公开(公告)号：GB1022667A

公开(公告)日：1966-03-16

申请号：GB2383163

申请日：1963-06-14

Applicant: SCHAEFER WILHELM ,  KATHE SCHAEFER ,  HANS VON ZANDER

Inventor： FRIEDRICH ERICH

IPC: C09C1/40

Abstract: A material comprising calcium carbonate is produced by adding carbon dioxide to the precipitation mixture produced by treating milk of lime with aluminium sulphate. The carbon dioxide is preferably added until the pH of the slurry is 8-9 and a mixture of air and carbon dioxide may be utilized in the reaction. If desired, the milk of lime may first be partially carbonated, the aluminium sulphate added and finally further carbon dioxide passed into the reaction mixture until the desired alkaline reaction is achieved. The product is used as a white pigment and is described as a satin white carbonate.

公开(公告)号：DE1926687U

公开(公告)日：1965-11-04

申请号：DESC038678

申请日：1965-08-04

Applicant: SCHAEFER WILHELM

Inventor： SCHAEFER WILHELM

公开(公告)号：DE1901645U

公开(公告)日：1964-10-01

申请号：DESC035876

申请日：1964-04-28

Applicant: SCHAEFER WILHELM

Inventor： SCHAEFER WILHELM

公开(公告)号：DE1854817U

公开(公告)日：1962-07-12

申请号：DESC031161

申请日：1962-01-30

Applicant: SCHAEFER WILHELM

Inventor： SCHAEFER WILHELM

公开(公告)号：DE941835C

公开(公告)日：1956-04-19

申请号：DESC009533

申请日：1952-05-16

Applicant: SCHAEFER WILHELM

Inventor： SCHAEFER WILHELM

IPC: E05C5/04

公开(公告)号：DE939431C

公开(公告)日：1956-02-23

申请号：DESC011386

申请日：1952-12-28

Applicant: SCHAEFER WILHELM

Inventor： SCHAEFER WILHELM

IPC: E06B3/52

公开(公告)号：DE1711715U

公开(公告)日：1955-11-24

申请号：DESC010535

申请日：1953-11-03

Applicant: SCHAEFER WILHELM

Inventor： SCHAEFER WILHELM

公开(公告)号：DE1689669U

公开(公告)日：1954-12-23

申请号：DESC012655

申请日：1954-07-09

Applicant: SCHAEFER WILHELM

Inventor： SCHAEFER WILHELM

公开(公告)号：GB695107A

公开(公告)日：1953-08-05

申请号：GB1595449

申请日：1949-06-15

Applicant: WESTFALIA DINNENDAHL GROEPPEL ,  SCHAEFER WILHELM

IPC: B03D1/16

Abstract: 695,107. Froth flotation. WESTFALIA DINNENDAHL GROPPEL AKT.-GES., and SCHAFER, W. June 15, 1949, No. 15954/49. Class 82(ii) A froth flotation apparatus consists of several agitating cells in series, and is especially suitable for preparing fine coal (1-10 m.m.) by a process consisting of floating the fine coal in a series of suspensions, the densities of which lie between 0.05 and 0.3 below the specific gravity of the clean coal. Each cell of the series may have a suspension of progressively higher density than that preceding it. The apparatus has cells A each containing an agitator B sucking air through a tube surrounding the agitator shaft, the agitator being closed towards the top except for the air supply to the tube. The bottoms of the cells form a trough beneath the agitators, a screw conveyer C working therein to transport the refuse. Adjacent cells are connected by slits to equalize the pulp levels in the cells and by slits D to allow the passage of pulp. The froth from each cell may be removed by a scraping chain. The last cell in the series may have a bucket elevator G to remove the refuse fed thereto by the screw conveyer. Flotation media are supplied through openings J.

公开(公告)号：DE1655055U

公开(公告)日：1953-05-07

申请号：DESC008544

申请日：1953-03-02

Applicant: SCHAEFER WILHELM

Inventor： SCHAEFER WILHELM