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Method for reducing malonaldehyde value of grease for feedstuff

A malondialdehyde and oil technology, which is applied in animal feed, animal feed, fat oil/fat refining, etc., can solve the problems of reducing the malondialdehyde value of feed oil and the effect is not obvious, so as to reduce the malondialdehyde value and improve the Safety, effect of improving oxidative stability

Inactive Publication Date: 2012-11-21
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering that malondialdehyde is soluble in water, in the early stage of this study, distilled water or sulfuric acid and hydrochloric acid solutions without metal chelating effect were used to reduce the value of malondialdehyde in feed oil, but the effect was not obvious
There are no reports of other techniques for reducing the MDA value of feed oils

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Take 100g of mixed oil for feed, acid value 19.24mgKOH / g, peroxide value 4.18mmol / kg, malondialdehyde value 17.36mg / kg and join in the molecular distillation feed tank, desorb at 70°C and pressure 40Pa Gas for 60 minutes; carry out molecular distillation after degassing, free fatty acid and malondialdehyde are removed, the temperature of molecular distillation is 140°C, the pressure is 5.0Pa, the speed of scraping film is 250r / min, and 93.48g of mixed oil for heavy phase feed is obtained. The acid value is 1.80mgKOH / g, the peroxide value is 3.68mmol / kg, and the malondialdehyde value is 12.82mg / kg.

[0026] (2) with gained heavy phase feed mixed fat, wash 30min at 70 ℃ with 20wt% citric acid aqueous solution (the concentration of citric acid aqueous solution is 1.5wt%) of heavy phase fed mixed fat weight; After washing, leave standstill for 30 minutes Minute stratification, the upper strata obtains 92.65g of feed oil after pickling.

[0027] (3) Dry the mixed oil fo...

Embodiment 2

[0029] (1) Take 100g of feed mixed oil with an acid value of 19.24mgKOH / g, a peroxide value of 4.18mmol / kg, and a malondialdehyde value of 17.36mg / kg, and add it to the molecular distillation feed tank, and degas it at 90°C and a pressure of 100Pa 90min; carry out molecular distillation after degassing, free fatty acid and malondialdehyde are removed, the temperature of molecular distillation is 130°C, the pressure is 1.0Pa, the speed of scraping film is 200r / min, and 95.75g of mixed oil for heavy phase feed is obtained. The value is 4.31 mgKOH / g, the peroxide value is 4.01 mmol / kg, and the malondialdehyde value is 14.25 mg / kg.

[0030] (2) Wash 15min at 60° C. with water for 10 wt% of the phosphoric acid aqueous solution (the concentration of the phosphoric acid aqueous solution is 0.5 wt %) with the mixed fat for the heavy phase feed of the gained heavy phase feed; leave standstill for 60 minutes to stratify after washing , the upper layer got 95.11g of mixed fats and oils f...

Embodiment 3

[0033] (1) Take 100g of mixed oil for feed, acid value 19.24mgKOH / g, peroxide value 4.18mmol / kg, malondialdehyde value 17.36mg / kg and join it in the molecular distillation feed tank, and remove it at 80°C under a pressure of 75Pa. Gas for 30 minutes; carry out molecular distillation after degassing, free fatty acid and malondialdehyde are removed, the temperature of molecular distillation is 160°C, the pressure is 20.0Pa, the speed of scraping film is 350r / min, and 89.18g of mixed oil for heavy phase feed is obtained. The acid value is 0.76mgKOH / g, the peroxide value is 2.93mmol / kg, and the malondialdehyde value is 13.90mg / kg.

[0034] (2) With the mixed fat for gained heavy phase feed, wash 60min at 90 DEG C with 40wt% oxalic acid aqueous solution (concentration of oxalic acid aqueous solution is 3.0wt%) of mixed fat weight for heavy phase feed; After washing, under 3000r / min After centrifuging for 10 minutes, the layers were separated, and the upper layer obtained 88.02 g of...

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Abstract

The invention discloses a method for reducing the malonaldehyde value of grease for feedstuff, which comprises the following concrete steps: (1) adding the grease for feedstuff into a molecular distillation feeding tank, and carrying out molecular distillation after dewatering and degasification to obtain heavy-phase grease for feedstuff and light-phase free fatty acid; (2) carrying out still standing or centrifugal delamination on the obtained heavy-phase grease for feedstuff after acid solution washing, and obtaining grease for feedstuff after the acid washing; and (3) drying the grease forfeedstuff after the acid washing in vacuum to obtain the grease for feedstuff with the reduced malonaldehyde value. The invention adopts the molecular distillation technology, can reduce the malonaldehyde value of the grease for feedstuff on one hand, can simultaneously reduce the acid value thereof and the overoxidation value, and can improve the product oxidation stability. The acid water washing with the metal chelation effect is adopted, the malonaldehyde value of the grease for feedstuff is further reduced, and at the same time, the safety of the grease for feedstuff is improved through the heavy metal chelation.

Description

technical field [0001] The invention belongs to the technical field of oil control for feed, and in particular relates to a method for reducing the malondialdehyde value of oil for feed. Background technique [0002] Feed oil mainly includes feed mixed oil, feed vegetable oil and feed animal fat, which are essential energy and nutrients for poultry, livestock and aquatic fish and shrimp, and play an important role in animal feeding, growth and development. Because oil contains unsaturated carbon-carbon double bonds, it is prone to auto-oxidation in the air, and the primary oxidation product is hydroperoxide, which is manifested as an increase in the peroxide value of oil. In the early stage of auto-oxidation, the peroxide content of fats and oils increases continuously, and the peroxide value also increases continuously. As the oxidation progresses, the hydroperoxide begins to decompose into aldehydes, ketones and acids, which are volatile secondary oxidation products and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B3/00C11B3/12C11B3/04A23K1/16
Inventor 汪勇林志勇马顺唐书泽
Owner JINAN UNIVERSITY