Tall oil - Tall oil

Japanese: トール油 - とーるゆ（英語表記）tall oil

When pulp is produced by the Kraft process, the raw pulp material is digested with sodium hydroxide and the fibers are separated. This refers to a mixture of by-products such as fatty acids (45-50%), resin acids (rosin, 30-45%), and unsaponifiable matter (alcohols, hydrocarbons, 5-30%). It is usually separated into tall oil fatty acids and tall oil rosin by reduced pressure steam fractional distillation.

[Kazuo Fukuzumi]

Tall Oil Fatty Acids

The yield is about 30%. Its quality is more than 95% fatty acid and less than 5% unsaponifiable matter. The majority is produced in the United States. The main components are oleic acid and linoleic acid, and it does not contain any polyunsaturated fatty acids higher than linolenic acid, and the amount of saturated fatty acids is extremely small. It also contains very small amounts of unique fatty acids. It is used to manufacture azelaic acid, oleic acid, and linoleic acid for paint resins such as alkyd resins.

[Kazuo Fukuzumi]

Tall Oil Rosin

The main component is abietic acid type resin acid. It is used as a paper sizing agent, a synthetic rubber emulsifier, printing ink, paint, etc.

[Kazuo Fukuzumi]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

クラフト法でパルプを製造する際、パルプ原料を水酸化ナトリウムなどで蒸解し、繊維を分別するとき、副生する脂肪酸（45～50％）、樹脂酸（ロジン、30～45％）、不けん化物（アルコール、炭化水素類、5～30％）などの混合物をいう。通常、減圧水蒸気分留によりトール油脂肪酸とトール油ロジンに分離する。

［福住一雄］

トール油脂肪酸

収率は3割程度。その品質は脂肪酸95％以上、不けん化物5％以下。過半はアメリカで生産される。主要成分はオレイン酸とリノール酸で、リノレン酸以上の多不飽和脂肪酸を含まず、飽和脂肪酸量もきわめて少ない。またきわめて少量の特異な脂肪酸を含む。アルキド樹脂など塗料樹脂用に、アゼライン酸、オレイン酸、リノール酸製造などに使われる。

［福住一雄］