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8084642 |
Method of improving the crushing strength, impact resistance and compressibility of urea, and urea composition
A method of improving the crushing strength, impact resistance and the compressibility of urea granules by the addition of a compound to the molten urea, wherein the compound comprises both a...
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8080687 |
Method for reducing aerosol emissions in a urea granulation plant
The invention relates to a process for the granulation of a concentrated urea solution whereas the granulation produces a urea granulate and a dust laden air, which is then fed into a dust scrubber...
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8058469 |
Method for making carbamates, ureas and isocyanates
The present invention provides methods of forming carbamates, ureas, and isocyanates. In certain embodiments these methods include the step of reacting an amine with an ester-substituted diaryl...
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7838080 |
Method for producing urea pellets
A method for producing urea pellets having a narrow range of grain sizes and a sphericity >75% and a defined residual moisture ≦0.5% is provided. The method provides urea pellets having the p...
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7786327 |
Method for co-producing electric power and urea from carbonaceous material
A method for co-producing electric power and urea from carbonaceous fuels such as coal, by pyrolizing the coal with oxygen to produce a raw rich gas and a hot char which is gasified with air to...
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7674932 |
Method for the production of urea from natural gas
Disclosed is a method for the production of urea from natural gas, wherein a) natural gas undergoes partial oxidation or autothermal reformation with a gas containing oxygen in a first step and the...
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7632970 |
Asymmetric urea compound and process for producing asymmetric compound by asymmetric conjugate addition reaction with the same as catalyst
The present invention relates to a production method of asymmetric compound (IV) which includes conjugately adding nucleophilic reagent (III) to compound (II) in the presence of asymmetric urea...
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7608735 |
Process for urea production and related plant
A process for urea production from ammonia and carbon dioxide, in which part of the aqueous solution comprising urea, ammonium carbamate and ammonia obtained in a urea synthesis section is...
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7498055 |
Process for the preparation of urea granules
Process for the preparation of urea granules in a fluid-bed granulator, by using at least one feeding device to feed a urea melt in the form of a film to a fluidized bed of solid urea nuclei, upon...
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7163792 |
Compositions and methods for optimized hybridization using modified solutions
The invention provides a composition, kit and method for hybridizing a probe and target at a temperature lower than their standard hybridization temperature. The chemical component added to the...
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6962945 |
N-aryloxypropanolyl-N′-phenethyl-urea
The present invention provides N-aryloxypropanolyl-N′-phenethyl-urea derivatives of formula 3, method for their preparation and use thereof as potent appetite suppressants for treatment of o...
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6420398 |
Urea derivatives having nitrogen aromatic heterocycle
An object of the present invention is to provide novel urea derivatives which have TNF-α production inhibitory effects and are useful as therapeutic agents for various diseases, particularly as ...
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6278021 |
Reduced particle-size urea
A process for producing an urea preparation of reduced particle-size and narrow particle-size distribution by using an air milling process is provided. Also provided is an urea preparation of...
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5985968 |
Surface tension reduction with N,N-dialkyl ureas
This invention provides water-based compositions, particularly coating, ink, and agricultural compositions, manifesting reduced equilibrium and dynamic surface tension by the incorporation of an...
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5961670 |
Sulfur dyes
New sulfur dyes comprising in their preparation at least one sulfur dye intermediate of the formula I ##STR1## wherein R and R1 are independently nitro, nitroso or amino, are produced by including...
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5847209 |
Process for recovery of solid and reusable urea from the urea adduction process
A process for recovery of solid and reusable urea from the urea adduction process. Refinery streams are subjected to a step of urea adduction for removal of unwanted branched products, aromatics...
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5770739 |
Non-aqueous hydrogen peroxide complex
An apparatus and process for hydrogen peroxide vapor sterilization of medical instruments and similar devices make use of hydrogen peroxide vapor released from a substantially non-aqueous organic...
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5717118 |
Process for preparing amido-carboxylic acid esters having internal amide linkages
The present invention relates to a one-step process for preparing amido-carboxylic acid esters having the amide nitrogen positioned between two carbonyl carbons by reacting a carboxylic acid or...
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5716591 |
Process for producing calcium nitrate-urea adduct
Calcium nitrate-urea adduct, a product having the formula Ca(NO3)2.4CO(NH2)2 !, is obtained by means of a process which basically consists of the following steps: mixing molten urea and calcium...
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5705138 |
Process for manufacturing synthetic gas and associated utilization
The invention relates to the manufacturing of synthetic gas according to which the following stages are performed within a single housing: partial combustion in a non catalytic combustion chamber,...
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5650090 |
Compositions for thermal energy storage or thermal energy generation
A composition for thermal energy storage or thermal energy generation comprising a silica based gel or dry powder in the form of silica particles containing a water/urea phase change material for...
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5494498 |
Methods for using concentrated nitrogen-containing fertilizers
Urea increases the solute content of a fertilizer comprising water and at least two different nitrate-containing compounds selected from the group consisting of ammonium nitrate, alkali metal...
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5476527 |
White atoxic urea fertilizer composition
A fertilizer composition is provided which is characterized by high mechanical resistance, anti-caking properties, and a substantially white color, and which fertilizer includes urea and a...
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5470370 |
Complex composition resulting from the action of urea on a sulfuric sludge of petroleum origin, process for the preparation thereof and use thereof as a source of fertilizing material
A complex composition formed by the product resulting from the action of urea on a sludge of petroleum origin containing by weight from 50 to 99% of sulfuric acid and from 1 to 20% of organic...
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5436372 |
Solid state displacement elements
The invention is intended to provide novel solid state displacement elements that have an extent of displacement. The solid state displacement element has an intercalation compound in which a polar...
