23 results about "Partial hydrogenation" patented technology

The application discloses a preparation method of a high internal phase emulsion stabilized only by proteins, which mixes a completely hydrated protein solution as a water phase with an oil phase, and controls the hydrodynamic characteristics of a shearing emulsification process to obtain the high internal phase emulsion stabilized only by proteins. The preparation method of the application can obtain the high internal phase emulsion stabilized only by food-grade proteins through one-step shearing emulsification without other measures. The prepared high internal phase emulsion has good gel characteristics, stability and high safety, and can be used as a substitute for partially hydrogenated vegetable oil and saturated fatty acids. Meanwhile, the method is simple in operation, low in preparation cost and suitable for large-scale industrial promotion.

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.

A method of transporting hydrogen may comprise providing hydrogen gas comprising a first hydrogen gas portion produced by a method with no direct carbon emissions to the atmosphere and a second hydrogen gas portion produced by a method with direct carbon emissions to the atmosphere; at a first hydrocarbon processing facility, hydrogenating a hydrocarbon feed in the presence of the hydrogen gas to form a hydrogenated effluent; transporting a portion of the hydrogenated effluent from the first hydrocarbon processing facility to a second hydrocarbon processing facility; and at the second hydrocarbon processing facility, dehydrogenating the portion of the hydrogenated effluent to form a hydrogen gas product. On average, a mass flow rate of the first hydrogen gas portion may be at least 90 % of a mass flow rate of the hydrogen gas product. The first hydrocarbon processing facility and the second hydrocarbon processing facility may be separated by a distance of at least 100 km.

The present invention relates to a fatty acid ester quaternary ammonium salt surfactant obtained by performing an amine esterification reaction and a quaternization reaction of fatty acids, which are obtained through one or more steps selected from the group consisting of decolorization, degumming, partial hydrogenation, fatty acid decomposition, and fatty acid purification of coffee oil extracted from coffee grounds, wherein a structure in which fatty acid residues derived from the coffee grounds are esterified accounts for 45 wt% or greater of 100 wt % of the total cationic surfactant. In addition, the fatty acid ester quaternary ammonium salt comprises 40 wt% or greater of diesterquat and 20 wt% or less of triesterquat, and thus has the advantages of high flexibility, good absorption, and excellent long-term storage stability.

The invention relates to the technical field of waste gas treatment, and discloses a waste gas treatment system for preparing a benzene partial hydrogenation cocatalyst and a preparation method.The waste gas treatment system for preparing the benzene partial hydrogenation cocatalyst comprises a base, a purification barrel is arranged at the top of the base, and a spiral gas inlet pipe is arranged in the purification barrel; a plurality of air outlet holes are spirally formed in 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. According to the waste gas treatment system for preparing the benzene partial hydrogenation cocatalyst, through cooperation of reverse rotation of the vertical cylinder and axial sliding of the liquid storage box, a dynamic three-dimensional spraying area is formed in the purification cylinder. The annular fog curtain covers the total cross section, density distribution, high-speed area high-spraying-speed hedging and low-speed area low-spraying-speed covering are dynamically adjusted along with the waste gas concentration gradient, the capture rate of insoluble VOCs and aerosol is remarkably increased, and the contact blind area of a traditional device is eliminated.

The invention belongs to the technical field of partial hydrogenation reaction production of benzene, and particularly relates to a system and a method for separating DMAC (dimethylacetamide) from benzene hydrogenation circulating benzene. The system for separating DMAC from benzene hydrogenation circulating benzene comprises a benzene hydrogenation reactor, an extractive distillation tower and a water scrubber, a benzene feeding hole and a hydrogen inlet are formed in one side of the benzene hydrogenation reactor, and the benzene feeding hole is connected with a benzene feeding pipeline; a reactant outlet is formed in the other side of the benzene hydrogenation reactor, the reactant outlet is communicated with a material inlet of the extractive distillation tower, a circulating benzene outlet is formed above the extractive distillation tower, and the circulating benzene outlet is communicated with a feeding hole below the water washing tower. The system and the method can replace the traditional benzene hydrogenation rectification separation process; after separation, the content of DMAC in the circulating benzene is zero, DMAC in the circulating benzene is completely removed, and the poisoning phenomenon of the benzene hydrogenation ruthenium-zinc catalyst caused by nitrides is prevented.

The present invention provides a method for preparing a Ru-based catalyst supported by zirconium pillared montmorillonite, which is used in the partial hydrogenation of benzene to cyclohexene. Montmorillonite has a large specific surface area, and zirconium oxide has good hydrophilicity. By combining the excellent properties of the two, zirconium oxide pillared montmorillonite is used to prepare a low-cost, high specific surface area, and highly hydrophilic catalyst carrier. Due to the special layered structure of montmorillonite, the interlayers contain exchangeable cations, which can be absorbed by Ru during the hydrothermal reaction. 3+ The Ru is anchored to the interlayers of montmorillonite during the exchange process, resulting in greater stability compared to impregnation loading. The Ru loading of the catalyst used in this patent is far lower than that of the unsupported Ru-based catalysts commonly used in industry. Furthermore, the raw material montmorillonite is inexpensive and readily available, and the preparation process does not produce a large amount of alkaline wastewater. This method has the advantages of low cost, environmental friendliness, and strong stability.

