Edgar W Sawyer

US Patent:

41168259, Sep 26, 1978

Filed:

Jun 13, 1977

Appl. No.:

5/806201

Inventors:

Edgar W. Sawyer - Hagerstown MD

Assignee:

International Telephone and Telegraph Corp. - Nutley NJ

International Classification:

C02B 114

US Classification:

210 27

Abstract:

Treating water with various grades of attapulgite clay and sepiolite using contacting or percolation techniques removes substances not removable by standard water purification methods under many conditions. Substances such as pesticides, toxins, hormones, heavy metal cations and viruses are removed from water by adsorption upon the clay surface. When contacting is employed, the clay containing the adsorbed substances is subsequently removed by sedimentation or filtration. The clays can be regenerated by appropriate chemical or thermal techniques.

US Patent:

40626946, Dec 13, 1977

Filed:

Nov 29, 1976

Appl. No.:

5/745746

Inventors:

Edgar W. Sawyer - Hagerstown MD

Assignee:

International Telephone and Telegraph Corporation - Nutley NJ

International Classification:

C09C 300

US Classification:

106309

Abstract:

Methods and apparatus are disclosed for providing homogeneous liquid suspensions of materials that are not readily wet by the liquid. Sulfonate based dispersants in combination with a gelling grade clay mineral provide stable and homogeneous suspensions of materials such as sulfur and coal dust in water. When attapulgite clay is used as a suspending agent for coal dust in flammable liquid hydrocarbons the fly ash combination by-products remain similarly suspended in the effluent flue gases to facilitate the removal of the fly ash within the flue assembly.

US Patent:

41168283, Sep 26, 1978

Filed:

Jun 13, 1977

Appl. No.:

5/806251

Inventors:

Edgar W. Sawyer - Hagerstown MD

Assignee:

International Telephone and Telegraph Corp. - Nutley NJ

International Classification:

C02B 114

US Classification:

210 27

Abstract:

Treating water with various grades of attapulgite clay and sepiolite using contacting or percolation techniques removes substances not removable by standard water purification methods under many conditions. Substances such as pesticides, toxins, hormones, heavy metal cations and viruses are removed from water by adsorption upon the clay surface. When contacting is employed, the clay containing the adsorbed substances is subsequently removed by sedimentation or filtration. The clays can be regenerated by appropriate chemical or thermal techniques.

US Patent:

43187323, Mar 9, 1982

Filed:

Feb 4, 1980

Appl. No.:

6/118358

Inventors:

Edgar W. Sawyer - Hagerstown MD

Assignee:

International Telephone and Telegraph Corporation - New York NY

International Classification:

C09K 704
C05G 300

US Classification:

71 648

Abstract:

Unslaked lime, calcium oxide (CaO) or calcium magnesium oxide, CaO. MgO is post added to a ground, colloidal clay product to obtain a resultant product which exhibits greater stability and yield factors than currently available products. The resultant product exhibits a more uniform viscosity-imparting characteristic to a solution to which it is added, while providing greater stability and hence, longer shelf life.

US Patent:

44228554, Dec 27, 1983

Filed:

May 15, 1981

Appl. No.:

6/263808

Inventors:

Edgar W. Sawyer - Hagerstown MD

Assignee:

International Telephone and Telegraph Corporation - New York NY

International Classification:

C10L 132
B01J 1300

US Classification:

44 51

Abstract:

Normally nongelling montmorillonite clay is treated to have gelling characteristics by drying the clay to 10 to 15 percent free moisture and grinding the clay to at least 100 percent finer than 45 microns. To thicken an aqueous solution, the clay is dispersed in water with a chemical dispersant and the predispersion is agitated in the aqueous liquid with a flocculent. To thicken an organic liquid, the dried and ground clay is stirred into the liquid with a surfactant.

US Patent:

41168275, Sep 26, 1978

Filed:

Jun 13, 1977

Appl. No.:

5/806250

Inventors:

Edgar W. Sawyer - Hagerstown MD

Assignee:

International Telephone and Telegraph Corp. - Nutley NJ

International Classification:

C02B 114

US Classification:

210 27

Abstract:

Treating water with various grades of attapulgite clay and sepiolite using contacting or percolation techniques removes substances not removable by standard water purification methods under may conditions. Substances such as pesticides, toxins, hormones, heavy metal cations and viruses are removed from water by adsorption upon the clay surface. When contacting is employed, the clay containing the adsorbed substances is subsequently removed by sedimentation or filtration. The clays can be regenerated by appropriate chemical or thermal techniques.

US Patent:

42038642, May 20, 1980

Filed:

Dec 30, 1977

Appl. No.:

5/866094

Inventors:

Edgar W. Sawyer - Hagerstown MD

Assignee:

International Telephone and Telegraph Corporation - New York NY

International Classification:

B01J 1300

US Classification:

252314

Abstract:

Dispersions with lowered freezing points are provided by dissolving a dispersing agent in water, adding urea, adding a particulate inorganic solid, and then adding alcohol as a freezing point depressant. Dispersions formed in this manner can contain 20 to 75% inorganic solids in suspension without flocculating in the presence of the alcohol. Alternatively, the dispersant can be dissolved in an aqueous urea solution and the fine, particulate inorganic solid can be dispersed in the solution after which the alcohol may be added. These compositions exhibit depressed freezing points and can still be transported as a liquid at lower temperatures.

US Patent:

42512301, Feb 17, 1981

Filed:

Oct 26, 1978

Appl. No.:

5/955065

Inventors:

Edgar W. Sawyer - Hagerstown MD

Assignee:

International Telephone and Telegraph Corporation - New York NY

International Classification:

C10L 132

US Classification:

44 51

Abstract:

Suspensions of coal dust powder in fuel oil are stabilized against sedimentation by an additive that makes them viscous under conditions of low shear in order to keep the coal in suspension under static conditions while exhibiting relatively low viscosity under high shear conditions to facilitate pumping through long range pipelines by the combination of a suitable surfactant with a gelling grade clay suspending agent.