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Method for leaching cold press peeled vegetable seed cake oil by using mixed solvent

A technology of mixed solvent and rapeseed cake, which is applied in the production of fat oil/fat and fat production, can solve the problems of increasing the difficulty of leaching oil separation treatment, low leaching efficiency, etc., so as to improve production efficiency, reduce residual oil in cakes, Energy saving effect

Inactive Publication Date: 2008-12-17
中粮工科(西安)国际工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After treatment with isopropanol, a large amount of these substances and oils are leached out at the same time, and become a mixed oil that needs to be separated. Since the sugar in the mixed oil is difficult to handle, this increases the difficulty of separating the leached oil in actual production.
Less efficient leaching due to the polarity of isopropanol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The crushed cold-pressed dehulled rapeseed cake 50g and 150ml of isopropanol and cyclohexane mixed solvent (the volume ratio of isopropanol to cyclohexane is 3: 1) are mixed in a flask, and evaporated under the condition of 62 ℃ Once leached in the device for 60 minutes, the residual oil rate in the leached meal was 0.75%, and the impurity content in the leached oil was 0.74%.

Embodiment 2

[0034] The crushed cold-pressed dehulled rapeseed cake 50g is mixed with 150ml of isopropanol and hexanaphthene mixed solvent (the volume ratio of isopropanol and hexanaphthene is 2: 1) and mixed in a flask, and evaporated under the condition of 62 ℃ Once leached in the device for 60 minutes, the residual oil rate in the leached meal was 0.83%, and the impurity content in the leached oil was 0.60%.

Embodiment 3

[0036] The crushed cold-pressed dehulled rapeseed cake 50g is mixed with 150ml of isopropanol and hexanaphthene mixed solvent (the volume ratio of isopropanol and hexanaphthene is 5: 1) and mixed in a flask, and evaporated under the condition of 62 ℃ Once leached in the device for 60 minutes, the residual oil rate in the leached meal was 0.20%, and the impurity content in the leached oil was 1.58%.

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Abstract

The invention provides a method for the extraction of cold-pressing de-skinned rapeseed meal oil by adopting a component solvent, which is characterized in that: after the cold-pressing de-skinned rapeseed meal is ground by a grinder, a certain amount is taken, put in a flask and mixed with the mixed liquor of isopropyl alcohol and cyclohexane of certain volume; at the temperature of 62 DEG C, continuous digestion is carried out in a rotatory evaporator, during digestion, the solid-liquid ratio is 1.5:1 to 5:1, the volume ratio of isopropyl alcohol and cyclohexane is 0.5:1 to 5:1 and the digestion lasts 20min to 100min and is carried out for 1 to 2 times. The impurity in the obtained oil drops by 2.6 percent compared with isopropyl alcohol and residual oil rate drops by 0.56 percent compared with n-hexane and by 0.17 percent compared with isopropyl alcohol, which explains that the application of mixing polar solvent and non-polar solvent can well restrain polar substances in meal from extraction, thereby reducing working load in practical production and being capable of effectively improving the output of extracted oil.

Description

technical field [0001] The invention relates to the selection of a novel solvent in the oil extraction industry and a method for extracting cold-pressed dehulled rapeseed cake oil using the solvent. Background technique [0002] In the modern oil industry, conventional technologies such as pretreatment pressing, No. 6 solvent oil (or n-hexane) extraction, and continuous refining are very mature. However, with the construction of a harmonious society, people have higher requirements for pure natural, pollution-free green food, pay more attention to the environment in which they live, and constantly put forward the safety and environmental friendliness of oil processing. question. In recent years, studies have found that n-hexane vapor can damage the central nervous system and motor nerve cells. The United States passed the Clean Air Act in 1990 to officially list n-hexane as a harmful substance in air pollution. At present, the United States has compared 65 alternative sol...

Claims

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Application Information

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IPC IPC(8): C11B1/10
Inventor 曹万新杨帆魏冰曾维丽石珊珊杜宣利吴生平朱正友
Owner 中粮工科(西安)国际工程有限公司
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