Recently, “one kind of 5A molecular sieve adsorbent and its preparation” written by SCC Nanjing Branch was granted the invention patent in Italy. The preparation of 5A molecular sieve adsorbent has been a sign of SCC Nanjing Branch. In recent years, SCC Nanjing Branch has carried out a large number of independent innovations and researches on the preparation of 5A molecular sieve adsorbent, which has been applied in industrial production and brought significant economic and social benefits as well.