| 摘要 |
1,142,691. Lead oxide. NATIONAL LEAD CO. 15 Feb., 1966 [10 May, 1965], No. 6668/66. Addition to 1,069,430. Heading C1A. In a process as described in Specification 1,069,430 (Heading C1A) litharge having a metallic content of 18-24À5% by weight is produced in the Barton type pot by vigorously agitating the pot contents by revolving the stirrer at 150-225 r.p.m., with a rate of feed of molten lead of 1800-2200 pounds per hour, at a temperature of 660-725‹ F. Reference has been directed by the Comptroller to Specification 966,925. |
