99 results about "Piperylene" patented technology

Provided are elastomeric compositions comprising at least one elastomer and a hydrocarbon polymer additive. Preferably the hydrocarbon polymer additive comprises from 60 to 90% piperylene, from 5 to 15% cyclic components, from 5 to 20% styrenic components, up to 5% isoprene, up to 5% indenic components, and up to 10% amylene. Also provided are elastomeric compositions comprising at least one elastomer and a hydrocarbon polymer additive, wherein the hydrocarbon polymer additive has a molecular weight of from 520 to 650 g/mole and a glass transition temperature (Tg) of from 48 to 53° C. The elastomeric compositions are particularly useful in making tires and other cured rubber articles.

An elastomeric composition incorporating a hydrocarbon polymer modifier including piperylene, cyclic pentadiene and aromatic components, and having a softening point from 80° C. to 160° C., z-average molecular weight greater than 10,000, and at least 1 mole percent aromatic hydrogen, based on the total moles of hydrogen in the modifier. In a method, the elastomeric composition is processed with a cure package into a composition in the desired shape, which is cured to form the article. The modifier may optionally be immiscible with an elastomer in the composition and/or co-cured with the elastomer or filler in the composition. A tire or tire component may include the elastomeric composition.

The invention relates to a method for preparing pentene, which comprises the following steps of: (1) mixing a piperylene-rich C-5 fraction and hydrogen and then the mixture being sent to a fixed bed catalytic hydrogenation reactor for a selective catalytic hydrogenation reaction in the presence of a catalyst Pd/Al2O3, wherein the molar feed ratio of hydrogen to diolefin in the material is 1- 3:1, the weight hourly space velocity is 1-8hr<-1>, the reaction pressure is 10-20bar, and the reaction temperature is 30-90 DEG C, and the piperylene contained in the material is converted into 1-pentene and 2-pentene by hydrogenation; (2) by utilizing the difference in boiling point of each component in the hydrogenated material, separating the 1-pentene in a distillation column with the number of theoretical plates of 80-100 at a bottom temperature of 55-80 DEG C, a top temperature of 40-60 DEG C, a reflux ratio of 10 to 30 and a column operating pressure of 2-5bar; and (3) then sending a bottom liquid to a distillation column with the number of theoretical plates of 80-100 to separate the 2-pentene at a bottom temperature of 62-87 DEG C, a top temperature of 47-67 DEG C, a reflux ratio of 10 to 30 and a column operating pressure of 2-5bar. The method provided by the invention has the advantages that 1-pentene and 2-pentene products with the purity of more than 98.5% can be easily produced by hydrogenation and distillation methods.

The invention provides a catalyst for polymerization of 1,3-pentadiene. The catalyst comprises a trifluoromethanesulfonic acid rare earth complex of which the chemical formula is Ln(CF3SO3)3.xH2O.yL and alkyl aluminum, wherein Ln is a tervalent cation of rare earth element; L is an electron-donating ligand; x is more than 0 and less than or equal to 6; and y is more than or equal to 1 and less than or equal to 4. The molar ratio of the alkyl aluminum to the Ln is (20-60):1. The catalyst can reduce preparation cost and simplify reaction conditions when poly-1,3-pentadiene is prepared; and prepared poly-1,3-pentadiene rubber has good performance. The invention also provides a preparation method for the catalyst for polymerization of the 1,3-pentadiene and a preparation method for the poly-1,3-pentadiene.

Halogen-substituted silica heterocycle piperylene and its production are disclosed. The process is carried out by reacting 2,5-dioctyl silica heterocycle piperylene with dihalide compound to obtain the target product. It can be used for compound with multiple chemical structures and polymer luminescent materials containing silica heterocycle piperylene.

The present disclosure describes processes for producing cyclohexenes using Lewis acidic ionic liquids comprising the steps of providing to a reactor an α,β-unsaturated carbonyl dienophile, providing to the reactor a 1,3-diene, providing a Lewis acidic ionic liquid to the reactor; and reacting the α,β-unsaturated carbonyl dienophile with 1,3-diene to form a substituted cyclohexene product. The α,β-unsaturated carbonyl dienophile can be mesityl oxide, the 1,3-diene can be piperylene; and the Lewis acidic ionic liquid can be AlCl₃:[C₂mim]Cl; AlCl₃:[C₈mim]Cl; or mixtures thereof.

