Refining process of biodiesel byproduct crude glycerol

A technology for biodiesel and crude glycerol, which is applied in the preparation of hydroxyl compounds, the preparation of organic compounds, the separation/purification of hydroxyl compounds, etc. Simple process and high purity effect

CN102952000AInactive Publication Date: 2013-03-06江苏洁美生物能源有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-03-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides a refining process of biodiesel byproduct crude glycerol, and relates to the technical field of chemical product production. The refining process includes diluting, desalting, removing impurity, distilling, decoloring and deflavouring. The high-quality refined glycerine is produced by employing the technologies of sodium oxalate complexing impurity removal and active carbon decoloring and deflavouring. The refining process is simple, high in glycerin yield, high in finished refined glycerin purity, and good in product quality.
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Description

technical field

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

[0002] In recent years, with the rapid increase of investment in biodiesel at home and abroad, while the production of biodiesel has increased significantly, a large amount of crude glycerol has also been produced as a by-product. As the main by-product glycerol in the biodiesel production process, about one ton of crude glycerol is produced for every ten tons of biodiesel produced. With the depletion of petroleum resources and the aggravation of environmental pollution, the choice of clean and renewable energy has become the focus of current energy research. Biodiesel is a high-quality alternative to petrochemical diesel. With its environmental friendliness and renewability, has received worldwide attention. One of the main problems facing the development of biodiesel at this...

Examples

Embodiment 1

[0026] The biodiesel by-product crude glycerol refining process of the present invention comprises the following method steps successively:

[0027] A. dilution

[0028] The obtained by-product crude glycerol produced by the production of biodiesel used in the refining of glycerol of the present invention is mixed together into a colloid due to entrainment of a small amount of biodiesel, methyl alcohol, unreacted catalyst sodium methylate and by-product soap compounds, so as to improve the crude glycerol and The separation effect of impurities can generally be diluted by adding methanol or ethanol, and the weight of the added methanol or ethanol diluent is 10% to 30% of the weight of crude glycerin. In this embodiment, methanol is used as a diluent, methanol with a weight of 25% of the weight of crude glycerin is added, and the mixture is fully stirred to dilute the crude glycerin. Because crude glycerol contains a small amount of methanol, using methanol as a diluent can av...