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A kind of solvent waste liquid solidification processing method

A treatment method and solidification technology, applied in natural water treatment, chemical instruments and methods, chemical liquid solidification, etc., can solve the problems of failure to meet customer recycling standards, only downgraded use, and high treatment prices

Active Publication Date: 2021-12-31
ZHEJIANG NAMEI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Enterprises that produce a large amount of solvent waste liquid or enterprises with good conditions generally separate a part of the solvent for reuse through simple distillation or rectification of these solvent waste liquids, but the recovered solvents usually have poor quality indicators and cannot reach Customers return to the standard and can only be downgraded
Most of the small enterprises or enterprises that generate less solvent waste liquid do not have solvent recovery and treatment devices, and when they are collected and transported to specialized companies for treatment, there is also the inconvenience of liquid transportation, and factors such as high treatment prices result in a safe disposal rate. Low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for solidifying solvent waste liquid, comprising the following steps:

[0025] (1) Measure the optical density of the solvent waste liquid. The composition of the solvent waste liquid is ethyl acetate: butyl acetate: isopropanol = 45:45:10, and the optical density is 0;

[0026] (2) Configure curing varnish, by weight, 20 parts of 2-functional epoxy acrylic resin, 20 parts of propane trimethylol triacrylate (functionality is 3-functional), 3 parts of photoinitiator TPO, 0.02 parts of additives Mix to obtain cured varnish;

[0027] (3) Mix the solidified varnish and the solvent waste liquid at a mass ratio of 0.3:1;

[0028] (4) Curing the mixed liquid in step (3) under the condition of sunlight, and it can be completely cured in about 0.5 minutes;

[0029] The hardness of the cured solid was measured using a pencil hardness tester. Designed and manufactured according to GB / T5739-1996, the instrument is mechanical, with three points of contact with the surfac...

Embodiment 2

[0033] A method for solidifying solvent waste liquid, comprising the following steps:

[0034] (1) Take the solvent waste liquid to measure the optical density, and the optical density is 0.6;

[0035] (2) To configure curing varnish, 50 parts by weight of polyurethane acrylic resin with a functionality of 6, 25 parts of dipentaerythritol penta / hexaacrylate with a functionality of 6, 5 parts of initiator 819, and 0.08 parts of additives Mix to obtain cured varnish;

[0036] (3) Mixing the solidified varnish and the solvent waste liquid in a mass ratio of 0.7:1;

[0037] (4) Curing the mixed liquid in step (3) under the condition of natural light for 10 minutes can be completely cured.

[0038] Referring to the test method in Example 1, the hardness of the solid solidified by the preparation method in this example is measured as 1H.

Embodiment 3

[0040] A method for solidifying solvent waste liquid, comprising the following steps:

[0041] (1) Take the solvent waste liquid to measure the optical density, and the optical density is 0.8;

[0042] (2) To configure curing varnish, 25 parts by weight of polyester propionic acid resin with a functionality of 4, 26 parts of dipentaerythritol penta / hexaacrylate with a functionality of 6; 5 parts of initiator 907, 0.09 Parts of additives are mixed to obtain cured varnish;

[0043] (3) Mixing the solidified varnish and the solvent waste liquid in a mass ratio of 2:1;

[0044](4) Curing the mixture in step (3) for 13 minutes under the condition of natural light can be completely cured.

[0045] Referring to the test method in Example 1, it is measured that the hardness of the solid solidified by the preparation method in this example is 2H.

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Abstract

The invention provides a solidification treatment method of solvent waste liquid, which belongs to the technical field of paint wastewater treatment, and comprises the following steps: (1) taking solvent waste liquid to measure the optical density; (2) configuring solidified varnish, and adding 20- Mix 70 parts of photocurable acrylic oligomer, 20-40 parts of photocurable acrylic monomer, 3-10 parts of initiator, and 0.02-1 part of auxiliary agent to obtain cured varnish; (3) mix cured varnish and solvent waste liquid according to The mass ratio is 0.3‑10:1; (4) The mixture in step (3) is cured under light conditions. The invention solidifies the solvent waste liquid through light curing. During the polymerization process, the resin will form a cross-linked network structure, and the solvent waste liquid molecules will enter into the network structure, and will be locked during the curing process, thereby fixing the solvent waste liquid in the resin to form a whole. The curing process is simple, the curing time is short, the transportation is convenient, and the solvent waste liquid is easy to handle.

Description

technical field [0001] The invention belongs to the technical field of paint wastewater treatment, and in particular relates to a solidification treatment method for solvent waste liquid. Background technique [0002] Coating waste liquid refers to the waste solvent produced in the coating production process that cannot be reused without treatment. Paint wastewater mainly comes from the cleaning of batching tanks and reaction kettles and the process of preparing paints of different colors. Wastewater has a high concentration of organic matter, high chroma and suspended matter content; in addition, it also contains a large number of nano-scale inorganic materials, such as titanium dioxide, kaolin and various colored pigments. [0003] The production and use of paint technology in my country is large and fast-growing, and the paint wastewater produced by it has also increased accordingly. Paint wastewater contains a large amount of organic solutions, which cannot be directly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30B01J19/06B01J19/12C08F283/10C08F222/14C08F2/48C02F103/38
Inventor 王群凌燕赵磊张涛何贵平
Owner ZHEJIANG NAMEI MATERIAL TECH