WO2001064759A1 - Procede de production d'un polymere hydrogene d'hydrocarbure a cycle insature - Google Patents
Procede de production d'un polymere hydrogene d'hydrocarbure a cycle insature Download PDFInfo
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- WO2001064759A1 WO2001064759A1 PCT/JP2001/001511 JP0101511W WO0164759A1 WO 2001064759 A1 WO2001064759 A1 WO 2001064759A1 JP 0101511 W JP0101511 W JP 0101511W WO 0164759 A1 WO0164759 A1 WO 0164759A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/04—Reduction, e.g. hydrogenation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G61/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G61/02—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes
- C08G61/04—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms
- C08G61/06—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms prepared by ring-opening of carbocyclic compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G61/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G61/02—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes
- C08G61/04—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms
- C08G61/06—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms prepared by ring-opening of carbocyclic compounds
- C08G61/08—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms prepared by ring-opening of carbocyclic compounds of carbocyclic compounds containing one or more carbon-to-carbon double bonds in the ring
Definitions
- the present invention relates to a method for producing a polymer hydride of an unsaturated ring-containing hydrocarbon. More specifically, the present invention relates to a method for producing a hydride of an unsaturated ring-containing hydrocarbon polymer having a greatly reduced catalyst content.
- the hydrides of unsaturated ring-containing hydrocarbon polymers containing bulky cyclic hydrocarbon groups in the main chain and Z or side chains have transparency, heat resistance, chemical resistance, moisture resistance, dielectric properties and various mechanical properties. It is a synthetic resin with excellent properties and is widely used in various fields. These are amorphous and highly transparent because they contain bulky cyclic hydrocarbon groups in the main chain and side chains, and are widely used as optical materials.
- Examples of unsaturated ring-containing hydrocarbon polymers that are precursors of powerful hydrogenated polymers include addition copolymers, ring-opening polymers, and styrene polymers containing an aromatic group in the side chain.
- the addition copolymer is generally obtained by addition polymerization of a cyclic olefin-cyclic gen and ethylene or ⁇ -olefin.
- Styrene polymers are widely used as general-purpose resins. However, It is hard to say that it has high performance in terms of heat resistance and weather resistance. From such a viewpoint, a proposal has been made to hydrogenate the contained aromatic group to form a vinylcyclohexane polymer.
- a homogeneous catalyst and a heterogeneous catalyst are used for the hydrogenation reaction of these unsaturated ring-containing hydrocarbon polymers.
- Heterogeneous catalysts which can easily separate the catalyst compared to homogeneous catalysts, are often used. Examples of such equipment include filtration using a filter and a mechanical centrifuge.
- the latter is a device that can continuously separate the catalyst, but because it has a drive unit, mechanical troubles are likely to occur, and periodic maintenance is required. Become.
- Another major disadvantage is that high-pressure liquids such as hydrogenation reaction liquids cannot be directly introduced into the apparatus.
- the equipment itself is very expensive, which also has a significant effect on production costs.
- the hydrocyclone has the advantage that there are no moving parts in the equipment and there is no mechanical trouble, the equipment is small and has a simple structure, it can be manufactured at low cost, and the processing capacity is large compared to the small size, but 0.5 to 2 kgf
- the disadvantage is that an expensive device such as a pump for slurry with a high head of Z cm 2 is required.
- An object of the present invention is to overcome the various problems in the conventional heterogeneous catalyst separation / recovery process and produce a hydride of an unsaturated ring-containing hydrocarbon polymer in which the content of the heterogeneous catalyst has been greatly reduced. It is to provide a method.
- Another object of the present invention is to provide a method for efficiently producing a hydride of an unsaturated ring-containing hydrocarbon polymer having a greatly reduced content of a heterogeneous catalyst. Still other objects and advantages of the present invention will become apparent from the following description.
- An unsaturated ring-containing hydrocarbon polymer containing at least one aliphatic carbon-carbon double bond and Z or at least one aromatic hydrocarbon group in a main repeating unit is produced by subjecting an unsaturated heterocyclic hydrocarbon polymer to the presence of a heterogeneous catalyst.
- a hydrogenation reaction is carried out in an inert solvent under hydrogen pressure, and the resulting suspension containing the hydrogenated polymer and the heterogeneous catalyst is applied to the liquid cycle port by the hydrogen pressure used in the hydrogenation reaction. Pumping, separating and recovering the heterogeneous catalyst from the suspension at the liquid cycle port, and recovering the hydrogen polymer as a solution in an inert solvent.
- FIG. 1 is a schematic explanatory view of one example of a manufacturing apparatus for performing the manufacturing method of the present invention.
- FIG. 2 is a schematic explanatory view of another example of the manufacturing apparatus for performing the manufacturing method of the present invention.
- FIG. 3 is a schematic explanatory view of another example of the manufacturing apparatus for performing the manufacturing method of the present invention.
- Figure 4 is a schematic diagram of a cone-type hydrocyclone. In the figure, (a) shows a plan view and (b) shows a sectional view.
- FIG. 5 shows the shape of the hydrocyclone used in the example.
- (a) shows a plan view and (b) shows a sectional view.
- FIG. 6 is a flowchart illustrating an example of the manufacturing method of the present invention.
- the unsaturated ring-containing hydrocarbon polymer in the present invention mainly comprises a monomer unit containing at least one aliphatic carbon-carbon double bond and Z or at least one aromatic hydrocarbon group in a repeating unit.
- unsaturated ring-containing hydrocarbon polymers include, for example, addition polymers, ring-opening polymers, styrene polymers, and the like.
