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Method for preparing organic calcium molding material from alkali reduction waste water

A technology of alkali reduction wastewater and molding materials, which is applied in the field of water treatment, can solve the problems of unused water temperature for reduction, waste of acid and alkali resources, energy loss, etc., to improve mechanical properties, reduce biochemical treatment load, and improve processing The effect of the process

Active Publication Date: 2022-05-13
常州市五好新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional treatment Since the alkali reduction wastewater contains a large amount of unused lye, it needs to consume a large amount of acid to neutralize; at the same time, the temperature of the reduction water is not used
Therefore, conventional treatment has the defects of acid-base resource waste and energy loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing organic calcium molding materials from alkali-reduction waste water of the present invention comprises the following steps:

[0024] (1) After the hot alkali weight loss water from the upstream process passes through the activated carbon filter, it is stored in the storage tank for heat preservation;

[0025] (2) With continuous stirring, add stearic acid into the liquid of (1) under heat preservation until it is completely dissolved, and the pH at the end point is controlled to be 7;

[0026] (3) With continuous stirring, add the pre-configured calcium hydroxide slurry into the solution obtained in step (2), continue stirring and reacting for 20 minutes in a homogenizer with a rotating speed of 2500r / min, centrifuge and dry, that is obtain the target product.

[0027] Further, the mass concentration of sodium terephthalate in the alkali reduction water is 2%.

[0028] Further, the holding temperature of the alkali-reduced water in step (2) is 6...

Embodiment 2

[0033] The difference between embodiment 2 and embodiment 1 is:

[0034] In step (2), the pH of the control end point is 8;

[0035] In step (3), under continuous stirring, add the pre-configured calcium hydroxide slurry into the solution obtained in step (2), continue to stir and react for 40 minutes in a homogenizer with a rotating speed of 1000r / min, centrifuge, After drying, the target product is obtained.

[0036] Further, the mass concentration of sodium terephthalate in the alkali reduction water is 5%.

[0037] Further, the holding temperature of the alkali-reduced water in step (2) is 65°C.

[0038] Further, the mass percent concentration of the calcium hydroxide slurry is 15%.

[0039] Further, the reaction molar ratio of calcium hydroxide to organic acid sodium salt is 1.1:1.

[0040] Furthermore, the activity of lime is 360ml / 4N-HCl.

Embodiment 3

[0042] The difference between embodiment 3 and embodiment 1 is:

[0043] In step (2), the pH of the control end point is 7.5;

[0044] In step (3), under continuous stirring, add the pre-configured calcium hydroxide slurry into the solution obtained in step (2), continue to stir and react for 30 minutes in a homogenizer with a rotating speed of 2000r / min, centrifuge, After drying, the target product is obtained.

[0045] Further, the mass concentration of sodium terephthalate in the alkali reduction water is 3.5%.

[0046] Further, the holding temperature of the alkali-reduced water in step (2) is 70°C.

[0047] Further, the mass percent concentration of the calcium hydroxide slurry is 12%.

[0048] Further, the reaction molar ratio of calcium hydroxide and organic acid sodium salt is 1:1.

[0049] Furthermore, the activity of lime is 400ml / 4N-HCl.

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PUM

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Abstract

The invention discloses a method for preparing organic calcium molding materials from alkali weight reduction wastewater. The preparation method of the organic calcium molding material comprises the steps: (1) the hot alkali decremented water filtered by activated carbon is kept warm and stored in the storage tank; (2) under constant stirring, stearic acid is added to the (1 ) until completely dissolved; (3) Add the calcium hydroxide slurry to the solution obtained in step (2) under continuous stirring, continue to stir and react in the homogenizer for 20-40 minutes, centrifuge and dry, that is obtain the target product. The invention realizes the reduction and high-value utilization of waste water. At the same time, the prepared organic calcium molding material can improve the processing process, reduce energy consumption and improve product performance in polymer materials.

Description

technical field [0001] The invention relates to a method for preparing organic calcium molding materials by utilizing alkali reduction wastewater as a resource, and belongs to the technical field of water treatment. Background technique [0002] Alkali reduction wastewater is a pre-dyeing and finishing wastewater produced in the alkali reduction process of polyester imitation silk. In high-concentration lye, especially under high temperature conditions, the sodium salt of terephthalic acid, ethylene glycol and some oligomers are produced by the hydrolysis of polyester fiber molecules. In the alkali reduction process, 10% to 30% of polyester enters the water, of which the content of terephthalic acid is as high as 75%. At the same time, the alkali reduction wastewater contains a large amount of unused lye, which has high pollutant concentration and high temperature. , high pH value, difficult to degrade, difficult to separate, and high pollution. [0003] At present, the ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/098C08L27/06
CPCC08K5/098C08K2201/014C08L27/06
Inventor 张莉娜蒋丽马沛燕葛红兰华顺香黄海勇祝秋生方春平
Owner 常州市五好新材料科技有限公司
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