62results about How to "Increase the degree of hydrogenation" patented technology

The invention relates to a method for producing water-white hydrogenated rosin, which comprises the following steps: using light color refined rosin obtained after purifying the rosin as hydrogenation raw materials, using a solvent for preparing solution, carrying out catalytic hydrogenation, then, separating out the solvent through distillation, and obtaining the water-white hydrogenated rosin. When the method provided by the invention is adopted, the water-white hydrogenated rosin with light color (the Lovibond color number of the yellow color is 0.3 to 1.0, and the Lovibond color number of the red color is 0.2 to 0.3), low iodine value and low abietic acid content can be obtained. Compared with the water-white hydrogenated rosin produced by a traditional method, the water-white hydrogenated rosin produced by the method provided by the invention has the advantages of lighter color, higher hydrogenation degree, better stability and lower cost, and the application value of products can be improved when the water-white hydrogenated rosin is applied to aspects such as electronics, paint, bonding agents, dyestuff and the like.

The invention discloses a high-performance nano magnesium-based hydrogen storage material and a preparation method thereof. The high-performance nano magnesium-based hydrogen storage material is prepared from the following components in percentage by mass: 93-97% of magnesium, and 3-7% of a graphene nickel and palladium supported catalyst. The preparation method for the high-performance nano magnesium-based hydrogen storage material comprises a ball-milling pretreatment step; a hydriding combustion synthesis step and a strong ball-milling after-treatment step. The nano magnesium-based hydrogen storage material prepared by the preparation method has high activity, high capacity and excellent hydrogen absorption and desorption performances.

The invention belongs to the technical field of reactors and provides a reactor for an exothermic reaction to solve the problems of large size of the conventional tubular reactor and nonuniform reaction degree distribution and different heat removing requirement in the conventional tubular reactor. The reactor comprises a heat exchange type tube nest fixed bed section and a heat insulation type fixed bed section; the heat insulation type fixed bed section is positioned at a downstream of the heat exchange type tube nest fixed bed section; and the filling volume ratio of catalysts of the two sections is (0.2-5):1. The reactor can be used for various exothermic reactions such as preparation of isopropamide through acetone ammoniation, preparation of isopropanol through acetone hydrogenation, and preparation of cyclohexane through benzene hydrogenation, and has the advantages that the reactor is small in size and low in cost, processing is easy to realize, and yield can be improved.

A hydrogenation method for a polymer comprising an olefin unsaturated bond is disclosed. The method includes bringing a solution of the polymer comprising the olefin unsaturated bond into contact with hydrogen in reactors under a hydrogenation condition and with the existence of a hydrogenation catalyst. The method is characterized in that the reactors are at least two reactors in series connection, the first reactor is formed by combining a tower reactor or a stirring reactor with a static mixer, materials in the reactors are allowed to be in a near complete mixing state through controlling the recycle ratio of the first reactor, the recycle ratio of the first reactor is 1-40:1, the second and latter reactors are tower reactors, and materials in the second and latter reactors are in a near plug-flow state. The method can allow the hydrogenation degree of the polymer to reach an ideal value stably.

This invention relates to a method for hydrogenating styrene-series thermoplastic elastomer with N2H4.H2O/H2O2/catalyst system. The method comprises: (1) preparing styrene-series thermoplastic elastomer latex; (2) hydrogenating styrene-series thermoplastic elastomer latex with N2H4.H2O/H2O2/catalyst system. The method does not need high-pressure apparatus, compressed H2, noble metal catalyst or a large amount of solvent. The product has hydrogenation degree of 85% and gel content lower than 2%. The method has such advantages as simple process, high stability, high reliability, no pollution and wide applications.

The invention discloses a composite material with nano-nickel particles and nano-palladium particles on graphene and a preparation method of the composite material. According to the composite material, a graphene surface is loaded with the nano-nickel particles and the nano-palladium particles with regular morphology and uniform particle size distribution, wherein the mass percent of graphene is 40%-80%, the mass percent of the nano-nickel particles is 10%-30%, and the mass percent of the nano-palladium particles is 10%-30%. Raw materials for the preparation method are available and lower in cost; the method is simpler and easy to operate. The synthesized composite material with bi-metal nano-nickel particles and nano-palladium particles on graphene not only has excellent characteristics of graphene, but also has excellent catalytic performance of nickel and palladium nanoparticles and can be widely applied to the fields of catalysts, hydrogen storage materials, battery materials, supercapacitors and the like.

