696 results about "Cyclopentene" patented technology

Saturated and unsaturated compounds having sweet, salt or umami taste enhancement qualities. The compounds have the structure:

where R¹═H or methyl;

• R² is selected from the group consisting of H, C1-C4 alkyl, alkenyl and methylene;
• R³ is selected from the group consisting of H, C1-C8 straight or branched chain alkyl, alkenyl, dienalkyl or phenyl;
• or if R¹═H, R² and R³ taken together can represent

cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, or cyclohexenyl;

R⁴ is selected from the group consisting of H, methyl and ethyl;

R⁵ is selected from the group consisting of H, methyl and ethyl;

R⁶ is selected from the group consisting of H, C1-C9 straight or branched chain alkyl, alkenyl, alkyldienyl, acyclic or containing no more than one ring;

with the proviso that in structure 1 when R⁴ is H or Me; and

R⁵═H or methyl, R⁶ may be selected from the group described above or phenyl.

The invention discloses an essence for a cigarette blasting bead and application thereof. The essence comprises the following components: 2,3-dimethylpyrazine, clove bud oil, lactic acid, ethyl maltol, ethyl cyclopentene alcohol ketone, vanillin, 2,6-syringol and medium chain triglyceride (MCT). The essence 15-20 mu l is wrapped in a capsule in the manner of injection perfuming and then is put into a middle part of a filter tip of a cigarette. The essence for the cigarette blasting bead has bake, coke and sweet flavor fully coordinated with the cigarette smoke flavor feature and is accompanied with slight flowery flavor. The essence applied to the cigarette blasting bead can obviously increase the smoke flavor quality, reinforce the satiated feel and richness of the smoke and reduce the sensory stimuli of the smoke.

The invention relates to a metal-organic framework supported heteropoly acid catalyst for synthesizing glutaraldehyde and a production method of the metal-organic framework supported heteropoly acid catalyst. The catalyst is prepared by a one-step synthesis method, namely a heteropoly acid component with catalytic oxidation activity is introduced into a duct of a metal-organic framework material UiO-66 in the process of synthesizing the metal-organic framework material UiO-66. The catalyst has the characteristics that the catalyst has a crystal framework structure, the active component is highly dispersed, and the heteropoly acid is over-high in load. The catalyst is applied to catalytic selective oxidation reaction of cyclopentene, so that the selectivity and the yield of the glutaraldehyde is greatly improved; the numerical value is much higher than the reported homogeneous catalysis level; and the metal-organic framework supported heteropoly acid catalyst has important industrial application value.

The invention discloses a tobacco component additive to compensate the perfume of low-tar cigarette, which comprises the following parts: 0. 1-2kg tobacco extract, 0-10g furfural, 1-5g 5-methyl-furfural, 1-10g 3-ethyl-2-hydroxy-cyclopentene-1-ketone, 1-10g hexadecyl methyl ester, 1-10g solanestone, 0-10g kiwi fruit lactone dihydroxide, 1-10g calicotone, 1-20g hugebean alkatrientone, 0-10g pyridine, 0-10g 2-methyl-pyridine, 0-100g acetic acid, 0-10g propionic acid, 0-10g benzene carbonic acid, 0-100g benzene carbonic acid, wherein the weight of the raw materials is 1-4 times as diluent. The invention uses tobacco extract and tobacco perfume material as raw material to improve the perfume content of low-tar cigarette, which has good harmonization with tobacco under convenient preparing method and wide resource of raw material.

The present invention relates to novel compounds having sweet, salt or umami taste enhancement qualities. These compounds have the structure:

• where R¹ is H or methyl;
• R² is selected from the group consisting of H, C1-C4 alkyl, alkenyl;
• R³ is selected from the group consisting of H, phenyl, C1-C10 straight or branched chain alkyl, alkenyl, alkynyl, alkyldienyl, acyclic or containing no more than one ring, which contains no more than a total of five heteroatoms selected from F, O, S, N, and P; and if R¹=H, R² and R³ taken together can represent

cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, or cyclohexenyl, which contains no more than two of each heteroatom selected from N, O, and S;

or if R¹, R² and R³ taken together can represent one, or two aromatic rings, which contain no more than three of each heteroatom selected from F, N, S, and O.

