Extraction process of walnut oil

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By using urea and mercaptoethanol as pretreatment agents and optimizing soaking and extraction conditions, the problem of low oil yield in organic solvent extraction of walnut oil was solved, and efficient walnut oil extraction was achieved.

CN122326324APending Publication Date: 2026-07-03SHIJIAZHUANG WANJING NUTS CO LTD

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Patent Information

Application Number: CN202610558688.8
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2026-04-25
Publication Date: 2026-07-03

Application Information

Patent Timeline

25 Apr 2026

Application

CN202610558688.8

03 Jul 2026

Publication

CN122326324A

IPC: C11B1/10; C11B1/02; A23D9/02

CPC: C11B1/10; C11B1/02; A23D9/02

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Application Domain

Fatty-oils/fats production Edible oils/fats

Technology Topics

Vegetable oil Organosolv

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AI Technical Summary

Technical Problem

Existing organic solvent extraction methods for walnut oil have low oil yields.

Method used

Urea and/or mercaptoethanol were used as pretreatment agents to soak dried walnut kernel powder, followed by organic solvent extraction. The ratio of pretreatment agent to solvent and soaking conditions were optimized to improve the extraction efficiency of walnut oil.

Benefits of technology

It significantly improved the oil yield of walnut oil, reaching over 65.41%, which meets the GB/T 22327-2019 standard.

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Abstract

The invention relates to the technical field of vegetable fat production, and provides a walnut oil extraction process which comprises the following steps: S1, soaking dried walnut kernel powder in a pretreatment agent solution to obtain pretreated walnut kernel powder; s2, extracting walnut oil from the pretreated walnut kernel powder by adopting an organic solvent extraction method; a pretreatment agent in the pretreatment agent solution comprises urea and / or mercaptoethanol. According to the technical scheme, the problem that the oil yield of walnut oil extracted by an organic solvent extraction method in related technologies is not high is solved.

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