New method for preparation of anhydrides and amides of carboxylic acids using carbon tetrachloride

1978 ◽  
Vol 27 (1) ◽  
pp. 193-196
Author(s):  
J. Weiss ◽  
F. Havelka ◽  
B. K. Nefedov
Keyword(s):  
Carbon Tetrachloride ◽  
Carboxylic Acids ◽  
New Method ◽  
Amides Of Carboxylic Acids

Synthesis of phosphorus-substituted amides of carboxylic acids containing 2,6-di-tert-butylphenol fragments

2009 ◽  
Vol 79 (1) ◽  
pp. 152-154
Author(s):  
A. A. Prishchenko ◽  
M. V. Livantsov ◽  
O. P. Novikova ◽  
L. I. Livantsova ◽  
E. R. Milayeva
Keyword(s):  
Carboxylic Acids ◽  
Amides Of Carboxylic Acids

ChemInform Abstract: A New Method for the Protection of Carboxylic Acids with a Triisopropylsiloxymethyl Group.

ChemInform ◽  
2013 ◽  
Vol 44 (12) ◽  
pp. no-no
Author(s):  
Hikaru Yoshimura ◽  
Kohei Eto ◽  
Keisuke Takahashi ◽  
Jun Ishihara ◽  
Susumi Hatakeyama
Keyword(s):  
Carboxylic Acids ◽  
New Method

ChemInform Abstract: N-(1-Aryl-2,2,2-trihaloethyl)amides of Carboxylic Acids.

ChemInform ◽  
2010 ◽  
Vol 22 (18) ◽  
pp. no-no
Author(s):  
YA. G. BAL'ON ◽  
V. A. SMIRNOV
Keyword(s):  
Carboxylic Acids ◽  
Amides Of Carboxylic Acids

A new method for the preparation of peroxymonophosphoric acid

2003 ◽  
Vol 81 (2) ◽  
pp. 156-160 ◽  
Author(s):  
Tian Zhu ◽  
Hou-min Chang ◽  
John F Kadla
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Carbon Tetrachloride ◽  
Glacial Acetic Acid ◽  
Acid Synthesis ◽  
Conversion Ratio ◽  
New Method ◽  
Phosphorous Pentoxide ◽  
Preparation Conditions ◽  
Peroxy Acids

A new method for the preparation of peroxymonophosphoric acid (H3PO5) has been developed. It utilizes a biphasic solution to moderate the vigorous reaction between phosphorous pentoxide (P2O5) and hydrogen peroxide (H2O2). P2O5 is suspended in carbon tetrachloride (CCl4), and concentrated H2O2 is slowly added while being vigorously stirred at low temperature. Careful control of the reaction temperature through the slow addition of H2O2 is critical. Using typical preparation conditions (P2O5:H2O2 = 0.5:1, H2O2 70 wt %, 2°C, 120–180 min), ~70% of the H2O2 is effectively converted to H3PO5. Increasing the concentration of H2O2, as well as the mole ratio of P2O5:H2O2, leads to an even higher % conversion of H2O2 to H3PO5. The addition of glacial acetic acid to the P2O5:H2O2 suspension at the end of the 120–180 min reaction (P2O5:H2O2:CH3COOH = 0.5:1:0.3) leads to the formation of peracetic acid in addition to H3PO5, and to an overall increase in the conversion ratio of total peroxy acids based on H2O2 (>95%).Key words: peroxymonophosphoric acid, synthesis, stability, conversion ratio.

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