This invention relates to the field of heat transfer oils and discloses a hydrogenated terphenyl heat transfer oil and its preparation method. The hydrogenated terphenyl heat transfer oil contains cyclohexylbiphenyl, dicyclohexylbenzene, tercyclohexane, and dicyclohexylbenzene. Based on the total amount of the hydrogenated terphenyl heat transfer oil, the content of cyclohexylbiphenyl, dicyclohexylbenzene, tercyclohexane, and dicyclohexylbenzene is not less than 75% by weight, preferably not less than 80% by weight. This invention uses a solid acid catalyst to alkylate biphenyl with cyclohexene and / or cyclohexanol, followed by separation and partial hydrogenation using a hydrogenation catalyst. This results in a high yield of hydrogenated terphenyl, low energy consumption in the preparation process, and the ability to obtain a hydrogenated terphenyl heat transfer oil with a low pour point, which can replace traditional hydrogenated terphenyl products.

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 relates to the technical field of chemical industry, and particularly discloses an organic additive for preparing cyclohexene by partial hydrogenation of benzene, the organic additive contains alcohol, alcohol amine, a surfactant and organic alkali; the mass ratio of the active ingredients is (0.01-10): (0.01-10): (0.01-10) Wherein the surfactant is selected from one or more of polyvinylpyrrolidone, a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, a polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer and alkyl oxyethylene phenol ether; the organic base is one or more of sodium citrate, sodium oxalate, sodium oleate, sodium benzoate and sodium propionate. The organic additive can increase the surface hydrophilicity of the catalyst, is beneficial to desorption of cyclohexene, can prevent the desorbed cyclohexene from being subjected to adsorption hydrogenation again to generate cyclohexane, and improves the yield of cyclohexene.

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.

The application provides a layered composite hydroxide modified zirconium oxide material and a preparation method and application thereof, and belongs to the field of catalyst auxiliary materials. The material is composed of layered composite hydroxide and zirconium oxide, the layer plate of the layered composite hydroxide is composed of divalent metal cations and trivalent metal cations, and the modification amount is 1 / 30-1 / 200 of the mass of zirconium oxide. The material is prepared by combining a colloidal method and an electrostatic self-assembly method, can significantly improve the hydrophilicity of zirconium oxide and the adsorption capacity of ruthenium nanoparticles, and is applied to a benzene partial hydrogenation reaction system for preparing cyclohexene. The material can effectively promote the settlement of noble metal Ru nanoparticles under the premise of maintaining the reaction activity and selectivity, and significantly reduces the loss of Ru. Experiments show that the Ru loss rate can be as low as 1.4% by using the material, which is significantly improved compared with traditional zirconium oxide materials.

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 invention discloses a process for recovering a catalyst for partial hydrogenation of benzene, which comprises the following steps of: sequentially carrying out flash evaporation, phase separation, dehydration, suspension separation and cross-flow membrane separation treatment on reaction feed liquid containing generated oil, water and the catalyst to realize concentration and recovery of the catalyst in the reaction feed liquid. According to the invention, the loss of the catalyst is avoided by adopting a membrane separation technology, and meanwhile, suspension separation and membrane separation are coupled, so that the operation conditions of suspension separation and membrane separation are improved, and the recovery efficiency of the catalyst is improved; in addition, the process has the advantages of small change on the existing production device, small occupied area of equipment, low investment, low operation cost and remarkable economic benefit.

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.

The application provides a preparation method of a novel ruthenium-based catalyst and application of the catalyst in a reaction of partial hydrogenation of benzene to cyclohexene. Thanks to a large amount of mesopores with a size of less than 50 nm in the alumina carrier, the catalyst involved in the application can obtain a catalytic performance of 50-80 (i.e. a conversion rate of 50% and a cyclohexene selectivity of 80%) under low ruthenium, which is much higher than 50-60 of a comparative sample. This can greatly reduce the production cost of catalysis and improve the production efficiency of cyclohexene, thereby providing a certain possibility for subsequent industrial application.

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.

The invention relates to a method for co-producing linalool and tetrahydrolinalool, which comprises the following steps of: 1) dropwise adding dehydrolinalool into a tetrahydrolinalool-catalyst 1, carrying out partial hydrogenation reaction in a reaction kettle 1, and filtering the catalyst 1 to obtain a reaction liquid 1, 2) fully hydrogenating the reaction liquid 1 in a reaction kettle 2-catalyst 2, and filtering the catalyst 2 to obtain a reaction liquid 2, 3) rectifying the reaction liquid 2, the linalool and the tetrahydrolinalool are obtained. The method is provided for co-production of linalool and tetrahydrolinalool, the ratio of linalool to tetrahydrolinalool is adjustable, tetrahydrolinalool is used as a bedding solution in the step 1), introduction of a third substance is avoided, and energy consumption of separation is reduced. Compared with the prior art, the process has the advantages that the reaction heat of tetrahydrolinalool can be reduced, so that the reaction is safer; in addition, the byproduct dehydrolinalool dimer and linalool in the step 1) are hydrated, and the dihydrolinalool can be fully hydrogenated in the step 2) to generate tetrahydrolinalool, so that the utilization rate of the dehydrolinalool is increased.