The invention discloses a separation method and a separation system for piperylene and dicyclopentadiene. The system comprises a C5 boil-up tower, a piperylene tower and a dicyclopentadiene tower and is characterized in that a second dimerization reactor is arranged between the C5 boil-up tower and the piperylene tower and a double-ring feeding flash vaporization vessel is arranged before the dicyclopentadiene tower. The separation method comprises the following steps: (1) allowing a C5 fraction having undergone removal of light components to enter into the middle part of the C5 boil-up tower and a tower-top materiel flow to enter into the second dimerization reactor, delivering a reacted material to the piperylene tower, carrying out gas-phase side-draw at the lower part of the piperylene tower so as to recover a piperylene product and returning a material obtained at the bottom of the piperylene tower to a C5 removing tower as a feed; and (2) recovering a material from the bottom of the C5 boil-up tower, allowing the material to enter into the flash vaporization vessel, allowing material flows obtained at the top and the bottom of the flash vaporization vessel to respectively enter into the upper part and the lower part of the dicyclopentadiene tower and carrying out side-draw at the dicyclopentadiene tower to recover a dicyclopentadiene product. With the system and the method provided by the invention, the purity and the color of piperylene and dicyclopentadiene can be improved, and economic benefits of equipment are enhanced.

A ternary V—Ti—P mixed oxide is shown to catalytically dehydrate 2-methyl-tetrahydrofuran in high conversion to give piperylene, in good yield. Volatile products collected from this reaction contain piperylene in concentrations as high as 80 percent by weight. Dehydration of glycerol to acrolein in high conversion and moderate selectivity is also demonstrated. The catalyst is also shown to dehydrate other alcohols and ether substrates. The catalyst is resistant to deactivation and maintains activity between runs.

The invention discloses a piperylene separation method. According to the invention, piperylene is separated through azeotropic rectification. An azeotropic material flow is introduced into a fed material of a piperylene tower. The azeotropic material flow comprises n-pentane and 2-methyl-2-butene. Flow ratio of the azeotropic material flow to a C5 removing tower top recovered material flow is 0.01-1. The two are mixed and are delivered into the piperylene tower. With the method provided by the invention, piperylene product purity is improved, equipment investment is reduced, and operation cost is reduced.

The invention provides a trans-rubber fiber material. The trans-rubber is selected from one or more of trans-1, 4-polyisoprene, trans-1, 4-polybutadiene, trans-1, 4-butadiene-isoprene copolymerization rubber, trans-1, 4-butadiene-piperylene copolymerization rubber, trans-1, 4-polydiolefin rubber alloy and trans-1, 4-alkadiene homopolymer and/or homopolymer epoxidation or chlorination modified derivatives and derivatives. The diameter of the trans-rubber is in a range of 100nm to 10 microns. The invention further provides a preparation method and applications of the trans-rubber fiber material. The trans-rubber fiber material has the advantages of being fine in diameter, low in weight, large in specific surface area, large in porosity, small in mass-to-volume ratio, capable of maintaining good fiber morphology after being put for a period and free of fiber dissolving and deformation of other fibers in the prior art.

Use of fatty acids produced from a complex mixture of natural occurring oils & fats and/or of triglycerides deriving from said complex mixture as the feedstock of a steamcracker, by mixing the fatty acids with steam in a steam/feedstock ratio of at least 0.2 kg per kg, a coil outlet temperature of at least 700° C. and an coil outlet pressure of at least 1.2 bara in order to obtain cracking products including bio-ethylene, bio-propylene, bio-butadiene, bio-isoprene, bio-cyclopentadiene and bio-piperylenes, bio-benzene, bio-toluene, bio-xylene and bio-gasoline.

