A developing agent,3-Methyl-4-amino-N-ethyl-N-(2-hydroxyethyl)-aniline sulfate(CD-4),was synthesized;its synthesis process was studied.The results showed that the optimum process conditions were Pt/C as catalyst,methanol as solvent,temperature 60℃,pressure 0.8～1.5 MPa.In the conditions,the conversion rate of hydrogenation was 100%.When the neutraliza-tion degree of sulfuric acid was 105%,the yield of crude product was 76%.Using 1%of activated carbon,water(33%)/ethanol(67%)as recrystallization solvent to refine the product,the target product with qualified color could be prepared.
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