R⁴ is selected from the group consisting of H, methyl or ethyl;

R⁵ is selected from the group consisting of H, methyl and ethyl;

R⁶ is selected from the group consisting of H, C1-C9 straight or branched chain alkyl, alkenyl, alkyldienyl, acyclic or containing no more than one ring;

except for in the case of structure 1 when if R⁴=H or methyl and R⁵=H or methyl, R⁶ as described above and phenyl;

or when R⁴, R⁵, and R⁶ taken together can be equal to

R⁷ is selected from the group consisting C1-C4 alkyl, or alkenyl.

This invention is a making and refining method of cyclopentanol, which includes: 1) the materials comprises cyclopentene, phenylic acid solvent, water activator continuously pass through catalyst fixed bed to carry out hydration reaction, and the volume space velocity is 2-15hr to the power -1, the mole ratio of cyclopentene and water is 0.8-5.0, the weight ratio of phenylic acid and cycloamylene is 0.5-1.0. the intensity of activator is 0.01-0.2wt%, the reaction temperature is 130-180deg.C, the reaction pressure is 1.0-3.0MPa, the catalyst is strong acid cation exchange resin with sulfo group anchored on the surface, and the activating solvent is trialkylamine; 2)the reacted materials cool to house temperature and demix into oil phase and aqueous phase, the oil phase materials through continuous distilling separation procedure get non-reacting cycloamylene, refined cyclopentanol and phenylic acid full of solvent. The strong points of this invention are that the conversion of cyclopentene and selectivity of cyclopentanol are high, and the refining of cyclopentanol is simple and low energy consumption.

The invention discloses a formula of tobacco flavoring essence with sweet essence. According to the formula, the tobacco flavoring essence consists of the following components in percentage by mass: 1.0 to 4.0 percent of ethyl maltol, 2.0 to 3.0 percent of plum extractum, 1.0 to 2.0 percent of phenethyl ethanol, 0.01 to 0.1 percent of damascenone, 0.1 to 0.5 percent of phenylacetic acid ethylester, 0.5 to 1.0 percent of methyl cyclopentenotone, 2.0 to 5.0 percent of red date extractum, 0.01 to 0.03 percent of linalool, 0.02 to 0.08 percent of 5-methylfurfural, 0.1 to 0.5 percent of benzoic acid, 0.05 to 0.15 percent of beta-irisone, 0.02 to 0.08 percent of 4-guaethol, 15 to 25 percent of glycerol, 45 to 55 percent of propylene glycol and 3 to 15 percent of purified water. By the formula, tobacco produces sweet fragrance, tobacco fragrance can be increased and taste of the tobacco can be adjusted, so that the taste of the tobacco is improved, the natural sweet fragrance of the tobacco is enhanced and dry, astringent and bitter mouthfeel of customers is improved and requirements of the customers are met.

A novel multi-phase W-contained catalyst for preparing glutaraldehyde by using the aqueous solution of hydrogen peroxide as oxidizing agent to selectively oxidize cyclopentene is prepared through in-situ introducing tungsten oxide in the process for synthesizing SBA-1.5 full-silicon mesoporous molecular sieve. Its advantages are high dispersity of active component, ultrahigh load capacity of tungesten oxide, and high selectivity.