The invention relates to a C5 diolefin auto-agglutination or copolymerization inhibition method in C5 fraction separation process of petroleum, a polymerization inhibitor is added into a C5 fraction material, the polymerization inhibitor in the C5 fraction material is maintained at a certain amount, the polymerization inhibitor comprises component A N, N-diethylhydroxylamine, component B N,N'-di-sec-butyl-1,4-phenylenediamine and component C succinimide, the weight ratio of component A to component B to component C is (0.1-3):1-3 :0.1-3, and taking the total amount of the component A, component B and component C as a reference, the polymerization inhibitor in the C5 fraction material is maintained at the amount of 20-600ppm; the polymerization inhibitor used in the method is good in polymerization inhibition effect and good in versatility, a big difference in the boiling point between each component and solvent and isoprene, cyclopentadiene (or dicyclopentadiene), piperylene and other diolefins in C5 fraction is existed, so that the components and solvents can be separated in the separation process without further increase of a separation process.

The invention relates to a preparation method of a Fe/Mo-Al2O3 catalyst and a method of synthesizing leaf alcohol by virtue of piperylene. The method comprises the following steps: with Fe/Mo as the active component, gamma-Al2O3 as a carrier and formaldehyde or acetaldehyde as a solvent, under the conditions of heating and stirring, catalytically synthesizing 2-methyl-5,6-dihydropyran; and converting 2-methyl-5,6-dihydropyran into the leaf alcohol under the catalysis of alkali metal and amine. According to the method disclosed by the invention, Fe/Mo-Al2O3 is firstly adopted as a catalyst for synthesizing 2-methyl-5,6-dihydropyran through piperylene; according to the process for catalyzed synthesis of 2-methyl-5,6-dihydropyran, conditions are mild, and the equipment requirements are low; Diels-Alder reaction is carried out on piperylene under the action of the catalyst without changing the catalyst; 2-methyl-5,6-dihydropyran, serving as a synthetic intermediate, is subjected to reaction under the catalysis of alkali metal and amine to easily produce leaf alcohol serving as a target product, and purity and yield are high.

The invention discloses an acid modification C5 petroleum resin and a molecular weight controllable preparation. The preparation method comprises the following steps that a decyclization C5 compound,piperylene, recycled piperylene, monoolefine, styrene, styrene derivatives thereof and other substances are accurately weighed according to the certain proportional relation and dissolved into solventnaphtha, then, the mixture is added into a cold polymerization reaction kettle and stirred to be uniform, the polymerization reaction temperature is controlled to be 45-80 DEG C, the reaction time iscontrolled within 0.5-4 h, and basic resin is prepared after polymerization; finally, a final acid modification petroleum resin product is obtained through the grafting technology performed on the basic resin. By blending the contents of material components in reaction materials, the molecular weight of the basic resin is regulated, then, on the basis of the grafting technology, accordingly, themolecular weight of petroleum resin can be controlled finally, and the regulating range is wide.

The invention discloses a method for improving the performance of a petroleum resin product. The method comprises the steps of performing cationic polymerization to obtain a polymerization solution by using pentane as a solvent, aluminium trichloride as a solvent and monoolefine and piperylene as raw materials; performing alkali washing and water washing to inactivate the catalyst and remove the catalyst and other impurities; then performing normal and reduced pressure steam stripping to remove the pentane solvent and oligomers; and adding a modifier, then granulating and packaging, wherein the modifier is polyisobutene maleic anhydride. By adopting the method for improving the performance of the petroleum resin product, the weather tolerance, pollution resistance, levelling property, adhesion and the like of the product obtained by adding the maleic anhydride modifier in the process of serving as a hot-melt traffic coating are better than those of a traffic coating without the modifier.

Making suitable nonwoven webs requires good adhesion between the binder and the absorbent material. The present invention relates to a nonwoven web having improved adhesion based on tackifiers present in the binder. Optionally, the binder with tackifier may also contain an adhesion promoter, usually grafted polyolefins, and an enhancement agent, usually inactive inorganic compounds in powder form. The web comprises from about 5 to about 25% by weight binder fiber and from about 75 to 95% by weight absorbent. The absorbent may be a natural absorbent or a super absorbent polymer or a combination of these. The binder fiber contains less than about 40% by weight tackifier. Tackifier is selected from the class of rosin, rosin esters, terpene based, piperylene based, and hydrocarbon based compounds.

