11 results about "Partial hydrogenation" patented technology

The present disclosure relates to a rubber composition and a method of preparing the same, the rubber composition comprising a viscosity modifier and a modified polymer having a structure in which a molecular weight regulator is coupled to at least one of both ends of an at least partially hydrogenated or non-hydrogenated petroleum resin. The rubber composition according to the present disclosure has improved processability and thus may replace process oil, and may markedly improve gas impermeability.

The invention relates to a partially hydrogenated cycloolefin polymer as well as preparation and application thereof, and the partially hydrogenated cycloolefin polymer is prepared by the following steps: carrying out metathesis ring-opening polymerization on an alkene monomer containing at least two ring structures to obtain a cycloolefin polymer, and then carrying out hydrotreating until the hydrogenation ratio is 20-80%. Compared with the prior art, the method has the advantages that the phase difference film with high added value can be directly prepared from petrochemical products such as styrene and butadiene, a monomer redesign synthesis stage is not needed, the hydrogenation rate does not need to reach 100% in the hydrogenation process, and the method has the cost advantage in the aspects of raw materials and the production process.

The invention relates to a rubber compound containing at least the following components, as well as its vulcanizate and its use in vehicle tires: a) 10 to 20 phr of polyisoprene selected from natural and synthetic polyisoprene, b) 80 to 90 phr of at least one diene rubber selected from butadiene rubber and styrene-butadiene rubber, wherein 60 to 70 phr of the diene rubber is partially hydrogenated, wherein the degree of hydrogenation, i.e., the proportion of the original double bonds of the partially hydrogenated diene rubber that have been fully hydrogenated, is 50 to 90%.

The invention discloses a stain-resistant and wet-skid-resistant material with a low linear expansion coefficient as well as a preparation method and application thereof, and belongs to the field of thermoplastic vulcanized elastomers. According to the invention, a partially hydrogenated styrene-conjugated diene-styrene block copolymer is used as a dispersion phase and is mixed with continuous phase poly-1-butene, a softening agent blended by paraffin oil and polyisobutene is matched, other functional aids are added, and a chemical reaction is carried out through a vulcanizing agent and an auxiliary vulcanizing agent; and carrying out dynamic vulcanization under the shearing action of a screw rod to prepare the material with low linear expansion coefficient, stain resistance and wet skid resistance. The prepared material is a thermoplastic elastomer, the linear expansion coefficient of the thermoplastic elastomer is effectively reduced, dust and stain adhesion is weak, when the thermoplastic elastomer is in contact with a wet and slippery sole surface after being subjected to injection molding to form a floor structure, a continuous rubber-phase soft section can generate large deformation and is tightly attached to the microscopic contour of the sole surface, and a huge real contact area is generated; therefore, high frictional resistance is obtained, and the wet skid resistance of the floor is improved.

A composition comprising at least the following components: a) an ethylene / alpha-olefin interpolymer having the following properties: i) a melt index (I2) of < = 10 dg / min, ii) a density of from 0.855 g / cc to 0.895 g / cc; b) a partially hydrogenated rosin ester tackifier.

The application discloses a device for dynamically separating oil and water and partially hydrogenating benzene into cyclohexene and a method thereof. The device comprises a reaction unit and a catalyst recovery unit connected in sequence. The reaction unit is composed of multiple series-connected reaction kettles. The catalyst recovery unit comprises a water washing tank, a flash tank, an evaporation kettle, an evaporation water tank and a condenser. After benzene, hydrogen and zinc sulfate aqueous solution containing catalysts pass through the multiple series-connected reaction kettles, oil and water are separated in the water washing tank, the oil phase is sent out of the system after water washing, the water phase flows out from the bottom of the water washing tank, part of the water phase is returned to the reaction kettle, and the other part is sequentially introduced into the flash tank and the evaporation kettle and then returned to the reaction kettle. The cyclohexene preparation method based on the device can greatly reduce the consumption of catalysts and zinc sulfate.

