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JP-2026075907-A - Method for extracting essential oils and the extracted essential oils and aromatic distilled water

JP2026075907AJP 2026075907 AJP2026075907 AJP 2026075907AJP-2026075907-A

Abstract

[Problem] To effectively utilize the central part of the log and to provide a novel and useful method for extracting essential oils. [Solution] An essential oil extraction method comprising the following steps: measuring the cross-sectional shape 2 of a log 1 to set an inscribed circle 3; cutting the log to obtain a central part of the log 6 whose cross-section is all or part of a concentric circle 5 with a diameter of 30 to 60 mm relative to the inscribed circle; crushing the central part of the log to obtain crushed material; distilling the crushed material to obtain a distillate; and separating the distillate into essential oil and aromatic distilled water. The core of the log can be the peeled core remaining after obtaining veneers 9 continuously with a rotary lathe. The essential oil and aromatic distilled water obtained through the separation process according to the present invention can be used for the same purposes as in the conventional method. The crushed material after essential oil extraction can be reused alone or mixed with other materials in the manufacture of wood fiberboard such as MDF or wood board such as particleboard. [Selection Diagram] Figure 2

Inventors

  • 薮谷 充浩

Assignees

  • 株式会社ノダ

Dates

Publication Date
20260511
Application Date
20241023

Claims (8)

  1. This essential oil extraction method is characterized by comprising: an inscribed circle setting step of measuring the cross-sectional shape of a log and setting the inscribed circle of the cross-section; a log center preparation step of cutting the log to obtain a log center whose cross-section is all or part of a concentric circle range with a diameter of 30 to 60 mm relative to the inscribed circle set in the setting step; a crushing step of crushing the log center to obtain crushed material; a distillation step of distilling the crushed material to obtain a distillate; and a separation step of separating the distillate into essential oil and aromatic distilled water.
  2. Furthermore, the essential oil extraction method according to claim 1 is characterized by comprising a water removal step for removing water contained in the essential oil obtained in the separation step.
  3. The essential oil extraction method according to claim 2, characterized in that the water removal step comprises a step of cooling the essential oil obtained in the separation step to a temperature below the freezing point of water and higher than the freezing point of the essential oil components, and then removing the frozen water.
  4. The essential oil extraction method according to claim 1, characterized in that the pulverized material obtained by the pulverization step is an elongated, thin, plate-shaped pulverized material having an average length of 10 to 30 mm, an average width of 3 to 10 mm, and an average thickness of 1 to 2 mm.
  5. The essential oil obtained after the separation step in the essential oil extraction method according to any one of claims 1 to 4.
  6. Aromatic distilled water obtained after the separation step in the essential oil extraction method according to any one of claims 1 to 4.
  7. Essential oil extracted from the central part of a log, with a cross-section encompassing all or part of a concentric circle with a diameter of 30-60 mm relative to the inscribed circle of the log.
  8. Aromatic distilled water extracted from the central part of a log, with a cross-section encompassing all or part of a concentric circle with a diameter of 30 to 60 mm relative to the inscribed circle of the log.

Description

This invention relates to a method for extracting essential oils from wood, and to the extracted essential oils and aromatic distilled water. Wood, especially coniferous wood such as cypress, contains a large amount of phytoncides, which are known to have medical effects such as stress relief, vitality restoration, and improvement of depression. Furthermore, it has also been reported to have antibacterial, insecticidal, and deodorizing effects. To achieve such effects, methods for extracting essential oils from trees such as cypress are disclosed in the following patent documents 1 and 2. Patent document 1 discloses a method for extracting essential oils from cypress materials consisting of the trunk, leaves, or fruits of the cypress tree. Patent document 2 discloses a method for extracting essential oils from the rootstock of a cypress tree. Patent No. 6829510Patent No. 7025804 This is a cross-sectional view illustrating a method for determining the inscribed circle by measuring the cross-sectional shape of a log.This is a schematic side view illustrating an example of a method for obtaining the central part of a log, which has a cross-section of a circle of a predetermined diameter, from the center of the inscribed circle of the log. It shows how the central part of the log (peeled core) remains after obtaining veneers continuously using a rotary lathe.Another example of a method for obtaining the central part of a log, with a cross-section of a circle of a predetermined diameter, from the center of the inscribed circle of the log, is a schematic cross-sectional view showing how the central part of the log is cut out by cutting multiple planks from a log that has been cut with the inscribed circle as its cross-section using a sawmill.This flowchart shows the essential oil extraction method according to the present invention in order of steps, along with the plywood manufacturing process. The essential oil extraction method according to the present invention will be described in detail below with reference to Figures 2 to 4. (Inscribed circle setting process) Prepare logs of coniferous trees such as cypress and cedar, or broad-leaved trees such as eucalyptus and camphor. The type of tree is not limited as long as essential oil can be extracted from it. For example, the logs should have a diameter of 160 to 500 mm and a length of 2000 to 2150 mm. As shown in Figure 1, the cross-section 2 of the log 1 is not a perfect circle but has an irregular shape. Therefore, an inscribed circle 3 is set within this cross-section 2. This setting can be easily calculated by computer based on data obtained from measuring the cross-sectional shape of the log 1, and is performed, for example, as a preparatory step when cutting veneer from the log using a rotary lathe. (Log center preparation process) As described above, a central part 6 of the log is obtained, whose cross-section is all or part of the range of concentric circles 5 having a diameter of 30 to 60 mm with respect to the inscribed circle 3 of the log 1. An example of the central part of the log 6 is the core remaining after continuously obtaining veneers using a rotary lathe. Veneer cutting using a rotary lathe is well known. As shown in Figure 2, the cross-section of the log 1 is analyzed by computer to set the inscribed circle 3 and its center 4. Then, while rotating the inscribed circle 3 around its center 4, the cutting blade 8 is pressed against the surface of the log to cut. Initially, the portion 7 outside the inscribed circle 3 is gradually cut along the cutting line 10. By further cutting the log 1a, which has a nearly circular cross-section with the inscribed circle 3 as its cross-section, veneers 9 of a predetermined thickness are continuously produced in a manner similar to peeling. When veneer sheets 9 are continuously obtained using a rotary lathe in this manner, a long, cylindrical core remains at the end. From a yield standpoint, it is preferable to continue producing veneer sheets 9 until the diameter of the core becomes as small as possible. However, as the diameter of the log 1a decreases, the warping of the resulting veneer sheets 9 increases, reducing their value as veneer sheets 9. Therefore, generally, the diameter of the remaining core is about 50-60 mm (the length is the same as the log, 2000-2150 mm). Consequently, this core can be suitably used as the central part 6 of the log. Alternatively, as shown in Figure 3, the log 1 may be repeatedly cut along the cutting line 10 using a sawmill equipped with a band saw or circular saw, or a composite sawmill combining a band saw and a circular saw, to cut out multiple planks. The central portion of the log 6, having a cross-section within the range of concentric circles 5 with a diameter of 30 to 60 mm relative to the inscribed circle 3, can be used as the central part of the log. In this case, the cross-section of the central part of the log 6 is not necessarily limited to the square or rectan