The invention provides high-strength self-healing concrete, the high-strength self-healing concrete is prepared from the following raw materials in parts by weight: 100-120 parts of Portland cement, 30-50 parts of water, 10-20 parts of carbon dioxide foaming agents, 20-30 parts of dispersing agents, 55-65 parts of aggregates, 20-30 parts of microbial composites, 20-30 parts of modified fiber compound, 1-3 parts of phenol antioxidants, 1-3 parts of octadecanoic acid and 4-8 parts of modified piperylene petroleum resin, the high-strength self-healing concrete has the advantages that through specific proportions and a specific preparation method, fracture strength and compressive strength are improved to a certain extent, the self-healing capability of the concrete is enhanced, repair time ofthe concrete is prolonged, high durability and compactness are realized, and the strength reversion rate of the repaired concrete is high; in view of the embodiment and proportions, components of thehigh-strength self-healing concrete have synergistic effects, the fracture strength and the compressive strength of the concrete are decreased obviously when some components are replaced, and the reversion rate is reduced obviously.

The invention discloses a method for preparing polymer-grade piperylene. The method mainly comprises the following processes: 1) crude piperylene obtained by separation of a C5 fraction which is a byproduct of petroleum cracking for preparation of ethylene enters a first extractive distillation column to undergo extractive distillation, mixed materials rich in cyclopentene and cyclopentane are obtained at the top of the column, and materials rich in piperylene and an extraction agent are obtained at the bottom of the column; 2) the materials at the bottom of the column in the step 1) enter a first stripping column to remove a solvent, an extraction agent is obtained at the bottom of the column, and the extraction agent returns back to a first extraction column for recycling; 3) materials at the top of the column in the step 2) enter a dipolymer reactor to undergo a polymerization reaction, a dimerization reaction liquid enters a heavies removing column to undergo refining, heavy components such as dicyclopentadiene and the like are obtained at the bottom of the column, and materials rich in piperylene are obtained at the top of the column; 4) the materials at the top of the column in the step 3) enter a second extractive distillation column to undergo secondary extractive distillation, and a polymer-grade piperylene product is obtained at the top of the column; and 5) the materials at the bottom of the column in the step 4) enter a secondary stripping column to recover a solvent, an extraction agent is obtained at the bottom of the column, and the extraction agent returns back to a secondary extraction column for recycling.

The invention provides a resin composition for an ultraviolet curable adhesive and an adhesive. The resin composition contains a urethane(meth)acrylate resin (A) which is obtained by reaction of a polyol (a), a polyisocyanate (b) and a (meth)acrylic compound (c) containing a hydroxyl group, a (meth)acrylic monomer (B), a photopolymerization initiator (C) and an adhesion imparting agent (D), wherein the adhesion imparting agent (D) is obtained by reaction of more than one unsaturated aromatic compound (d-1) selected the group consisting of a styrene, an alpha-methyl styrene, a vinyl toluene, an indene and an isopropenyl toluene, and more than one unsaturated aliphatic compound (d-2) selected from a group consisting of an isobutylene, an butadiene, an isoprene, an piperylene and an dicyclopentadiene.

The invention belongs to the technical field of polymer synthesis, and specifically discloses a preparation method of a butadiene/1,3-pentadiene random copolymer. According to the preparation method, in the absence of water and oxygen, an organic alkali metal initiator is adopted, a randomization additive is added, butadiene and 1,3-pentadiene carry out copolymerization reactions to obtain the butadiene/1,3-pentadiene random copolymer, the mass ratio of butadiene to 1,3-pentadiene is 1:9-6:4, the reaction temperature is 0 to 100 DEG C, and the reaction time is 1 to 24 hours. The results show that the prepared butadiene/1,3-pentadiene random copolymer has the advantages of controllable molecular weight, adjustable molecular weight distribution, high randomization degree, controllable microscopic polymer structure, low glass-transition temperature (Tg=-70 to -40 DEG C), quick reaction rate, and high monomer conversion rate (100%).