The invention relates to a partially hydrogenated cyclic block copolymer as well as preparation and application thereof. The partially hydrogenated cyclic block copolymer is obtained by hydrotreating a cyclic block copolymer until the hydrogenation ratio is 20-80%. Compared with the prior art, the method has the advantages that the SBS particles with the cost advantage can be directly used for preparing the phase difference film with the high additional value, a monomer redesign synthesis stage is not needed, the hydrogenation rate does not need to reach 100% in the hydrogenation process, and the method has the cost advantage in the aspects of raw materials and the production technology.

The utility model provides a process system for preparing cyclohexanol by partial hydrogenation of benzene, which comprises a system for preparing cyclohexene by partial hydrogenation of benzene, the system comprises a benzene tank, a dehydration system and a benzene desulfurization system, the dehydration system comprises a water absorption device, a water absorption saturation feedback device and a dehydrating agent regeneration device, an outlet of the benzene tank is connected with a feed port pipeline of the water absorption device, and an outlet of the benzene tank is connected with a feed port pipeline of the benzene desulfurization system. A discharge port of the water absorption device is connected with an inlet pipeline of the benzene desulfurization system, and a water absorption saturation feedback device is arranged on the pipeline for connecting the discharge port and the inlet pipeline; and a regeneration port of the water absorption device is communicated with the dehydrating agent regeneration device. Before benzene enters the benzene desulfurization system, the raw material benzene is dehydrated through the water absorption device, so that the problems that the service cycle of a benzene desulfurization catalyst is influenced and a noble metal catalyst of a benzene partial hydrogenation system is poisoned due to the fact that a filter is blocked when water carried by benzene enters the benzene desulfurization system are effectively solved; therefore, indirect economic loss caused by output reduction and direct economic loss caused by inactivation of the noble metal catalyst are indirectly avoided.

This invention provides a method for producing high-purity 3-methyl-1-penten-3-ol through a water washing and reuse process. Using 3-methyl-1-pentyn-3-ol as a raw material, partial hydrogenation is performed using a catalyst, controlling the incomplete conversion of the raw material (conversion rate ≤98%) to significantly reduce the formation of the over-hydrogenation byproduct 3-methyl-3-pentanol. Then, the partially hydrogenated reaction solution is treated with water washing to extract the incompletely converted 3-methyl-1-pentyn-3-ol to the aqueous phase, which is then returned to the acetylation process. Finally, the water-washed reaction solution is distilled to obtain high-purity 3-methyl-1-penten-3-ol. This invention is novel in its approach. By controlling the incomplete conversion of the raw material in the partial hydrogenation reaction, the formation of over-hydrogenation byproducts is reduced, thereby improving reaction selectivity and atom utilization. Furthermore, utilizing the slightly water-soluble nature of the reactant 3-methyl-1-pentyn-3-ol, the water washing method achieves a simple and efficient separation of the raw material and product. The separated raw material is directly returned to the acetylation process for recycling, without generating additional waste.

The application relates to the technical field of waste gas treatment, and discloses a waste gas treatment system for preparing a benzene partial hydrogenation auxiliary catalyst and a preparation method, wherein the waste gas treatment system for preparing the benzene partial hydrogenation auxiliary catalyst comprises a base, the top of the base is provided with a purification cylinder, a spiral air inlet pipe is arranged in the purification cylinder, a plurality of air outlet holes are arranged in a spiral shape on the spiral air inlet pipe, an exhaust pipe is arranged on the purification cylinder, an exhaust fan is arranged on the inner side of the exhaust pipe, a liquid outlet pipe is further arranged on the purification cylinder, and a valve is arranged on the liquid outlet pipe. The waste gas treatment system for preparing the benzene partial hydrogenation auxiliary catalyst is characterized in that the vertical cylinder is reversely rotated and cooperates with the axial sliding of the liquid storage box to form a dynamic three-dimensional spraying area in the purification cylinder. The annular mist curtain covers the whole cross section and dynamically adjusts the dense and sparse distribution according to the waste gas concentration gradient; the high-speed area is high in spraying speed and is subjected to a head-on collision, and the low-speed area is low in spraying speed and is covered, so that the capture rate of the insoluble VOCs and the aerosol is obviously improved, and the contact blind area of the traditional device is eliminated.