Application in printing and dyeing

(a) for

softener

trisodium orthophosphate

boiler

Water furnace treating agent.

Note: 1. Trisodium phosphate can react with soluble calcium and magnesium salts which are easy to scale in water to form insoluble substances.

calcium phosphate

Ca3(po4)2, mg3(po4)2 and other precipitates are suspended in water, so the boiler will not scale.

2. At the same time, excessive trisodium phosphate can also make the cooked scales soft and fall off. Thereby saving the coal consumption of the boiler, maintaining the safety of the boiler and prolonging the service life of the boiler. The reaction formula is as follows: 3caso4+2na3po4 → 3Na2so4+CA3 (PO4) 2 ↓ 3mgso4+2na3po4 → 3Na2so4+Mg3 (PO4).

(2) Cotton boiling water used as cotton boiling assistant contains hardness, and appropriate amount of trisodium phosphate should be added as a water softener. Its advantage is that it can improve the capillary effect of fabric.

Note: 1. After softening hard water, trisodium phosphate will burn in the training solution. Isn't it consumed by hard water to promote combustion? Scouring effect of cotton fabric.

2. Trisodium phosphate reacts with calcium and magnesium salts in hard water to become insoluble calcium phosphate and magnesium phosphate; These phosphates are non-sticky and do not stick to fabrics like calcium and magnesium salts of soap. In addition, it also has the functions of penetration and emulsification.

3. Under general water hardness, the dosage of trisodium phosphate is about 0.5 ~1g/L. ..

(3) As a detergent and metal cleaner, trisodium phosphate has a greasy feeling when dissolved in water, which can increase the wetting ability of water and has a certain emulsifying effect. It is an excellent cleaner for removing dirt on hard surfaces and metal surfaces.

Note: 1. The laboratory can clean bottles with 1% trisodium phosphate solution to remove dirt.

2. Before the chromium plating on the printing cylinder, 5% trisodium phosphate solution can be used to clean the oily surface of the copper cylinder, so as to promote the smooth chromium plating on the cylinder.