(1) Naphthalene and the same weight of sulfuric acid sulfonation, the formation of α -naphthalene sulfonic acid, under intense stirring at the same time adding concentrated sulfuric acid and n-butanol, after separation, neutralization, evaporation.
② Naphthalene was mixed with n-butanol, and concentrated sulfuric acid was added. After neutralization and drying, the finished product was obtained. This product is white and light yellow powder, soluble in water. Stable in hard water, salt, acid and weak alkaline solution, in concentrated caustic soda white precipitation, add water after dilution can be re-dissolved.
The product is anion type, water content is not more than 2%, iron content is not more than 0.01%, pH value of 1% aqueous solution 7 ~ 8.5. In addition to strong permeability, it also has emulsification, diffusion and foaming properties, poor cleaning ability, and poor suspension of dust. This product can be widely used as penetrant in scouring, bleaching and dyeing processes. It can also be used as dye cosolvent, acid dye wool dyeing assistant, disperse dye wool dyeing assistant, polyamide blended fabric dyeing assistant, disperse dye polyester/cotton blended fabric dyeing assistant. Chemical properties Off-white or yellowish powder. Soluble in water.
Uses for textile, printing and dyeing, leather and paper industry, as well as insecticide, herbicide wetting agent, paint and ink dispersing agent, rubber industry emulsifier uses Chemicalbook as penetrant in textile printing and dyeing industry. It can also be used as detergent, dye aid, dispersant, wetting agent, insecticide, herbicide and emulsifier in synthetic rubber industry. Use as permeating agent and wetting agent, can be used in various processes of textile printing and dyeing industry, such as enzyme desizing, wool carbonization, cashmere shrinking, chlorination, rayon silk treatment CAS:25638-17-9.
It can also be used as wetting agent in papermaking and lake industry. Adding 10% penetrant BX solution in organic pigment is beneficial to color paste modulation. Used as emulsifier in the preparation of rubber pulp. The product has excellent permeability, wetting, emulsification, diffusion and foaming properties. In acid resistance, alkali resistance, hard water resistance, inorganic salt resistance, adding a small amount of salt can greatly increase the permeability. Widely used in various processes of textile printing and dyeing industry, mainly used as permeating agent and wetting agent, also can be used as detergent, dye aid, dispersant, insecticide and herbicide, etc. Production method Refined naphthalene with butanol, sulfuric acid by sulfonation condensation.
Raw material consumption (kg/t) Refined naphthalene 300 n-butanol 300 sec-octanol 45 Fuming sulfuric acid 840 450 sulfate caustic soda 190 silent powder 100 Production method Dissolve naphthalene 426 parts in 478 n-butanol, add concentrated sulfuric acid 1060 parts under stirring, then add fuming sulfuric acid 320 parts. Gabi was slowly heated to 50-55 ℃ and kept for 6h. After standing, the underlying acid is released. The upper reaction solution is neutralized with alkali, and then bleached with sodium hypochlorite, sedimentation, filtration, spraying and drying to get the finished product.
Post time: May-31-2022