- the addition polymer is generally obtained by copolymerizing a cyclic gen with ethylene or olefin. These are disclosed in Japanese Patent Application Laid-Open Nos. 60-168708, 61-159159, 61-221206, and Show 6 1-2 9 2 6 0 1 No., for example.
- the cyclic diene e.g. Shikuropen evening Zhen, Jishikuropen evening Zhen, Noruporunajen, 5 E dust Den nor Pol Nene, 8 E dust Den tetracyclo [4. 4. 0. I 2 '5 . I 7' 10] -3 - dodecene, 8-isopropylidene tetracyclo [4. 4. 0. I 2 '.
- hydrocarbon cyclic diene _3- dodecene such as is preferably used.
- hydrocarbon cyclic diene _3- dodecene such as is preferably used.
- a cyclic off-line may be used in a range of 30% or less of the cyclic gen.
- Such cyclic Orefin for example norbornene, Te Torashikuro [4. 4. 0. I 2 hydrocarbon cyclic Orefin such '5.
- I 7' 10 J -3- dodecene suitably.
- the monoolefin used in the present invention include propylene having 3 or more carbon atoms, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene and the like.
- ethylene is most preferable from the viewpoint of reactivity, but propylene is also preferably used.
- ⁇ -olefins may be used alone or in combination of two or more.
- Such an addition polymer can be easily synthesized generally in the presence of a Cidara monocatalyst or a meta-aqueous catalyst.
- the ring-opening polymer used in the present invention is generally obtained by polymerizing a cyclic olefin-cyclic diene in the presence of a metathesis catalyst. These are disclosed in JP-A-60-26024, JP-A-63-218726, JP-A-2-133413 and JP-A-3-109418. As used was that monomer, for example norbornene, 5 _ phenylalanine nor Pol Nene, Tetorashiku port [4. 4. 0.
- Another group of unsaturated ring-containing hydrocarbon polymers used in the present invention includes styrene homopolymers and styrene copolymers.
- examples of the styrene monomer used in the styrene polymer include styrene, ⁇ -methylstyrene, ⁇ -methylstyrene, and vinylnaphthylene. Of these, styrene is most preferably used in view of availability and physical properties of the final polymer.
- the copolymerization component for example, a hydrocarbon conjugated diene such as butadiene, isoprene and 2,3-dimethylbutadiene is preferably used.
- the mechanical properties can be significantly improved without impairing the transparency of the target hydrogenated polymer.
- the introduction ratio is 30% by weight or less, preferably 20% by weight or less of the styrene monomer. Introducing more than this is not preferred because it not only impairs the heat resistance of the hydrogenated polymer but also impairs the transparency.
- Such a styrene polymer can be obtained by polymerizing the corresponding styrene monomer by any of radical polymerization, anion polymerization, cationic polymerization, and coordinated anion polymerization.
- radical polymerization is preferably used to obtain a polymer having a wide molecular weight distribution
- anion polymerization is preferably used to obtain a narrow polymer.
- An anion polymerization method is preferably used to obtain a copolymer with a gen.
- the copolymer may be a random copolymer or a block copolymer, but a block copolymer is preferably used from the viewpoint of heat resistance.
- a radial block copolymer or a graft copolymer branched into a star shape is also preferably used.
- the molecular weight of the unsaturated ring-containing hydrocarbon polymer used in the present invention is an important index that governs the mechanical properties of the target hydrogenated polymer.
- the weight average molecular weight (Mw) in terms of polystyrene measured by GPC (gel permeation-shion chromatography) is preferably in the range of 30,000 to 1,000,000, more preferably. Is in the range of 50,000 or more, more preferably in the range of 80,000 to 400,000. If the average molecular weight is lower than that, If the mechanical strength of the polymerized polymer is insufficient, if it is higher than this, the melt viscosity is too high and the fluidity is insufficient, and molding becomes difficult, which is not preferable.
- the reduced viscosity s pZ c measured at 3 Ot: in a 0.5 gZd L toluene solution is 0.1 to: L 0 d LZ g , Preferably in the range of 0.3 to 3 d LZg, and more preferably in the range of 0.4 to 2.0 d LZg.
- a hydrogenated polymer is produced by hydrogenating such an unsaturated ring-containing hydrocarbon polymer in an inert solvent under hydrogen pressure using a heterogeneous catalyst.
- the hydrogenation reaction will be described in detail.
- heterogeneous catalyst used in the present invention examples include metals such as nickel, cobalt, ruthenium, rhodium, platinum and palladium, oxides thereof, salts thereof and complexes thereof.
- heterogeneous catalyst examples include those in which these are supported on a porous carrier such as activated carbon, diatomaceous earth, silica, and alumina.
- a solid catalyst in which at least one metal selected from the group consisting of a metal, an oxide thereof, a salt thereof or a complex thereof is supported on a porous carrier is preferred.
- Raney nickel, Raney cobalt, stabilized nickel, and a supported catalyst of nickel, ruthenium, rhodium, palladium or platinum on silica, alumina or silicic alumina are preferred.
- an unsaturated ring-containing hydrocarbon polymer as a raw material and a hydrogenated polymer as a product are dissolved, an undesired side reaction is not caused in a hydrogenation reaction, and a catalyst is used.
- a solvent a hydrocarbon solvent is preferably used.
- aliphatic saturated hydrocarbons such as pentane, hexane, heptane and octane
- alicyclic saturated hydrocarbons such as cyclopentane, methylcyclopentane, cyclohexane, methylcyclohexane, cyclooctane and decalin
- Benzene, toluene, xylene, ethylbenzene, tetralin and the like may be used alone or some Alternatively, two or more kinds may be used in combination.