The invention relates to ethylene propylene diene monomer and a preparation method thereof. The ethylene propylene diene monomer comprises 30 to 70%(mol) of ethylene. A third monomer is a liquid low-molecular weight copolymer obtained by copolymerization of cyclopentene and dicyclopentadiene. The ethylene propylene diene monomer comprises 0.5 to 12%(mol) of the third monomer. The third monomer liquid low-molecular weight copolymer of cyclopentene and dicyclopentadiene is a liquid low-molecular weight copolymer containing different double bond structures and having different double bond contents and comprises 3 to 30%(wt) of dicyclopentadiene. The preparation method of the liquid low-molecular weight copolymer has simple processes and a low cost. The liquid low-molecular weight copolymer has no pollution on the environment, an adjustable molecular weight and good dissolvability in a hydrocarbon solvent. The ethylene propylene diene monomer obtained by the preparation method has good sulfuration performances, can be sulfurated by sulphur, has a sulfuration rate close to a sulfuration rate of butadiene styrene rubber, and has good processing performances. The ethylene propylene diene monomer can be widely used for automobile parts, building materials, wires and cables, heat-resistant rubber pipes, high-grade seal pipes and polyolefin modification.

The invention discloses a tobacco perfume compensator and application for low-tar filter tip bar, which comprises the following parts: tobacco extract, 5-methyl-furfural, 3-ethyl-2-hydroxy-2-cyclopentene-1-ketone, hexadecyl methyl ester, solanestone, calicotone, hugebean alkatrientone. The invention can be added into tobacco to reduce tar content of tar effectively with simple making technique and low cost as common filter bar of cigarette.

The invention discloses a method for preparing cyclopentanol by hydrating cyclopentene. The method comprises the following steps: (1) performing addition reaction on cyclopentene and acetic acid under the action of modified sulfonic acid group cation exchange resin to produce cyclopentyl acetate, wherein the modified sulfonic acid group cation exchange resin is prepared by soaking the conventional sulfonic acid group cation exchange resin with methylbenzene and methyl isobutyl ketone sequentially; (2) enabling the material obtained in the step (1) to enter a rectifying tower, forming azeotrope with water on the lower part of the rectifying tower, performing hydrolysis reaction on the material and water under the action of a sulfonic acid group cation exchange resin catalyst filling the upper part of the rectifying tower, withdrawing a product cyclopentanol from the top of the tower and withdrawing acetic acid from the bottom of the tower. The method has the advantages of simple technical process, low energy consumption, high conversion rate, high selectivity, high product yield and the like.

The invention discloses a Pd-Ni/Al2O3 catalyst, its preparation method and an application thereof. With PdCl2 and Ni(NO3)2 being used as active components and Al2O3.H2O being used as a catalyst carrier, the Pd-Ni/Al2O3 catalyst is prepared by loading the active components onto the catalyst carrier, wherein the gross mass of PdCl2 and Ni(NO3)2 is 0.5-1 wt% of the weight of Al2O3.H2O and the mass ratio of Pd to Ni in the active components is 1:0.5-3. The Pd-Ni/Al2O3 catalyst can be used as a selective catalyst in cyclopentadiene selective hydrogenation for synthesis of cyclopentene. By the adoption of the catalyst, hydrogenation reaction can be conducted at normal temperature; the reaction condition is mild; conversion rate and selectivity are very good; the conversion rate is 98-99.5%; and the selectivity of cyclopentene also reaches 97-98.5%.

A hydrosilation process comprising contacting a silicon hydride with an unsaturated reactant in the presence of a platinum catalyst supported on porous aluminum oxide having an acidity of pH 2 to 7. The process is particularly useful for the hydrosilation of unsaturated reactants where the unsaturation is in the internal portion of the reactant's structure, for example, as in cyclopentene and cyclohexene.

Nano-porous low dielectric constant films are deposited utilizing materials having reactive by-products readily removed from a processing chamber by plasma cleaning. In accordance with one embodiment, an oxidizable silicon containing compound is reacted with an oxidizable non-silicon component having thermally labile groups, in a reactive oxygen ambient and in the presence of a plasma. The deposited silicon oxide film is annealed to form dispersed microscopic voids or pores that remain in the nano-porous silicon. Oxidizable non-silicon components with thermally labile groups that leave by-products readily removed from the chamber, include but are not limited to, limonene, carene, cymene, fenchone, vinyl acetate, methyl methacrylate, ethyl vinyl ether, tetrahydrofuran, furan, 2,5 Norbornadiene, cyclopentene, cyclopentene oxide, methyl cyclopentene, 2-cyclopentene-1-one, and 1-butene.

