Method for refining biodiesel by-product crude glycerine

A technology for biodiesel and crude glycerin, applied in the chemical industry, can solve the problems of high energy consumption and high equipment requirements, and achieve the effects of low equipment requirements, increased value and simple methods
CN103664523AInactive Publication Date: 2014-03-26QINGDAO JIENENG ENERGY SAVING ENVIRONMENTAL PROTECTION TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QINGDAO JIENENG ENERGY SAVING ENVIRONMENTAL PROTECTION TECH
Publication Date
2014-03-26
Estimated Expiration
Not applicable · inactive patent
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Abstract

The invention relates to a method for refining biodiesel by-product crude glycerine. The method comprises the following steps: saponifying, namely weighing a certain amount of biodiesel by-product crude glycerine, and carrying out saponification according to the molar ratio of potassium hydroxide methanol solution to esters being 1-2; 2, acidizing, namely adding 30g of saponified crude glycerine to a 500mL of three-necked flask, adding a polar reagent methanol as an extracting agent according to the volume ratio of 4:1 to 1:4, adding a dilute acid solution to adjust the pH of the solution to be 1-5, agitating, standing and layering and collecting subnatant; 3, adsorbing, namely respectively adding 50-80mg / L of activated carbon to the subnatant, heating at 70 DEG C to remove methanol, finally pouring the solution into a separating funnel, cooling and layering: 4, determining the content of glycerine. The method has the beneficial effects that the biodiesel by-product crude glycerine is refined, so that not only is the value of crude glycerine improved, but also raw materials are supplied to the fields such as pharmacy, food and the like. The method disclosed by the invention is simple, mild in reaction condition, low in requirement on equipment, and strong in practicability.
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Description

technical field

[0001] The invention relates to the field of chemical industry, in particular to a method for refining crude glycerol, a by-product of biodiesel. Background technique

[0002] Pure glycerin (glycerol) is a colorless, sweet-smelling viscous liquid that is widely used in pharmaceutical, food, cosmetic, cellophane, insulating materials and chemical industries. A large amount of by-product crude glycerin is produced in the process of producing biodiesel from animal and vegetable oils. Crude glycerin can be purified by removing the salt content in glycerin through macroporous strong acid ion resin. and use membrane filtration to remove impurities. However, these methods require high equipment and consume a lot of energy. Contents of the invention

[0003] According to above-mentioned deficiencies, the object of the present invention is to provide a kind of method for the crude glycerol refining of biodiesel by-product.

[0004] The technical scheme of the pre...

Claims

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