- aliphatic saturated hydrocarbons and alicyclic saturated hydrocarbons are preferred, and hexane, heptane, cyclohexane, and methylcyclohexane are particularly preferred.
- decalin are preferred.
- a polar solvent such as ethers or alcohols may be used in combination to suppress the side reaction and smoothly carry out the hydrogenation reaction.
- Such solvents include linear or cyclic ethers such as ethyl ether, diisopropyl ether, dibutyl ether, methyl-tert-butyl ether, tetrahydrofuran, dioxane, 1,3-dioxolane; methanol, ethanol, isopropanol, n-butyl ether.
- Aliphatic or alicyclic alcohols such as knol, isobutanol and cyclohexanol are preferably used.
- the concentration of the unsaturated ring-containing hydrocarbon polymer in the hydrogenation reaction system is, for example, 4% by weight to 40% by weight, preferably 5% by weight to 30% by weight, and more preferably 1% by weight to 30% by weight. 0% to 25% by weight is used. If it is less than 4% by weight, productivity tends to decrease, which is not preferable. If it exceeds this, the hydrogenated polymer is likely to precipitate or the viscosity of the reaction mixture tends to be high, and stirring cannot be carried out smoothly, which is not preferable.
- the hydrogenation reaction is performed at high temperature and high pressure.
- the temperature used also depends on the catalyst and the hydrogen pressure to be used, preferably 1 0 O ⁇ 2 5 0, more preferably conducted at 1 5 0 a C ⁇ 2 0 0 ° C.
- the reaction does not proceed smoothly, and at a high temperature of more than 250 ° C., side reactions and a decrease in molecular weight tend to occur.
- 5 0 ⁇ 2 5 0 kgf Z cm 2 more preferably 8 0 ⁇ 2 0 0 kgf Z cm 2 is used as the hydrogen pressure.
- the reaction time depends on various factors such as the concentration of the polymer, the activity and concentration of the catalyst, the temperature, the hydrogen pressure, and the stirring efficiency, and is, for example, 0.5 to 50 hours, preferably 1 to 20 hours, more preferably The training takes place over a period of 1.5 hours to 10 hours.
- the hydrogenation rate of the hydrogenated polymer thus obtained is, for example, 90% or more, preferably 95%, more preferably 99% or more is used.
- the resulting suspension containing the hydrogenated polymer is then pumped into a liquid cyclone by the hydrogen pressure applied to the reaction system, and the heterogeneous catalyst is separated and recovered in the liquid cycle port. And a hydrogenated polymer having a reduced heterogeneous catalyst content.
- the step of separating and recovering the heterogeneous catalyst using the liquid cyclone will be described in detail.
- Figures 1 to 3 show examples of equipment for performing the hydrogenation process using a liquid cycle port.
- 1 is a stirring tank
- 2 is a pump
- 3 is a hydrogenation reactor
- 4 is a catalytic cycle liquid cyclone
- 5 is a pressure control valve
- 6 is a flow ratio control valve
- 7 is a flow rate.
- Control valve, 8 is catalyst activated liquid cyclone, 9 is recovered catalyst storage tank, A is suspension of unsaturated ring-containing hydrocarbon polymer, B is hydrogen, C is raw suspension of hydrogenated polymer, is catalyst Suspension of the hydrogenated polymer in the cycle system, C 2 is the suspension of the hydrogenated polymer in the catalyst activation system, D is the downstream (high catalyst concentration) suspension in the catalyst cycle system, is the downstream in the catalyst cycle system (high catalyst concentration) suspension, D 2 is your Keru downstream (high catalyst concentration) was added catalytic activation system, E is suspended upstream (low concentration) in the catalytic cycle system Nigoeki, upstream in the catalytic cycle system ( low concentration) suspension, E 2 is definitive in catalyst activation system upstream (low concentration) suspension, F The catalyst suspension after activation and regeneration, X is an unsaturated ⁇ hydrocarbon polymer and inert solvent, Y is a filtration step and Z is the catalyst activation step.
- FIG. 1 shows an example of an apparatus for performing a hydrogenation process using a hydrocyclone.
- This apparatus mainly comprises a stirring tank 1, a hydrogenation tank 3, and a hydrocyclone 4.
- the hydrogenated polymer suspension (hereinafter referred to as “raw suspension”) obtained after the hydrogenation reaction is sent to the liquid cyclone 4 by adjusting the hydrogen pressure with a pressure control valve 5.
- the liquid cyclone separates the catalyst into low-concentration suspension (upstream suspension) E and high-concentration suspension (downstream suspension) D in terms of catalyst content.
- the upstream suspension is pumped to filtration step Y as needed.
- a heterogeneous catalyst can be separated and recovered from the suspension by a known method.
- the downstream suspension containing a large amount of the separated and recovered heterogeneous catalyst or heterogeneous catalyst can be directly transferred to a stirring tank, returned to the hydrogenation tank, and used again for the hydrogenation reaction. That one A part or the whole amount can be transferred to the catalyst activation step z, activated and regenerated, transferred to a stirring tank, returned to the hydrogenation tank and used for the hydrogenation reaction.
- a new catalyst may be used in place of activation and regeneration.
- Fig. 2 shows another example of a device that performs a hydrogenation process using a hydrocyclone.
- the process mainly comprises a stirred tank 1, a hydrogenation tank 3, and hydrocyclones 4 and 8.
