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The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 7473407 | Magnetic separation process for trona A process for the beneficiation of trona includes supplying a trona feedstream that is crushed and dried. The trona is then separated into a first size fraction and a second size fraction. Impurities are removed from the first size fraction using at least one magnet... | 01/06/2009 |
| 7255841 | Sodium bicarbonate production method A method of producing sodium bicarbonate having a high degree of purity and obtaining a net reduction in effluent waste water, as compared to prior processes, when starting from trona ore is disclosed. The process entails utilizing the waste-water effluent stream fr... | 08/14/2007 |
| 7005076 | Caustic solution treatment process A method for treating a spent caustic solution having a pH greater than about 10.5 includes the steps of (a) lowering the pH of the caustic solution into the range of between about 10 to 10.5 to produce a pH-modified caustic solution; (b) oxidizing the pH-modified c... | 02/28/2006 |
| 6576206 | Bicarbonate conversion in a carbonate monohydrate process A method for converting sodium bicarbonate in a sodium carbonate monohydrate crystallization process to maintain a mother liquor composition in a sodium carbonate monohydrate crystallizer below the invariant point for the crystallizer for reducing or elim... | 06/10/2003 |
| 6475458 | Method for formulating food grade sodium bicarbonate There is disclosed a method for formulating food grade sodium bicarbonate by purification of a sodium bicarbonate liquor where an initial saturated feedstock of sodium bicarbonate which contains sodium sulfate as an impurity is filtered to remove the impu... | 11/05/2002 |
| 6458333 | Process for recycling alkali metal fluorides and/or difluorides The invention relates to a process for recovering alkali metal fluorides and/or difluorides from waste mixtures containing alkali metal chlorides and/or alkali metal fluorides and/or difluorides and, optionally, organic compounds, by (a) subjecting a wast... | 10/01/2002 |
| 6334989 | Production of water-free soda A process is presented in which anhydrous soda is crystallized and worked up to produce anhydrous soda crystals with a bulk density from 1300 to 1600 kg/m3. The process is characterized in that a solvent is used that allows the crystals to be f... | 01/01/2002 |
| 5972506 | Intercalation compounds, method for preparing them and use thereof, particularly in pyrotechnics An intercalation compound of general formula Nax K1-X Zy, wherein Z is a carbon or a polymer with a cyclic, particularly aromatic unit, as base unit; 0 | 10/26/1999 |
| 5900112 | Method of reducing the viscosity of a black liquor using thiocyanate salt A method of recycling sodium-based salts used for digesting wood in a digester during the manufacture of pulp and paper. The method comprises collecting a black liquor from the digester, concentrating the black liquor, and adding a salt to the black liquo... | 05/04/1999 |
| 5609838 | Equilibrium production of sodium carbonate from sodium bicarbonate A process for producing sodium carbonate and other sodium-based chemicals from an aqueous solution containing sodium bicarbonate by contacting an aqueous solution of a bicarbonate-containing composition with a gas that is predominately other than carbon d... | 03/11/1997 |
| 5508012 | Methods for recovering sodium sulfides from a sulfur scavenging reaction A method is provided for the regeneration of a scavenging compound that has been reacted with hydrogen sulfide. Regeneration is accomplished through the use of calcium oxides and sodium hydroxide. Sodium sulfide is recovered from the regeneration process ... | 04/16/1996 |
| 5198145 | Dry detergent compositions Dry-blended detergent formulations are prepared by absorbing liquid surfactant on absorptive soda ash derived from the dehydration of sodium carbonate decahydrate.... | 03/30/1993 |
| 5059404 | Indirectly heated thermochemical reactor apparatus and processes Resonant tubes of a pulse combustor are immersed in a bed of solid particles in a reaction zone to provide indirect heat from the pulsating combustion gases to the solid particles of the bed. The bed is maintained in an agitated state by a gas or vapor fl... | 10/22/1991 |
| 4670232 | Recovery of amines from by-product chloride salts A method is disclosed for separating alkyleneamines from a mixture of by-product alkali or alkaline earth metal chloride salt and alkyleneamines comprising the sequenced combination of the steps of: (a) washing said amine-chloride salt mixture with an aqu... | 06/02/1987 |
| 4560812 | Recovery of glycerine from saline waters Glycerine is recovered from an aqueous waste stream containing but minor amounts of glycerine by the requested steps of; (1) evaporating, (2) contacting with pentanol, (3) separating precipitated salt, (4) flashing to remove pentanol, and (5) vacuum disti... | 12/24/1985 |
| 4451439 | Process for the purification of solutions containing a sodium or potassium carbonate, sulphate, and possibly hydroxide, and at least one of the metals vanadium, uranium and molybdenum A process for the purification of solutions containing sodium or potassium carbonate, sulphate, hydroxide or hydrogen carbonate, and mainly at least one of the metals belonging to the group formed by vanadium, uranium or molybdenum, in the form of sodium ... | 05/29/1984 |
| 4430271 | Energy transfer This invention relates to a process for neutralizing detergent acid mixes containing unreacted sulfating agent such as sulfuric acid with an alkaline component such as sodium hydroxide. The neutralization process is highly exothermic and contains as a by-... | 02/07/1984 |
