142-72-3 magnesium acetate

Processes for Triacetate. There are both batch and continuous process for triacetate. Many of the considerations and support faciUties for producing acetate apply to triacetate however, no acetyl hydrolysis is required. In the batch triacetate sulfuric acid process, however, a sulfate hydrolysis step (or desulfonation) is necessary. This is carried out by slow addition of a dilute aqueous acetic acid solution containing sodium or magnesium acetate (44,45) or triethanolamine (46) to neutrali2e the Hberated sulfuric acid. The cellulose triacetate product has a combined acetic acid content of 61.5%. 

Magnesium acetate also has uses as a dye fixative in textile printing, as a deodorant, disinfectant, an antiseptic in medicine, and as a reagent chemical (see Disinfectants AND ANTISEPTICS Textiles) (6). In the United States, Hoescht-Celanese and Tennessee Eastman are the principal producers of magnesium acetate. These companies make about 36,000 t/yr, which is largely used in-house for the production of cellulose acetate. 

S. Eu, R. C. Medmd, and 1. Y. Chan, "The Identification and Characterization of Calcium Magnesium Acetate," in Abstracts, International Symposium on Calcium Magnesium Acetate, An Emerging Bulk Chemicalfor Environmental Applications, May 14—16, Northeastern University, Boston, Mass., 1991. 

High temperature acetylation of cellulose above 50°C produces cellulose acetate from low purity wood pulp cellulose in shorter reaction times. In a high temperature method recently disclosed (102), cellulose reacts with 200—400% acetic anhydride in the presence of <5% acid catalyst at 68—85°C for 3—20 min. After the acid catalyst is neutralized with magnesium acetate, the cellulose acetate is hydrolyzed at 120°C for two hours (103). Several modified catalyst systems have been developed for acetylation of cellulose above 90°C (89,90). 

Magnesium acetate [142-72-3 (anhydr) 16674-78-5 (4H2O)] M 214.5, m 80°. Crystd from anhydrous acetic acid, then dried under vacuum for 24h at 100°... 

Reactive compatibilization of engineering thermoplastic PET with PP through functionalization has been reported by Xanthos et al. [57]. Acrylic acid modified PP was used for compatibilization. Additives such as magnesium acetate and p-toluene sulfonic acid were evaluated as the catalyst for the potential interchange or esterification reaction that could occur in the melt. The blend characterization through scanning electron microscopy, IR spectroscopy, differential scanning calorimetry, and... 

Assay of luciferin. A buffer solution of 20-50 mM Tris-HCl (pH 7.2 1.9 ml) containing 20 mM magnesium acetate and luciferase (typically 0.1 ml of the luciferase stock solution) is injected into a vial containing luciferin sample (1-10 pi) and 20 mM KCN (0.1 ml made daily in 0.1 M Tris-HCl buffer, pH 7.2), and the resulting light emission is measured in terms of total light. 

Fig. 7.2.9 Influence of cyanide and iodine on the Odontosyllis luciferin-luciferase luminescence reaction. Luciferin solution (0.1 ml) was first mixed with a HCN solution (0.1ml), and then the mixture was injected into 8 ml of 20 mM magnesium acetate containing luciferase. The concentrations of HCN shown in the figure are the final concentrations. In the control experiment, HCN was omitted. In the experiment labeled added at 0.5 min, 0.1 ml of HCN solution was injected to the control mixture 0.5 min after the start of the luminescence reaction to give a final concentration of 0.1 mM HCN. Arrows indicate the injection of a solution of I2-3KI to the control mixture to give a final concentration of 0.1 mM I2. From Shimomura et al., 1963d, with permission from John Wiley Sons Ltd.

Extraction and purification of photoprotein (Shimomura, 1986b). The live animals are chilled to 5°C, and the five arms of each specimen are cut off and dropped into cold 3.5% magnesium acetate solution. After 10 min, the arms are drained from the solution, and stored at... 

PET methanolysis involves the reaction of PET with methanol at high temperatures and pressures in the presence of transesterification catalysts such as magnesium acetate, cobalt acetate, and lead dioxide. 

Volume 2 Calcium Magnesium Acetate. An Emerging Bulk Chemical for Environmental Applications... 

Translation reaction mixture contained 20 % (v/v) wheat germ extract and the followings (final concentrations) 60 mM HEPES/KOH (pH 7.6), 1 mM ATP, 100 pM GTP, 300 pM spermidine, 2 mM magnesium acetate, 40 mM potassium acetate, 160 pM each... 

These aspects of solvent property similarly apply to precoated impregnated silica gel plates, e.g., by ammonium sulfate, silver nitrate, or magnesium acetate, as well as to microcrystalline cellulose precoated plates. On preparative RP phases, water has the lowest elution power. Therefore, more polar or aqueous solvents should be preferred. In contrast to HPTLC RP-18 layers, on which such aqueous solutions remain as a drop on the surface and are not able to penetrate through the lipophilic layer, on preparative RP phases, pnre aqneons application solutions can be apphed owing to the minor degree of C18 modification. 

Magnesium acetate bromide chlorate chloride fluorosilicate formate iodate iodide... 

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