摘要:
Provided are selected types of terpolymer components comprising terpolymers having monomer units derived from ethylene (E), dicyclopentadiene (DCPD) and norbornene-based (NB) co-monomers. Such terpolymer components have certain specified amounts of each co-monomer as well as certain specified molecular weight and glass transition temperature characteristics. Terpolymer components which are derivatized by hydrogenation and/or by epoxidation and/or hydroxylation are also disclosed, as well as thermoplastic polyolefin compositions which contain the terpolymer components and which have especially desirable structural and thermal properties.Also provided are processes for preparing and derivatizing the terpolymer components herein. Such preparation processes comprise: a) contacting ethylene with a polymerization mixture comprising selected amounts of both DCPD and NB co-monomers, in the presence of a selected activated cyclopentadienyl-fluorenyl metallocene catalyst under specific polymerization conditions to thereby form the desired ethylene-dicyclopentadiene-norbornene terpolymer components within the polymerization mixture. These terpolymer components can then be subsequently derivatized by hydrogenation or functionalization of the residual double bonds therein.
摘要:
A composition having the formula I where R1 and R2 are independently hydrogen, C1 to C12 linear and branched alkyl, C3 to C12 cycloalkyl, aryl, C1 to C12 alkoxy, F, Cl, SO3, C1 to C12 perfluoroalkyl, and N(CH3)2, R3 is independently selected from the group consisting of hydrogen, C1 to C12 linear and branched alkyl, C3 to C12 cycloalkyl, aryl, and 2,2,2-trifluoroethyl, A is —C(R4)—, —(CH2)x—, —(CH2)xNH(CH2)x—, or —CY2CY2—, where R4 is a hydrocarbyl, halosubstituted hydrocarbyl, or alkoxy group of from 1 to 12 carbon atoms, x is an integer from 1 to 12, and Y is halogen, and X is halogen, triflate, acetate, trifluoroacetate, hydride, or tetrafluoroborate. When combined with an activating co-catalyst is useful in polymerizing olefinic monomers.
摘要:
A CO2 amine scrubbing process uses an absorbent mixture combination of an amine containing a primary amino group CO2 sorbent in combination with a non-nucleophilic relatively stronger base. The weaker base(s) are nucleophilic and have the ability to react directly with the CO2 in the gas stream while the relatively stronger bases act as non-nucleophilic promoters for the reaction between the CO2 and the weaker base. Two moles of CO2 can be taken up by the primary amine groups in a dicarboxylation reaction, affording the potential for a highly efficient scrubbing process.
摘要:
A CO2 amine scrubbing process uses an absorbent mixture consisting of an alkanolamine CO2 sorbent in combination with a non-nucleophilic base. The alkanolamine has oxygen and nitrogen sites capable of nucleophilic attack at the CO2 carbon atom. The nucleophilic addition is promoted in the presence of the non-nucleophilic, relatively stronger base, acting as a proton acceptor. The non-nucleophilic base promoter, which may also act as a solvent for the alkanolamine, can promote reaction with the CO2 at each of the reactive hydroxyl and nucleophilic amine group(s) of the alkanolamines. In the case of primary amino alkanolamines the CO2 may be taken up by a double carboxylation reaction in which two moles of CO2 are taken up by the reacting primary amine groups.
摘要:
A CO2 amine scrubbing process uses an absorbent mixture combination of an amine CO2 sorbent in combination with a non-nucleophilic, relatively stronger, typically nitrogenous, base. The weaker base(s) are nucleophilic and have the ability to react directly with the CO2 in the gas stream while the relatively stronger bases act as non-nucleophilic promoters for the reaction between the CO2 and the weaker base. The sorption and desorption temperatures can be varied by selection of the amine/base combination, permitting effective sorption temperatures of 70 to 90° C., favorable to scrubbing flue gas.
摘要:
Ionic liquids are capable of acting as solvents for amine CO2 absorbent compounds in CO2 separation processes and when so used enhance the sorption of the CO2 by the amine. A cyclic sorption process for separating CO2 from a gas stream, such as flue gas or natural gas, brings the gas stream into contact with an absorbent solution of an amine CO2 sorbent in an ionic liquid solvent followed by desorbing the CO2 to regenerate the amine.
摘要:
Ionic liquids are capable of acting as solvents for amine CO2 absorbent compounds in CO2 separation processes and when so used enhance the sorption of the CO2 by the amine. A cyclic sorption process for separating CO2 from a gas stream, such as flue gas or natural gas, brings the gas stream into contact with an absorbent solution of an amine CO2 sorbent in an ionic liquid solvent followed by desorbing the CO2 to regenerate the amine.
摘要:
A CO2 amine scrubbing process uses an absorbent mixture consisting of an alkanolamine CO2 sorbent in combination with a non-nucleophilic base. The alkanolamine has oxygen and nitrogen sites capable of nucleophilic attack at the CO2 carbon atom. The nucleophilic addition is promoted in the presence of the non-nucleophilic, relatively stronger base, acting as a proton acceptor. The non-nucleophilic base promoter, which may also act as a solvent for the alkanolamine, can promote reaction with the CO2 at each of the reactive hydroxyl and nucleophilic amine group(s) of the alkanolamines. In the case of primary amino alkanolamines the CO2 may be taken up by a double carboxylation reaction in which two moles of CO2 are taken up by the reacting primary amine groups.
摘要:
Ionic liquids containing a cation with a potentially nucleophilic carbon atom bearing a relatively acidic hydrogen atom bonded to a potentially nucleophilic carbon atom, typically in the conjugated —NC(H)N— structure or a —NC(H)S— structure of imidazolium, imidazolidinium or thiazolium salts, can be capable of acting as sorbents for CO2 in cyclic separation processes. The ionic liquid may be used on its own, mixed with a solvent, preferably an aprotic, polar, non-aqueous solvent such as toluene, DMSO, NMP or sulfolane, or in conjunction with a non-nucleophilic nitrogenous base promoter compound having a pKa of at least 10.0 such as a carboxamidine or a guanidine.
摘要:
Systems and methods are provided for performing CO2 sorption and regeneration processes that can take advantage of phase changes between solutions of amine-CO2 reaction products and precipitate slurries, where the slurry particles can include solid precipitates formed based on the amine-CO2 reaction products. An amine solution can be used to capture CO2 from a gas phase stream. During this initial capture process, the amine-CO2 reaction product can remain in solution. The solution containing the amine-CO2 reaction product can then be exposed to a set of conditions which result in precipitation of a portion of the amine-CO2 reaction product to form a slurry. The precipitate slurry can be passed into one or more release stages where the conditions for the slurry are altered to allow for release of the CO2.