反应详情

According to batch size, gel composition and contents of sodium silicate, sodium aluminate solution is prepared. This is added at a controlled rate and at ambient temperature to sodium silicate solution taken previously in a stainless steel reactor. Slurry of reaction mixture is allowed to crystallize at temperature 70-100° C. for 1 to 5 hours until Zeolite-A formation takes place. Zeolite-A slurry is filtered and washed till filtrate pH was ˜11 to 10.5. Wet cake thus obtained is dried in a dryer and dry powder was pulverized and subjected to analysis. The comparison of the properties of detergent builder Zeolite-A produced according to present invention (Example 10) and SASIL (Degussa-Henkel) is given in Table 1.

1. customis prepared
2. customtaken previously in a stainless steel reactor
3. customSlurry of reaction mixture
4. customto crystallize at temperature 70-100° C. for 1 to 5 hours until Zeolite-A formation
5. filtrationZeolite-A slurry is filtered
6. washwashed till filtrate pH was ˜11 to 10.5
7. customWet cake thus obtained
8. customis dried in a dryer
9. customdry powder