Method for recovering barium in wastewater containing barium isobutyric acid through carbonate precipitation method

A technology of carbonate precipitation and barium isobutyrate, which is applied in barium carbonate, calcium carbonate/strontium/barium, chemical instruments and methods, etc., can solve problems such as difficult processing, unreported heavy metal ion recovery methods, etc., and achieve COD value low effect

Inactive Publication Date: 2018-08-14
宁波永顺精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is suitable for wastewater containing carboxylate ions with a low mass concentration (concentration ≤ 100ml / L), and it is difficult to treat wastewater containing high-concentration barium isobutyrate
[0007] At present, there is no report on the recovery method of heavy metal ions in isobutyrate-containing wastewater

Method used

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  • Method for recovering barium in wastewater containing barium isobutyric acid through carbonate precipitation method
  • Method for recovering barium in wastewater containing barium isobutyric acid through carbonate precipitation method

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Embodiment 1

[0034] Embodiment 1, a kind of carbonate precipitation method reclaims the method containing barium in barium isobutyrate waste water, carries out following steps successively:

[0035] 1), 20g (0.19mol) of sodium carbonate was dissolved in water to prepare a saturated sodium carbonate solution, which was added dropwise at 20°C to 100g of barium isobutyrate waste water (containing 0.16mol of barium ions) with a mass fraction of 50%. During the addition process, the temperature is controlled to be ≤30°C. After the dropwise addition is completed, the measured pH is about 10;

[0036] 2), filtering (filtering immediately after the dropwise addition) the reaction solution obtained in step 1) to obtain the filtrate and filter cake respectively; The ion recovery rate is 100%;

[0037] In the filtrate (filtered gained aqueous phase), adding mass fraction is 128g (containing HCl 0.35mol) of dilute hydrochloric acid (HCl 0.35mol) of 10%, this moment, pH is about 2; 121 ° C fraction),...

Embodiment 2

[0039] Embodiment 2, a kind of carbonate precipitation method reclaims the method containing barium in barium isobutyrate waste water, carries out following steps successively:

[0040] 1), potassium carbonate 26.2g (0.19mol) is dissolved in water and is mixed with saturated potassium carbonate solution, and is added dropwise at 20 ℃ in the barium isobutyrate waste water 100g (containing barium ion 0.16mol) that mass fraction is 50%, During the dropping process, the temperature is controlled to be ≤30°C. After the addition is completed, the measured pH is about 10;

[0041] 2), filter (filter immediately after dropwise addition) step 1) gained reaction solution, obtain filtrate and filter cake respectively; Obtain barium carbonate 31g (0.16mol) after filter cake drying, barium ion recovery rate 100%;

[0042] In filtrate, adding mass fraction is 128g (containing HCl 0.35mol) of dilute hydrochloric acid (HCl 0.35mol) of 10%, and now pH is about 2; Rectification under reduced pr...

Embodiment 3

[0044] Embodiment 3, a kind of carbonate precipitation method reclaims the method containing barium in barium isobutyrate waste water, carries out following steps successively:

[0045] 1), ammonium carbonate 18g (0.19mol) is dissolved in water and is mixed with saturated ammonium carbonate solution, is added dropwise in the barium isobutyrate waste water 100g (containing barium ion 0.16mol) that mass fraction is 50% at 20 ℃, drop During the addition process, the temperature is controlled to be ≤30°C. After the addition is completed, the measured pH is about 10;

[0046] 2), filter (filter immediately after dropwise addition) step 1) gained reaction solution, obtain filtrate and filter cake respectively; Obtain barium carbonate 31g (0.16mol) after filter cake drying, barium ion recovery rate 100%;

[0047] In filtrate, adding mass fraction is 128g (containing HCl 0.35mol) of dilute hydrochloric acid (HCl 0.35mol) of 10%, and now pH is about 2; Rectification under reduced press...

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Abstract

The invention discloses a method for recovering barium in wastewater containing barium isobutyric acid through a carbonate precipitation method. The method comprises the following steps of (1) dropwise adding a carbonate saturated solution into the barium isobutyric acid wastewater, and thus producing a barium carbonate sediment, wherein the molar ratio of barium ions to carbonate in the barium isobutyric acid wastewater is 1:(1 to 2); during a dropwise adding process, controlling the temperature to be less than or equal to 30 DEG C; (2) filtering a reaction liquid obtained through the step (1) to obtain filter liquid and a filter cake, wherein the filter cake is barium carbonate; collecting. The method provided by the invention can be used for treating the high-concentration barium isobutyric acid wastewater; after treatment through the method, the barium in the wastewater can be completely recovered, isobutyric acid radical roots are transformed into valuable isobutyric acid, and thewastewater is low in COD (Chemical Oxygen Demand) value and near colorless.

Description

technical field [0001] The invention relates to a method for recovering barium ions in waste water containing barium isobutyrate produced in an alcohol ester twelve synthesis process, in particular to a method for recovering barium in waste water containing barium isobutyrate by a carbonate precipitation method. Background technique [0002] Alcohol ester twelve is an excellent film-forming aid. When it is synthesized, a barium-containing base is used as a catalyst to generate waste water containing barium isobutyrate. The wastewater has a high COD value, and the isobutyrate ions and barium ions in it will pollute the environment if they are not treated. [0003] The existing methods for treating wastewater containing carboxylate ions and metal ions are as follows: [0004] Patent No. CN201610039104 reports that after the wastewater containing isobutyrate is mixed with acid-binding agent and haloalkane, the nucleophilic substitution reaction between haloalkane and isobutyr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C02F9/10C02F101/20
CPCC01F11/188C02F1/001C02F1/04C02F1/66C02F9/00C02F2101/20
Inventor 韦隆武魏慧龙张小莲陈新发
Owner 宁波永顺精细化工有限公司
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