The continuous cyclopentadiene hydrogenating process to prepare cyclopentene is one continuous catalytic hydrogenation reaction of the mixture of cyclopentadiene, solvent and hydrogen in a fixed bed catalyst bed. The catalyst includes gamma-Al2O3 as carrier and Pa as active component. The solvent is any one of benzene, toluene, cyclohexane, ethanol, methanol, tertiary amyl alcohol and tertiary butyl alcohol. The molar ratio between cyclopentadiene and hydrogen is 1 to 1.5-3.5, and the reaction system has pressure of 0.9-1.5 MPa and temperature of 30-55 deg.c. The reacted liquid is discharged partially and externally circulated partially with the weight ratio being 1 to 6-12, and the externally circulated liquid after being cooled is mixed with cyclopentadiene material and solvent before being mixed with hydrogen in venturi ejector, atomized into gas-liquid mixture and reacted in the catalyst bed. The catalyst load is 4-7/hr accounted in liquid phase material, and the reacted heat is transferred via external circulation.

Sulfurized olefin compositions and components are prepared from sulfurizing high methylvinylidene polyisobutylene(s) having at least 25% methylvinylidene and a number average molecular weight in the range of about 120 to about 600, at suitable temperatures and pressures. The resulting sulfurized reaction product and polyisobutyl-1,2-dithiole-4-cyclopentene-3-thione compounds and derivatives are useful in lubricating oils.

The invention discloses a method for preparing cyclopentene/cyclohexene-1-boronic acid pinacol ester. The method comprises the step of carrying out coupling reaction on 1-chlorine-cyclopentene/cyclohexene serving as a raw material in an organic solvent A in the presence of monophosphate ligand and a palladium catalyst based on potassium acetate as alkali so as to prepare the cyclopentene/cyclohexene-1-boronic acid pinacol ester. The method is characterized in that the physicochemical reaction at the n-butyllithium and ultralow temperature condition in the literature is avoided, and the palladium catalyst is adopted for catalyzing, so that the amount of the used catalyst is reduced, and the cyclopentene/cyclohexene-1-boronic acid pinacol ester can be prepared in relatively high yield at the acceptable temperature; the boronizing agent n-butyllithium/isopropoxy boronic acid pinacol ester system is replaced by the boronizing agent palladium catalyst/bis(pinacolato)diboron system, and therefore, the cost of the raw materials is greatly reduced, the reaction condition is relatively easy to realize, amplification is easy, and the technical operation is simpler and more convenient.

The present invention belongs to the field of chemical technology, and is a kind of supported tungstic acid catalyst for multiphase catalytic oxidation and synthesis of glutar aldehyde from cyclopentene. The catalyst has TiO2 microball of unique structure synthesized through homogeneous alcohol-hydrothermal process as the carrier and WO3, prepared with ammonium tungstate/tungstic acid and assistant and through dissolving in water, adding TiO2 microball, evaporation, stoving, roasting, activating and other steps, on the TiO2 carrier. The WO3/TiO2 catalyst has very high gluter aldehyde selectivity and yield and extremely high industrial application value.

There is provided a ring-opening polymer of cyclopentene wherein a cis ratio of cyclopentene-derived structural units is 30% or more, the weight average molecular weight (Mw) is 100,000 to 1,000,000, and an oxysilyl group is included at an end of the polymer chain. For example, the ring-opening polymer of cyclopentene can be obtained by ring opening polymerization of cyclopentene in the presence of a compound of a transition metal belonging to Group 6 in the Periodic Table, an organoaluminum compound represented by the following general formula (1), and an olefinically unsaturated hydrocarbon containing an oxysilyl group.

