Method for preparing biodiesel from tea oil cakes

A technology for biodiesel and tea oil cake, which is applied in the fields of biofuels, separation methods, fat oil/fat refining, etc., can solve the problems of reducing the efficiency and yield of biodiesel preparation, increasing the viscosity of the reaction system, reducing the catalytic effect, etc., so as to improve the utilization rate. Value, reduce usage, improve catalytic effect
CN113652307APending Publication Date: 2021-11-16HUNAN XINJINHAO TEA OIL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN XINJINHAO TEA OIL
Publication Date
2021-11-16

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Abstract

The invention discloses a method for preparing biodiesel from tea oil cakes. The method comprises the following steps: 1) extracting grease; 2) concentrating to obtain crude tea oil; 3) deacidifying by an extraction method, and recovering the organic solvent to obtain deacidified tea oil; 4) carrying out adsorption dehydration on the deacidified tea oil and an organic solvent by adopting a silica gel drying agent to obtain dried deacidified tea oil; 5) ester exchange reaction; 6) separating liquid to obtain a coarse product; 7) washing and drying to obtain a biodiesel crude product; and 8) carrying out molecular distillation to obtain the biodiesel. In the process of preparing the biodiesel from the tea oil cakes, the free fatty acid in the crude tea oil is extracted by adopting the organic solvent, and then the deacidified tea oil is subjected to the transesterification after being subjected to the adsorption dehydration, so that the increase of the content of the free fatty acid caused by the hydrolysis of the raw material grease is avoided, the saponification reaction of the catalyst and the free fatty acid is effectively prevented, the catalytic effect of the catalyst is improved, the preparation time of the biodiesel is shortened, and the preparation efficiency and the yield of the biodiesel are improved.
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Description

technical field

[0001] The invention relates to the technical field of biodiesel preparation, in particular to a method for preparing biodiesel from tea oil cake. Background technique

[0002] Camellia oil, also known as tea seed oil and camellia oil, is obtained from the seeds of Camellia oleifera, and is a unique woody oil in my country. Camellia oleifera in my country is rich in resources, and the area of ​​camellia oleifera forest accounts for more than 80% of the area of ​​woody edible oil plants. It is widely distributed in the hilly areas of 17 southern provinces, especially in Guangxi, Hunan, Jiangxi, and Yunnan.

[0003] Camellia oil contains a large amount of unsaturated fatty acids and has a low freezing point, which is very beneficial for conversion into biodiesel. The tea oil cake after pressing generally contains 7%-10% residues, and these residual oils are usually extracted by solvent extraction, and edible oils with solvent residues pose a safety hazard to t...

Claims

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