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5417737 |
Concentrated nitrogen-containing fertilizers having increased alkaline earth metal uptake
Urea increases the solute content of a fertilizer comprising water and at least two different nitrate-containing compounds selected from the group consisting of ammonium nitrate, alkali metal...
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5399755 |
Process and equipment for the hydrolysis of residual urea in the water from synthesis plants
Process for the hydrolysis of urea contained in the process water from plants for the synthesis of urea consisting of the thermic treatment of the water containing urea and of the removal by...
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5380943 |
Process and plant for the production of urea with differentiated yield reaction spaces
Process for the industrial synthesis of urea, by reacting ammonia (NH3) and carbon dioxide (CO2) in at least one reaction space, at high pressures and temperatures and by recirculating at least...
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5276130 |
Aminoplast resin or aminoplast resin precursor
According to the present invention, a β-dicarbonyl functionality, an α,β-unsaturation functionality, or a vinylogous amide functionality is incorporated into an aminoplast resin or an aminoplast re...
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5266097 |
Aminoureaformaldehyde fertilizer method and composition
A new method of preparing a new aminoureaformaldehyde fertilizer composition which exhibits high cold water insoluble nitrogen (CWIN) levels and high Availability Indices (AI). The method utilizes...
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5177205 |
Method for obtaining a solid polycrystalline material
Method for obtaining an organic polycrystalline material having in particular electro-optical properties, said material obtained and an electro-optical modulator comprising said material.This...
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5118852 |
Tert-amine treatment
A tert-amine which contains an acid-activated color body precursor is treated to prevent it or a derivative thereof, e.g., an amine oxide, betaine, or quaternary ammonium compound, from turning...
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5093528 |
Process for the production of secondary amine terminated polyethers and their use
Process for producing a secondary amine terminated polyether from a primary amine terminated polyether in which the primary amine terminated polyether is reacted at elevated temperature with a...
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5032164 |
Modified lignosulfonate conditioning agent for urea particles
Urea fertilizer is treated with a modified lignosulfonate to harden and provide anti-caking and anti-dusting properties to the fertilizer particles. The fertilizer/modified lignosulfonate mixture...
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4962283 |
Single pass continuous urea-sulfuric acid process
Urea and sulfuric acid are reacted in an air-water spray in cocurrent heat exchange therewith to produce concentrated urea-sulfuric acid solutions.
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4879413 |
Process for the preparation of a solid adduct of sulfuric acid and urea
A method for processing exposed and developed photographic silver dye-bleach materials, in which the exposed and developed material is treated with aqueous bleaching preparations which contain (a)...
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H000676 |
Production of urea fluorosilicate
A process for producing urea fluorosilicate, [(NH2)2 CO]4 H2 SiF6, a composition eminently suitable for use as a fungicide in the prevention and control of wheat stem rust. The method involves m...
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4725680 |
Process for the preparation of carbamates, thiocarbamates and ureas
The invention relates to a process for preparing carbamic acid derivatives of formula: ##STR1## in which R1 or R2 denotes a hydrogen atom or a substituted or unsubstituted, saturated or unsaturated...
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4676821 |
Sulfur-coated urea
The present invention teaches a technique and provides for apparatus eminently useful for reducing the amount of sulfur currently needed by industry to coat water-soluble fertilizer materials such...
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4587358 |
Production of high-strength, storage-stable particulate urea
One approach to improving storage stability, particularly that attribute characterized by reduction in the tendency for caking during storage of freshly prepared urea particles such as granules, is...
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H000038 |
Process for the preparation of urea and its derivatives from CO, NO, and a hydrogen source
A process for the preparation of urea and its derivatives by reacting CO, NO, and a hydrogen source over a supported noble metal catalyst at atmospheric pressure is described. Preferably,...
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4542006 |
Catalytic process for the production of urea and ammonium cyanate
A catalytic process has been found to produce urea or its equivalent, NH4 NCO, under relatively mild pressure and temperature conditions. This process entails flowing a gas mixture containing NOx,...
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4537990 |
Method for growing single crystals of urea
This invention relates to growing single crystals of urea having increased dimensions on the 110-110 faces by physically restricting growth of the 111 faces of a seed crystal while precipitating...
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T105302 |
Tamper-resistant container
A tamper-resistant container containing a pharmaceutical preparation, wherein the container is a removable full-panel easy-open metal top end closure having an opening tab for irreversibly removing...
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4507139 |
Acid type solid urea-nitric fertilizer
The present invention relates to the reaction of phosphate rock with nitric acid and urea to produce nitrogen-phosphorus containing slurries, which slurries, in turn, may be granulated and dried to...
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4497739 |
Synthesizing thiocarbamic acid esters
A process for the synthesis of thiocarbamic acid esters by reacting amine compounds having a general formula ##STR1## wherein A is an arylene radical, simple or substituted by halogens hydrocarbon...
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4494976 |
Fertilizers containing nitrogen and micronutrients
Metal oxides are applied to the surface of urea particles and chemically bonded to the urea by a heat-induced reaction. The product of this reaction is a free-flowing, relatively nonhygroscopic...
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4460602 |
Urea derivatives
A compound, or pharmaceutically acceptable salt thereof, having the formula: ##STR1## wherein X is O or S; wherein n=1 or 0; wherein R is C3 -C12 alkyl or aralkyl, branched or unbranched, aryl or...
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4449900 |
Prilling
Prilling apparatus for producing prills of ammonium nitrate or urea in which a diverging shroud extends from each prilling head. Means for supplying ammonia is connected to the shroud. The prills...
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4431558 |
Heat accumulating material
The heat accumulating material of this invention comprising three components of calcium chloride (CaCl2), urea [CO(NH2)2 ] and water (H2 O) can have varied temperatures of heat accumulating and...
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