- the suspension containing the unsaturated ring-containing hydrocarbon-based polymer and the heterogeneous catalyst (hereinafter also referred to as the original suspension) C is a pressure control valve
- the hydrogen pressure is adjusted in 5 and at least a part of it (suspension is pumped to the hydrocyclone 4 (catalytic cycle step).
- the upstream suspension is pumped to the filtration step Y if necessary, and the downstream suspension containing the catalyst at high concentration is stirred in the stirred tank 1
- the other part C 2 of the raw suspension C that has passed from the hydrogenation reaction tank 3 through the pressure control valve 5 is pumped to the hydrocyclone 8, and the low-concentration suspension (upstream suspension) Nigoeki) high concentration suspension (downstream suspension and E 2) are separated D 2 binary.
- the upstream suspension E 2 Pumped optionally a filtration step Y.
- the downstream suspension D 2 containing catalyst at a high concentration is transferred to a catalyst activating step Z, is produced activated and re.
- the catalyst after activation and regeneration The suspension F is returned to the stirring tank 1.
- a new catalyst may be used instead of activation and regeneration.
- the distribution of C 2 and C 2 is determined in consideration of the catalyst life.
- the replenishment of the catalyst is the same as in the batch process, but is performed continuously.
- FIG. 1 Another example of performing a hydrogenation process using a liquid cycle port is shown in FIG.
- This process mainly consists of a hydrogenation tank 3 and a hydrocyclone 4.
- the hydrogenated unsaturated ring-containing hydrocarbon polymer suspension (hereinafter referred to as the raw suspension) obtained after the hydrogenation reaction is adjusted to the hydrogen pressure by the pressure control valve 5 to form the liquid cyclone 4.
- the hydrocyclone separates the catalyst suspension into a low-concentration suspension (upstream suspension) E and a high-concentration suspension (downstream suspension) D.
- the upstream suspension is pumped to filtration step Y as needed.
- the downstream suspension containing a large amount of the catalyst is temporarily stored in the recovered catalyst storage tank 9.
- the suspension in this storage tank can be returned to the hydrogenation tank as it is and used again for the hydrogenation reaction.
- the heterogeneous catalyst can be separated and recovered from the suspension by a known method without returning the suspension in the storage tank to the hydrogenation tank as it is.
- the separated and recovered catalyst is transferred to the catalyst activation step Z, activated and regenerated, and then returned to the hydrogenation tank and used for the hydrogenation reaction.
- the activity of the catalyst is high, it can be returned to the hydrogenation tank without activation and regeneration, or a new one can be used instead of activation and regeneration.
- a new catalyst may be used.
- D c is the liquid cycle inlet diameter
- 1 ′ is the raw suspension inlet
- 2 is the downstream (high catalyst concentration) suspension outlet
- 3 ′ is the upstream (low catalyst concentration) suspension outlet
- a 2 is the upper cylinder
- ⁇ is the cone.
- hydrocyclone used in the present invention, is not particularly limited hydrocyclone used, generally as shown in FIG. 4, (consisting of eight 1 and eight 2) cylindrical portion and the cone-type liquid cycle opening comprising a conical portion (B).
- the raw suspension is press-fitted into the lower cyclone cylinder (A) from the hydrocyclone inlet 1 ′.
- the centrifugal force and gravity acting on the suspension allow the catalyst to be used in the lower cyclone cylinder. From the bottom wall, it travels down the conical wall, gathers at the bottom of the conical section, and exits from the downstream suspension outlet 2 ', while the upstream suspension with reduced catalyst concentration flows from the lower cylindrical section (Ai). It is pushed up by the upper cylindrical part (A 2 ) and then exits from the upstream suspension outlet 3 '.
- the diameter (Dc) of the cone-type hydrocyclone used in the present invention is selected in consideration of catalyst separation efficiency, treatment capacity, and the like. In general, for example, those having a Dc of 10 to 50 Omm, preferably 20 to 25 Omm, more preferably 100 to 25 Omm are used. Exceeding that, the centrifugal force, which is the driving force for separation of the catalyst by the liquid cyclone, becomes difficult to work sufficiently on the heterogeneous catalyst, and the performance of separating the heterogeneous catalyst at the liquid cycle mouth deteriorates. In addition, if it is less than this, it is not preferable because the processing capacity is not sufficient.
- the apex angle (0) of the conical portion is, for example, in the range of 6 ° to 40 °, preferably in the range of 10 ° to 30 °. If the angle exceeds 40 °, a large amount of the heterogeneous catalyst separated on the conical wall flows to the downstream suspension outlet and becomes difficult to flow out. Conversely, if the angle is less than 6 °, the length of the cone (L 2 ) becomes large, the size of the apparatus becomes large, and the heterogeneous catalyst is blocked at the apex of the cone. Therefore, there is no point in reducing the apex angle any further.
- the length (1 ⁇ ) of the lower cylindrical portion for example, a range of 0.5Dc to 5Dc, preferably a range of Dc to 3.5Dc is used.
- the heterogeneous catalyst to be separated at the cone is separated at the cylinder wall.
- the separated catalyst accumulates on the cylindrical wall, and then the separated heterogeneous catalyst Are re-scattered, and the separation efficiency is reduced.
- the circumferential rotating flow does not sufficiently develop in the cylindrical part. Therefore, a sufficient centrifugal force does not act on the heterogeneous catalyst, and the separation efficiency is deteriorated.
- it is preferable that 70% by weight or more of the amount of the heterogeneous catalyst contained in the suspension is separated and recovered by the liquid cyclone.
- the heterogeneous catalyst used in the hydrogenation reaction of the present invention has a mass median diameter of preferably 1 m or more, more preferably 10 zm or more.
- a mass median diameter preferably 1 m or more, more preferably 10 zm or more.
