Cellulose, Methyl Ester

Of these dimethyl phthalate (DMP) is used in most compositions. It is cheap, has a high compatibility with secondary cellulose acetate and is efficient in increasing flexibility, toughness and the ease of flow at a given temperature. Its principal disadvantages are its high volatility and the fact that it increases the flammability of the compound. Similar in compatibility but rather less volatile is diethyl phthalate. This material has less of an influence on flexibility and flow properties than the methyl ester. 

A phosphate-free detergent with excellent detergency and improved foaming and rinsing properties consists of 10% sodium a-sulfo hardened beef tallow fatty acid methyl ester, 10% sodium dodecyl sulfate, 5% a-sulfomyristic acid disodium salt, 10% zeolite, 10% sodium silicate, 10% sodium carbonate, 10% cellulose, 40% Flauber s salt, and 4% water [80]. 

Uses Solvent for nitrocellulose, ethyl cellulose, polyvinyl butyral, rosin, shellac, manila resin, dyes fuel for utility plants home heating oil extender preparation of methyl esters, formaldehyde, methacrylates, methylamines, dimethyl terephthalate, polyformaldehydes methyl halides, ethylene glycol in gasoline and diesel oil antifreezes octane booster in gasoline source of hydrocarbon for fuel cells extractant for animal and vegetable oils denaturant for ethanol in formaldehyde solutions to inhibit polymerization softening agent for certain plastics dehydrator for natural gas intermediate in production of methyl terLbutyl ether. 

Lipids can be identified and quantified using thin-layer chromatography (TEC) and gas chromatography (GC) (Galliard, 1968). Extraction of lipids is achieved by homogenizing potato tubers with isopropanol in a blender, followed by a series of filtrations and extractions with chloroform-methanol (2 1). Chloroform is removed by rotary evaporation and the residue is redissolved in benzene-ethanol (4 1). This extract is passed through a DEAE-cellulose column, and the fractions collected are subjected to TEC on 250 p,m layers of silica gel G, using three solvent systems. Fatty acid methyl esters for GC analysis are prepared by transmethylation of the parent lipids, or by diazomethane treatment of the free fatty acids released by acid... 

On the other hand, numerous observations favour the opinion that the solvent enters into a chemical combination with nitrocellulose to form solvates. Some of those solvates are stable only at low temperatures. For instance, cellulose dinitrate does not dissolve in methyl alcohol at room temperature, though on cooling it does so. The cellulose nitric ester precipitates again when the solution is heated. Similar behaviour is observed with ethyl alcohol a lower temperature causes nitrocellulose to swell or even to dissolve more readily. The solvent seems likely to be bound to free hydroxyl radicals (Highfield [36]). The hypothesis explains why nitrocellulose is soluble in a mixture of ether and alcohol, though neither of these solvents, when used separately, is capable of dissolving it. It is assumed that first an alcohol solvate of nitrocellulose is formed which then dissolves in the ether. 

Chiralcel OJ Cellulose tris(4-methyl benzoate) Aryl methyl esters, aryl methoxy esters ... 

FIGURE 9 Chromatograms of enantiomeric resolution on cellulose triacetate CSPs. (a) /V-Benzoylalanine methyl ester, with hexane-ethanol (80 20, v/v) as the mobile phase, (b) Benzoin with hexane-2-propanol-water (70 27 3, v/v/v) as the mobile phase, (c) Mandelic acid with ethanol as the mobile phase. (From Ref. 9.)... 

The methyl ester of oxycellulose, produced by alkaline permanganate oxidation of cuprammonium cellulose followed by treatment with diazomethane, has been reacted with protein by the azide method [34]. Acidic oxyce]]uloses are aiso able to react with alcohols and amines, including proteins, to form esters or amide derivatives. 

A side effect of a lack of temperature control is that changes can alter the refractive index of the mobile phase, causing basehne disturbances and reducing sensitivity The problem is principally with refractive index detection [39], but it can also influence spectroscopic detectors and their light path can be distorted. Temperature has also been reported to alter the nature of some stationary phases. For example, it caused a change in the chiral selectivity of the resolution of dihydropyrimidone acid and its methyl ester on amylose and cellulose stationary phases [40],... 

Liquid fuels play a key role in modem lifestyles. Their liquid nature offers convenience in being transportable and easy to use. Diesel, spark-ignition and Jet engines are the result of this convenience. Unfortunately, the hydrocarbons, which play the major role as liquid fuel are finite, and upon combustion contribute to the accumulation of carbon dioxide in the atmosphere. It is not surprising that alternate renewable liquid fuels are receiving attention. These include ethanol, methanol, fatty acid methyl esters and fast pyrolysis oils. All can be produced from renewable resources. Ethanol may be formed by fermentation of sugars and thereby indirectly from cellulose and starches. Methanol can be produced from carbon monoxide and... 

Methyl ester cysteine addition. 11 g of methyl ester cysteine (8.2 X 10 mole) and 12 ml of oxydized cellulose (or corn-stick powder) were added and incubated over 3 h (or 24 h for corn-stick powder). 

Cellulose, 2-hydroxyethyl methyl ester Culminal MHEC HEMC hydroxyethyl methylcellulose hymetellose MHEC methylhydroxyethylcellulose Tylopur MH-, Tylopur MHB Tylose MB Tylose MH Tylose MHB. 

The effect of the degree erf polarization of the ester linkages in low-molecular-weight esters on their reactivity has been examined by studying the reaction of alcoholysis, with cellulose, of methyl esters of benzoic, p-chloro-, p-hydroxy, p-hydroxy-, p- and o-nitrobenzoic acids, and those of phenyl-, phenoxy-, 2,4-dichlorophenoxy- and monochloro-acetic adds. The trans-esterification reaction was carried out in non-aqueous dimeih ylformamide in the presence of catalysts (sodium methylate, cadmium acetate, p-toluenesulphonic add) at 110-140° C. 

The reaction of cotton cellulose with phenyl isocyanate, to give a cellulose phenylurethan, has been investigated further. The extent of the reaction depends on the ability of the solvent to swell the cellulose, methyl sulfoxide being the best medium, followed by i r,f T-dimethylformamide and P3Tidine. The reaction is catalyzed by the addition of di-w-butyltin diacetate, but toluene 2,4-diisocyanate and 1,2,4,5-tetramethylbenzene diisocyanate do not show high reactivity. A survey of the relative behavior of chitin and cellulose toward esterification under comparable conditions, mainly to give arylsulfonate esters, concluded that, of the two, chitin is the less reactive. 

A13-00525 Benzoic acid, methyl ester CCRIS 5851 Clorius EINECS 202-259-7 Essence of niobe FEMA No, 2683 HSDB 5283 Methyl benzenecarboxylate Methyl benzoate Methylester kyseliny benzoove Niobe oil NSC 9394 Oil of niobe UN2938. Used in perfumery, as a solvent for cellulose esters and ethers, resins, rubber flavoring. Liquid mp = -15° bp = 199° d = 1.0933 insoluble in H2O, soluble in organic solvents Xm = 228,272,280 nm (s = 11000, 830, 686, MeOH) LDso (rat orl) n 1177 mg/kg. Lancaster Synthesis Co. Morflex Penta Mfg. Pentagon Chems. Ltd Sybron. 

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