Carbonic acid, magnesium salt

Carbonic acid, magnesium salt (1 1) carbonate magnesium hydromagnesite E504. See Sections 4 and 17. 

Synonyms carbonic acid, magnesium salt anhydrous (1 1) E504 magnesite. 

CARBONIC ACID, MAGNESIUM SALT (546-93-0) Violent reaction with formaldehyde. 

Carbonic acid, magnesium salt (1 1), mixture with magnesium hydroxide (Mg(OH)2), hydrate CCRIS 7884 Magnesium carbonate basic Magnesium carbonate hydroxide Marinco C. A basic magnesium carbonate of variable composition. Used in fireprooSnp, as an antacid and laxative and in manufacture of magnesium compounds. 

SYNONYMS carbonate magnesium, carbonic acid, magnesium salt, hydromagnesite, magnesium carbonate, magnesium (II) carbonate. 

Carbonic acid magnesium salt Carbonic acid magnesium salt (1 1) Carbonic acid magnesium salt (2 1). See Magnesium carbonate... 

CARBONIC ACID, BARIUM SALT (513-77-9) BaCOj Noncombustible solid. The aqueous solution is basic. Dissolves in most acids except sulfuric acid with release of CO2 gas. This could be dangerous in a confined space. Incompatible with finely divided alxuninum bromine trifluoride fluorine, 2-furanpercarboxylic acid magnesium, oxidizers, sodium azide silicon strong alkalis. Decomposes above 2372°F/1300°C, releasing COj and soluble barium salts including barium oxide. On small fires, use dry chemical powder (such as Purple-K-Powder), foam, or CO2 extinguishers. 

CARBONIC ACID, LITHIUM SALT (554-13-2) LijCOj Aqueous solution is an organic base. Violent reaction with acids. Inconpatible with fluorine, germanium, lead diacetate, magnesium, mercurous chloride, silicon, silver nitrate, titanium. Aqueous solution incompatible with organic anhydrides, acrylates, alcohols, aldehydes, alkylene oxides, substituted allyls, cellulose nitrate, cresols, caprolactam solution, epichlorohydrin, ethylene dichloride, isocyanates, ketones, glycols, nitrates, phenols, vinyl acetate. Exothermic decomposition with maleic anhydride. Corrodes aluminum, copper, zinc in the presence of moisture. On small fires, use any extinguishing agent. 

CARBONIC ACID, MONOAMMONIUM SALT (1066-33-7) CHjOj HjN NH4HCO3 Noncomustible solid (Fire Rating 1). Violent reaction with strong acids, forming carbon dioxide. Reacts with strong bases, forming ammonia. In temperatures above 140°F/49°C, ammonia and carbon dioxide fumes are formed. Reacts with fluorine, magnesium, sodium hypochlorite. 

CARBONIC ACID, BARIUM SALT (513-77-9) Incompatible with acids, finely divided aluminum, bromine trifluoride, fluorine, magnesium, oxidizers, sodium azide, silicon. 

CARBONIC ACID, CALCIUM SALT (1317-65-3) Incompatible with acids, ammonium salts, fluorine, germanium, lead diacetate, magnesium, mercurous chloride, silicon, silver nitrate, titanium. 

Unsaturated carboxylic acid magnesium salts have been obtained catalytically by reductive electrocarboxylation of a number of allenes with a L Ni(II)-complex [L = bpy, dppe, PMDTA (A,A,A W A -pentamethyldiethylene triamine)], as the catalyst, in the presence of a sacrificial magnesium anode [46, 83] (see also Sect. 5.3).However, regioselectivity was moderate. In additimi to a,p-unsaturated acids, the process afforded vinyl acetic acid derivatives, involving carboxylation of a terminal carbon of allene moiety, and di-carboxyUc acids. Catalytic double... 

During natural deposition of carbonates, when magnesium salts are present, a mixture of magnesium and calcium carbonates are precipitated, which is known as dolomite. Dolomite contains about 40 to 45 % MgCOj and 55 to 60 % CaCOg. Its properties are close to those of natural calcium carbonate, except that it is slightly denser and less bright and less sensitive to acid than calcium carbonate. 

We ve seen how Grignard reagents add to the carbonyl group of aldehydes ketones and esters Grignard reagents react m much the same way with carbon dioxide to yield mag nesium salts of carboxylic acids Acidification converts these magnesium salts to the desired carboxylic acids... 

Magnesium sulfate heptahydrate may be prepared by neutralization of sulfuric acid with magnesium carbonate or oxide, or it can be obtained directly from natural sources. It occurs abundantly as a double salt and can also be obtained from the magnesium salts that occur in brines used for the extraction of bromine (qv). The brine is treated with calcium hydroxide to precipitate magnesium hydroxide. Sulfur dioxide and air are passed through the suspension to yield magnesium sulfate (see Chemicals frombrine). Magnesium sulfate is a saline cathartic. 

Detergents are metal salts of organic acids used primarily in crankcase lubricants. Alkylbenzenesulfonic acids, alkylphenols, sulfur- and methjiene-coupled alkyl phenols, carboxyUc acids, and alkylphosphonic acids are commonly used as their calcium, sodium, and magnesium salts. Calcium sulfonates, overbased with excess calcium hydroxide or calcium carbonate to neutralize acidic combustion and oxidation products, constitute 65% of the total detergent market. These are followed by calcium phenates at 31% (22). 

Acidic Properties. As a typical acid, it reacts readily with alkaUes, basic oxides, and carbonates to form salts. The largest iadustrial appHcation of nitric acid is the reaction with ammonia to produce ammonium nitrate. However, because of its oxidising nature, nitric acid does not always behave as a typical acid. Bases having metallic radicals ia a reduced state (eg, ferrous and staimous hydroxide becoming ferric and stannic salts) are oxidized by nitric acid. Except for magnesium and manganese ia very dilute acid, nitric acid does not Hberate hydrogen upon reaction with metals. 

The second processing step, in which benzoic acid is oxidized and hydrolyzed to phenol, is carried out in two reactors in series. In the first reactor, the benzoic acid is oxidized to phenyl benzoate in the presence of air and a catalyst mixture of copper and magnesium salts. The reactor is operated at 234°C and 147 kPa gauge (1.5 kg/cm g uge). The phenyl benzoate is then hydrolyzed with steam in the second reactor to yield phenol and carbon dioxide. This occurs at 200°C and atmospheric pressure. The overall yield of phenol from benzoic acid is around 88 mol %. Figure 2 shows a simplified diagram for the toluene—benzoic acid process. 

Rules are provided to aid decision making at each step. The procedure is illustrated with examples including separation of amino acids, p- and / -cresols, chorobenzoic acids, calcium carbonate and magnesium oxide from dolomite, and the production of salt. 

The difference in solubility between carbonates and hydrogen carbonates is responsible for the behavior of hard water, which is water that contains dissolved calcium and magnesium salts. Hard water originates as rainwater which dissolves carbon dioxide from the air and forms a very dilute solution of carbonic acid. 

Concentration limits for chloride and acetate in PN typically are linked to limitations for sodium and potassium. The usual ratio of chloride acetate in PN is about 1 1 to 1.5 1. Chloride and acetate primarily play a role in acid-base balance. Acetate is converted to bicarbonate at a 1 1 molar ratio. This conversion appears to occur mostly outside the liver. Bicarbonate never should be added to or coinfused with PN solutions. This can lead to the release of carbon dioxide and potentially result in the formation of calcium or magnesium carbonate (very insoluble salts). 

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