Recovery and utilization of by-product acetylene from olefin production

Bereshnaya, K. P.; Bystrova, T. A.; Zelentsova, N. I.; Avrekh, G. I.; Shamrai, O. B.

doi:10.1007/bf00723875

Cited by 6 publications

(2 citation statements)

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“…However, the C 2 H 2 /C 2 H 4 separation is a long-standing challenge because they have similar kinetic diameters (C 2 H 2 : 3.3 Å vs. C 2 H 4 : 4.1 Å) and similar physicochemical properties. 4 Current strategies for the separation of C 2 H 2 from C 2 H 4 in industrial processes are mainly cryogenic distillation, catalytic hydrogenation of C 2 H 2 to C 2 H 4 , and solvent extraction. 5 These processes are either energy-/cost-intensive or environmentally unfriendly.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the pore chemistry in porous aromatic frameworks for selective separation of acetylene from ethylene

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Tailoring the pore chemistry in porous aromatic frameworks for selective separation of acetylene from ethylene

et al. 2022

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“…5 Presently, the separation of acetylenes from olefins is accomplished by costly solvent extraction processes using organic solvents such as EG (ethylene glycol), DMF (N,N 0 -dimethylformamide) and NMP (N-methylpyrrolidinone). 6,7 However, this process is disadvantageous in terms of technical and economical aspects, particularly due to the low selectivities of acetylenes over olefins and also to the significant loss of solvent after multiple operations.…”

Section: Introductionmentioning

confidence: 99%

Cu(i)-containing room temperature ionic liquids as selective and reversible absorbents for propyne

Kim

Palgunadi

Mukherjee

et al. 2010

Phys. Chem. Chem. Phys.

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A Cu(i)-containing room temperature ionic liquid (Cu-RTIL), prepared from CuCl and 1,3-dimethylimidazolium methylphosphite ([DMIM][MeHPO(3)]), was found to reversibly and selectively interact with propyne over propylene. Cu-RTIL exhibited 12 times higher propyne absorption capacity and 14 times higher ideal propyne/propylene selectivity than [DMIM][MeHPO(3)]. Fast atom bombardment (FAB)-mass spectral and computational results with Cu-RTIL (CuCl/[DMIM][MeHPO(3)] = 1/2) strongly imply that the Cu-RTIL contains stable methylphosphite-coordinated anionic Cu(i) species such as CuCl(MeHPO(3))(-) and Cu(MeHPO(3))(2)(-). Computational studies on the optimized structures demonstrate that the preferential absorption of propyne over propylene in a Cu-RTIL originates from the difference in the interaction mode between the coordinated phosphite ligand and propyne or propylene. Strong π-complexation of propylene and propyne with Cu in Cu-RTIL is not observed.

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Design and screening of ionic liquids for C₂H₂/C₂H₄ separation by COSMO‐RS and experiments

Zhao

Yang

et al. 2015

AIChE Journal

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Ionic liquids (ILs) have been proposed as promising solvents for separating C 2 H 2 and C 2 H 4 , but screening an industrially attractive IL with high capacity from numerous available ILs remains challenging. In this work, a rapid screening method based on COSMO-RS was developed. We also present an efficient strategy to improve the C 2 H 2 capacity in ILs together with adequate C 2 H 2 /C 2 H 4 selectivity with the aid of COSMO-RS. The essence of this strategy is to increase molecular free volume of ILs and simultaneously enhance hydrogen-bond basicity of anions by introducing flexible and highly asymmetric structures, which is validated by a new class of tetraalkylphosphonium ILs featuring long-chain carboxylate anions. At 298.1 K and 1 bar, the solubility of C 2 H 2 in ILs reaches 0.476 mole per mole IL, very high for a physical absorption, with a selectivity of up to 21.4. The separation performance of tetraalkylphosphonium ILs to the mixture of C 2 H 2 /C 2 H 4 was also evaluated. Topical Heading and Key WordsTopical heading: Separations: Materials, Devices and Processes

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Recovery and utilization of by-product acetylene from olefin production

Cited by 6 publications

References 1 publication

Tailoring the pore chemistry in porous aromatic frameworks for selective separation of acetylene from ethylene

Tailoring the pore chemistry in porous aromatic frameworks for selective separation of acetylene from ethylene

Cu(i)-containing room temperature ionic liquids as selective and reversible absorbents for propyne

Design and screening of ionic liquids for C₂H₂/C₂H₄ separation by COSMO‐RS and experiments

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Recovery and utilization of by-product acetylene from olefin production

Cited by 6 publications

References 1 publication

Tailoring the pore chemistry in porous aromatic frameworks for selective separation of acetylene from ethylene

Tailoring the pore chemistry in porous aromatic frameworks for selective separation of acetylene from ethylene

Cu(i)-containing room temperature ionic liquids as selective and reversible absorbents for propyne

Design and screening of ionic liquids for C2H2/C2H4 separation by COSMO‐RS and experiments

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Product

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Design and screening of ionic liquids for C₂H₂/C₂H₄ separation by COSMO‐RS and experiments