Refining method for fourth-grade rapeseed oil

A technology of rapeseed oil and rapeseed oil, applied in the direction of fat oil/fat refining, fat production, etc., can solve the problems of large investment, high cost, large oil refining loss, etc., and achieve the effect of increasing environmental pollution and simple and feasible processing methods

Active Publication Date: 2015-11-25
厦门银祥油脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the oil refining loss is large, there is a loss of 1.2-1.5%, the investme

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1:

[0026] Add 0.06% 40% citric acid to the pre-pressed rapeseed oil with phosphorus content of 320ppm (non-hydratable phospholipid 130ppm), stir and mix evenly at 65°C to 75°C, and acidify for 1.0 hour. Then add 0.13% phosphoric acid with a concentration of 85%, stir and mix evenly at 80°C to 85°C, and the acidification time is 15 minutes. Then add 5% demineralized water at a temperature of 85°C, stir and mix evenly at 85°C, and the hydration time is 15 minutes. The oil is pumped by the transfer pump into a self-cleaning centrifuge with a back pressure of 3-3.2 bar and a centripetal pump opening of 90 to continuously separate and remove lipids such as phospholipids in the rapeseed oil. After centrifugal degumming, the degummed rapeseed oil was obtained by adding 0.04% hydrogen peroxide with a concentration of 30%, stirring and mixing evenly at 80° C., and the oxidative decolorization time was 1.5 minutes. The rapeseed oil after oxidative decolorization is pu...

Example Embodiment

[0027] Example 2:

[0028] Add 0.04% citric acid of 40% concentration to leaching rapeseed oil with phosphorus content of 1200ppm (non-hydratable phospholipid 80ppm), stir and mix evenly at 65°C to 75°C, and acidify for 0.5 hours. Then add 0.16% phosphoric acid with a concentration of 85%, stir and mix evenly at 80°C to 85°C, and the acidification time is 20 minutes. Then add 7% demineralized water with a temperature of 85°C, stir and mix evenly under the conditions of 80°C to 85°C, and the hydration time is 20 minutes. The oil is pumped by the transfer pump into a self-cleaning centrifuge with a back pressure of 3-3.2 bar and a centripetal pump opening of 90 to continuously separate and remove lipids such as phospholipids in the rapeseed oil. Add 0.06% hydrogen peroxide with a concentration of 30% to the degummed rapeseed oil obtained after centrifugal degumming, stir and mix evenly at 80° C., and the oxidative decolorization time is 2.0 minutes. The rapeseed oil after oxid...

Example Embodiment

[0029] Example 3:

[0030]Add 0.05% 40% citric acid to the mixed rapeseed oil with a phosphorus content of 540 ppm (120 ppm of non-hydratable phospholipids), stir and mix evenly at 65°C to 75°C, and acidify for 1.0 hour. Then add 0.16% phosphoric acid with a concentration of 85%, stir and mix evenly at 80°C to 85°C, and the acidification time is 20 minutes. Then add 7% demineralized water with a temperature of 85°C, stir and mix evenly under the conditions of 80°C to 85°C, and the hydration time is 20 minutes. The rapeseed oil obtained by hydration is pumped by a transfer pump into a self-cleaning centrifuge with a back pressure of 3-3.2 bar and a centripetal pump opening of 90 to continuously separate and remove lipids such as phospholipids in the rapeseed oil. Add 0.06% hydrogen peroxide with a concentration of 30% to the degummed rapeseed oil obtained after centrifugal degumming, stir and mix evenly at 80° C., and the oxidative decolorization time is 2.0 minutes. The rape...

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Abstract

The invention discloses a refining method for fourth-grade rapeseed oil. The refining method comprises the following steps: (1) carrying out pre-acidification; (2) carrying out post-acidification; (3) carrying out hydration; (5) carrying out centrifugal degumming; (5) carrying out oxidative decolorization; and (6) carrying out vacuum dehydration and desolvation. According to the method disclosed by the invention, two acids are separately used for two-time acidifying hydrated phospholipid and non-hydrated phospholipid in crude oil, so that the phospholipid content in the fourth-grade rapeseed oil is reduced to meet the qualified requirement of a heating test, and therefore, the problem that four-grade rapeseed oil produced from imported rapeseed oil cannot meet the quality standards in a heating test is solved.

Description

technical field [0001] The invention belongs to the technical field of edible oil refining, and in particular relates to a refining method of four-grade rapeseed oil. Background technique [0002] When imported rapeseeds are processed and refined into grade 4 rapeseed oil, there is a general problem of unqualified heating test in the quality inspection of grade 4 rapeseed oil, which is specifically manifested in the presence of precipitates and the increase in blue value after heating of grade 4 rapeseed oil Exceeded the standard. [0003] There are two main ways to solve this problem in China. One is to increase the bleaching clay decolorization section, use activated clay to absorb chlorophyll and lipids in oil, and reduce the blue value in oil. The fourth-grade oil produced by this method can basically meet the "280°C heating test blue value increase index" qualified, the disadvantage is that the oil has a loss of 0.3-1%, and the oil has a white clay smell, which is not...

Claims

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Application Information

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IPC IPC(8): C11B3/00C11B3/04C11B3/08
Inventor 孙勤薛武军苏永裕杨俊杰路同辉李奇杨耿彬刘畅刘升王帅帅陈琼华
Owner 厦门银祥油脂有限公司
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