NICHOLAS JOSEPH GRECO
Medical Practice in Pittsburgh, PA

4215229, Jul 29, 1980

Jun 15, 1978

5/915715

Nicholas P. Greco - Pittsburgh PA

Koppers Company, Inc. - Pittsburgh PA

C07C 3720

568804

Ortho- and para-monoalkylated phenols and 2,4- and 2,6-dialkylphenols can be produced from phenolic compounds in good yields. The phenolic compound is reacted with an aldehyde having one to ten carbon atoms and a secondary aliphatic amine having a basic dissociation constant, pK. sub. b, of less than about 3. 6 measured at 25. degree. C. The reaction is conducted in the liquid phase with at least a stoichiometric amount of the phenolic compound, the aldehyde and the secondary amine, or with an excess of the phenolic compound with the stoichiometric amounts of the aldehyde and the secondary amine. The reaction is conducted at a temperature in the range of around 0. degree. C. to about 25. degree. C. , and the reaction produces an aminoalkylated phenol. The aminoalkylated phenol is contacted with hydrogen in the presence of a metal catalyst at a temperature of about 120. degree. C.

3960969, Jun 1, 1976

Feb 7, 1975

5/547860

Nicholas P. Greco - Pittsburgh PA
David A. Webb - Valencia PA

Koppers Company, Inc. - Pittsburgh PA

C07C 3906, C07C 3728

260627H

An improved creosote wood preservative that has a light color and that forms a non-sticky crud deposit is prepared from a coal tar creosote. The coal tar creosote is distilled to an end temperature in the range of 395. degree. to 410. degree. C. at atmospheric pressure. This distillation produces a distillate and a pitch residue. The distillate is contacted with at least 1% by weight of one or more of the following caustic compounds: alkali metal alcoholates of alkali metal hydroxides to produce the improved creosote wood preservative. The pitch residue from distillation is recovered and it is utilized in the production of various pitch products or in combustion for its fuel value.

4399310, Aug 16, 1983

Sep 18, 1981

6/303541

Nicholas P. Greco - Pittsburgh PA

Koppers Company, Inc. - Pittsburgh PA

C07C 4545

568346

A process is disclosed for making 1,3-cyclic diones by vapor-phase cyclization of delta-keto carboxylic acid esters over a carbon catalyst bed. The delta-keto ester is conveyed through the catalyst bed by a carrier gas characterized by being liquid at 25. degree. C. and having a sufficiently high boiling point that the carrier gas is easily condensable under ambient conditions. The delta-keto ester is highly soluble in the liquid carrier, while the cyclic dione product of the ester has very low solubility in the liquid carrier. Use of the described carrier in vapor-phase cyclization of delta-keto esters allows efficient separation of cyclic dione product and unreacted starting material from the carrier after the cyclization reaction.

4275246, Jun 23, 1981

Jul 2, 1979

6/053968

Nicholas P. Greco - Pittsburgh PA

Koppers Company, Inc. - Pittsburgh PA

C07C 3768, C07C 3770

568750

Effluent containing cresols such as are contained in Lurgi tar acids are separated by preferentially treating the cresols with an aqueous alkali metal carbonate or bicarbonate at elevated temperature for a time sufficient to form the alkali metal salt of at least part of the cresols, but not so long as to form any appreciable alkali metal salt of 2,6-xylenol or o-ethylphenol. The water soluble alkali metal salts of cresols are then separated from the water insoluble phenols and said salts acidified to "spring" the cresols and the water insoluble cresols separated from the aqueous solution.

3973971, Aug 10, 1976

Feb 7, 1975

5/547859

Nicholas P. Greco - Pittsburgh PA
David A. Webb - Valencia PA

Koppers Company, Inc. - Pittsburgh PA

C07C 3736, C09D 1500

106 15R

An improved creosote wood preservative that has a light color and that forms a non-sticky crud deposit is prepared from a coal tar creosote. The coal tar creosote is reacted with one or more of the following groups of neutral compounds: paraformaldehyde, trioxane; or nitrobenzene, nitrotoluene, nitroxylene, tris (hydroxymethyl) nitromethane; or aluminum, zinc or sulfur, to produce a reacted creosote. This reacted creosote is distilled to yield a distillate, which is the improved creosote wood preservative, and a pitch residue.

3953509, Apr 27, 1976

Mar 4, 1974

5/447848

Nicholas P. Greco - Pittsburgh PA

Koppers Company, Inc. - Pittsburgh PA

C07C 8510

260580

A catalyst for use in preparing p-aminophenol by catalytic hydrogenation of nitrobenzene in an acidic solution. The catalyst is either powdered molybdenum sulfide-on-carbon or powdered platinum sulfide-on-carbon.

4769230, Sep 6, 1988

Aug 2, 1982

6/404614

Nicholas P. Greco - Pittsburgh PA
Byung K. Ahn - Pittsburgh PA
John J. Kozak - Wexford PA

Koppers Company, Inc. - Pittsburgh PA

C01G 2800

423617

Arsenic acid is formed from arsenous acid and water under oxygen pressure with catalytic amounts of nitric acid and a halide whereby the nitric oxide by-product is regenerated to nitric acid for contact with fresh arsenous acid.