The influence of aliphatic amines, diamines, and amino acids on the polymorph of calcium carbonate precipitated by the introduction of carbon dioxide gas into calcium hydroxide aqueous suspensions

2014 ◽  
Vol 386 ◽  
pp. 119-127 ◽  
Author(s):  
Wittaya Chuajiw ◽  
Kazumasa Takatori ◽  
Teruki Igarashi ◽  
Hiroki Hara ◽  
Yoshiaki Fukushima
Keyword(s):  
Carbon Dioxide ◽  
Amino Acids ◽  
Calcium Carbonate ◽  
Calcium Hydroxide ◽  
Aliphatic Amines ◽  
Aqueous Suspensions ◽  
Carbon Dioxide Gas

Controlled preparation of micro–nano hierarchical hollow calcium carbonate microspheres by pressurized-CO2 carbonization and their CaCO3:Eu3+ photoluminescence properties

CrystEngComm ◽  
2021 ◽  
Vol 23 (16) ◽  
pp. 3033-3042
Author(s):  
Liubin Shi ◽  
Mingde Tang ◽  
Yaseen Muhammad ◽  
Yong Tang ◽  
Lulu He ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Calcium Carbonate ◽  
Calcium Hydroxide ◽  
Hierarchical Structure ◽  
Ethylenediaminetetraacetic Acid ◽  
Disodium Salt ◽  
Hollow Microspheres ◽  
Photoluminescence Properties ◽  
Controlled Preparation

Herein, calcium carbonate hollow microspheres with a micro–nano hierarchical structure were successfully synthesized using disodium salt of ethylenediaminetetraacetic acid (EDTA-2Na) as an additive, by bubbling pressurized carbon dioxide and calcium hydroxide at 120 °C.

PYOCYANINE FORMATION FROM LABELLED SUBSTRATES BY PSEUDOMONAS AERUGINOSA

1957 ◽  
Vol 3 (2) ◽  
pp. 165-169 ◽  
Author(s):  
A. C. Blackwood ◽  
A. C. Neish
Keyword(s):  
Carbon Dioxide ◽  
Amino Acids ◽  
Pseudomonas Aeruginosa ◽  
Calcium Carbonate ◽  
Specific Activity ◽  
The Other ◽  
Specific Activities ◽  
Carbonate Salts ◽  
Cell Carbon

Pseudomonas aeruginosa was grown under conditions suitable for pyocyanine production in a medium containing glycerol, L-leucine, DL-alanine, calcium carbonate, salts, and small amounts of various C14-labelled substrates. A comparison of the specific activities of the cell carbon, respiratory carbon dioxide, and pyocyanine carbon showed that glycerol and dihydroxyacetone were the only substrates from which pyocyanine having a specific activity higher than the cell carbon was formed. Glucose, fructose, pyruvate, acetate, and the 13 amino acids tested were inferior in this respect. Alanine, leucine, isoleucine, and glycine were incorporated into pyocyanine more readily than the other amino acids. Phenylalanine and tyrosine, although possessing preformed rings, were poor precursors of pyocyanine and were oxidized more readily than they were assimilated. These results suggest that pyocyanine originates from trioses but gives little indication of the nature of the intermediates.

Solidification of Greenhouse Gas Carbon Dioxide

2014 ◽  
Vol 472 ◽  
pp. 879-883
Author(s):  
Wei Yin
Keyword(s):  
Carbon Dioxide ◽  
Calcium Carbonate ◽  
Ambient Temperature ◽  
Calcium Sulfate ◽  
Exothermic Reaction ◽  
Ammonium Bicarbonate ◽  
Second Order Reaction ◽  
Carbon Dioxide Gas ◽  
Water Media ◽  
Closed Reactor

