Nitro, acids cellulose

Amino benzoic acid 4-Nitro- benzoic acid Cellulose- F254 (Merck) 2-Mthyl propan- l-ol water 5M ammonia (700 30 15) (1) 10% w/v of amino-benzoic acid (2) 0.020% w/v of 4-nitro benzoic acid [in EtOH (96%)] UV-Light (254 nm) Spot obtained with soln. (1) for impurity should not be more than the spot with soln. (2)... 

Certain esters of nitric acid (cellulose nitrate, glyceryl trinitrate) are often referred to as nitro compounds (nitrocellulose, nitroglycerin), but this terminology should be avoided. 

Nitro (N-) cellulose was prepared by nitrizing the C-cellu-lose with the mixtures of sulfuric and nitric acid solution with various concentration ratios. 

Benzimidazole derivatives, III, 161 Benzimidazole rule of rotation, I, 21 1,3-Benzodioxan, 8,8 -methyIenebis(6- nitro-), III, xvii Benzoic acid, cellulose esters, I, 320 labelled with isotopic C, III, 231 starch esters, I, 302, 303 —, 2,4-dihydroxy-, effect on conductivity of boric acid, IV, 195 —, 2,4,5-trihydroxy-, effect on conductivity of boric acid, IV, 195 —, 3,4,5-trihydroxy-. See Gallic acid. 

Other possibilities are the reduction of nitro groups by applying the sample solutions to adsorbent layers containing zinc dust and then exposing to hydrochloric acid vapors [110] 3,5-Dinitrobenzoates and 2,4-dinitrophenylhydrazones can also be reduced in the same way on tin-containing silica gel phases [111] Cellulose layers are also suitable for such reactions [112] Seiler and Rothweiler have described a method of trans-salting the alkali metal sulfates to alkali metal acetates [113]... 

Fluorescent cellulose triacetate membranes were prepared by incorporation of pyrene-butyric acid (219), and were applied to in situ detection of ground water contamination by explosives, based on fluorescence quenching by the nitro groups LOD 2 mg/L of DNT (220) and TNT (221) and 10 mg/L for RDX (276) the response follows the Stern-Volmer law for DNT and TNT442. 

Other explosives, discovered in the nineteenth century, were nitroglycerine, a liquid that is absorbed in a solid to make dynamite, and nitrocellulose, a solid that produces less smoke (smokeless powder). They are made by heating glycerine and cellulose with nitric acid, a process that adds nitro (-NO2) groups. Another important explosive is trinitrotoluene, made by heating (very carefully) toluene in nitric acid,... 

Nitric acid Nitric acid Nitro starch Nitro starch Nitrocellulose Mitrated cornstarch Improvised explosive mixture Nitrated cellulose, Gun cotton, CeUulosetrinitrate... 

The recent systematic investigations carried out by Newman et al. [37] were devoted to the viscosity, sedimentation, diffusion and osmotic pressure of nitro-celluloses prepared by nitrating non-purified cotton, purified cotton, and viscose fibres with mixed add containing phosphoric acid and phosphoric anhydride. 

NITRIC ESTERS OF POLYSACCHARIDES OTHER THAN CELLULOSE. NITRO-DERIVATIYES OF LIGNIN AND ABIETIC ACID... 

Centrifuging has been used extensively in chemical industries, including the manuf of expls. For example in the DuPont method of manuf of NC(See this vol of Encyclopedia, under Cellulose, Nitro Manufacture), the sepn of NC from the spent nitrating acid is done by centrifuging. Another example is the sepn of TNT crysts from "sellite soln(Na2S03 in water) and then from wash water, which will be described under Toluene, Trinitro Manufacture. It can be done by centrifugation or by vacuum. filtration using a "Nutsch ... 

Nitrocellulose is a generic name for a product produced by the reaction of cellulosic materials with nitric acid and thereby containing the nitro group. 

In 1833 Braconnot obtained nitric esters of cellulose and starch by acting with nitric acid on plant fibres and starch, at low temperature, hi 1834 Mitscherlich nitrated benzene to nitrobenzene. But it is only since 1842, when Zinin reduced nitrobenzene to aniline, that rapid development of the chemistry of nitro compounds and their application to organic industry has occurred. 

When formed on cellulose [thin-layer-chromatography (TLC) plates], the colored forms of 6-nitro-8-methoxyBIPS and of trimethylindolinospironaphthoxa-zine are stabilized against thermal or photoerasure by interaction with nickel or zinc salts of hydroxy carboxylic acids or dicarboxylic acids. The zinc salts of 1-hydroxy-... 

Correct chemical term for what is commonly but erroneously called nitrocellulose. The product formed by action of a mixture of nitric and sulfuric acids on cellulose is an ester and not a nitro compound, having the empirical formula [CeH702(0N02)aix. 

Photoresponsive membranes of cellulose-2,4-diacetate incorporating 6-nitro-l, 3, 3 -trimethylspiro-(2H-l-benzopyran-2,2 -indoline) have been prepared and chiroptical and fluorescence properties of optically active co-polymers of acenaphthalene with methyl acrylate/methacrylate have been investigated. Marked optical activity is induced in the aromatic units only for the co-polymer with methyl methacrylate. This difference in behaviour is associated with an overall higher main-chain flexibility and conformational freedom in acrylates compared with methacrylates. Photoisomerization in polyurethanes containing azo-links has been found to be dependent upon the thermal history of the polymer, and photoisomerization of linoleic acid and... 

Consider the data in Table 12.1. The four values of T represent four temperatures, increasing in equal steps, of nitration of cellulose in mixed acid of four different water contents, represented by W, this also varying in equal steps. The dependent variable whose values are given in the table is the viscosity of. the resulting nitro-cellulose. 

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