Presentation is loading. Please wait.

Presentation is loading. Please wait.

SALUTATION. PREPARATION OF UREA-FORMALDEHYDE RESIN.

Similar presentations


Presentation on theme: "SALUTATION. PREPARATION OF UREA-FORMALDEHYDE RESIN."— Presentation transcript:

1 SALUTATION

2 PREPARATION OF UREA-FORMALDEHYDE RESIN

3

4

5 AIMS OF THE PRESENT INVESTIGATION

6 Raw materials: Urea, Formaldehyde (37-40%). 135cm 3 37-40% HCHO Adjusting pH in 7.5-8.0 of the solution 50 g Urea added to the solution pH adjusted to 3.5-5.0 with acetic acid Aliquots solution appeared pH of the solution adjusted to 7.5-8.0 Precipitation occurred gradually Syrup like solution obtained Colorless U- F resin 2-5 cm 3 NaOH stirring Heating for 15 mins reflux Add 1 M NaOH Vacuum distillation Keep 12 hr

7

8

9

10

11

12

13

14

15

16


Download ppt "SALUTATION. PREPARATION OF UREA-FORMALDEHYDE RESIN."

Similar presentations


Ads by Google