Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Maule reaction

The steps comprising the Maule reaction may be portrayed as follows (Meshitsuka and Nakano 1978, Iiyama and Pant 1988) ... [Pg.26]

When isolated lignins, such as milled wood lignin and hydrochloric acid lignin, are subjected to the Maule reaction, the colored solutions may be collected by filtration immediately after the reaction and their absorption spectra measured. Typical visible spectra for milled wood lignin often after undergoing the Maule reaction are shown in Fig. 2.1.1. [Pg.29]

A chlorine solution is prepared by bubbling chlorine gas into ice-cold water. This solution is added to wood meal or wood slices in a small glass-stoppered Erlenmeyer flask. After 10min, the solution is discarded and the sample is rinsed twice with water. On subsequent treatment with 4% sodium sulfite solution, color appears which is similar to that observed in the Maule reaction,... [Pg.29]

Fig. 2.1.1. Absorption spectra of beech milled wood lignin after Maule reaction (1% KMn04 followed by 3% HC1 for 1 min (---), 5 min (-----) and 20min (...)... Fig. 2.1.1. Absorption spectra of beech milled wood lignin after Maule reaction (1% KMn04 followed by 3% HC1 for 1 min (---), 5 min (-----) and 20min (...)...
The Mauie Coior Reaction. The procedure for this test consists basically of three sequential treatments of lignilied material with 1% potassium permanganate, 3% hydrochloric acid, and concentrated ammonium hydroxide. A red-purple color develops for hardwoods and a brown color for softwoods. The steps comprising the Maule reaction may be represented as follows (23,24) ... [Pg.4240]

Turecek F (2003) Transient Intermediates of Chemical Reactions by Neutralization-Reioniza-tion Mass Spectrometry. 225 75-127 Ublacker GA, see Maul JJ (1999) 206 79-105 Uemura S, see Nishibayashi Y (2000) 208 201-233 Uemura S, see Nishibayashi Y (2000) 208 235-255... [Pg.239]

Matzke technique, 72 10 Maule color reaction, 75 7 Maumee saccharin process, 24 235 Mauritius hemp, 77 296 Mavik, molecular formula and structure, 5 151t... [Pg.555]

Lubineau A,Aug6 J (1999) Water as Solvent in Organic Synthesis. 206 1-39 Loupy A (1999) Solvent-Free Reactions. 206 153-207 March NH (1999) Localization via Density Functionals. 203 201-230 Maul J J, Ostrowski PJ, Ublacker GA, Linclau B, Curran DP (1999) Benzotrifluoride and Derivates Useful Solvents for Organic Synthesis and Fluorous Synthesis. 206 79-105 McDonnell KA, see Imperial B (1999) 202 1-38... [Pg.229]

Leitner W (1999) Reactions in Supercritical Carbon Dioxide (scCO2).206 107-132 Levitzki A (2000) Protein Tyrosine Kinase Inhibitors as Therapeutic Agents. 211 1-15 Li X, see Paldus ] (1999) 203 1- 20 Linclau B, see Maul JJ (1999) 206 79-105... [Pg.227]

Iiyama K, Pant R (1988) The mechanism of the Maule colour reaction Introduction of methylated syrmgyl nuclei into softwood lignin Wood Sci Technol 22 167-175 Lindgren BO, Mikawa H (1957) The presence of cinnamyl alcohol groups in lignin Acta Chem Scand II 826-835... [Pg.32]

Meshitsuka G, Nakano J (1978) Studies on the mechanism of lignin color reaction XII Maule color reaction Mokuzai Gakkaishi 24 563-568... [Pg.32]

See other pages where Maule reaction is mentioned: [Pg.140]    [Pg.24]    [Pg.26]    [Pg.27]    [Pg.28]    [Pg.300]    [Pg.302]    [Pg.140]    [Pg.24]    [Pg.26]    [Pg.27]    [Pg.28]    [Pg.300]    [Pg.302]    [Pg.651]    [Pg.139]    [Pg.425]    [Pg.339]    [Pg.264]    [Pg.83]    [Pg.229]    [Pg.651]    [Pg.476]    [Pg.29]    [Pg.329]    [Pg.257]    [Pg.31]    [Pg.351]    [Pg.7]    [Pg.15]   
See also in sourсe #XX -- [ Pg.26 , Pg.29 ]



SEARCH



The Maule Color Reaction

© 2024 chempedia.info