- the true density of the heterogeneous catalyst or, if the heterogeneous catalyst has porosity the density taking into account the weight of the solution of the hydrogenated polymer in the inert solvent permeated into the pores (apparent density) ) and the difference in density of the solution in an inert solvent in the hydrogenated polymer, is favored properly 0. 01 g cm 3 or more, more preferably 0. 1 gZcm 3 or more.
- the apparent density of the catalyst means the density in consideration of the solution of the hydrogenated polymer that has permeated into the pores of the heterogeneous catalyst formed into a porous particle.
- the apparent density pa (Wc + Ws) Z (Wc / pc + Ws / ps)
- the concentration of the catalyst in the suspension to be introduced is preferably 60% by weight or less, more preferably 50% by weight or less, and further preferably 20% by weight or less.
- the content exceeds 60% by weight, the amount of the heterogeneous catalyst separated and recovered in the liquid cycle mouth tends to be excessive in the liquid cycle mouth, and the catalyst once separated from the suspension is scattered again and the liquid is removed. It is not preferable because it adversely affects the separation performance of the cycle mouth.
- the solution viscosity of the solution of the hydrogenated polymer contained in the raw suspension is preferably in the range of 500 cp or less, more preferably 100 cp or less, and further preferably 50 cps or less. If it exceeds this, the heterogeneous catalyst receives a large resistance from the suspension, and is difficult to be separated from the suspension, which is not preferable.
- the most preferred embodiment is to use the original suspension obtained by the hydrogenation reaction without dilution or concentration.
- the raw suspension is injected into the liquid cycle port with the hydrogen pressure used in the hydrogenation reaction.
- the hydrogen pressure used for hydrogenation is high. Therefore, no additional pressurization is required when separating the catalyst using a hydrocyclone. In many cases, the pressure is reduced and injected into the hydrocyclone. At this time, it is necessary to consider the relationship between the vapor pressure of the solvent used and the operating temperature. In other words, careless pressure reduction is not preferable because the solvent evaporates depending on the operating temperature.
- the hydrogen pressure used is preferably 0. 5 ⁇ 250 kg fZcm 2, preferably in the range of 5 ⁇ 200 kgf Zcm 2 is used. Exceeding this is not desirable because of restrictions on the equipment. Conversely, below this is not preferable because the suspension cannot be sent to the liquid cycle port at a sufficient flow rate due to insufficient pressure.
- Mass flow ratio when the mass flow through the upstream suspension and units downstream suspension time (kg Z hr), respectively and V 2, f ⁇ V iZ, defined by + V 2).
- V 2 f ⁇ V iZ, defined by + V 2.
- f is greater than 0.99, the catalyst separation efficiency is reduced, and when f is less than 0.7, the processing capacity is reduced.
- the process according to the present invention described above is applicable to a batch process and a continuous process. Further, in order to obtain a molding polymer, the solvent can be removed, for example, through a flushing step.
- a solution of the hydrogenated polymer recovered in the above-described production method in an inert solvent is further subjected to filtration to obtain a highly purified hydrogenated unsaturated cyclic hydrocarbon.
- This is a method for producing a combined hydride, that is, a hydrogenated polymer. That is, it is possible to obtain a highly purified hydrogenated polymer by further passing the upstream suspension having a reduced catalyst concentration and containing the hydrogenated polymer to a filtration step.
- the upstream suspension with the reduced catalyst concentration and containing the hydrogenated polymer contains flammable and explosive hydrogen gas, so the hydrogen gas present in the system can be replaced with an inert gas.
- the inert gas for example, nitrogen gas, argon gas, neon gas, carbon dioxide gas and the like are preferably used. Thereafter, a suspension having substantially reduced hydrogen concentration and substantially no hydrogen gas is sent to the filtration step.
- the filtration is performed at a predetermined temperature and a predetermined pressure by a method known per se.
- the filter medium used for filtration is not particularly limited as long as the filter medium does not corrode or break during filtration, but examples thereof include a membrane filter, a woven cloth filter, a non-woven cloth filter, a sintered metal filter, a ceramic filter, and a filter paper. It is preferably used.
- the pore size of the filter medium used in the present invention is preferably 0.1 to 5 as the maximum pore size measured by the bubble point test described in JIS K 3 832 or 8 3 1 ⁇ F 3 16-70. 0 ⁇ m, more preferably 0.1 to 10 m, even more preferably 0.1 to 5 m. If it is smaller than this, the pressure loss at the time of filtration tends to be large. If it is larger than this, it is difficult to obtain sufficient filtration accuracy.
- the filtration step can be repeated two or more times several times in order to increase the filtration accuracy.
- the second and subsequent filtration steps may be performed immediately after the first filtration step, after the flushing step, or a combination thereof.
- the filter media used may be the same or different.
- the filtration temperature is not particularly limited as long as there is no inconvenience in the filtration, but from the viewpoint of minimizing energy loss, it is preferable to perform the filtration at a temperature around the temperature used when hydrogen gas is replaced with an inert gas. . By doing so, the energy applied for heating the highly purified hydrogenated polymer solution in the subsequent flushing step can be advantageously saved.
- a filtration aid can be used at the time of filtration. Filtration using a filter aid is performed by a method known per se.
- Another preferred embodiment of the present invention is a method in which the solution of the hydrogenated polymer recovered in the production method in an inert solvent is further subjected to a centrifugation step and, if necessary, a filtration step to obtain a highly purified hydrogenated polymer. This is a method for producing a polymer.
- this method is to purify the upstream suspension having a reduced catalyst concentration and containing the hydrogenated polymer by centrifuging the suspension and using a filter medium as necessary.
