A process for treating glycerin aqueous solution produced by lipid hydrolysis
A glycerin aqueous solution and treatment process technology, which is applied in the preparation of organic compounds, separation/purification of hydroxyl compounds, preparation of hydroxyl compounds, etc., can solve problems such as difficulty in separation and affect the quality of glycerin products, achieve less impurities, and improve energy utilization. , the effect of reducing waste
Inactive Publication Date: 2019-11-12
SHANGHAI SOAP GRP RUGAO
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[0002] The glycerin aqueous solution (commonly known as glycerin aqueous solution) produced by oil hydrolysis contains a small amount of oil and fatty acids, which will be difficult to separate in the subsequent distillation and concentration of glycerin aqueous solution, which will affect the quality of the final glycerin product.
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[0014] A kind of glycerol aqueous solution treatment process that is used for oil hydrolysis to produce, comprises the steps:
[0015] (1) Firstly, the aqueous glycerin solution is passed through static stratification to remove the upper layer of grease and fatty acid;
[0016] (2) Then inject the aqueous glycerin solution into the pretreatment pot through the pump, control the pretreatment temperature at 65-75°C, add 1-2‰ lime, adjust the pH value of the solution to 8-11, and remove it by pressing the aqueous glycerin solution once After removing the insolubles, separate the aqueous glycerin solution from the fatty acids and esters therein;
[0017] (3) Then put the glycerin aqueous solution after the primary pressure filtration through the plate and frame filter press to filter impurities and put it into the secondary pretreatment pot, add 1-1.5‰ sodium carbonate to remove Ca2+ and saponification residue in the primary refined glycerin aqueous solution Fatty acid, the pH va...
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The invention discloses a process for treating a glycerin aqueous solution produced by lipid hydrolysis. The process includes firstly removing upper lipids and fatty acids by standing and layering theglycerin aqueous solution; then pumping the glycerin aqueous solution through a pump into a pretreatment pot, with the pretreatment temperature being controlled to be 65-75 DEG C, adding lime to adjusting the pH value of the solution to 8-11, and subjecting the glycerin aqueous solution to primary pressure filtration to remove insoluble matters so that the glycerin aqueous solution is separated from fatty acids and esters in the solution; filtering the obtained glycerin aqueous solution after primary pressure filtration with a frame type filter to remove impurities, then adding the solution to a secondary pretreatment pot, adding sodium carbonate, removing Ca<2+> in the glycerin aqueous solution after primary purification and fatty acids residual after saponification, then adding sodium carbonate to adjusting the pH value to 10-13, and performing secondary filtration with the frame type filter to remove impurities, and then distillation and concentration can be performed to obtain high-purity glycerin. The glycerin aqueous solution treated by the process is low in impurity content and high in quality, leftovers generated in distillation and concentration can be reduced, and a glycerin product is improved in quality.
Description
technical field [0001] The invention relates to the technical field of fine chemicals, in particular to an aqueous glycerin treatment process used for oil hydrolysis. Background technique [0002] The glycerin aqueous solution (commonly known as glycerin aqueous solution) produced by oil hydrolysis contains a small amount of oil and fatty acids. If it is not cleaned, it will be difficult to separate in the subsequent distillation and concentration of glycerin aqueous solution, which will affect the quality of the final glycerin product. Contents of the invention [0003] The object of the present invention is to provide an aqueous glycerol treatment process for oil hydrolysis to address the defects and deficiencies of the prior art. [0004] In order to achieve the above object, the technical solution adopted in the present invention is: a kind of glycerin aqueous solution treatment process that is used for the hydrolysis of oil and fat, and its innovative point is, compri...
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IPC IPC(8): C07C31/22C07C29/74C07C29/76C07C29/88
CPCC07C29/74C07C29/76C07C29/88C07C31/225
Inventor 张智伟李义军李春炀
Owner SHANGHAI SOAP GRP RUGAO