The invention provides a coal hydrogenation gasification method. The coal hydrogenation gasification method comprises the following steps: introducing hydrogen into a catalyst to be activated, and generating activated hydrogen; and mixing the activated hydrogen and coal powder to have a gasification reaction. According to the coal hydrogenation gasification method, by virtue of a way of catalytically activating the hydrogen, active hydrogen free radicals are provided for the coal hydrogenation gasification process, and the active hydrogen free radicals are promoted to have a coupling reaction with a coal primary pyrolysis product, so that the hydrogenation degree of the coal primary pyrolysis product can be increased, and the yield of methane and light-weight oil products in the coal hydrogenation gasification product can be increased.

A hydrogenation method for activation of a hydroxy-terminated butyronitrile catalyst belongs to the field of hydrogenation catalysis. Raw hydrogenation materials adopted by the method comprise liquid hydroxy-terminated butyronitrile without any termination protection treatment and liquid hydroxy-terminated butyronitrile using hexamethyldisilazane for termination protection treatment. An activation method of the catalyst mainly comprises the steps of adding organic compounds such as alcohol and ketone as promotors and conducting selective hydrogenation on unsaturated double bonds of a polymer at 80-100 DEG C and 0-5 MPa for 2-12 h. According to the hydrogenation method, few organic compounds such as the alcohol and the ketone are used as the promotors, so that the reactivity of the catalyst is improved effectively, and the hydrogenation degree is increased greatly. In addition, the catalyst consumption required for reaching the same hydrogenation degree is reduced greatly, and the cost is saved significantly. According to the hydrogenation method, the high hydrogenation degree of the liquid hydroxy-terminated butyronitrile without any pretreatment is achieved for the first time, which cannot be achieved by other catalyst systems at present.

The invention relates to a method for preparing hydrogenated natural rubber (HNR) using an emulsion process. The method comprises the following steps: performing hydrogenation modification on natural rubber in natural latex by adopting a hydrazine hydrate/hydrogen peroxide/boric acid catalytic system; and flocculating by using an aqueous solution of 2% CaCl2 and drying, thereby obtaining the HNR with different hydrogenation degrees. According to the catalytic system, NR main chain hydrogenation can be catalyzed in an emulsion state; the gel content and decomposition temperature can be increased along with the increase of the NR hydrogenation degree, and a glass-transition temperature is slightly increased; and the crosslinking density of vulcanized rubber is increased along with the increase of the hydrogenation degree. Therefore, after hydrogenation, the flexibility of the HNR is reduced, and the thermal stability is improved; and the hydrogenation degree is increased, and the crystallization capacity of the HNR is decreased. The hydrogenation of the NR is expected to improve the aging resistance of the rubber.

The invention relates to the field of copolymer hydrogenation, and discloses a hydrogenated block copolymer as well as a preparation method and application thereof. The hydrogenated block copolymer isobtained by hydrogenating a styrene-isoprene block copolymer, and in the styrene-isoprene block copolymer, the content of a styrene segment is 10-90% by weight, and the content of an isoprene segmentis 90-10% by weight; wherein the content of unsaturated C6 rings in the hydrogenated block copolymer is not more than 5wt%, and the content of straight-chain double bonds in the hydrogenated block copolymer is not more than 5wt%. A benzene ring and an isoprene segment in the styrene-isoprene block copolymer have an extremely high hydrogenation degree. The hydrogenated block copolymer has an excellent comprehensive performance. When the hydrogenated block copolymer is used as an optical material, the material is light, thin, transparent and bright; when the hydrogenated block copolymer is usedas a medical material, the material is transparent, pure, safe and reliable; and when the hydrogenated block copolymer is used for preparing a food container, the food container is extremely clean.

Proposed is a process for the continuous hydrogenation of carbon-carbon double bonds in an unsaturated polymer based on a conjugated diolefin and at least one other copolymerizable monomer to produce a hydrogenated polymer, in the presence of a solvent and a homogeneous or heterogeneous catalyst, wherein said unsaturated polymer, said homogeneous or heterogeneous catalyst and hydrogen are passed through a reactor equipped with static internal elements.

The invention provides a ternary catalysis system used for selective hydrogenation of a conjugated diene containing polymer. The ternary catalysis system comprises organic acid nickel, aluminum alkyl and an amino compound. The amino compound in the catalysis system and an organic acid nickel compound firstly form a complex product, and then the complex product and the aluminum alkyl are subjected to ageing processing, so that an optimal quantitative proportion relationship between Ni+ and Ni0 is achieved, and the hydrogenation activity of the catalyst is more stable. By adoption of the ternary catalysis system, the reaction of the conjugated diene containing polymer in the hydrogenation process becomes milder, and the hydrogenation efficiency and the hydrogenation degree of the polymer are finally improved.

