Multifunctional environment-friendly chelating dispersant as well as preparation method and application thereof

Abstract

The invention discloses a multifunctional environment-friendly chelating dispersant and a preparation method and application thereof.The multifunctional environment-friendly chelating dispersant is prepared from, by mass, 10-30 parts of amino carboxylate, 10-30 parts of maleic acid-acrylic acid copolymer, 5-10 parts of citric acid, 5-10 parts of sodium citrate, 5-10 parts of sodium gluconate and 20-65 parts of deionized water; the amino carboxylate is at least one of methylglycine diacetate or alkali metal salt thereof, glutamic acid diacetate or alkali metal salt thereof, and iminodisuccinate or alkali metal salt thereof. The multifunctional environment-friendly chelating dispersant disclosed by the invention is a phosphorus-free chelating dispersant, is particularly suitable for a dyeing and finishing process, has excellent chelating and dispersing capacity, does not contain phosphorus element, and provides a new choice for the field of textile dyeing and finishing auxiliaries.

Description

Technical Field

[0001] The invention relates to a multifunctional environmentally friendly chelating dispersant and a preparation method and application thereof, belonging to the technical field of textile printing and dyeing. Background Art

[0002] The chelating agents used in the printing and dyeing industry mainly include inorganic polyphosphates, aminocarboxylic acid chelating agents, hydroxycarboxylic acid chelating agents, organic phosphates, polycarboxylic acid chelating agents, etc.

[0003] Existing chelating dispersants usually contain phosphorus, which is a necessary factor for the growth of aquatic organisms. The appropriate phosphorus content in the water body has a certain promoting effect on the growth of plants, but excessive accumulation of phosphorus in the water body will cause eutrophication of the water body. The eutrophication of the water body is manifested as: large-scale uncontrollable reproduction of algae, resulting in the death of a large number of fish and shrimp, and then the deterioration of water quality. Phosphorus-free EDTA is a particularly difficult compound to degrade in the water environment. It can transfer heavy metal ions from solid substances to aqueous solutions, thus extending the scope and period of toxic metal hazards. NTA has a strong chelating ability and is cheap, but its use is restricted due to disputes over toxicity and safety. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a multifunctional environmentally friendly chelating dispersant and a preparation method and application thereof.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts a multifunctional environmentally friendly chelating dispersant, which comprises the following raw materials by weight: 10-30 parts of aminocarboxylates, 10-30 parts of maleic acid-acrylic acid copolymers, 5-10 parts of citric acid, 5-10 parts of sodium citrate, 5-10 parts of sodium gluconate, and 20-65 parts of deionized water;

[0006] The aminocarboxylate is at least one of methylglycine diacetate or its alkali metal salt, glutamic acid diacetate or its alkali metal salt, and iminodisuccinate or its alkali metal salt.

[0007] As an improvement, the methylglycine diacetate or its alkali metal salt is at least one of methylglycine diacetate and methylglycine diacetate trisodium, CAS No. 164462-16-2.

[0008] As an improvement, the glutamic acid diacetate or its alkali metal salt is at least one of glutamic acid diacetic acid and tetrasodium glutamic acid diacetate. Tetrasodium glutamic acid diacetate (GLDA-Na4), CAS No. 51981-21-6.

[0009] As an improvement, the iminodisuccinate or its alkali metal salt is at least one of iminodisuccinic acid and iminodisuccinic acid tetrasodium salt. Iminodisuccinic acid tetrasodium salt (IDS-Na4), CAS No. 144538-83-0.

[0010] As an improvement, the invention further comprises a pH regulator, wherein the pH regulator is 50% sodium hydroxide or glacial acetic acid.

[0011] In addition, the present invention also provides a method for preparing the multifunctional environmentally friendly chelating dispersant, comprising the following steps:

[0012] (1) Add deionized water into the reactor and heat it to 25°C-65°C;

[0013] (2) Adding aminocarboxylate to the reactor and stirring for 15-25 minutes;

[0014] (3) Continue to add maleic acid-acrylic acid copolymer, citric acid, sodium citrate, and sodium gluconate, mix and stir until dissolved evenly, and finally add a pH adjuster to adjust the pH to 4-6.

[0015] Finally, the present invention also provides an application of the multifunctional environmentally friendly chelating dispersant or the multifunctional environmentally friendly chelating dispersant prepared by the preparation method in textile printing and dyeing auxiliaries.

[0016] Compared with the prior art, the multifunctional environmentally friendly chelating dispersant of the present invention is a phosphorus-free chelating dispersant, which is particularly suitable for dyeing and finishing processes, has excellent chelating and dispersing capabilities, does not contain phosphorus elements, and provides a new choice for the field of textile dyeing and finishing auxiliaries. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clear, the technical solutions of the present application are described in detail through specific embodiments below. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0018] The raw materials used in the present invention are all common commercially available products, and their sources are not specifically limited.

