Preparation process of pinus yunnanensis pine nut oil

Abstract

The invention provides a preparation process of pinus yunnanensis pine nut oil and belongs to the field of a vegetable oil extraction process. The process takes pinus yunnanensis pine nuts as raw materials; after the pinus yunnanensis pine nuts are subjected to a humidity test and meet the requirements, empty shells and impurities are removed through winnowing and then are crushed through a wood crusher; then the pine nut oil is extracted through adopting supercritical carbon dioxide extracting equipment and then is subjected to sampling inspection and chemical examination; if physical and chemical indexes exceed the standards, a sodium silicate (AR) solvent is used for removing acid; if the physical and chemical indexes are qualified, the pine nut oil is purified by adopting membrane separation equipment; and residual colloids and impurities are removed to finally obtain a pine nut concentrated oil finished product. Compared with the prior art, the comprehensive extraction rate of the pinus yunnanensis pine nut oil prepared by the process can reach 20% or more; and the refining difficulty is greatly reduced, the loss is greatly reduced, and an active component gamma-linolenic acid in the oil is extremely kept.

Description

technical field [0001] The invention relates to the field of vegetable oil extraction technology, in particular to a preparation technology of Yunnan pine pine nut oil. Background technique [0002] The Chinese patent with the application number ZL01108577.0 provides a Yunnan pine nut extract and its preparation method and application. The preparation method of the extract adopts a physical pressing method. After the pine nut raw material is screened, it is electrically heated to After the required high temperature, squeeze the raw material to extract the crude oil, then use the centrifuge equipment to separate most of the impurities and colloids in the crude oil and remove them, and then use the refiner to refine it to deacidify, dehydrate and purify it, and finally Pine nut essential oil is obtained by filtering out fine impurities with traditional natural filtration equipment. [0003] The shortcoming of adopting this physical pressing method to prepare Yunnan pine pine ...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of using this physical pressing method to prepare Yunnan pine pine nut oil are: one, the extraction rate is not high

2. The production process is cumbersome

Three, the quality is difficult to control

Because the active ingredient γ-linolenic acid in the pine nut oil has special requirements on temperature, humidity, light source, etc., it is very easy to transform, acidify and oxidize, while the traditional physical pressing method is carried out under light in all links of production, pressing and refining The link needs to be repeatedly heated to 70-120°C, and the physical degumming and separation of impurities with a centrifuge, solvent deacidification and other processes cannot avoid the transformation and continuous loss of the active ingredient γ-linolenic acid in pine nut oil, so this It is more difficult to control the quality of this process, and the human factors and losses are larger