Hydrogen peroxide stabilizer
In the oxygen bleaching or retreat, boiling, bleaching bath process, generally in the alkaline medium using hydrogen peroxide, hydrogen peroxide in the weak acidic or neutral conditions is relatively stable, under alkaline conditions are activated, with strong oxidation, and the presence of heavy metal ions so that hydrogen peroxide premature catalytic decomposition, not only cause the failure of the bleaching solution, and will cause fiber damage. Therefore, in order to control the decomposition of hydrogen peroxide in the oxygen bleaching or de-boiling bleaching bath process, to avoid fiber damage, and to obtain a good bleaching effect, in addition to controlling the pH of the bleaching liquid, it is also necessary to add an additive that slows down the decomposition of hydrogen peroxide, which prevents the uncontrolled decomposition of hydrogen peroxide The added additive is called a hydrogen peroxide stabilizer.
Hydrogen peroxide stabilizer properties
Appearance: Light yellow to transparent liquid
Ionicity: anionic
pH: 1-3
Effective content: 30%
Functions that a hydrogen peroxide stabilizer must have:
Stabilized hydrogen peroxide ions [HO2-]; inhibited hydrogen peroxide radicals [HO2·] Resistance to strong alkalis.
Mechanism of action of hydrogen peroxide stabilizer
The mechanism of hydrogen peroxide stabilizer is mainly divided into adsorption theory and complexation theory. The theory of glue group adsorption is mainly to achieve the purpose of stability through the electrostatic or hydrogen bond adsorption of heavy metal ions by polymer glue group. The complexation theory is to form a stable water-soluble complex by chelating with metal ions by chelating with polyvalent chelating agents, thereby preventing heavy metals from catalytic.
Hydrogen peroxide stabilizer type
According to the structure, hydrogen peroxide stabilizer can be divided into two types: silicon-containing oxygen drift stabilizer and non-silicon oxygen drift stabilizer.
According to the mechanism of action: hydrogen peroxide stabilizer can be divided into: chelating stabilizer, adsorption stabilizer, adsorption chelating compound stabilizer.
Most of the stabilizers of chelated hydrogen peroxide are polyvalent complexants of organic acids, which can be complexed with metal ions to form a stable water-soluble complex, so that heavy metal ions do not catalyze.
Common stabilizers of complexed hydrogen peroxide:
Sodium aminotriacetate, sodium edta, sodium diethylenetriamine pentaacetate, etc., as well as aminotrimethylenephosphonate, ethylenediamine tetramethylenephosphonate, diethylenetriamine pentamethylphosphonate. Gluconic acid, malic acid and much more.
Most of the stabilizers of adsorption hydrogen peroxide are inorganic compounds or polymer organic compounds, which are colloidal under certain conditions and have a relatively strong adsorption effect on metal ions, which can inhibit the catalytic decomposition of heavy metal ions for hydrogen peroxide and play a stable role.
Common adsorption hydrogen peroxide stabilizers:
Silicates, adsorbed ionization compounds (such as polymers such as acrylic, maleic acid, and nicrylamide. ）
In addition, there is also a hydrogen peroxide hybrid stabilizer, which is also a hydrogen peroxide oxygen set agent with adsorption capacity and complexation. This hydrogen peroxide stabilizer concentrates the advantages of adsorbed hydrogen peroxide stabilizer and complexed hydrogen peroxide stabilizer.
What a quality hydrogen peroxide stabilizer looks like
1. Excellent adsorption and chelating ability;
2. Can resist different concentrations of alkali agents;
3. Low strong damage to fibers;
4. It has anti-staining performance;
5. It can effectively control the decomposition rate of hydrogen peroxide and has an efficient stabilizing effect;
6, the use will not cause equipment scaling;
7, excellent whiteness;
8. Easy to biodegrade.
Hydrogen peroxide bleaching stabilizer CZYP-01
1. Introduction to hydrogen peroxide bleaching stabilizer
Hydrogen peroxide bleaching stabilizer is a new type of oxygen bleaching efficiency stabilizer that is resistant to high temperature, strong alkali and non-toxic, which is mainly used in the bleaching process of chemical pulp, chemical pulp, mechanical pulp and deinking pulp. It is not easy to hydrolyze, the acid and alkali resistance performance is better than other organic matter, and it is very stable under the conditions of high temperature (200 °C) and high pH, and the effect is obvious.
2. Hydrogen peroxide bleaching stabilizer quality standards
Appearance: Colorless or light yellow transparent liquid
PH value: 10 to 14
Specific gravity: 1.01± 0.02g/cm³
Viscosity: (25 °C) ≤ 100mPa.s
Chelated calcium chelate value: ≥ 20 mg/g (in CaCO3); iron chelation value: ≥ 200 mg /g (in Fe+++)
3. Characteristics of hydrogen peroxide bleaching stabilizer
(1) It can effectively inhibit the catalytic decomposition caused by metal ions on hydrogen peroxide bleach, improve bleaching efficiency, save bleaching liquid, and reduce bleaching costs.
(2) It has a strong capture ability and dispersion effect on fe+++ heavy metal ions, avoids the reaction of fe+++ heavy metal ions with phenol groups in pulp to form a dark color composite, protects fibers, improves pulp whiteness, and reduces pulp yellowing.
(3) It can effectively prevent metal ions such as calcium and magnesium from chemical reactions to form precipitates during the pulp bleaching process.
(4) It has a certain dispersion capacity, which can improve the dispersibility of sodium silicate.
(5) Protect the pulp fiber and prevent the damage of NaOH to the fiber.
4. How to use hydrogen peroxide bleaching stabilizer
The recommended amount of addition is 0.3% to 0.6% of ton pulp.
Hydrogen peroxide bleaching stabilizer CZYP-01 is weighed and added to the process before hydrogen peroxide is added.
5. Hydrogen peroxide bleaching stabilizer packaging
Packed in plastic drums, 200kg/drum or 1000kg/drum.