Aldehydes higher fatty

Solids. —It may Idc a hydrocM bon (c .g., paraffin wa, naphthalene) highei alcohol eg., cetyl alcohol) aldehyde e.g., z5-hydroxybenzaldehyde) ketone and qiiinonc e.g., benzo-phenone, camphor) acid (higher fatty, e.g., palmitic acid or aromatic acid) ester (of glycerol, phenols or aromatic alcohols) phenol e.g., thymol),... 

The following are the general methods by which the higher fatty aldehydes may be produced. 

Hydrogenation of carbon oxides with iron, cobalt, or nickel catalysts (Fischer-Tropsch process). Hydrocarbons are the main products Recovery and separation of oxygenated products obtained from CO and H2 Partial oxidation of nonaromatic hydrocarbon mixtures, e.g., petroleum, paraffins, and natural gas, to produce a mixture of products, such as esters, acids, aldehydes, ketones, and alcohols. This also includes higher fatty acids from petroleum and patents on formaldehyde production... 

In gas chromatographic analysis of methyl esters of higher fatty acids, substances are often recorded which are identified as esters of branched-chain acids, on the basis of their retention times. In reality they are dimethylacetals of aldehydes. The presence of such compounds in methyl esters can be quickly demonstrated through adsorption TLC. 

The fruit peel is often coated with a waxy layer. In addition to the esters of higher fatty acids with higher alcohols, these waxes contain hydrocarbons, free fatty acids, free alcohols, ketones and aldehydes. The ester fraction in apples and grapes predominantly consists of alcohols of 24, 26 and 28 carbons, but their fatty acid patterns differ. Ap-... 

Alcohol dehydrogenases are quite specific to the substrate and reduce higher aldehydes (>05) very slowly. For this reason, the content of higher (fatty) alcohols in alcoholic beverages, as well as in fruits and vegetables, is relatively low and the main products of fatty add oxidation are aldehydes and not alcohols. 

Schimmel Co. have prepared a number of fatty aldehydes bj a modification of this reaction. They distilled mixtures of barium formate with the barium salt of the corresponding acid, in a vacuum, as it was well known that this increases the yield when working with the higher aldehydes, which volatilise with difficulty. 

Lithium chloride is soluble in many organic solvents 1 among them are alcohols, such as methyl alcohol, ethyl alcohol, higher alcohols, and glycerol aldehydes and ketones, such as acetaldehyde, paraldehyde, and acetone fatty acids, such as formic acid and acetic acid nitriles, such as acetonitrile and propionitrile phenol and bases, such as pyridine. Solution is sometimes accompanied by evolution of heat and formation of compounds, examples of those isolated 2 being... 

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