- a device known per se is used as the centrifugal separator. Specifically, centrifuges with centrifugal sedimentation tubes, cylindrical centrifuges, and centrifugal separators And the like are preferably used. By doing so, the heterogeneous catalyst in the suspension of the hydrogenated polymer can be further removed before removing the fine particles of the heterogeneous catalyst by filtration, and the load of filtration can be reduced. .
- additives which are soluble in the polymer solution such as a stabilizer, an ultraviolet absorber and a release agent may be added at this stage.
- the addition is preferably performed before the filtration or in the case of performing filtration a plurality of times, in any of the steps during the filtration.
- Such additives although soluble in their own right, contain extrinsic impurities such as dirt and dust, and insoluble endogenous impurities contained in the additives, so if added after filtration, the purity of the product will be reduced. Not preferred.
- the method of addition is not particularly limited. For example, it can be added in a molten state or in a slurry or a solution as a solid. From the viewpoint of the operation, it is particularly preferable to add in the form of slurry or solution.
- the solvent can be removed from the obtained hydrogenated polymer solution to obtain a highly purified hydrogenated polymer.
- the method for removing the solvent is not particularly limited, and a known method such as a flashing method, a method of pouring into a non-solvent, and coagulating is employed. Among them, the flushing method is economically advantageous because it does not require the use of a non-solvent.
- the total amount of metal residues derived from the catalyst in the highly purified hydrogenated polymer thus obtained is preferably 5 ppm or less, more preferably 3 ppm or less, and still more preferably 1 ppm, based on the polymer. It is as follows. Exceeding 5 ppm is not preferable because the signal characteristics of the optical recording medium deteriorate. In addition, it is not preferable that the hydrogenated polymer contains foreign matter that is incompatible with the polymer. Such foreign matter refers to foreign matter derived from various additives such as a catalyst-derived foreign matter, a stabilizer, an ultraviolet absorber, and a release agent.
- the content of foreign matter having a particle size of 0.5 im or more contained in the highly purified hydrogenated polymer is preferably 3 ⁇ 10 4 —less than the polymer, more preferably 2 ⁇ 10 4 Z g _ polymer, and more preferably not more than 1 X 1 0 4 or Zg- polymer.
- Exceeding 3 X 10 4 Zg-polymer is not preferable because the signal characteristics of the optical recording medium deteriorate.
- the hydrogen pressure of the hydrogenation reaction is used, so that it is not necessary to use a high-yield slurry pump.
- the present invention is useful as a process capable of producing a suspension of a hydrogenated polymer having a greatly reduced heterogeneous catalyst content by using an apparatus with low trouble and low production cost.
- the raw materials, measuring methods, equipment, etc. used in the examples are as follows.
- Triisobutylaluminum was purchased as a 2 M concentration toluene solution from Tohso Ixazo Co., Ltd. and used as it was.
- Shishidani Titanium was purchased from Wako Pure Chemical Industries, Ltd. and used as is.
- Tg Glass transition temperature
- UV_240 ultraviolet-visible spectrometer
- the content of foreign substances was measured by dissolving the polymer in cyclohexane and using a light scattering particle counter.
- Mass median diameter of the catalyst The catalyst was suspended in a hexahedral hexane and measured with a laser diffraction / scattering type particle size distribution analyzer.
- the resulting hydrogenated polystyrene stock suspension was introduced into a liquid cyclone (FIG. 5) kept at 180 ° C. under a hydrogen pressure of 12 kgf Zcm 2 .
- the mass flow ratio f was controlled to 0.75 by controlling the valves attached to the outlets of the upstream suspension and the downstream suspension.
- the upstream suspension was almost clear.
- the downstream suspension was a highly concentrated black-brown suspension.
- the separation efficiency determined from the ratio of the amount of catalyst contained in the downstream suspension to the amount of catalyst contained in the original suspension was 99.1% by weight.
- the upstream suspension was subjected to pressure filtration using a membrane filter with a pore size of 0.1 / m (“Fluoropore” manufactured by Sumitomo Electric Industries, Ltd.) to obtain a colorless and transparent hydrogenated styrene polymer solution.
- a membrane filter with a pore size of 0.1 / m (“Fluoropore” manufactured by Sumitomo Electric Industries, Ltd.) to obtain a colorless and transparent hydrogenated styrene polymer solution.
- the density of this solution at the hydrocyclone operating temperature (180 ° C) was 0.55 gZcm 3 , and the solution viscosity was 4 cps.
- the content of foreign substances having a particle size of 0.5 // m or more determined by the light scattering method was 0.82 ⁇ 10 4 Zg-polymer, and was found to be extremely highly purified.
- the hydrogenated polystyrene stock suspension obtained in Example 1 was introduced into a liquid cyclone (FIG. 5) kept at 180 ° C. under a hydrogen pressure of 12 kgf Zcm 2 . At that time, the mass flow ratio f was controlled to 0.92. The upstream suspension was almost clear. The downstream suspension was a black-brown thick suspension. The separation efficiency was 96.5% by weight.
- the reduced viscosity of the polymer obtained by fractionating a small amount of the obtained solution and purifying by a conventional method was 77 spZC, 0.65 dLZg, and the glass transition temperature (Tg) measured by DSC was 186 t: Met.
- reaction solution 23.4 g of lactic acid and 3.O g of water were added at 100 ° C. with stirring, and reacted at the same temperature for 2 hours.
- the reaction solution changed color from black-brown to black cloudy slurry.
- the slurry was subsequently filtered.