[0019] Example 1

[0020] A multifunctional environmentally friendly chelating dispersant, comprising, by weight: 20 grams of trisodium methylglycine diacetate ( M), maleic acid-acrylic acid copolymer (our company's product, model number is anti-stain soap agent QUALISOAP 4200) 15 grams, citric acid 5 grams, sodium citrate 10 grams, sodium gluconate 5 grams, deionized water 45 grams;

[0021] The following steps are involved:

[0022] (1) Deionized water is added into the reactor and heated to 25°C;

[0023] (2) adding trisodium methylglycine diacetate to the reactor and stirring for 15 minutes;

[0024] (3) Continue to add maleic acid-acrylic acid copolymer, citric acid, sodium citrate, and sodium gluconate, mix and stir until dissolved evenly, and finally add 0.1 g of glacial acetic acid to adjust the pH to 5.

[0025] Example 2

[0026] A multifunctional environmentally friendly chelating dispersant, comprising, by weight: 30 grams of tetrasodium glutamate diacetate (Yuanlian GLDA-Na4), 15 grams of maleic acid-acrylic acid copolymer (a product independently developed by the company, anti-staining soaping agent QUALISOAP 4200), 5 grams of citric acid, 10 grams of sodium citrate, 5 grams of sodium gluconate, and 35 grams of deionized water;

[0027] The following steps are involved:

[0028] (1) Deionized water is added into the reactor and heated to 30°C;

[0029] (2) adding tetrasodium glutamate diacetate to the reactor and stirring for 20 minutes;

[0030] (3) Continue to add maleic acid-acrylic acid copolymer, citric acid, sodium citrate, and sodium gluconate, mix and stir until dissolved evenly, and finally add 0.05 g of glacial acetic acid to adjust the pH to 5.

[0031] Example 3

[0032] A multifunctional environmentally friendly chelating dispersant, comprising, by weight: 20 grams of iminodisuccinic acid, 25 grams of maleic acid-acrylic acid copolymer (a product independently developed by the company, anti-staining soap detergent QUALISOAP 4200), 5 grams of citric acid, 5 grams of sodium citrate, 5 grams of sodium gluconate, and 40 grams of deionized water;

[0033] The following steps are involved:

[0034] (1) Deionized water is added into the reactor and heated to 35°C;

[0035] (2) adding iminodisuccinic acid to the reactor and stirring for 25 min;

[0036] (3) Continue to add maleic acid-acrylic acid copolymer, citric acid, sodium citrate, and sodium gluconate, mix and stir until dissolved evenly, and finally add 0.05 g of glacial acetic acid to adjust the pH to 5.

[0037] Example 4

[0038] A multifunctional environmentally friendly chelating dispersant, comprising, by weight: 20 grams of trisodium methylglycine diacetate, 10 grams of maleic acid-acrylic acid copolymer (a product independently developed by the company, anti-staining soap detergent QUALISOAP 4200), 5 grams of citric acid, 5 grams of sodium citrate, 5 grams of magnesium chloride, 5 grams of magnesium sulfate, 5 grams of sodium gluconate, and 45 grams of deionized water;

[0039] The following steps are involved:

[0040] (1) Deionized water is added into the reactor and heated to 35°C;

[0041] (2) adding trisodium methylglycine diacetate to the reactor and stirring for 20 minutes;

[0042] (3) Continue to add maleic acid-acrylic acid copolymer, citric acid, sodium citrate, magnesium chloride, magnesium sulfate, and sodium gluconate, mix and stir until dissolved evenly, and finally add 0.05 g of glacial acetic acid to adjust the pH to 5.

[0043] According to GB / T 21884-2008 “Determination of Chelating Capacity of Chelating Agents for Textile Dyeing and Printing Auxiliary Agents”, the multifunctional environmentally friendly chelating dispersant prepared in the example was tested for performance. The dispersibility formula and process conditions are shown in Table 1 and Table 2.

[0044] Table 1 Dispersion formula and process conditions

[0045]

[0046] The process is as follows: bath ratio 1:10, run in the cylinder at room temperature for 20 minutes, add sodium sulfate and run for 20 minutes, add soda ash and run for 20 minutes, heat up to 60°C at a rate of 1.0°C / min for 40 minutes, filter with filter paper and vacuum pump, and leave the bottom of the filter paper to compare the dispersion strength.

[0047] Table 2 Chelation value and dispersion test results

[0048]

[0049] Gross effect and white work test:

[0050] Table 3 Refining formula and process

[0051]

[0052]

[0053] The process is as follows: bath ratio 1:10, 98℃×45′ hot washing (above 95℃) three times → cold water washing → dehydration and drying → testing whiteness and gross effect.

