Extraction method of high quality lingxiang grass purified oil

Abstract

A process for extracting high-quality and high-purity Lingxiang herb oil includes such steps as extracting by supercritical CO2 fluid at 35 deg.C and 12 MPa for 1.5 hr, low-temp freeze dewaxing at -15- -20 deg.C, and high-speed centrifugal separation at 45 deg.C and 5 MPa. Its advantages are high output rate increased by 5 times high quality, no residual solvent, and special fragrance.

Description

(1) Technical field:

[0001] The invention relates to a method for extracting natural plant absolute oil, in particular to a method for extracting high-quality spirit vanilla absolute oil. (two) background technology:

[0002] Ling vanilla (Lysimachia foenum-graecum Hance) is a plant of the Primulaceae family, also known as Paicao, Linglingxiang, Peilan, Xiangxiang, etc. It is mainly produced in Jinxiu and Rongshui counties in Guangxi, Guangdong, Yunnan, and Sichuan. , Guizhou has cultivation. Ling vanilla has a very special aroma and is a rare and precious spice raw material. The traditional extraction methods of natural spices are mainly solvent method and steam distillation method. The solvent method will produce solvent residues and has no selectivity for the extract. The solvent recovery process has a high temperature, which is easy to destroy the aroma components, and may also have a certain impact on the environment. Pollution, long process and time-consuming. The s...

Examples

Embodiment 1

[0022] Example 1: Feed amount 10kg, extraction pressure 12MPa, temperature 50°C, time 1h, CO 2 The flow rate is 150L / h; the separation pressure is 5MPa, the separation temperature is 40°C, the freezing temperature is -20°C in the process of freezing and centrifuging to remove wax, and the rotation speed is 4000 rpm, 118g of delica absolute, and the yield of absolute oil is 1.18%. Content 93.5%. Ling vanilla absolute oil has a good aroma, good fluidity, and is yellow and transparent.

Embodiment 2

[0023] Example 2: Feeding amount is 10kg, extraction pressure is 14MPa, extraction temperature is 35°C, extraction time is 1.5h, flow rate is 180L / h, separation pressure is 5.5MPa, separation temperature is 55°C, freezing temperature is -18°C during freezing and centrifugal dewaxing, and the rotation speed is 4500 revs / min, and finally 121g of absolute vanilla absolute, with an absolute yield of 1.21%, and an absolute content of 92.5%. Spirit vanilla absolute oil color is darker than example 1.

Embodiment 3

[0024] Example 3: Feeding amount is 10kg, extraction pressure is 15MPa, extraction temperature is 35°C, extraction time is 1.5h, flow rate is 170L / h, separation pressure is 4.5MPa, separation temperature is 45°C, freezing temperature is -18°C during freezing and centrifugal dewaxing, and the rotation speed is It is 4500 rev / mins, and finally the pure vanilla absolute oil is 125g, and the absolute oil yield is 1.25%, and the absolute oil content is 91.5%. Spirit vanilla absolute oil color is darker than example 1.

(1) Technical field:

[0001] The invention relates to a method for extracting natural plant absolute oil, in particular to a method for extracting high-quality spirit vanilla absolute oil. (two) background technology:

[0002] Ling vanilla (Lysimachia foenum-graecum Hance) is a plant of the Primulaceae family, also known as Paicao, Linglingxiang, Peilan, Xiangxiang, etc. It is mainly produced in Jinxiu and Rongshui counties in Guangxi, Guangdong, Yunnan, and Sichuan. , Guizhou has cultivation. Ling vanilla has a very special aroma and is a rare and precious spice raw material. The traditional extraction methods of natural spices are mainly solvent method and steam distillation method. The solvent method will produce solvent residues and has no selectivity for the extract. The solvent recovery process has a high temperature, which is easy to destroy the aroma components, and may also have a certain impact on the environment. Pollution, long process and time-consuming. The s...

Examples

Embodiment 1

[0022] Example 1: Feed amount 10kg, extraction pressure 12MPa, temperature 50°C, time 1h, CO 2 The flow rate is 150L / h; the separation pressure is 5MPa, the separation temperature is 40°C, the freezing temperature is -20°C in the process of freezing and centrifuging to remove wax, and the rotation speed is 4000 rpm, 118g of delica absolute, and the yield of absolute oil is 1.18%. Content 93.5%. Ling vanilla absolute oil has a good aroma, good fluidity, and is yellow and transparent.

Embodiment 2

[0023] Example 2: Feeding amount is 10kg, extraction pressure is 14MPa, extraction temperature is 35°C, extraction time is 1.5h, flow rate is 180L / h, separation pressure is 5.5MPa, separation temperature is 55°C, freezing temperature is -18°C during freezing and centrifugal dewaxing, and the rotation speed is 4500 revs / min, and finally 121g of absolute vanilla absolute, with an absolute yield of 1.21%, and an absolute content of 92.5%. Spirit vanilla absolute oil color is darker than example 1.

Embodiment 3

[0024] Example 3: Feeding amount is 10kg, extraction pressure is 15MPa, extraction temperature is 35°C, extraction time is 1.5h, flow rate is 170L / h, separation pressure is 4.5MPa, separation temperature is 45°C, freezing temperature is -18°C during freezing and centrifugal dewaxing, and the rotation speed is It is 4500 rev / mins, and finally the pure vanilla absolute oil is 125g, and the absolute oil yield is 1.25%, and the absolute oil content is 91.5%. Spirit vanilla absolute oil color is darker than example 1.

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