PROBLEM TO BE SOLVED: To provide a hydrocarbon composition that has a reduced amount of impurities other than an intended component, and is excellent in moldability, stability, releasability, water repellency, waterproofness, and anti-blocking property and reduces an environmental load, as compared with an existing hydrocarbon composition, and to provide a method for producing the hydrocarbon composition.SOLUTION: In a fatty acid composition, (1) a content of a linear fatty acid is 30 mass% or more and 100 mass% or less, or (2) a content of a linear fatty acid is 25 mass% or more and less than 30 mass% and a branched fatty acid that comprises 2 or 3 carboxylic acids and is a liquid at 25°C is not included in the fatty acid composition or is included at a content of equal to or less than a detection limit in the fatty acid composition. A method for producing a waxy composition includes performing a decarboxylation dimerization reaction on the fatty acid composition and sequentially performing a hydrodeoxygenation reaction on the obtained aliphatic ketone.COPYRIGHT: (C)2015,JPO&INPIT【課題】既存の炭化水素組成物と比較して、目的とする成分以外の共雑物含有量が低減され、成形性、安定性、離形性、撥水性、防水性、アンチブロッキング性に優れ、環境負荷を低減した炭化水素組成物とその製造方法の提供。【解決手段】脂肪酸組成が、(1)直鎖脂肪酸の含有量が30質量%以上100質量%以下である、又は(2)直鎖脂肪酸の含有量が25質量%以上30質量%未満であり、かつ2又は3個のカルボン酸を有する25℃で液状の分岐鎖脂肪酸を含有しない若しくは含有量が検出限界以下である、脂肪酸組成物に対して、脱炭酸的二量化反応を行った後、得られた脂肪族ケトンに対して水素化脱酸素反応を行うことを特徴とする、ワックス状組成物の製造方法。【選択図】なし
