Abstract: The present invention provides highly fluorescent markers, made from a reactive polymer and an isocyanate, that fluoresce in the ultraviolet or near infrared region without being visible to the human eye at low concentrations in the fluid or article being marked. The molecular weight and fluorescence emission wavelength of these highly fluorescent marker compounds can be adjusted to provide a multitude of markers with unique fluorescence signatures.

Abstract: The present invention provides highly fluorescent markers, made from a reactive polymer and an isocyanate, that fluoresce in the ultraviolet or near infrared region without being visible to the human eye at low concentrations in the fluid or article being marked. The molecular weight and fluorescence emission wavelength of these highly fluorescent marker compounds can be adjusted to provide a multitude of markers with unique fluorescence signatures.

Abstract: The present invention provides highly fluorescent markers, made from a reactive polymer and an isocyanate, that fluoresce in the ultraviolet or near infrared region without being visible to the human eye at low concentrations in the fluid or article being marked. The molecular weight and fluorescence emission wavelength of these highly fluorescent marker compounds can be adjusted to provide a multitude of markers with unique fluorescence signatures.

Abstract: A mixture of acrylic acid and nitrogen compounds is particularly adapted to achieve a sulfur-free odorization of a gas.

Abstract: A new chromotropic compound, compositions containing such a compound and methods of using such compound, such as in a test method for identifying the presence of free radicals, are disclosed.

Abstract: Process for treating coal to enhance its rank, wherein the temperature of the material is gradually increased in a controlled set of atmospheres, to allow for the reduction of surface and inherent moisture and the controlled reduction of volatile matter while maintaining the coal's natural structural integrity. The process reduces the time, capitalization, and production costs required to produce coal of enhanced rank, thus substantially increasing the cost effectiveness and production rate over prior processes.

Abstract: A method of forming a decorative candle. The method comprises providing a candle which is fabricated from a wax material that defines a top surface. Next, a source of heat is applied to the candle until at least that portion of the wax which defines the top surface thereof is melted. Then at least one gelatinous component formed from a mineral oil gel is placed onto the top surface such that the component is at least partially inserted into the molten wax. The candle is allowed to cool thereby hardening the molten wax and securing the gelatinous component. The melting point of the gelatinous component is higher than the melting point of the wax such that the component will not melt when placed upon the molten wax.

Abstract: A decorative candle and method of forming a decorative candle are disclosed. The decorative candle is fabricated from a wax material that defines a bottom layer having a top surface. At least one flanged gelatinous component formed from a mineral oil gel is placed onto the top surface of the bottom layer. A second layer of wax having a top layer is added such that the entire flange portion of the gelatinous component is covered, but at least a portion of the decorative (non-flange) portion of the gelatinous component protrudes above the top surface of the top layer of the candle.

Abstract: Two or more dyes or markers, including a dye or marker having an absorbance peak in the 400 to 500 nm range and including a dye or marker having an absorbance peak in the 560 to 700 nm range are mixed together in appropriate ratios so when added to a liquid, such as a petroleum fuel, at combined levels of from 5 to 100 ppm, the colors of the dyes and/or markers cancel each other such that a “water-white” liquid still appears “water-white”.

Abstract: A decorative candle and method of forming a decorative candle are disclosed. The decorative candle is fabricated from a wax material that defines a bottom layer having a top surface. At least one flanged gelatinous component formed from a mineral oil gel is placed onto the top surface of the bottom layer. A second layer of wax having a top layer is added such that the entire flange portion of the gelatinous component is covered, but at least a portion of the decorative (non-flange) portion of the gelatinous component protrudes above the top surface of the top layer of the candle.

Abstract: A method of forming a decorative candle. The method comprises providing a candle which is fabricated from a wax material that defines a top surface. Next, a source of heat is applied to the candle until at least that portion of the wax which defines the top surface thereof is melted. Then at least one gelatinous component formed from a mineral oil gel is placed onto the top surface such that the component is at least partially inserted into the molten wax. The candle is allowed to cool thereby hardening the molten wax and securing the gelatinous component. The melting point of the gelatinous component is higher than the melting point of the wax such that the component will not melt when placed upon the molten wax.

Abstract: A method of forming a decorative candle. The method comprises providing a candle which is fabricated from a wax material that defines a top surface. Next, a source of heat is applied to the candle until at least that portion of the wax which defines the top surface thereof is melted. Then at least one gelatinous component formed from a mineral oil gel is placed onto the top surface such that the component is at least partially inserted into the molten wax. The candle is allowed to cool thereby hardening the molten wax and securing the gelatinous component. The melting point of the gelatinous component is higher than the melting point of the wax such that the component will not melt when placed upon the molten wax.

Abstract: Leakage in a heat exchanger between two liquids which are in indirect heat exchange relationship is detected by marking one of the two liquids with a colorless chemical marker and detecting it in the second liquid by extraction and conversion to a colored material. The heat exchanger liquids are preferably organic liquids which are immiscible with water. The marker is detected in a heat exchanger liquid by extraction of the marker followed by chemical conversion of the marker to a colored material that can be detected visually. Aminoalkylnaphthalenes are suitable markers which can be extracted by an acidic aqueous solution and converted to a colored material by reaction with a diazotized aromatic amine. Phenylazoalkylphenol derivatives are also suitable markers which can be extracted and simultaneously converted to a colored material with a detection reagent which is comprised of water and a water-soluble amine.

Abstract: A method of monitoring the movement of a material which comprises adding to the material, as a microtrace additive, DNA molecules, sampling the resulting material after movement thereof and detecting the presence of said microtrace additive in the sample. The method is particularly suitable for use in monitoring the movement of oil shipments and the microtrace additive is selected such that it will remain in the oil phase in the event the oil is dispersed in water e.g. sea water.

Abstract: A dye which is either 2-naphthalenol (phenylazo) phenyl azo alkyl derivatives and 1,4-dialkylamino anthraquinone is added to sufficient non-ionic surfactant to compatibilize it with ethanol and an solvent to produce a homogeneous solution. The homogeneous solution is added to ethanol in an amount to provide a desired amount of coloration to the ethanol.

Abstract: A method of testing oil for unstable reactive compounds include reacting unstable compound from an oil sample with an acid catalyst to form a reaction product, the color of which is then related to the presence and/or amount of reactive compound in the oil. Kits combining the necessary materials and reagents for performing the test method are also provided.

Abstract: Briquettes are tested to decrease efflorescence and to improve abrasion resistance and surface appearance, by dipping or spraying the formed briquettes with a solution of polyvinyl alcohol having a concentration greater than 1 part of polyvinyl alcohol to 250 parts of water.

Abstract: A clean and attractive carbonaceous fuel product is provided for improved convenience and marketability. Coal or charcoal can be coated with a clean and durable coating for cleanliness in handling; and, the coating can be colored as desired. Further, a metal salt can be added to the coating or the product itself to color the flame while the product burns. Paraffin can be used as the coating, and the paraffin is maintained above its melting point to improve gloss. Other additives can also improve gloss. Coal is preferably coated with latex to provide an attractive coating that will prevent breaking of the coal. A flammable liquid can be incorporated into charcoal briquettes for easier lighting; and, the liquid reduces the amount of paraffin used in the coating. A masking agent hides the odor of the flammable liquid, the masking agent being in the coating rather than in the flammable liquid itself.