RICHARD DAVID HILL, III
Pilots at Homewood Ln, Lakeland, FL
License number
Florida A4704985
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
4407 Homewood Ln, Lakeland, FL 33811
Professional information
Teritory Sales Manager At Builders Hardware,Inc
Position:
TERITORY SALES MANAGER at BUILDERS HARDWARE,INC
Location:
Lakeland, Florida Area
Industry:
Building Materials
Work:
BUILDERS HARDWARE,INC
-
TERITORY SALES MANAGER
Production Of Stabilized Wet Process Phosphoric Acid
US Patent:
4248846, Feb 3, 1981
Filed:
Jul 3, 1979
Appl. No.:
6/054446
Inventors:
Richard N. Hill - Lakeland FL
Assignee:
W. R. Grace & Co. - New York NY
International Classification:
C01B 2516
US Classification:
423317
Abstract:
This invention is directed to improvements in making wet process phosphoric acid substantially free from post-precipitation. The improvements include recycling to the reaction train a side stream produced by the process; cooling one or more of the streams of the process; and/or addition of sulfuric acid to an evaporator.
Production Of Stabilized Wet Process Phosphoric Acid
US Patent:
4110422, Aug 29, 1978
Filed:
Jul 1, 1977
Appl. No.:
5/812319
Inventors:
Richard N. Hill - Lakeland FL
Assignee:
W. R. Grace & Co. - New York NY
International Classification:
C01B 2516
US Classification:
423317
Abstract:
Treatment of wet process phosphoric acid to inhibit post-precipitation by steps including addition of an aluminum silicate material such as perlite or the like to dilute acid from which a major portion of solids has been removed, concentration of the resulting dilute acid, and removal of resulting precipitate.
Production Of Stabilized Wet Process Phosphoric Acid
US Patent:
4164550, Aug 14, 1979
Filed:
Mar 6, 1978
Appl. No.:
5/883381
Inventors:
Richard N. Hill - Lakeland FL
Assignee:
W. R. Grace & Co. - New York NY
International Classification:
C01B 2516
US Classification:
423321R
Abstract:
Treatment of wet process phosphoric acid to inhibit post-precipitation by steps including addition of an aluminum silicate material such as perlite or the like to dilute acid from which a major portion of solids has been removed, concentration of the resulting dilute acid, and removal of resulting precipitate.
Post Precipitation Control Of Low-Iron Phosphoric Acid, Without Perlite
US Patent:
4364912, Dec 21, 1982
Filed:
Jul 20, 1981
Appl. No.:
6/284623
Inventors:
Richard N. Hill - Lakeland FL
Assignee:
W. R. Grace & Co. - New York NY
International Classification:
C01B 2516
US Classification:
423321R
Abstract:
The Hill process for control of post-precipitation in wet process phosphoric acid can be made to work on low-iron phosphate rock, without the need of added perlite or other aluminum silicate.
Reduction Of Magnesium And Other Cations In Phosphoric Acid
US Patent:
4242198, Dec 30, 1980
Filed:
Mar 12, 1979
Appl. No.:
6/019976
Inventors:
Richard N. Hill - Lakeland FL
Assignee:
W. R. Grace & Co. - New York NY
International Classification:
B01D 1504
US Classification:
423321R
Abstract:
Improvement in the reduction of Mg, Ca, Na, K and Al in crude phosphoric acid using an ion exchange resin bed, comprising preclarifying the feed acid with flocculant polymer and placing a filter aid precoat on the resin bed. As part of the preclarification process, a compatible soluble sodium compound, such as sodium carbonate, is added to the feed acid to speed the flocculation process.
Re-Post Precipitation Control
US Patent:
4250154, Feb 10, 1981
Filed:
Oct 22, 1979
Appl. No.:
6/086640
Inventors:
Richard N. Hill - Lakeland FL
Assignee:
W. R. Grace & Co. - New York NY
International Classification:
C01B 2516
US Classification:
423317
Abstract:
Prevention of re-post precipitation in concentrated wet process phosphoric acid by heating the acid at 55. degree. to 85. degree. C. thereby to dissolve solids without substantial re-post precipitation.
Phosphoric Acid Crystallizer Underflow Return
US Patent:
4293311, Oct 6, 1981
Filed:
Jan 10, 1980
Appl. No.:
6/110805
Inventors:
Richard N. Hill - Lakeland FL
Assignee:
W. R. Grace & Co. - New York NY
International Classification:
B01D 902, C01B 25234
US Classification:
23301
Abstract:
In the Hill phosphoric acid process the crystallizer underflow is divided into a major stream and a minor stream. The major stream goes to the clarifier and the minor stream to the aluminum silicate addition vessel.
Stabilized Wet Process Phosphoric Acid
US Patent:
4305915, Dec 15, 1981
Filed:
Jul 3, 1979
Appl. No.:
6/054449
Inventors:
Richard N. Hill - Lakeland FL
Assignee:
W. R. Grace & Co. - New York NY
International Classification:
C01B 2516
US Classification:
423321R
Abstract:
Wet-process phosphoric acid products substantially free of post precipitation.
Settling Clarifier
US Patent:
4222879, Sep 16, 1980
Filed:
Mar 12, 1979
Appl. No.:
6/019870
Inventors:
Richard N. Hill - Lakeland FL
Assignee:
W. R. Grace & Co. - New York NY
International Classification:
B01D 2118
US Classification:
210520
Abstract:
Settling clarifier for liquids carrying suspended solids, having a two-slope bottom section, with central stilling well for feed, rake system, clear overflow exit means, and sludge underflow means.