ChemicalBook CAS DataBase List 1,3,7-Naphthalenetrisulfonic acid

1,3,7-Naphthalenetrisulfonic acid synthesis

5synthesis methods

Product Name:1,3,7-Naphthalenetrisulfonic acid
CAS Number:85-49-4
Molecular formula:C10H8O9S3
Molecular Weight:368.36

91-20-3 Synthesis

91-20-3
490 suppliers
$15.50/250mg

6654-64-4
102 suppliers
$19.00/250mg

86-66-8
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inquiry

85-49-4
1 suppliers
inquiry

Yield:86-66-8 80% ，85-49-4 13% ，6654-64-4 6%

Reaction Conditions:

with sulfuric acid;sulfur trioxide at 65 - 150;

Steps:

Sulfonation treatment: the liquid naphthalene and concentration of 100% sulfuric acid solution was continuously added to the kettle sulfonated, sulfonated kettle temperature rose to 90 , for the first time sulfonated, after the first sulfonated products were continuously fed to the buffer tank indexable sulfonated column, the column transposition sulfonated temperature rose to 150 , conducted transfer reaction;The complete material transfer reaction mass concentration of 100% sulfuric acid solution and the mass concentration of 65% oleum sulfonation continuously fed to the reactor, the reactor temperature sulfonation was 65 , second sulfonated;And materials will be sent to the concentration after the second sulfonated completed 65% oleum sulfonated three towers, three towers sulfonation the temperature rose to 150 , a third sulfonated, sulfonated generation, sulfonated sulfonated and into the buffer storage tank.Sulfonated as nitrification spare

References:

CN105669500,2016,A Location in patent:Paragraph 0058; 0059; 0060; 0061; 0062

120-18-3 Synthesis