- the obtained filtrate was subjected to an adsorption treatment using basic alumina to obtain a colorless treatment liquid.
- the resulting solution was added to a large amount of ethanol, and the deposited precipitate was separated by filtration and dried to obtain a colorless flake-shaped unsaturated ring-opened polymer.
- the obtained flaky unsaturated cyclic ring-opened polymer was dissolved in 3,300 g of toluene.
- the resulting hydrogenated ring-opened polymer stock suspension was introduced into a liquid cyclone (FIG. 5) kept at 15 O under a hydrogen pressure of 12 kgf / cm 2 . At that time, the mass flow ratio f was kept at 0.90.
- the upstream suspension was almost clear. In contrast, the downstream suspension was a highly concentrated black suspension. The separation efficiency was 98.0% by weight.
- the upstream suspension was filtered under pressure using a membrane filter having a pore size of 0.1 m to obtain a colorless and transparent hydrogenated ring-opened polymer.
- the hydrogenation rate of the polymer obtained by fractionating a small amount of this solution and purifying it by a conventional method was 99.9% or more from 1 H-NMR spectrum.
- the reduced viscosity was 7?
- the remaining 20% of the obtained hydrogenated polystyrene stock suspension was depressurized into a catalyst activation liquid cycle port kept at 180 ° C, and then introduced under a hydrogen pressure of 12 kgf Zcm 2 . At that time, the mass flow ratio f was controlled to 0.75.
- the upstream suspension was almost clear.
- the upstream suspension was depressurized and sent to the filtration step.
- the downstream suspension was not activated and regenerated, and instead, an appropriate amount of the catalyst was introduced into the autoclave. The separation efficiency was 99.0%.
- 612 g of polystyrene and 3,018 g of cyclohexane were added, and the mixture was sent to the next (second) hydrogenation reaction.
- the upstream suspension separated in the catalyst cycle port and the catalyst activation port can be combined, and then used with a membrane filter with a pore diameter of 0.1 / m (“Fluoropore” manufactured by Sumitomo Electric Industries, Ltd.). After pressure filtration, a colorless and transparent hydrogenated styrene polymer solution was obtained. The density of this solution at the hydrocyclone operating temperature (180 ° C) was 0.55 g / cm 3 , and the solution viscosity was 4 cps. A small amount of the obtained hydrogenated styrene solution was fractionated and poured into a large amount of ethanol to obtain a white precipitate. The precipitate was separated by filtration and dried to obtain hydrogenated styrene.
- the hydrogenation rate of the hydrogenated polystyrene obtained at the fifth time was 99.7%, and the reduced viscosity 7? SpZC was 0.48 dLZg. That is, no deterioration in quality was observed.
- the hydrogenated styrene polymer solution thus obtained was subjected to a flushing step to produce hydrogenated polymer pellets. Then, injection molding was performed at a cylinder temperature of 300 and a mold temperature of 75 :. As a result, a transparent molded product having a thickness of 2 mm was obtained. Its transmittance was 91%, which proved to be extremely transparent.
- the upstream suspension separated by the hydrocyclone was subjected to pressure filtration using a membrane filter with a pore size of 0.1 m (“Fluoropore” manufactured by Sumitomo Electric Industries, Ltd.).
- a styrene polymer solution was obtained.
- the density of this solution at the hydrocyclone operating temperature (180) was 0.55 gZcm 3 and the solution viscosity was 4 cps.
- a small amount of the obtained hydrogenated styrene solution was collected and put into a large amount of ethanol to obtain a white precipitate.
- the precipitate was separated by filtration and dried to obtain hydrogenated styrene.
- the hydrogenation rate of this polymer determined by 1 H-NMR was 99.0%.
- the reduced viscosity /] sp / C was 0.48 dLZg. Also, what is the residual metal in the resin determined by ICP emission spectroscopy? was highly purified at 0.1 ppm or less and S i was 0.26 ppm.
- the raw suspension extracted from the hydrogenation tank is continuously divided into a catalyst cycle liquid cycle port and a catalyst activation liquid cycle port heated to 150 at a hydrogen pressure of 12 kg fZcm 2 at a flow ratio of 50:50. ⁇ Introduced. At that time, the mass flow ratio f of each cyclone was set to 0.90. Then, of the suspension sent to the catalyst cycle cyclone, the upstream suspension was taken out as a nearly transparent suspension after decompression, and sent to the filtration step after decompression. On the other hand, the downstream suspension was continuously sent to the stirring tank 1. On the other hand, of the suspension sent to the catalyst-activated liquid cyclone, the upstream suspension was sent to the filtration process as a nearly transparent suspension after decompression. Further, the amount of catalyst corresponding to the amount of catalyst in the downstream suspension and the amount of catalyst lost to the filtration step was continuously supplied to the stirring tank 1. In this way, a continuous hydrogenation reaction was performed.
- the catalyst separation efficiency was 98.0% in both the catalyst cycle liquid cycle and the catalyst activation liquid cycle.
- the separated upstream suspension was filtered under pressure using a membrane filter having a pore size of 0.1 ⁇ to obtain a colorless and transparent hydrogenated ring-opened polymer. Then, the sample 1 after the continuous reaction was in the steady state and the sample 2 20 hours after the steady state was reached were analyzed.
- the hydrogenation rates of the polymers of Sample 1 and Sample 2 obtained by the conventional purification method were 99.5% or more in both 1 ⁇ ⁇ -NMR spectra.
- the reduced viscosities 77 s ⁇ C were all 0.53 dLZg, and the Tg measured using DSC was 140 ° C. Thus, it was found that the quality of the hydrogenated unsaturated cyclic ring-opening polymer obtained by this continuous reaction was extremely constant.