| 4395356 | Method for removing catalyst residues from solutions of poly-1-butene A process for removing catalyst residues from poly-1-butene which is disclosed which comprises contacting an organic phase containing the poly-1-butene dissolved in an inert hydrocarbon solvent with an aqueous solution of an alpha-hydroxysulfonic acid and... | 07/26/1983 |
| 4365975 | Use of electromagnetic radiation to recover alkali metal constituents from coal conversion residues In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein particles containing alkali metal residues are produced, alkali metal constituents are recovered from the particles b... | 12/28/1982 |
| 4350599 | Process for treatment of caustic waste liquors An improvement in the wet oxidation of caustic waste liquors wherein carbon dioxide produced in the wet oxidation is recycled to raw caustic waste to neutralize the latter, thereby reducing the corrosive nature of the waste.... | 09/21/1982 |
| 4323436 | Purification of aqueous solution of potassium chloride A purification of an aqueous solution of potassium chloride which is used for producing potassium hydroxide by an electrolysisin an electrolytic cell using a cation exchange membrane is carried out by incorporating an oxidizing reagent to remove additives... | 04/06/1982 |
| 4313788 | Process for reducing oxygen consumption in black liquor oxidation High heat recovery and minimized oxygen requirement for oxidation of sulfur compounds in black liquor is obtained by integrating the oxidation into the multiple effect evaporation system of the pulp mill recovery sequence. The oxidation step is carried ou... | 02/02/1982 |
| 4311851 | Preparation of carboxylic acid esters with BF3 -alcohol complex catalyst The invention includes a process wherein an olefin is carbonylated with carbon monoxide to form carboxylic acid esters in the presence of a catalyst complex of one mole of BF3 and one mole of alcohol, and the catalyst is recovered from the desi... | 01/19/1982 |
| 4239589 | Process for oxidation of black liquor High recovery of useful energy from the heat of reaction in the oxidation of black liquor is obtained by integrating the oxidation into the multiple effect evaporation system of the pulp mill recovery sequence. The heat of reaction is thereby recovered as... | 12/16/1980 |
| 4193771 | Alkali metal recovery from carbonaceous material conversion process In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein solid particles containing alkali metal residues are produced in the gasifier or similar reaction zone, alkali metal ... | 03/18/1980 |
| 4193772 | Process for carbonaceous material conversion and recovery of alkali metal catalyst constituents held by ion exchange sites in conversion residue In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein solid particles containing alkali metal residues are produced, alkali metal constituents are recovered for the partic... | 03/18/1980 |
| 4145396 | Treatment of organic waste An organic waste containing at least one element selected from the group consisting of strontium, cesium, iodine and ruthenium is treated to achieve a substantial reduction in the volume of the waste and provide for fixation of the selected element in an ... | 03/20/1979 |
| 4101286 | Bubble forming device having no moving parts A bubble-forming device for gas-liquid contact which can be advantageously used for air oxidation in a liquid phase comprising a housing divided into upper and lower chambers by a partition having an orifice, a liquid inlet in the lower chamber, a gas inl... | 07/18/1978 |
| 4057512 | Alkali metal catalyst recovery system In a coal gasification operation or similar process carried out in the presence of an alkali metal-containing catalyst wherein spent solids containing ash and alkali metal catalyst residues are produced, alkali metal constituents are recovered from the sp... | 11/08/1977 |
| 4039427 | Process for retorting oil shale A process for the recovery of oil from oil-bearing shale and for employing the oil-depleted shale as a combustible heat source. The oil-bearing shale is charged on a traveling grate to form a burden. A bed of oil-depleted shale having uncombusted carbon a... | 08/02/1977 |
| 3998607 | Alkali metal catalyst recovery process A water-soluble alkali metal compound or other soluble constituent is recovered from a mixture of solid particles of different densities and the solid particles are simultaneously separated into two fractions, one having a greater density than the other b... | 12/21/1976 |
| 3997300 | Black liquor oxidation apparatus Gas-liquid contact reaction efficiency in a two stage heavy black liquor oxidation process is improved by co-current contact in the first stage and countercurrent contact in the second stage or vice versa. Such improved efficiency is sustained by preventi... | 12/14/1976 |
| 3988198 | Method for treating hemi caustic effluents Spent hemi caustic effluents from cold caustic extraction of cellulosic pulps are rendered utilizable as a source of sodium hydroxide for pulp processing by heating the effluents for a period of time and at a temperature sufficient to cause the hemicellul... | 10/26/1976 |
| 3962403 | Process for separation of nahcolite from oil shale Nahcolite-bearing oil shale ore is heated to produce a distinct color change in the nahcolite, differentiating the nahcolite from the host oil shale for optical sorting, and such sorting is then accomplished by optical sorting means.... | 06/08/1976 |
