Oxalic acid minerals

Polyaramid Nomex Conex 200 VG P VG Oxalic acid, mineral acids, acid salts... 

Bitter-erde, /. magn a. -harz, n, bitter resin, -holz, n. bitterwood quassia, -kalk, -kalk-spat, m, dolomite, -keit,/. bitterness, -klee, m. buck bean (Menyanthes). -kleesalz, n. oxalic acid, -kochsalz, n. magnesium chloride, bitterlich, a. bitterish, — adv. bitterly. Bitterling, m. bitter mineral water, bitterlos, a. free from bitterness,... 

Acidolysis is a similar weathering reaction to hydrolysis in that is used to weather minerals, but in this case the source of is not water but organic or inorganic acids. Humic and fulvic acids (discussed in Section 8.3.2), carbonic acid, nitric or sulfuric acid, and low-molecular-weight organic acids such as oxalic acid can all provide H to weather minerals. All of these acids occur naturally in soils in addition nitric and sulfuric acid can be added to soil by acid pollution. The organic acids are prevalent in the... 

Peroxides, organic Phosphorus (white) Potassium chlorate Potassium perchlorate Potassium permanganate Silver Acids (organic or mineral), avoid friction, store cold Air, oxygen Acids (see also chlorates) Acids (see also perchloric acid) Glycerol, ethylene glycol, benzaldehyde, sulphuric acid Acetylene, oxalic acid, tartaric acid, fulminic acid (produced in ethanol — nitric acid mixtures), ammonium compounds... 

The study of the catalytic wet peroxide oxidation of p-coumaric acid over (Al-Fe)PILC has shown a complete removal of aromatic compounds and high TOC reduction (ca.50%) in 4 hours of reaction, leading at the end to total mineralization products (C02 and H20) and traces of oxalic acid. 

The reagent scheme used in the pilot plant included oxalic acid-acidified silicate Na2SiF6 gangue depressant system and collector composed of a mixture of phosphoric esters and alkyl sulphate modified with mineral oil. The metallurgical results obtained are presented in Table 23.5. 

Resorption of the required mineral substances from food usually depends on the body s requirements, and in several cases also on the composition of the diet. One example of dietary influence is calcium (see p. 342). Its resorption as Ca is promoted by lactate and citrate, but phosphate, oxalic acid, and phytol inhibit calcium uptake from food due to complex formation and the production of insoluble salts. 

Little agreement has been reached as to which dietary components or which food processes physiologially affect mineral availability. Many plant foods contain phytic acid, oxalic acid or other dietary fiber components that can be shown to chelate minerals. The effect of these dietary substances upon the final bioavailability of the mineral in question will depend upon the digestibility of the chelate (106). 

When an electrolyte which is without action on vanadium at ordinary temperatures (for example, dilute solutions of mineral acids, of oxalic acid, or of potassium halides) is electrolysed with a vanadium anode, a complex tetravalent vanadium ion is produced. Similarly, electrolysis at 100° C. and in molten chlorides of sodium or zinc gives rise to complex tetravalent vanadium ions. The E.M.F. in each case is found to be independent of the nature of the electrolyte. When, however, solutions of caustic soda or of caustic potash are employed, the vanadium dissolves as a pentavalent ion, irrespective of variations... 

Formic and oxalic acids and their salts in the presence of mineral acid reduce arsenic acid and arsenates the reaction is accelerated by boiling.10 Tartaric acid does not appear to form complexes with arsenic acid 11 such as are formed with arsenious acid. Certain sugars, namely fructose and less rapidly sucrose, but not glucose, maltose or lactose, form labile esters of arsenic acid during fermentation in the presence of this acid the reaction is purely a chemical one and not biochemical.12... 

Phytic acid, although restricted to a more narrow range of food products, mainly grains, complexes a broader spectrum of minerals than does oxalic acid. Decreased availability of P is probably the most widely recognized result of excessive intakes of phytic acid, yet Ca. Cu, Zn, Fe. and Mn are also complexed and rendered unavailable hy this compound. High intakes of both calcium and vitamin D help to offset ihe deleterious effects of oxalates. 

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