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A kind of method for reducing plasticizer content in vegetable oil

A vegetable oil and plasticizer technology, applied in the direction of fat oil/fat refining, fat production, etc., can solve problems such as reducing the content of vegetable oil plasticizers

Active Publication Date: 2021-08-06
SANMARK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem of how to reduce the content of plasticizer in vegetable oil by combining stripping method and molecular distillation method, supplemented by ultrasonic treatment technology

Method used

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  • A kind of method for reducing plasticizer content in vegetable oil
  • A kind of method for reducing plasticizer content in vegetable oil
  • A kind of method for reducing plasticizer content in vegetable oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for reducing plasticizer content in walnut crude oil in which plasticizer exceeds the standard, said method may further comprise the steps:

[0025] Stripping steps:

[0026] Add ethanol with a volume fraction of 75% and n-hexane at a volume ratio of 3:1 to the walnut crude oil with excess plasticizer, and the volume ratio of walnut crude oil with excess plasticizer to ethanol-n-hexane mixture is 1:3, Then add neutral alumina, the weight ratio of walnut crude oil with excessive plasticizer to neutral alumina is 1:1, ultrasonic at 60°C for 9 minutes, ultrasonic power is 280W, and filter;

[0027] Separation steps:

[0028] The liquid containing walnut crude oil obtained by filtering in the stripping step is centrifuged at 3000r / min for 5min, and the walnut crude oil in the lower layer is separated from the ethanol-n-hexane mixture containing plasticizer in the upper layer after layering;

[0029] Molecular distillation steps:

[0030] The molecular distillati...

Embodiment 2

[0035] A method for reducing plasticizer content in machine-pressed grapeseed oil with excess plasticizer, said method comprising the steps of:

[0036] Stripping steps:

[0037] Add ethanol with a volume fraction of 80% and n-hexane at a volume ratio of 2:1 to machine-pressed grapeseed oil with excess plasticizer, and the volume ratio of machine-pressed grapeseed oil with excess plasticizer to ethanol-n-hexane mixture is 1:3, then add neutral alumina, the weight ratio of machine-pressed grape seed oil with excessive plasticizer to neutral alumina is 2:1, ultrasonic at 65°C for 5 minutes, ultrasonic power is 300W, and filter;

[0038] Separation steps:

[0039] The liquid containing the organically squeezed grape seed oil filtered in the stripping step is centrifuged at 3000r / min for 5min, and the machine-pressed grapeseed oil in the lower layer is separated from the ethanol-n-hexane mixture containing the plasticizer in the upper layer after layering;

[0040] Molecular dis...

Embodiment 3

[0046] A method for reducing plasticizer content in refined hemp oil with plasticizer exceeding the standard, said method comprising the steps of:

[0047] Stripping steps:

[0048] Add ethanol with a volume fraction of 75% and n-hexane in a volume ratio of 2:1 to the refined hemp oil with a plasticizer exceeding the standard, and the volume ratio of the refined hemp oil with a plasticizer exceeding the standard to the ethanol-n-hexane mixture is 1:3, Then add neutral alumina, the weight ratio of refined hemp oil with plasticizer exceeding the standard to neutral alumina is 2:1, ultrasonic at 65°C for 5 minutes, ultrasonic power is 240W, and filter;

[0049] Separation steps:

[0050] The liquid containing refined hemp oil obtained by filtering in the stripping step is centrifuged at 3000r / min for 5min, and the refined hemp oil in the lower layer is separated from the ethanol-n-hexane mixture containing plasticizer in the upper layer after layering;

[0051] Molecular distil...

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Abstract

The invention relates to a method for reducing the content of plasticizer in vegetable oil. The method of the present invention comprises the following steps: stripping step: adding ethanol and n-hexane to the vegetable oil whose plasticizer exceeds the standard, then adding neutral alumina, ultrasonication, and filtering; separation step: filtering the obtained Liquid centrifugation and separation; molecular distillation step: molecular distillation of the vegetable oil-containing liquid separated in the separation step to obtain qualified vegetable oil. The invention solves the problem of how to reduce the plasticizer content in the vegetable oil by combining the stripping method with the molecular distillation method and supplemented by ultrasonic treatment technology.

Description

technical field [0001] The invention relates to a method for reducing the content of plasticizer in vegetable oil. Background technique [0002] Plasticizers, also known as plasticizers or plasticizers, are additives that increase the flexibility of materials or liquefy materials. There are over a hundred types of plasticizers, but the most commonly used compounds are a group of compounds called phthalic acid esters (PAEs). The production of PAEs is large, and the global annual output is 5 million tons, and it is increasing year by year. Since PAEs do not form a stable chemical bond with the plastic polymer matrix, they are easy to migrate from the plastic to the external environment, causing air, water, soil, and food pollution, and are transmitted to humans through environmental media and food chains, bringing potential hazards to human health. . [0003] Studies have shown that PAEs can have a variety of harmful effects on animals and humans, have estrogen-like and ant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B3/00C11B3/12
CPCC11B3/001C11B3/006C11B3/12
Inventor 王缈李燕杰孙婷婷甄成
Owner SANMARK CORP