The basic information
English name: 2 - Hydroxy - 4 - Methoxybenzophenone - 5 - Sulfonic Acid
Alias: UV absorber UV - 284, diphenyl ketone - 4, sunscreen, BP - 4 3
CASNo.: 4065-45-6
EINECS no.: 223-772-2
Molecular formula: C14H12O6S
Molecular weight: 308.31
The physical and chemical indicators
Appearance: this product is a pale yellow crystal.
Melting point: 170 ° C
Solubility: soluble in water
Content: 99% or higher
Dry weight loss: 5% or less
PH: 1.2 to 2.2
Aqueous solution turbidity: 2.0 EBC or less
Colour: 2.0 or less
Heavy metals: 5 PPM or less
Than the absorption coefficient (285 nm): p. 460
Than the absorption coefficient (325 nm): p. 290
application
Is A broad-spectrum UV absorber, absorption with high efficiency, non-toxic side effects, no teratogenicity, optical, thermal stability is good wait for an advantage, it also can absorb uv-a and UV - B, is approved by the FDA â… kind of sunscreen, use frequency is higher in the United States and Europe, widely used in sun lotion, cream, honey, latex, oil and other sunscreen cosmetics.
Can be used for other water-soluble ink, paint, etc for uv absorber.
As anti-ultraviolet finishing agent for cotton fabric, polyester fiber has good anti aging and softening effect.
process
Benzyl dimethyl ether synthesis: 350 kg of water added to the reaction kettle, add 150 kg NaOH under stirring.Dissolved after cooling to 10 ℃, add 110 kg of resorcinol, stir to dissolve.Then add the 126 kg dimethyl sulfate, reaction 2 h under 26 ~ 30 ℃.Water, reservoir, the reservoir water washing to neutral.To remove low point, Buddha distillation fraction collected 215 ~ 220 ℃, is between benzene dimethyl ether.
2 - hydroxy - 4 - methoxy diphenyl ketone synthesis: first of all to add 300 kg chlorobenzene condensation kettle, adding catalyst AlCl3 under stirring, 350 kg, isophthalic ether 120 kg.Heated to 80 ℃ or so, slowly add benzoyl chloride 320 kg.Reflow 4 ~ 6 h, cooling, hydrolysis, evaporate the solvent, cooling, crystallization, drying, 2 - hydroxy - 4 - methoxy diphenyl ketone.
2 - hydroxy - 4 - methoxy - 5 - sulphonic acid base of synthesis of diphenyl ketone: first of all to add 93% of sulfuric acid, sulfonated [http://www.guidechem.com/cas-50/50-89-5.html] kettle under stirring slowly add 2 - hydroxy - 4 - methoxy diphenyl ketone, at about 110 ℃ 4 ~ 6 h reaction, cooling, crystallization, dry, recrystallization is the finished product.
Ok.Let's end here. I will pull out more about chemical raw materials later.Thanks!
English name: 2 - Hydroxy - 4 - Methoxybenzophenone - 5 - Sulfonic Acid
Alias: UV absorber UV - 284, diphenyl ketone - 4, sunscreen, BP - 4 3
CASNo.: 4065-45-6
EINECS no.: 223-772-2
Molecular formula: C14H12O6S
Molecular weight: 308.31
The physical and chemical indicators
Appearance: this product is a pale yellow crystal.
Melting point: 170 ° C
Solubility: soluble in water
Content: 99% or higher
Dry weight loss: 5% or less
PH: 1.2 to 2.2
Aqueous solution turbidity: 2.0 EBC or less
Colour: 2.0 or less
Heavy metals: 5 PPM or less
Than the absorption coefficient (285 nm): p. 460
Than the absorption coefficient (325 nm): p. 290
application
Is A broad-spectrum UV absorber, absorption with high efficiency, non-toxic side effects, no teratogenicity, optical, thermal stability is good wait for an advantage, it also can absorb uv-a and UV - B, is approved by the FDA â… kind of sunscreen, use frequency is higher in the United States and Europe, widely used in sun lotion, cream, honey, latex, oil and other sunscreen cosmetics.
Can be used for other water-soluble ink, paint, etc for uv absorber.
As anti-ultraviolet finishing agent for cotton fabric, polyester fiber has good anti aging and softening effect.
process
Benzyl dimethyl ether synthesis: 350 kg of water added to the reaction kettle, add 150 kg NaOH under stirring.Dissolved after cooling to 10 ℃, add 110 kg of resorcinol, stir to dissolve.Then add the 126 kg dimethyl sulfate, reaction 2 h under 26 ~ 30 ℃.Water, reservoir, the reservoir water washing to neutral.To remove low point, Buddha distillation fraction collected 215 ~ 220 ℃, is between benzene dimethyl ether.
2 - hydroxy - 4 - methoxy diphenyl ketone synthesis: first of all to add 300 kg chlorobenzene condensation kettle, adding catalyst AlCl3 under stirring, 350 kg, isophthalic ether 120 kg.Heated to 80 ℃ or so, slowly add benzoyl chloride 320 kg.Reflow 4 ~ 6 h, cooling, hydrolysis, evaporate the solvent, cooling, crystallization, drying, 2 - hydroxy - 4 - methoxy diphenyl ketone.
2 - hydroxy - 4 - methoxy - 5 - sulphonic acid base of synthesis of diphenyl ketone: first of all to add 93% of sulfuric acid, sulfonated [http://www.guidechem.com/cas-50/50-89-5.html] kettle under stirring slowly add 2 - hydroxy - 4 - methoxy diphenyl ketone, at about 110 ℃ 4 ~ 6 h reaction, cooling, crystallization, dry, recrystallization is the finished product.
Ok.Let's end here. I will pull out more about chemical raw materials later.Thanks!