Naphthalene Superplasticizer Production Steps

 Naphthalene Superplasticizer Step1. put naphthalene into the reaction kettle , heated to melt.
 Naphthalene Superplasticizer Step​2. When the temperature rose to 155oC , then add sulfuric acid ( 2 . 5 hours ), after adding the acid
                                                            temperature keep 1 hour in 160 ~ 165oC ; The total acidity of iodo is 31 ~ 32 % commonly , after the
                                                           sulfonated sampling determination of total acidity.
 Naphthalene Superplasticizer Step​ 3. Make the material temperature down to about 120 , hydrolysis with water half an hour
 Naphthalene Superplasticizer Step​ 4. Determine the total acidity material after hydrolysis,With water or acid method to adjust the total acidity of
                                                             raw materials to 28 or 29%.
 Naphthalene Superplasticizer Step​ 5. Continue to cooled to about 105 ~ 108oC, Add formaldehyde to 2 . 5 hours,After adding the formaldehyde
                                                             heating to 105 ~ 110oC , response 4 hours.
 Naphthalene Superplasticizer Step​ 6. The reaction mass was placed in a neutralization pail,And neutralized to pH 7-9 with NaOH.