- the polymer solution thus obtained was subjected to a flashing process to produce a pellet. Then, injection molding was performed at a cylinder temperature of 30 ° and a mold temperature of 75 to obtain a transparent plate having a thickness of 2 mm. The transmittance of this transparent plate was 91%, confirming extremely high transparency.
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Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001236000A AU2001236000A1 (en) | 2000-03-01 | 2001-02-28 | Process for producing hydrogenated unsaturated ring-containing hydrocarbon polymer |
EP01908149A EP1270607A4 (en) | 2000-03-01 | 2001-02-28 | PROCESS FOR PRODUCING HYDROGEN POLYMER OF UNSATURATED CYCLE HYDROCARBON |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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JP2000055514 | 2000-03-01 | ||
JP2000-55514 | 2000-03-01 | ||
JP2000-93996 | 2000-03-30 | ||
JP2000093996 | 2000-03-30 | ||
JP2001-440 | 2001-01-05 | ||
JP2001000440 | 2001-01-05 |
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Publication Number | Publication Date |
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WO2001064759A1 true WO2001064759A1 (fr) | 2001-09-07 |
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PCT/JP2001/001511 WO2001064759A1 (fr) | 2000-03-01 | 2001-02-28 | Procede de production d'un polymere hydrogene d'hydrocarbure a cycle insature |
Country Status (5)
Country | Link |
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US (1) | US20030139535A1 (ja) |
EP (1) | EP1270607A4 (ja) |
AU (1) | AU2001236000A1 (ja) |
TW (1) | TW575589B (ja) |
WO (1) | WO2001064759A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005520685A (ja) * | 2002-03-19 | 2005-07-14 | ビーピー ケミカルズ リミテッド | サイクロンを使用するガスと固形物との分離 |
US8020707B2 (en) | 2005-02-04 | 2011-09-20 | Samsung Electronics Co., Ltd. | Cyclone, apparatus for separating slurry having the cyclone, and system and method of supplying slurry using the apparatus |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPWO2002021517A1 (ja) | 2000-09-04 | 2004-01-15 | 日本ゼオン株式会社 | 磁気ディスク基板及び磁気ディスク |
PT2419393E (pt) * | 2009-04-16 | 2013-10-21 | Biochemtex Spa | Método para a hidrogenólise de álcoois derivados de açúcar |
JP6403951B2 (ja) * | 2013-12-25 | 2018-10-10 | 出光興産株式会社 | 水素添加石油樹脂の製造方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4595749A (en) * | 1984-11-23 | 1986-06-17 | Shell Oil Company | Direct removal of NI catalysts |
US5462995A (en) * | 1991-06-11 | 1995-10-31 | Nippon Zeon Co., Ltd. | Hydrogenated products of thermoplastic norbornene polymers, their production, substrates for optical elements obtained by molding them, optical elements and lenses |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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USH1303H (en) * | 1990-05-24 | 1994-04-05 | Shell Oil Company | Removal of nickel catalyst from polymer solutions by water addition and centrifugation |
US5223579A (en) * | 1991-01-28 | 1993-06-29 | Shell Oil Company | Solid viscosity index improvers which provide excellant low temperature viscosity |
JP3719271B2 (ja) * | 1995-01-31 | 2005-11-24 | 日本ゼオン株式会社 | 金属汚染物の除去方法 |
US5612422A (en) * | 1995-05-04 | 1997-03-18 | The Dow Chemical Company | Process for hydrogenating aromatic polymers |
WO1998014499A1 (fr) * | 1996-09-30 | 1998-04-09 | Nippon Zeon Co., Ltd. | Polymere de norbornene et son procede de preparation |
SE508111C2 (sv) * | 1996-12-23 | 1998-08-31 | Kvaerner Process Systems As | Förfarande för framställning av väteperoxid genom hydrering av en kinonlösning samt anordning för utövande av förfarandet |
-
2001
- 2001-02-28 US US10/220,246 patent/US20030139535A1/en not_active Abandoned
- 2001-02-28 EP EP01908149A patent/EP1270607A4/en not_active Withdrawn
- 2001-02-28 AU AU2001236000A patent/AU2001236000A1/en not_active Abandoned
- 2001-02-28 WO PCT/JP2001/001511 patent/WO2001064759A1/ja not_active Application Discontinuation
- 2001-03-01 TW TW90104764A patent/TW575589B/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4595749A (en) * | 1984-11-23 | 1986-06-17 | Shell Oil Company | Direct removal of NI catalysts |
US5462995A (en) * | 1991-06-11 | 1995-10-31 | Nippon Zeon Co., Ltd. | Hydrogenated products of thermoplastic norbornene polymers, their production, substrates for optical elements obtained by molding them, optical elements and lenses |
Non-Patent Citations (1)
Title |
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See also references of EP1270607A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005520685A (ja) * | 2002-03-19 | 2005-07-14 | ビーピー ケミカルズ リミテッド | サイクロンを使用するガスと固形物との分離 |
US8020707B2 (en) | 2005-02-04 | 2011-09-20 | Samsung Electronics Co., Ltd. | Cyclone, apparatus for separating slurry having the cyclone, and system and method of supplying slurry using the apparatus |
Also Published As
Publication number | Publication date |
---|---|
US20030139535A1 (en) | 2003-07-24 |
EP1270607A1 (en) | 2003-01-02 |
TW575589B (en) | 2004-02-11 |
AU2001236000A1 (en) | 2001-09-12 |
EP1270607A4 (en) | 2005-04-13 |
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