Abstract: 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.
August 2, 1982
Date of Patent:
September 6, 1988
Koppers Company, Inc.
Nicholas P. Greco, Byung K. Ahn, John J. Kozak
Abstract: Wooden beams containing concealed load distribution means embedded therein are disclosed herein. The wooden beams may be either laminated or unitary. The load distribution means is comprised of an elongated member suitably adapted such that loads exerted on the elongated member are therefrom transmitted to and more evenly distributed within the wooden beam.
Abstract: A railroad crossing is provided in which gage, transverse end, and outer field panels are joined by means of splines fitted into indentations on side surfaces of the panels whereby pairs of panels are joined together with a spline fitting partly into each side or end of adjoining panels; and lateral anchor members for fixing the panels adjacent to said rails, the end panels and the outer field panels whereby the need is obviated for affixing the panels to the ties by means of surface spikes.
Abstract: Alkylresorcinol phosphites useful as antioxidants in lubricants and greases are provided of the formula: ##STR1## wherein R is selected from H and alkyl, and R.sup.1 is an alkyl, said alkyl having from 8 to 18 carbon atoms and consisting of at least 75% secondary alkyl.
Abstract: A gaff is provided for use in climbing a wooden utility pole (to include trees), said gaff having one or more grooves preferably running along a line parallel to the line formed by the intersection of the planes of its top two sides and/or one or more teeth for cutting into the pole.
Abstract: Articles and a method are disclosed useful for providing a lift insert for a cast concrete product, such as a cast concrete slab or panel. The articles include a threadless plug for temporary insertion into an insert for receiving a lifting device in a cast concrete product, an insertion tool therefor, and the insert assembly. The threadless plug is characterized by an elastomeric tubular member having closure and/or abutment means on each end and dimensioned such that, in its operative position in the lift insert, such as a coil insert, the portion of the tubular member between the ends is placed in tension to positively seal against ingress of concrete into the top of the coil or insert and between the void plug and the coil during casting.
Abstract: A ternary alloy comprised of cerium, nickel and manganese is characterized in having CaCu.sub.5 hexagonal crystal structure and stoichiometry. Members of a preferred class of compounds, represented by the empirical formula CeNi.sub.5-x Mn.sub.x wherein "x" has a value between 0.1 and about 1.0. These alloys react with hydrogen readily and can absorb a large amount of hydrogen at moderate pressure and temperature and are particularly suitable for use as hydrogen storage materials.
Abstract: A novel composition for treating asphalt and concrete surfaces is provided formed of a mixture of topped coke oven tar, an aromatic solvent having an API Gravity@ 60.degree. F. of 11-30, Specific Gravity 60.degree./60.degree. F. of from 0.876-0.993, Distillation Range .degree. F. of 310-450 IBP (initial boiling point) to 350-550 DP (dry point), and a Flash pt. .degree. F. TCC of 110-250; and a bituminous pavement rejuvenator which is a composition derived from coal tar and comprises a mixture of di-, tri- and tetracyclic aromatic compounds and their alkyl homologs containing lower alkyl groups together with a significant amount of phenolic and hydroxy derivatives and having a specific gravity at 25.degree./25.degree. C. of at least 1.08, an initial boiling point of at least 180.degree. C., and a continuous boiling range to at least 300.degree. C., 70-40% by volume of the material remaining as residue at 300.degree. C., and the distillate to 300.degree. C. having a minimum specific gravity at 25.degree./25.
Abstract: Hydrogen storage materials are provided by a quaternary alloy of the formula:Zr.sub.1-x Ti.sub.x CrFe.sub.ywherein x has a value in a range from 0.1 to 0.3, and y has a value in a range from 1.2 to 1.4, and their hydrides.
Abstract: A group of phenolic phosphite compounds having the formula ##STR1## wherein R and R' may be the same or different and are tertiary alkyl groups containing from 4 to 12 carbon atoms. These compounds are disclosed to be useful as stabilizers and antioxidants in various organic materials.
Abstract: A method of protecting organic materials from fungi and/or bacteria is provided which comprises applying to said organic material a minor but effective biocidal amount of a compound of the formula: ##STR1## wherein M is selected from H,P and an alkali metal or alkali earth metal and n is an integer selected from 1 to 3.
