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Glycerin distillation residue treatment method

A distillation residue and treatment method technology, which is applied in the field of chemical engineering, can solve the problems of performance degradation and affecting the durability of cement, etc., and achieve the effects of short process, no discharge of three wastes, and easy industrial application

Active Publication Date: 2014-01-22
JIANGSU JUWEI NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art and research, most of the untreated glycerin distillation residue is directly compounded with other chemical components, such as triethanolamine, molasses, sodium lignosulfonate, etc., to prepare cement chemical additives, and chlorine salts, fatty acids and Other salts will be brought into the cement chemical additives to reduce its performance and affect the durability of cement

Method used

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  • Glycerin distillation residue treatment method

Examples

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Effect test

Embodiment 1

[0034] The glycerin distillation residue used in Example 1 was taken from the waste dump of chemical company A that produces refined glycerin, and is a dark brown semi-solid with a pH of 13. Take 100 grams of glycerin distillation residue, add 100 grams of absolute ethanol as extractant, and filter with filter paper to remove 48 grams of light yellow solid inorganic salt after stirring; distill the filtrate to remove extractant (extractant can be reused) to obtain viscous brown 50.2 grams of liquid; add 50 grams of water and stir, then heat to 80°C, add 2.4 grams of 99% (mass percent concentration) glacial acetic acid to adjust the pH to 3, and after standing still, skim to remove 4.5 grams of floating fatty acids; add 85% ( mass percent concentration) of diethanol isopropanolamine (DEIPA) 8 grams, adjust the pH to 9, to obtain 106.1 grams of dark brown mixed liquid, the water content was determined to be 48%.

Embodiment 2

[0036] The glycerol distillation residue used in Example 2 was taken from the waste dump of chemical company B producing refined glycerin, and was a light brown viscous liquid with a pH of 12. Take 100 grams of glycerin distillation residue, add 50 grams of absolute ethanol as an extractant, and filter with filter paper to remove 5 grams of light yellow solid inorganic salt; distill the filtrate to remove the extractant (the extractant can be reused) to obtain a viscous brown liquid 94.6 grams; add 20 grams of water and stir and heat to 60°C, add 12.8 grams of hydrochloric acid solution (20% by mass) to adjust the pH to 3, and skim to remove 2.4 grams of floating fatty acids after standing; add 99% (mass percent concentration) concentration) of triethanolamine (TEA) 10 grams, adjust the pH to 10, to obtain 135 grams of light brown mixed liquid, the water content is 22% after determination.

Embodiment 3

[0038] The glycerin distillation residue used in Example 3 was taken from the waste dump of chemical company C that produces refined glycerin, and it is a tan viscous semi-solid with a pH of 13. Take 100 grams of glycerin distillation residue, add 200 grams of absolute ethanol as an extractant, and filter with a filter cloth to remove 35 grams of light yellow solid inorganic salt after stirring; distill the filtrate to remove the extractant (the extractant can be reused) to obtain a viscous brown 64.2 grams of brown liquid; add 30 grams of water and stir, then heat to 95°C, add 1 gram of concentrated sulfuric acid (mass percentage concentration 98%) to adjust the pH to 5, after standing still, skim to remove 1.2 grams of floating fatty acids; add 20% ( mass percent concentration) of NaOH solution 5 grams, adjust the pH to 8, to obtain 99 grams of tan mixed liquid, the water content was determined to be 35%.

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Abstract

The invention discloses a glycerin distillation residue treatment method. The glycerin distillation residue treatment method sequentially comprises the following steps: adding an extracting agent to glycerin distillation residues, stirring and filtering out inorganic salt; distilling so as to remove the extracting agent; adding water for dilution, heating to 60-95 DEG C; adding an acidifying agent so as to adjust the pH value to 2.5-6; standing still, and skimming; adding an alkaline solution so as to adjust the pH value to 8-10, thus obtaining a mixed liquid of glycerin, polymerization glycerin and water. The mixed liquid prepared by the method falls in the protection scope of the invention and is applied in a cement grinding-aid reinforcing agent.

Description

Technical field: [0001] The invention belongs to the field of chemical engineering, and in particular relates to a treatment method for glycerin distillation residue and a prepared cement grinding aid. Background technique: [0002] Glycerin distillation residue is the residue in the distillation process of crude glycerin and refined product glycerin, which is about 3% to 5% of the distilled glycerin. The distillation residue is viscous liquid or semi-solid, strongly alkaline, with a pH of about 13. Its main components are glycerin, polyglycerin, sodium chloride, and sodium fatty acid, and it also contains a small amount of residual protein, jelly and pigment, among which polyglycerol has the highest economic value. Japanese Patent Laid-Open No. 49-5911 discloses a method for recovering polymerized glycerol from glycerin distillation residue. [0003] Polyglycerin and glycerol in glycerin distillation residue are all alcohols with strong surface activity, and can be used a...

Claims

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Application Information

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IPC IPC(8): C04B24/02C04B103/52
Inventor 刘松泉郭小梅
Owner JIANGSU JUWEI NEW MATERIALS
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