The invention discloses a catalyst, comprising a carbon nano-tube and a main active hydrogenation component, wherein in the catalyst, the carbon nano-tube is used as a catalyst carrier carried with the main active hydrogenation component, and the main active hydrogenation component is a conventional metal catalyst for catalytic hydrogenation reaction in the field of hydrogenation reaction. The invention further discloses a preparation method for the catalyst, and a preparation method for the homopolymer or copolymer of cyclohexyl ethylene. In the preparation methods disclosed by the invention, hydrogenation can be performed on the polymer solution of polystyrene or styrene copolymer in certain conditions by selecting special catalyst, thereby obtaining the homopolymer or copolymer of cyclohexyl ethylene.

The present invention discloses an unsaturated copolymer hydrogenation method, which comprises: (1) dissolving a unsaturated copolymer in an organic solvent, and carrying out inflation discharge deaeration; (2) adding a hydrogenation catalyst and a ligand, wherein the hydrogenation catalyst has the following general formula: M1aM2bXmLn; (3) introducing hydrogen, stirring, and carrying out a reaction, wherein the reaction conditions comprise that the reaction temperature is 0-30 DEG C, the hydrogen pressure is 0.05-15 Mpa, and the reaction time is 1-120 min; (4) heating to a temperature of 50-180 DEG C, maintaining the hydrogen pressure at 0.1-15 Mpa, and carrying out a reaction for 1-20 h; and (5) removing the organic solvent in the reaction product obtained in the step (4). With the method of the present invention, the catalyst application cost can be reduced, the reaction is easy to perform, the hydrogenation reaction activity is high, the hydrogenation degree of the hydrogenated product can be significantly improved, and the product does not have the significantly-increased gel content.

The present invention provides a novel process for selectively hydrogenating the carbon-carbon double bonds in diene-based polymers which are present in latex form, this means as a suspension of diene-based polymer particles in an aqueous medium, using a Ruthenium or Osmium-based complex catalyst without any organic solvent.

The present invention relates to a heterogeneous two-component hydrogenation catalyst, a hydrogenated nitrile butadiene rubber, and preparation methods of the heterogeneous two-component hydrogenation catalyst and the hydrogenated nitrile butadiene rubber. The heterogeneous two-component hydrogenation catalyst preparation method specifically comprises: carrying out amino modification on a silica hollow microsphere carrier by using a coupling agent, loading an active component M1 and an auxiliary agent component M2 on the carrier, drying, and carrying out H2 reduction treatment to obtain the heterogeneous two-component hydrogenation catalyst, wherein the active component M1 is selected from Pd or Rh, preferably Pd, and the auxiliary agent component M2 is selected from Zr or Ti, preferably Zr. According to the present invention, the prepared heterogeneous two-component hydrogenation catalyst has advantages of high catalytic activity, high selectivity, good stability, relatively low preparation cost, mild hydrogenation condition, simple process and precious metal consumption reducing; the synthesis cost of the catalyst is effectively reduced by completely using the synergetic effect between the precious metal and the auxiliary agent; and the hydrogenation degree of the hydrogenated nitrile butadiene rubber preparation method is high, and the selectivity can achieve 100%.

The invention relates to the field of copolymer hydrogenation, and discloses a hydrogenated block copolymer as well as a preparation method and application thereof. The hydrogenated block copolymer isobtained by hydrogenating a styrene-butadiene block copolymer, in the styrene-butadiene block copolymer, the content of a styrene segment is 10-90wt%, and the content of a butadiene segment is 90-10wt%; wherein the content of unsaturated C6 rings in the hydrogenated block copolymer is not more than 5wt%, and the content of straight-chain double bonds in the hydrogenated block copolymer is not more than 5wt%. A benzene ring and a butadiene segment in the styrene-butadiene block copolymer have an extremely high hydrogenation degree and excellent comprehensive performance. When the hydrogenatedblock copolymer is used as an optical material, the material is light, thin, transparent and bright; when the hydrogenated block copolymer is used as a medical material, the material is transparent, pure, safe and reliable; and when the hydrogenated block copolymer is used for preparing a food container, the food container is extremely clean.

The invention discloses a medical-grade thermoplastic elastomer industrial production device and production method, wherein the medical-grade thermoplastic elastomer industrial production device comprises a reaction unit, a decatalysis unit, a steam stripping unit and a post-treatment unit, and the medical-grade thermoplastic elastomer industrial production device further comprises a raw material refining unit. The technical process provided by the invention has excellent continuity. Through process integration and control of process parameters, an SEBS product produced by the process has the advantages of easy control of 1,2 butadiene content and molecular weight, narrow molecular weight distribution, high hydrogenation degree, low ash content, bright blending with PP, and no crystal point, and meets the requirements of medical and health-grade SEBS products.