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Method for leaching vegetable fat with dimethly carbonate

A technology of dimethyl carbonate and vegetable oil, applied in the direction of oil/fat production, fat production, etc., can solve the problems of solvent residue, nervous system toxicity, etc., and achieve the effect of reducing the risk

Active Publication Date: 2013-06-19
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, in recent years, food safety has become a hot spot of concern all over the world. Consumers in the United States, Europe, Japan and other countries have increasingly stringent requirements for the residual amount of solvents in edible vegetable oils and fats. Currently, industrial hexane with n-hexane as the main component is used Solvent oil leached with No. 6 solvent oil will more or less have solvent residues, and n-hexane is absorbed through the respiratory tract or gastrointestinal tract, which has obvious toxic effects on the nervous system of the human body

Method used

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  • Method for leaching vegetable fat with dimethly carbonate

Examples

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Effect test

Embodiment 1

[0028]Take 500 parts by weight of commercially available soybeans, sieve out impurities such as sand, dry them until the water content is within 13-15% by weight, pulverize them on a pulverizer, pass through a 20-mesh sieve, put them into an extraction tank, and add 1800 parts by weight of carbonic acid Dimethyl ester (DMC) solvent, leaching at 70°C for 60 minutes, standing for 10 minutes, filtering and separating the mixed oil and seed meal, distilling the mixed oil under reduced pressure under the protection of nitrogen, recovering the solvent and collecting soybean oil; adding the seed meal to Dimethyl carbonate (DMC) 1800 weight parts, repeat above-mentioned leaching operation 2 times, once leaching oil extraction rate is 75.2%, after three leaching oil extraction rates are altogether 96.8%, gained leaching soybean oil is light yellow clear solution ,odorless.

Embodiment 2

[0030] Take commercially available fresh camellia oleifera fruit, remove the shell and separate the tea seeds, dry them naturally in the sun, screen out impurities such as sand, take 500 parts by weight to remove the tea seed shells, and dry the tea seed kernels until the moisture content is 12-2. Within 14% weight ratio, pulverize on a pulverizer, pass through a 40-mesh sieve, add 1000 parts by weight of dimethyl carbonate (DMC) solvent, extract at 65°C for 90 minutes, leave it for 10 minutes, filter and separate the mixed oil and seed meal, and The mixed oil was distilled under reduced pressure under the protection of nitrogen, the solvent was recovered and the tea seed oil was collected; 1000 parts by weight of dimethyl carbonate (DMC) was added to the seed meal, and the above extraction operation was repeated twice, and the oil extraction rate of one extraction was 86.3 %, the oil extraction rate after three extractions is 97.6% in total, and the obtained extracted tea seed...

Embodiment 3

[0032] Commercially available dry peanuts are sieved to remove impurities such as sand, shelled, and 500 parts by weight are taken, dried until the water content is within the weight ratio of 13-15%, crushed on a grinder, passed through a 40-mesh sieve, put into an extraction tank, and added 1500 parts by weight of dimethyl carbonate (DMC) solvent, leaching at 75°C for 80min, after standing for 10min, filtering and separating the mixed oil and seed meal, the mixed oil is distilled under reduced pressure under the protection of nitrogen, reclaiming the solvent and collecting peanut oil; Add 1500 parts by weight of dimethyl carbonate (DMC) to the seed meal again, repeat the above-mentioned leaching operation 2 times, and the oil extraction rate of one extraction is 73.8%, and the oil extraction rate after three extractions is 95.6% altogether, and the gained extraction peanut oil is Light yellow clear solution, no peculiar smell.

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Abstract

The invention provides a method for leaching vegetable fat with dimethly carbonate (DMC), comprising the following steps of: screening, drying, crushing and feeding oil plant seeds into an extracting tank; adding solvent of dimethly carbonate (DMC) and leaching; subjecting the leaching mixture to the reduced pressure filtration to separate out mixed oil and seed meal; subjecting the mixed oil to the reduced pressure distillation under the protection of the nitrogen gas and recovering the solvent and simultaneously obtaining fat with clear color and no off flavor; and repeatedly leaching the recovered seed meal and the solvent for 1-4 times until the oil is not generated any longer after the reduced pressure distillation. According to the process for leaching vegetable fat, the green solvent of dimethly carbonate (DMC) with high safety is taken as the solvent, so that the leached vegetable fat more meets the requirement of food safety, has no harm to operators exposed in the productionenvironment and no pollution to the environment, thus the danger in the production is reduced.

Description

technical field [0001] The invention belongs to the technical field of vegetable oil extraction, and relates to a method for extracting vegetable oil by using dimethyl carbonate (DMC). Background technique [0002] Dimethyl carbonate (Dimethyl carbonate, abbreviated DMC) is a colorless, transparent liquid with an aromatic odor. It has a wide range of sources. It can be synthesized not only by petrochemical and coal chemical routes, but also by renewable resources. In addition, it can be synthesized by greenhouse Gas CO 2 To synthesize dimethyl carbonate (DMC), which not only solves environmental problems, but also utilizes cheap carbon sources. Dimethyl carbonate (DMC) has the characteristics of non-toxic, non-corrosive, high oxygen content, narrow range of melting point and boiling point, high surface tension, low viscosity, small dielectric constant and good compatibility. Its molecular structure contains methyl, There are three functional groups, carbonyl and carboxyl, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B1/10C11B1/00
Inventor 陈小鹏王琳琳陈毓静韦小杰梁杰珍
Owner GUANGXI UNIV
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