framework, wherein the rubber wheel is made of a rubber composition; and the rubber composition comprises rubber with high wear resistance and strength, an effective rubber vulcanizing system, more than one antioxidants, and a proper amount of reinforcing filler and softening agent, wherein the effective rubber vulcanizing system is suitable for a composition of butadiene rubber and natural rubber; one of the more than one antioxidant has a function of assisting in demoulding after rubber is vulcanized; and the proper amount of reinforcing filler and softening agent can improve the strength of the rubber wheel and cannot obviously improve hardness. The invention has the advantages that: the manufacturing process is simple, and the rubber wheel is formed by a mold through one-time compression moulding, and is not required to be processed; the surface of the paper feeding wheel is hardly subjected to frost spray; and the frictional property of the surface of the paper feeding wheel can be kept for a long time.

The invention discloses a rapid start-up method of a hydrocracking catalyst. The start-up method comprises the following steps: introducing raw material oil in the vulcanization process, after vulcanization is completed, adjusting a reaction temperature, and when the mass yield of light oil less than 360 DEG C is stabilized at 35-40%, adjusting to a hydrocracking reaction condition to carry out ahydrocracking reaction, wherein the hydrocracking catalyst comprises 0-10% of a molecular sieve by weight, and the molecular sieve comprises, but not limited, a Y type or a USY (Ultra-Stable Y Zeolite) type molecular sieve. The method is simple in start-up and raw material switching process, stable in operation and capable of avoiding consumption of a passivant in the start-up process and potential danger in the ammonia injection process.

The invention relates to an adhesive for lining hard rubber, in particular to an adhesive for hot water-cured lining hard rubber, which is a mixture of components A and B in a weight part ratio of 4:1. The component A comprises 100 parts of natural rubber, 1 to 3 parts of pigment, 20 to 40 parts of sulfur, 50 to 150 parts of zinc oxide, 15 to 40 parts of tackifying resin, 1 to 3 parts of accelerator DM1, 2 to 5 parts of mixed oil 933 and 400 to 700 parts of mixed solvent, wherein the mixed solvent is 2 or 3 of toluene, dimethylbenzene and gasoline. The component B comprises solution of polyisocyanate. Before use, the component B is added into the component A, the components are mixed uniformly (for at least 1 minute), and the adhesive for brushing can be obtained. The adhesive is applicable to hot water-cured lining hard rubber and has big adhesion force.