Meteoric diagenesis and dedolomite fabrics in precursor primary dolomicrite in a mixed carbonate-evaporite system

Sedimentology ◽  
2018 ◽  
Vol 65 (6) ◽  
pp. 1827-1858 ◽  
Author(s):  
Tyler E. Hauck ◽  
Hilary J. Corlett ◽  
Matthias Grobe ◽  
Erin L. Walton ◽  
Pierre Sansjofre
Keyword(s):  
Meteoric Diagenesis ◽  
Mixed Carbonate

Synthesis of carbonate esters by carboxymethylation using NaAlO2 as a highly active heterogeneous catalyst

2018 ◽  
Author(s):  
Sreerangappa Ramesh ◽  
Kiran Indukuri ◽  
Olivier Riant ◽  
Damien Debecker
Keyword(s):  
Heterogeneous Catalyst ◽  
Dimethyl Carbonate ◽  
Sodium Aluminate ◽  
High Yield ◽  
Solid Catalyst ◽  
Highly Active ◽  
Aromatic Alcohols ◽  
Green Conditions ◽  
Mixed Carbonate

<p>Sodium aluminate is presented as a highly active heterogeneous catalyst able to convert a range of alcohols into the corresponding mixed carbonate esters, in high yield and under green conditions. The reaction is carried out using dimethyl carbonate both as a reactant and solvent, at 90°C. Allylic, aliphatic and aromatic alcohols are converted in good yields. The solid catalyst is shown to be truly heterogeneous, resistant to leaching, and recyclable. </p>

SEISMIC SCALE BOTTOMSET FACIES OF A MIXED CARBONATE-SILICICLASTIC RAMP: THE JURASSIC-CRETACEOUS VACA MUERTA FORMATION IN THE PICÚN LEUFÚ AREA, NEUQUÉN BASIN, ARGENTINA

2017 ◽  
Author(s):  
Maximiliano Paz ◽  
◽  
Juan Jose Ponce ◽  
Luis A. Buatois ◽  
Gabriela Mángano ◽  
...  
Keyword(s):  
Vaca Muerta ◽  
Neuquen Basin ◽  
Neuquén Basin ◽  
Vaca Muerta Formation ◽  
Seismic Scale ◽  
Mixed Carbonate

MIXED CARBONATE-SILICICLASTIC SEDIMENTATION AND ACCOMMODATION TRENDS IN THE BUG SCUFFLE LIMESTONE, SACRAMENTO MOUNTAINS, NM

2018 ◽  
Author(s):  
Benjamin Rendall ◽  
◽  
Steven L. Bachtel ◽  
Charles Kerans
Keyword(s):  
Sacramento Mountains ◽  
Mixed Carbonate

scholarly journals Mixed carbonate rocks lithofacies features and reservoirs controlling mechanisms in a saline lacustrine basin in Yingxi area, Qaidam Basin, NW China

2021 ◽  
Vol 48 (1) ◽  
pp. 80-94
Author(s):  
Zhanguo LIU ◽  
Yongshu ZHANG ◽  
Guangyong SONG ◽  
Senming LI ◽  
Guohui LONG ◽  
...  
Keyword(s):  
Carbonate Rocks ◽  
Qaidam Basin ◽  
Nw China ◽  
Saline Lacustrine Basin ◽  
Lacustrine Basin ◽  
Yingxi Area ◽  
Saline Lacustrine ◽  
Mixed Carbonate

Crinoids from the Muldraugh Member of the Borden Formation in north-central Kentucky (Echinodermata, Lower Mississippian)

2000 ◽  
Vol 74 (6) ◽  
pp. 1072-1082 ◽  
Author(s):  
William I. Ausich ◽  
Alan Goldstein ◽  
Ron Yates
Keyword(s):  
United States ◽  
New Species ◽  
Rank Order ◽  
Species Abundance ◽  
North Central ◽  
First Report ◽  
Eastern Side ◽  
Borden Formation ◽  
Depositional Setting ◽  
Mixed Carbonate

A new late Osagean (Lower Mississippian) crinoid fauna is described from the Muldraugh Member of the Borden Formation of central Kentucky. The Muldraugh Member records a mixed carbonate-siliciclastic tempestite-dominated ramp environment. This is the first report of late Osagean crinoids from this depositional setting on the eastern side of the Eastern Interior Basin of the midcontinental United States. The Muldraugh crinoid fauna contains 66 species and is dominated by advanced cladids. This fauna has similarities to other late Osagean faunas but is distinctive both in species abundance and rank order abundance of species. Eight new species are described from this fauna, includingCamptocrinus nudus, Paradichocrinus ramus, Poteriocrinites horowitzi, Parascytalocrinus pentagonus, Abrotocrinus debrae, Abrotocrinus springeri, Worthenocrinus hardinensis, andMespilocrinus myllos.

scholarly journals Synthesis of propylene carbonate from urea and 1,2-propylene glycol over metal carbonates

2011 ◽  
Vol 17 (3) ◽  
pp. 323-331 ◽  
Author(s):  
Jiancheng Zhou ◽  
Wu Dongfang ◽  
Birong Zhang ◽  
Yali Guo
Keyword(s):  
Reaction Time ◽  
Propylene Glycol ◽  
Propylene Carbonate ◽  
Reaction Temperature ◽  
Reaction Conditions ◽  
Lead Carbonate ◽  
Synthetic Process ◽  
Metal Carbonates ◽  
Optimal Reaction ◽  
Mixed Carbonate

A series of single-metal carbonates and Pb-Zn mixed-metal carbonates were prepared as catalysts for alcoholysis of urea with 1,2-propylene glycol (PG) for the synthesis of propylene carbonate (PC). The mixed carbonates all show much better catalytic activities than the single carbonates, arising from a strong synergistic effect between the two crystalline phases, hydrozincite and lead carbonate. The mixed carbonate with Pb/Zn=1:2 gives the highest yield of PC, followed by the mixed carbonate with Pb/Zn=1:3. Furthermore, Taguchi method was used to optimize the synthetic process for improving the yield of PC. It is shown that the reaction temperature is the most significant factor affecting the yield of PC, followed by the reaction time, and that the optimal reaction conditions are the reaction time at 5 hours, the reaction temperature at 180 oC and the catalyst amount at 1.8 wt%, resulting in the highest PC yield of 96.3%.

Sign in / Sign up

Export Citation Format

Share Document