(R¹)_3-xAl(OR²)_x  (1)

(in the general formula (1), R¹ and R² represent a hydrocarbon group having 1 to 20 carbon atoms and x satisfies the requirement 0<x<3.)

The invention relates to a method for preparing cyclopentanol from cyclopentene through an indirect hydration method. The method comprises steps that: liquid phase cyclopentene and acetic acid are subject to an addition reaction with a fixed-bed catalyst, such that cyclopentyl acetate is obtained, wherein the catalyst is sulfonic cation exchange resin with a mass exchange capacity of 3-5.5mmol/g;the product of the addition reaction is processed through rectification separation, such that refined cyclopentyl acetate is obtained; the refined cyclopentyl acetate is subject to an ester exchange reaction with methanol under the existence of a catalyst CaO, such that cyclopentanol and methyl acetate are produced; the produced methyl acetate is removed during the reaction process; the product of the ester exchange reaction is filtered, such that the catalyst is removed; and the obtained product is processed through rectification separation, such that the product cyclopentanol is obtained. The method provided by the invention provides substantial positive effects. The addition reaction and the ester exchange reaction have relatively high conversion rate and selectivity, and an average overall yield reaches approximately 80%. More importantly, no substance with high acidity and corrosivity is appeared in the reaction system during the whole reaction process. The raw materials which are not reacted can easily be recovered and reused, and almost no environment pollution is caused.

[Problem] To provide a cyclopentene ring-opening copolymer used in a rubber composition for tires having excellent wet grip performance and low heat buildup; and a method for producing the cyclopentene ring-opening copolymer. To further provide a rubber composition obtained by using the cyclopentene ring-opening copolymer. [Solution] This cyclopentene ring-opening copolymer comprises cyclopentene and a cyclic olefin containing an aromatic ring; the content of the aromatic ring with respect to the total weight of the copolymer is 10 to 40 wt %; and the weight average molecular weight (Mw) is 200,000 to 1,000,000. The cyclopentene ring-opening copolymer alternatively comprises cyclopentene and a norbornene compound; the weight ratio of cyclopentene-derived structural units to all repeating structural units in the copolymer is 40 to 90 wt %, and the weight ratio of norbornene compound-derived structural units is 10 to 60 wt %; and the weight average molecular weight (Mw) is 200,000 to 1,000,000.

A magnetic recording medium and method for forming the magnetic recording medium are described. The magnetic recording medium includes a magnetic layer formed on a non-magnetic support, and a lubricant layer over the magnetic layer. The lubricant layer includes a compound selected from hydrocarbyl-substituted cyclopentanes, hydrocarbyl-substituted cyclopentenes, hydrocarbyl-substituted cyclopentadienes, and mixtures or derivatives thereof and, optionally, one or more additives. The lubricant layer also may be used on a magnetic head for reading and writing information on a magnetic recording medium. The magnetic recording medium and the magnetic head may be used to manufacture computer disk drives, compact disk drives, audio equipment, and video equipment.

An industrial process for preparing cyclopentene features use of cyclopentadiene as raw material, alcohol as solvent and metal Ni as catalyst, and includes selective hydrogenation by molecular hydrogen, and rectifying to separate cyclopentene from cyclopentane as by-product and solvent. Its advantages are high purity (98%) and selectivity (95%) and no environmental pollution.

The present invention relates to 4,5-ring annulated indole derivatives, compositions comprising at least one 4,5-ring annulated indole derivatives, and methods of using the 4,5-ring annulated indole derivatives for treating or preventing a viral infection or a virus-related disorder in a patient. Wherein ring Z, of formula (I), is a cyclopentyl, cyclopentenyl, 5-membered heterocycloalkyl, 5-membered heterocycloalkenyl or 5-membered heteroaryl ring.