Propyne

Abstract

The article contains sections titled: 1. Production 2. Stabilized Propyne–Propadiene Mixtures

Calcium-Based Metal–Organic Framework for Simultaneous Capture of Trace Propyne and Propadiene from Propylene

“…The commensurate adsorption of propyne and propadiene indicated that these two gas molecules were packed more efficiently within the pore channel of the Ca-based MOF compared with the incommensurate component propylene, revealing the high selectivity of propyne and propadiene over propylene. Furthermore, previous research has shown that the density of bulk liquid propyne was 638.9 kg/m 3 at 273.15 K . With the Connolly radius of 1.0 Å, the free volume of Ca-based MOF was calculated to be 453 Å 3 and the calculated density of adsorbed propyne was 741.3 kg/m 3 at 273 K, which indicated a highly dense packing of “liquid propyne” within the Ca-based MOF.…”

Calcium-Based Metal–Organic Framework for Simultaneous Capture of Trace Propyne and Propadiene from Propylene

“…The commensurate adsorption of propyne and propadiene indicated that these two gas molecules were packed more efficiently within the pore channel of the Ca-based MOF compared with the incommensurate component propylene, revealing the high selectivity of propyne and propadiene over propylene. Furthermore, previous research has shown that the density of bulk liquid propyne was 638.9 kg/m 3 at 273.15 K . With the Connolly radius of 1.0 Å, the free volume of Ca-based MOF was calculated to be 453 Å 3 and the calculated density of adsorbed propyne was 741.3 kg/m 3 at 273 K, which indicated a highly dense packing of “liquid propyne” within the Ca-based MOF.…”

CuH-Catalyzed Olefin Functionalization: From Hydroamination to Carbonyl Addition

“…In order for a parent allylcopper complex to result from hydrocupration, the appropriate olefin precursor would need to be 1,2-propadiene, or allene. As it turns out, allene gas is a million ton/year byproduct of hydrocarbon cracking that was considered to be an undesired contaminant in the propylene feedstock with essentially no productive chemical application . We showed that, in fact, allene or allene-containing crude gas mixtures could function as an efficient, mild, and economical allylation reagent when combined with inexpensive silanes (PMHS or DMMS) and copper catalysts (Figure A) .…”

Hydrofunctionalization of Propadiene – New Life for a Previously Unwanted Product

“…The parent compound of allenes, propadiene, also known as allene, has not been too much in the focus of chemical research to date. Together with its isomer propyne, it is obtained as a byproduct in the cracking process . Between 0.3 and 0.6 wt % of the cracking feedstock is converted to propadiene, where it then together with its isomer propyne makes up about 6 mol % of the C3-fraction.…”

Calcium-Based Metal–Organic Framework for Simultaneous Capture of Trace Propyne and Propadiene from Propylene

“…The commensurate adsorption of propyne and propadiene indicated that these two gas molecules were packed more efficiently within the pore channel of the Ca-based MOF compared with the incommensurate component propylene, revealing the high selectivity of propyne and propadiene over propylene. Furthermore, previous research has shown that the density of bulk liquid propyne was 638.9 kg/m 3 at 273.15 K . With the Connolly radius of 1.0 Å, the free volume of Ca-based MOF was calculated to be 453 Å 3 and the calculated density of adsorbed propyne was 741.3 kg/m 3 at 273 K, which indicated a highly dense packing of “liquid propyne” within the Ca-based MOF.…”

CuH-Catalyzed Olefin Functionalization: From Hydroamination to Carbonyl Addition

“…In order for a parent allylcopper complex to result from hydrocupration, the appropriate olefin precursor would need to be 1,2-propadiene, or allene. As it turns out, allene gas is a million ton/year byproduct of hydrocarbon cracking that was considered to be an undesired contaminant in the propylene feedstock with essentially no productive chemical application . We showed that, in fact, allene or allene-containing crude gas mixtures could function as an efficient, mild, and economical allylation reagent when combined with inexpensive silanes (PMHS or DMMS) and copper catalysts (Figure A) .…”

Hydrofunctionalization of Propadiene – New Life for a Previously Unwanted Product

“…The parent compound of allenes, propadiene, also known as allene, has not been too much in the focus of chemical research to date. Together with its isomer propyne, it is obtained as a byproduct in the cracking process . Between 0.3 and 0.6 wt % of the cracking feedstock is converted to propadiene, where it then together with its isomer propyne makes up about 6 mol % of the C3-fraction.…”

Calcium-Based Metal–Organic Framework for Simultaneous Capture of Trace Propyne and Propadiene from Propylene

“…The commensurate adsorption of propyne and propadiene indicated that these two gas molecules were packed more efficiently within the pore channel of the Ca-based MOF compared with the incommensurate component propylene, revealing the high selectivity of propyne and propadiene over propylene. Furthermore, previous research has shown that the density of bulk liquid propyne was 638.9 kg/m 3 at 273.15 K . With the Connolly radius of 1.0 Å, the free volume of Ca-based MOF was calculated to be 453 Å 3 and the calculated density of adsorbed propyne was 741.3 kg/m 3 at 273 K, which indicated a highly dense packing of “liquid propyne” within the Ca-based MOF.…”

CuH-Catalyzed Olefin Functionalization: From Hydroamination to Carbonyl Addition

“…In order for a parent allylcopper complex to result from hydrocupration, the appropriate olefin precursor would need to be 1,2-propadiene, or allene. As it turns out, allene gas is a million ton/year byproduct of hydrocarbon cracking that was considered to be an undesired contaminant in the propylene feedstock with essentially no productive chemical application . We showed that, in fact, allene or allene-containing crude gas mixtures could function as an efficient, mild, and economical allylation reagent when combined with inexpensive silanes (PMHS or DMMS) and copper catalysts (Figure A) .…”

Hydrofunctionalization of Propadiene – New Life for a Previously Unwanted Product

“…The parent compound of allenes, propadiene, also known as allene, has not been too much in the focus of chemical research to date. Together with its isomer propyne, it is obtained as a byproduct in the cracking process . Between 0.3 and 0.6 wt % of the cracking feedstock is converted to propadiene, where it then together with its isomer propyne makes up about 6 mol % of the C3-fraction.…”