[0054] Table 4 Whiteness and gross effect results

[0055]

[0056] Hydrogen peroxide decomposition rate test, in accordance with HGT 4916-2016 "Determination of the stability of hydrogen peroxide by hydrogen peroxide stabilizers in textile dyeing and finishing auxiliaries";

[0057] Table 5 Hydrogen peroxide decomposition rate formula and process

[0058] Additives / Process ① ② ③ NaOH (100%) 2g / L 2g / L 2g / L <![CDATA[H 2 THE 2 (50%)]]> 4g / L 4g / L 4g / L Our company's refining agent QH-1369J 1g / L 1g / L 1g / L Market Product Hydrogen Peroxide Stabilizer 2g / L -- -- Example 4 -- 2g / L -- blank -- -- water

[0059] Among them, the process is: adding cloth, bath ratio 1:10, and the decomposition rate of hydrogen peroxide at room temperature, 98℃×0′, 98℃×15′, 98℃×30′, 98℃×45′, and 98℃×60′ were tested respectively.

[0060] Table 6 Hydrogen peroxide decomposition rate

[0061]

[0062] Among them, the working solution was prepared according to the boiling formula, 5 ml of the working solution and 10 ml of 3 mol / L sulfuric acid solution were taken, water was added to 100 ml, and 0.1 mol / L potassium permanganate was used for titration. The potassium permanganate consumed was sampled and titrated at different times to compare the decomposition rate of hydrogen peroxide.

[0063] The test results of the above tables are:

[0064] (1) The higher the test value of the chelation value in Table 2, the better the chelation force.

[0065] (2) The dispersibility rating in Table 2 is compared with the rating of the blank sample without the chelating dispersant to characterize the alkali-resistant integrated dispersibility of the chelating dispersant. The higher the rating, the better the alkali-resistant integrated dispersibility of the chelating dispersant, and vice versa. The coagulation of the precipitated particles on the filter paper is evaluated, and the rating results are described as follows: a total of 5 levels and 9 grades, which are 5, 4, 3, 2, and 1, respectively. Examples 1 to 3 of the present invention are all 4.

[0066] (3) Dispersion force judgment criteria in Table 2: Dye particle agglomeration is poor, and no dye particle agglomeration is good.

[0067] (4) In the whiteness and hair effect results in Table 4, the larger the value, the better.

[0068] (5) In the hydrogen peroxide decomposition rate in Table 6, according to HG / T 4916-2016 “Determination of the stability of hydrogen peroxide by hydrogen peroxide stabilizers in textile dyeing and finishing auxiliaries”, the hydrogen peroxide decomposition rate of the solution with hydrogen peroxide stabilizer was compared with the hydrogen peroxide decomposition rate of the solution without hydrogen peroxide stabilizer. The lower the decomposition rate, the better the stability of hydrogen peroxide by hydrogen peroxide stabilizer, and vice versa.

[0069] From the performance test results of each embodiment in the above table, it can be seen that the multifunctional environmentally friendly chelating dispersant provided by Embodiment 1, Embodiment 2, Embodiment 3, and Embodiment 4 of the present invention has excellent chelating performance, which is better than the performance of commercially available products as a whole.

Claims

1. A multifunctional environmentally friendly chelating dispersant, characterized in that: The raw materials include the following by weight: 10-30 parts of aminocarboxylate, 10-30 parts of maleic acid-acrylic acid copolymer, 5-10 parts of citric acid, 5-10 parts of sodium citrate, 5-10 parts of sodium gluconate, and 20-65 parts of deionized water; The aminocarboxylate is at least one of methylglycine diacetate or its alkali metal salt, glutamic acid diacetate or its alkali metal salt, and iminodisuccinate or its alkali metal salt.

2. A multifunctional environmentally friendly chelating dispersant according to claim 1, characterized in that: The methylglycine diacetate or its alkali metal salt is at least one of methylglycine diacetate and methylglycine diacetate trisodium.

3. A multifunctional environmentally friendly chelating dispersant according to claim 1, characterized in that: The glutamic acid diacetate or its alkali metal salt is at least one of glutamic acid diacetic acid and tetrasodium glutamate diacetate.

4. A multifunctional environmentally friendly chelating dispersant according to claim 1, characterized in that: The iminodisuccinate or its alkali metal salt is at least one of iminodisuccinic acid and iminodisuccinic acid tetrasodium salt.

5. A multifunctional environmentally friendly chelating dispersant according to claim 1, characterized in that: The invention also comprises a pH regulator, which is 50% sodium hydroxide or glacial acetic acid.

6. A method for preparing the multifunctional environmentally friendly chelating dispersant according to any one of claims 1 to 5, characterized in that: The following steps are involved: (1) Add deionized water into the reactor and heat it to 25°C-65°C; (2) Adding aminocarboxylate to the reactor and stirring for 15-25 minutes; (3) Continue to add maleic acid-acrylic acid copolymer, citric acid, sodium citrate, and sodium gluconate, mix and stir until dissolved evenly, and finally add a pH adjuster to adjust the pH to 4-6.

7. Use of the multifunctional environmentally friendly chelating dispersant according to any one of claims 1 to 5 or the multifunctional environmentally friendly chelating dispersant prepared by the preparation method according to claim 6 in textile printing and dyeing auxiliaries.

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