Abstract: 1,4-dihydroxy, 5,8-dihydronaphthalene and related compounds are provided from benzoquinone, and 1,3-butadiene which may be substituted with halogen, acyl, and alkyl, in a one step reaction in the presence of a ferric salt catalyst.
Abstract: 2,6-dialkyl substituted phenols such as 2,6-ditertiary butylphenol are reacted with formaldehyde in methyl alcohol in the presence of an inert gas and a tertiary amine catalyst to produce a bis(3,5-di-t-butyl-4-hydroxybenzyl)ether; and the bis ether subjected to hydrogenolysis in the presence of a catalyst, a solvent and an amine to prepare a trisubstituted phenol such as 2,6-di-t-butyl-4-methyl-phenol.
Abstract: An improved method for screening and fractionation. By using a housing interiorly divided by a screen plate into a primary and a secondary chamber with the secondary chamber further divided by a fluid impermeable wall, a process fluid stream containing particulate material has a second and a third process fluid stream diverted from it. The second stream is outputed from the housing while the third stream is recirculated to the first chamber. It is demonstrated that high screening or fractionation efficiency is obtained by this method.
Abstract: A phenol-resorcinol-formaldehyde resin and a method for making the same. In this method phenol and formaldehyde at an initial pH of 8.5 to 9.2 are reacted in the presence of a sodium sulfite catalyst. The reaction mixture is heated and refluxed until it has a viscosity of u-v on the Gardner bubble test. Additional resorcinol is added to the mixture and refluxing is continued until it has a viscosity of 30 to 100 Garner sections. The reaction mixture is diluted with a water miscible solvent to obtain a resin solution having a solids content of about 40 to 60 percent by weight and a viscosity of 2.0 to 3.5 poise. An alkali metal carbonate material in the amount of 4 to 8 percent by weight of the resin is added to make adhesives including this resin fast curing. Fumed silica is also added to the resin solution by means of high shear apparatus to make the solution thixotropic.
Abstract: Synthetic base oils for functional fluids and greases are provided comprising a mixture of monoalkylated naphthalenes and polyalkylated naphthalenes, said naphthalenes represented by the formula: ##STR1## wherein the R' groups are independently selected from H and methyl, the monoalkylated naphthalenes have three R groups which are H and one R group which is a 12-26 carbon alkyl, the polyalkylated naphthalenes have from two to four R groups which are 12-26 carbon alkyl and any remainder R groups H, and the weight ratio of monoalkylated naphthalenes to polyalkylated naphthalenes is from 5:95 to 70:30 when the average alkyl group is C.sub.12 -C.sub.16 and from 5:95 to 99:1 when the average alkyl group is C.sub.17 -C.sub.26. In the preferred mixture, the polyalkylated naphthalenes have a numerical ratio of .alpha./.beta. substitution of from 50/50 to 10/90 when the R' groups are both H.
Abstract: A process is disclosed for one-step preparation of substituted tetrathiafulvalenes by reaction of carbon disulfide with acetylenic compounds under pressures of at least about 1,000 atmospheres. Substituted tetrathiafulvalenes made by this process are particularly useful as precursors to very pure tetrathiafulvalene, a compound which can complex with tetracyano-p-quinodimethane to form a charge-transfer salt having very high electrical conductivity.
Abstract: A method and apparatus for manufacturing the screw flight section of a screw conveyor is disclosed. The apparatus includes two horizontal arms which extend from a vertical support and at the terminal end of these arms there are dies for engaging the inner and outer peripheral edges of a flat, sheet metal, annulus-shaped blank with a radial slit. One die is turned on its longitudinal axis while the other remains stationary so that the blank is twisted. After the blank is circumferentially displaced relative to the dies, it is again twisted in the above described manner. This procedure is repeated around the entire circumference of the blank with the result that a helical form is applied to the blank.
Abstract: Rust preventives are provided comprising divalent metal salts of the formula: ##STR1## wherein the R groups are independently selected from methyl, hydrogen, and decyl of the formula: ##STR2## wherein n=0 to 3; and wherein from two to three R groups are decyl, zero to two R groups are methyl, and zero to two R groups are hydrogen; and M is a divalent metal selected from Mg, Ca, Ba, and Zn. Useful intermediates for preparing the said rust preventives are also provided.
October 22, 1984
Date of Patent:
June 3, 1986
Koppers Company, Inc.
Hans Dressler, Samuel N. Holter, Nancy Znidarsic