Method for preparing amphiprotic tanning agents in aryl-sulfone type
A preparation method for bisexual tanning agent takes 4,4' dihydroxy sulfobenzide, phenol sulfuric acid and methanol as the raw material to prepare a methanol condensate, takes diethanolamine and methanol as the raw material to prepare 3-ethoxyl oxazolidine, then to condensate the methanol cond...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A preparation method for bisexual tanning agent takes 4,4' dihydroxy sulfobenzide, phenol sulfuric acid and methanol as the raw material to prepare a methanol condensate, takes diethanolamine and methanol as the raw material to prepare 3-ethoxyl oxazolidine, then to condensate the methanol condensate and 3-ethoxyl oxazolidine to prepare a bisexual tanning agent. |
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