Resourceful treatmentmethod for isobutyrate waste water

A treatment method and resource recovery technology, which is applied in the field of resource recovery of isobutyrate wastewater, can solve the problems of increasing equipment corrosion and unexplained problems, and achieve the effect of reducing the difficulty and cost of treatment

Active Publication Date: 2017-09-19
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that this method is carried out under pressurized conditions and there are halogen elements, the corrosion to the equipment is increased, and the addition of the acid-binding agent makes the inorganic salts present in the water phase after esterification, how to deal with the water phase also not clarified

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] at 20m 3 Add 10m 3 For sodium isobutyrate wastewater with a mass fraction of 30%, slowly add 1.4 tons of 98% concentrated sulfuric acid at room temperature, keep the temperature at 35°C, then add 1 ton of anhydrous sodium sulfate, stir for 0.5h, and then let stand to separate layers. After the oil-water phase, the isobutyric acid in the obtained oil phase was 2.35 tons, and the separated oil phase was recovered through the refining process to obtain the isobutyric acid product. A total of 10.05 tons of water phase, after testing, the mass fraction of isobutyric acid in the water phase is 0.5%.

[0028] The obtained water phase is heated and evaporated, and 15% of the water phase weight is evaporated to be a condensate, and the rest is a distilled water phase; the quality of the condensate obtained is 1.51 tons, and the mass fraction of isobutyric acid in the condensate is 3.31%. Add 0.45 tons of anhydrous sodium sulfate to this condensate to carry out salting-out, aft...

Embodiment 2

[0031] at 20m 3 Add 10m 3 For sodium isobutyrate wastewater with a mass fraction of 34%, slowly add 1.59 tons of 98% concentrated sulfuric acid at room temperature, keep the temperature at 55°C, then add 1 ton of anhydrous sodium sulfate, stir for 0.5h, and then let stand to separate layers. After the oil-water phase, the isobutyric acid in the obtained oil phase was 2.67 tons, and the separated oil phase was recovered through the refining process to obtain the isobutyric acid product. A total of 9.92 tons of water phase, after testing, the mass fraction of isobutyric acid in the water phase is 0.5%.

[0032] The obtained water phase is heated and evaporated, and 15% of the water phase weight is evaporated to be a condensate, and the rest is a distilled water phase; the quality of the condensate obtained is 1.49 tons, and the mass fraction of isobutyric acid in the condensate is 3.36%. Add 0.37 tons of anhydrous sodium sulfate to this condensate to carry out salting-out, aft...

Embodiment 3

[0035] at 20m 3 Add 10m 3 For sodium isobutyrate wastewater with a mass fraction of 25%, slowly add 1.17 tons of 98% concentrated sulfuric acid at room temperature, keep the temperature at 32°C, then add 2 tons of anhydrous sodium sulfate, stir for 0.5h, and then let stand to separate layers. After the oil-water phase, the isobutyric acid in the obtained oil phase was 1.92 tons, and the separated oil phase was recovered through the refining process to obtain the isobutyric acid product. A total of 11.25 tons of water phase, after testing, the mass fraction of isobutyric acid in the water phase is 0.71%.

[0036]The obtained water phase is heated and evaporated, and 15% of the water phase weight is evaporated to be a condensate, and the rest is a distilled water phase; the quality of the condensate obtained is 1.69 tons, and the mass fraction of isobutyric acid in the condensate is 4.74%. Add 0.25 tons of anhydrous sodium sulfate to this condensate to carry out salting-out, a...

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Abstract

The invention discloses a resourceful treatment method for isobutyrate waste water, and relates to the technical field of comprehensive utilization of industrial waste. The method includes the steps: enabling isobutyrate to transform into water solution of isobutyric acid and sulfate by the aid of concentrated sulfuric acid; enabling the content of isobutyric acid in sulfate water solution to reduce to 0.5-1wt% at the salting-out temperature ranges from 32 DEG C to 75 DEG C under the salting-out action of sodium sulfate; performing simple distillation, and enabling COD (chemical oxygen demand) in a water phase to reduce to 2000mgO2/L or less. The mass fraction of organic matters in obtained sodium sulfate or calcium sulfate is lower than 0.2wt%, the organic matters can serve as product to be sold, the obtained isobutyric acid can be circularly used for production of sixteen alcohol ester after be refined, and the isobutyrate waste water is recycled.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of chemical waste, in particular to a method for resourceful treatment of isobutyrate wastewater. Background technique [0002] 2,2,4-Trimethyl-1,3-pentanediol monoisobutyrate (alcohol ester dodeca) and 2,2,4-trimethyl-1,3-pentanediol diisobutyrate Ester (alcohol ester sixteen) is a non-water-soluble high-boiling glycol ester and a new type of green film-forming aid. [0003] Alcohol ester twelve and alcohol ester sixteen are all based on isobutyraldehyde (CN105541583, CN10472367, CN101948386, CN101863762, CN101838197, CN1091094, CN106008157), first under the action of alkaline catalyst (sodium hydroxide or calcium hydroxide) , using water as a solvent, through aldol condensation to obtain 2,2,4-trimethyl-3-hydroxypentanal, 2,2,4-trimethyl-3-hydroxypentanal and isobutyraldehyde are disproportionated esters Chemical reaction to obtain 2,2,4-trimethyl-1,3-pentanediol monoisobutyr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01F11/46C01D5/16C07C51/42C07C53/124C02F103/36
CPCC01D5/16C01F11/468C01P2006/80C02F1/04C02F1/5236C02F9/00C02F2103/36C07C51/42C07C53/124
Inventor 乔旭陈献张颖陈伟民费兆阳刘清崔咪芬汤吉海张竹修
Owner NANJING UNIV OF TECH
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