The feasible routine of carbon dioxide solidification is developed, which employs carbon dioxide with calcium sulfate and ammonia to obtain calcium carbonate and ammonium sulfate at ambient temperature. The process of carbon dioxide solidification is a spontaneous and exothermic reaction, whose possesses the rate constants of the second order reaction, which can be attributed to carbon dioxide gas dissolving the water media and carbon dioxide reacted with ammonia to produce ammonium bicarbonate. Calcium sulfate changing rapidly into calcium carbonate accelerates the process of reaction of carbon dioxide reacted with ammonia. The optimization process parameters of carbon dioxide solidification are a 0.075-MPa of CO2, a 0.5-mol of CaSO4·2H2O, a 0.5-mol of NH3·H2O and a 100-ml of H2O in a closed reactor, which is able to obtain 100% CO2 gas solidification efficiency within 4 minutes at ambient temperature.

Equilibria of Reactions Between Nitrogen Oxides and Calcium Hydroxide

1995 ◽  
Vol 60 (5) ◽  
pp. 751-762
Author(s):  
Emerich Erdös ◽  
Karel Mocek
Keyword(s):  
Carbon Dioxide ◽  
Water Vapor ◽  
Calcium Carbonate ◽  
Nitrogen Oxides ◽  
Calcium Hydroxide ◽  
Nitrogen Monoxide ◽  
Equilibrium Equations ◽  
Gaseous Nitrogen ◽  
Chemical Equilibria ◽  
Partial Pressures

A general analysis of chemical equilibria in a system consisting of the gaseous nitrogen monoxide, nitrogen dioxide, water vapor, carbon dioxide, oxygen, and the solid calcium hydroxide is carried out with respect to the equilibrium partial pressures of nitrogen oxides. The conditions are defined, under which the calcium hydroxide is transformed to the calcium carbonate. The corresponding equilibrium equations are derived for all nine regions of existence of described system. The results are illustrated graphically and discussed from the point of removing the nitrogen oxides from waste gases.

scholarly journals Catalyst free N-formylation of aromatic and aliphatic amines exploiting reductive formylation of CO2 using NaBH4

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25777-25787
Author(s):  
Arun Kumar ◽  
Pankaj Sharma ◽  
Nidhi Sharma ◽  
Yashwant Kumar ◽  
Dinesh Mahajan
Keyword(s):  
Carbon Dioxide ◽  
Sodium Borohydride ◽  
Aliphatic Amines ◽  
Catalyst Free ◽  
Carbon Dioxide Gas ◽  
Aromatic And Aliphatic Amines

Herein, we report a sustainable approach for N-formylation of aromatic as well as aliphatic amines using sodium borohydride and carbon dioxide gas.

Exogenous Directing Group Free, Ligand-Enabled gamma-C(sp3)–H Arylation of Free Primary Aliphatic Amines and α-Amino Esters

2019 ◽  
Author(s):  
Yongzheng Ding ◽  
Shuai Fan ◽  
Xiaoxi Chen ◽  
yuzhen gao ◽  
Gang Li
Keyword(s):  
Amino Acids ◽  
Large Scale ◽  
Free Ligand ◽  
Aliphatic Amines ◽  
Rapid Synthesis ◽  
Amino Esters ◽  
Directing Group ◽  
Large Scale Synthesis ◽  
Primary Aliphatic Amines

A Pdᴵᴵ-catalyzed, ligand-enabled gamma-C(sp3)–H arylation of free primary aliphatic amines and amino esters without using an exogenous directing group is reported. This reaction is compatible with unhindered free aliphatic amines, and it is also be applicable to the rapid synthesis of biologically and synthetically valuable unnatural α-amino acids. Large scale synthesis is also feasible using this method.<br>

Enhancement of desorption amount of carbon dioxide gas from monoethanolamine solution using ultrasound and calcium chloride

2020 ◽  
Vol 59 (SK) ◽  
pp. SKKD08
Author(s):  
Yuya Kitamura ◽  
Hirokazu Okawa ◽  
Takahiro Kato ◽  
Katsuyasu Sugawara
Keyword(s):  
Carbon Dioxide ◽  
Calcium Chloride ◽  
Carbon Dioxide Gas
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