Kvapalný kremičitan sodný je bezfarebná až mierne červenkastá priehľadná alebo priesvitná viskózna kvapalina. Je obľúbený pre svoju vysokú viskozitu, tepelnú odolnosť a dobrú vodeodolnosť.
V stavebníctve sa tekutý kremičitan sodný používa ako zvýrazňovač betónu a malty, čím sa zlepšuje pevnosť a trvanlivosť materiálu. Okrem toho hrá dôležitú úlohu v oblastiach, ako je textil, výroba papiera a ťažba ropy. Používa sa napríklad ako glejivo na textílie, lepidlo pri výrobe papiera a prísada do vrtných kvapalín pre ropné polia.
Pri skladovaní a používaní tekutého kremičitanu sodného je potrebné postupovať opatrne vzhľadom na jeho silnú zásaditosť a vyhýbať sa priamemu kontaktu s pokožkou a očami.
Úvod V priemyselných aplikáciách, kremičitan sodný a kremičitan draselný sú dve bežne používané anorganické zlúčeniny. Tieto zlúčeniny majú široký rozsah použitia, vrátane úpravy vody, lep...
ČÍTAŤ VIACÚvod Kremičitan draselný , vo vode rozpustný alkalický kremičitan, si získal širokú pozornosť vo viacerých priemyselných odvetviach vďaka svojej jedinečnej kombinácii chemickej stability, v...
ČÍTAŤ VIACÚvod Silikáty sú základné chemické zlúčeniny široko používané v rôznych odvetviach od poľnohospodárstva až po stavebníctvo. Medzi nimi kremičitan draselný a kremičitan sodný získali osobitnú pozornosť v...
ČÍTAŤ VIACLiquid sodium silicate (Na2O·nSiO2, commonly known as "water glass") plays an important role in the textile and papermaking industry due to its excellent adhesion, pH adjustment ability, stability and environmental protection characteristics. This article will explore its functional principles and industrial applications in dyeing auxiliary, bleaching stabilizer, etc.
(1) As a dyeing auxiliary
Functional principle:
pH buffer: Sodium silicate solution is alkaline (pH 11~12), which can maintain a stable pH environment in the dye bath and promote the chemical bonding of active dyes with fibers (such as cotton and linen).
Dispersant: Prevents dye aggregation, improves dyeing uniformity, and reduces color spots.
Soaping auxiliary: Helps remove unfixed dyes in the subsequent soaping process and improves color fastness.
Application cases:
Used in dyeing cotton fabrics with reactive dyes, it can reduce the amount of electrolytes (such as sodium sulfate) used and reduce costs.
(2) Stabilizer in bleaching process
Synergistic effect with hydrogen peroxide (H₂O₂):
Sodium silicate can stabilize the decomposition rate of hydrogen peroxide to avoid fiber damage (such as holes in cotton cloth) caused by too fast decomposition.
By complexing heavy metal ions (such as Fe³⁺, Cu²⁺), it prevents catalytic side reactions and improves bleaching efficiency.
Alternative solutions:
Under the trend of environmental protection, some companies have switched to organic stabilizers (such as EDTA substitutes), but sodium silicate is still widely used due to its low cost and stable effect.
(1) Pulp Bleaching Stabilizer
Chemical pulp bleaching (such as KP process, sulfate pulp):
In the ECF (elemental chlorine-free bleaching) and TCF (total chlorine-free bleaching) processes, sodium silicate is combined with H₂O₂ to improve whiteness and reduce fiber degradation.
Inhibit the ineffective consumption of bleaching agents by transition metal ions and reduce the amount of chemicals used.
Waste paper deinking process:
Enhance the effect of deinking agents, help separate ink particles, and improve the quality of recycled pulp.
(2) As a retention aid
The colloidal properties of sodium silicate can improve the retention rate of fine fibers and fillers and reduce the loss of raw materials in the papermaking process.
Environmental pressure: Highly alkaline wastewater needs to be neutralized and treated, which promotes the research and development of low-alkali modified sodium silicate.
Alternative materials: such as silicate-magnesium salt composite system, which takes into account stability and environmental friendliness.
Intelligent control: Optimize the amount of sodium silicate added by real-time monitoring of pH and metal ion concentration.