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Patent No. 5687752

Dining Table Having Integral Dishwasher

A space-saving dishwasher, which may be installed within a counter top or table, having a dish-carrying rack that is vertically shiftable through the open top of the dishwasher for facilitating loading and unloading of the dishes.

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Class 423/207 - Burning the impurity


Subclass of Class 423 - Chemistry of inorganic compounds
Definition: Processes including combusting the organic or carbonaceous
No. of patents: 49
Last issue date: 07/30/2002


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NumberTitleIssue Date
6425976Method for black liquor gasification in recovery boilers
The invention refers to a method for black liquor gasification in recovery boilers, of the type having a lower portion, referred to as a lower furnace and an upper portion, referred to as an upper furnace, black liquor sprayers for introduction of black l...
07/30/2002
6228214Method for black liquor gasification in recovery boilers
The invention refers to a method for black liquor gasification in recovery boilers, of the type having a lower portion, referred to as a lower furnace and an upper portion, referred to as an upper furnace, black liquor sprayers for introduction of black l...
05/08/2001
5984987Black liquor gasification process
Aqueous black liquor is gasified in a molten salt by spraying the black liquor into an enclosed zone above the surface of a turbulent molten salt pool. The black liquor is dried by means of hot gases rising from the surface of the pool and the resulting s...
11/16/1999
5702570Process of producing sodium hydroxide from sodium sulphate in a pulp mill
Sodium hydroxide is formed from sodium sulphate by a three step operation comprising converting the sodium sulphate to sodium sulphide, converting the sodium sulphide to sodium bicarbonate, and converting the sodium bicarbonate to sodium hydroxide. The op...
12/30/1997
5545385Process for recovering alkali metal hydroxide from organic liquors
The specification describes a process for recovering alkali metal hydroxides from an organic liquor such as black liquors derived from pulping wood chips. The organic liquor is burned in a fluidised bed combustion furnace containing fluidised particles of...
08/13/1996
5405496Process for the preparation of cooking liquors having high sulphidity for sulphate pulp cooking
The invention relates to a process for preparation, under reducing conditions, of cooking liquors having high sulphidity for sulphate pulp cooking, wherein the black liquor obtained in the cooking process is fed, after evaporation, completely or partly to...
04/11/1995
4913736Process for recovering platinum group metals
A process for recovering Platinum Group metals from material comprising one or more Platinum Group metals and one or more Group IA metals supported on carbon comprises heating at a temperature between 700° C. and 1150° C. in a stream of an inert gas or ...
04/03/1990
4857282Combustion of black liquor
A process for combusting black liquor by enriching the normal process air used in the combustion process by the addition of up to 5% oxygen....
08/15/1989
4718978Spent pulping liquor recovery process
A partially-oxidized spent pulping liquor is produced which is added to unoxidized strong spent pulping liquor prior, during, or subsequent to concentration to form a novel partially-oxidized, concentrated, high total solids spent pulping liquor. This nov...
01/12/1988
4710269Recovering chemicals from spent pulp liquors
The present invention relates to a method and means of increasing capacity and improving the chemical recovery process when using a conventional soda recovery boiler for recovering chemicals out of spent sulphate liquors. The spent sulphate liquor is supp...
12/01/1987
4682985Gasification of black liquor
A concentrated aqueous black liquor containing carbonaceous material and alkali metal sulfur compounds is treated in a gasifier vessel containing a relatively shallow molten salt pool at its bottom to form a combustible gas and a sulfide-rich melt. The ga...
07/28/1987
4637858Pyrolysis of black liquor at high temperatures using radiant energy
This invention is a process for recovering sodium hydroxide directly from black liquor. The process involves pyrolyzing the black liquor in the absence of oxygen to produce a product containing sodium carbide, and hydrolyzing the sodium carbide to form so...
01/20/1987
4486394Alkali regeneration process
The invention relates to an improvement in a method of regenerating alkaline or alkaline earth metal oxides or hydroxides from solution particularly in delignification processes wherein a suitable transition metal such as ferric oxide is burnt with the so...
12/04/1984
4439272Pulp mill residual liquor recovery process
A method and apparatus for recovering chemical from residual liquor from a pulping operation, said residual liquor containing inorganic and organic components, pyrolyzing a portion of the organics in the liquor to produce a reducing gas and residual solid...
03/27/1984
4377439Pulp mill recovery
A recovery system for residual liquor from a pulp mill, utilizing a fluidized bed to burn the organic material in the residual liquor and generate heat which may be recovered. Heat preferably from the flue gases is used to dry residual liquor sprayed to p...
03/22/1983
4363698Method for drying and burning viscous aqueous liquors which contain organics
Sawdust is mixed with partially concentrated black liquor from pulp manufacture. The sawdust, coated with the solids of the black liquor, is dried by heated air. The sawdust, coated with organic and inorganic black liquor solids, is fed to the hearth of a...
12/14/1982
4347226Method for treating sulfur-containing effluents resulting from petroleum processing
The present invention is a method for disposal of noxious waste products generated in petroleum refining including spent caustic solution and concentrated sulfur effluent from treating of petroleum fractions to remove sulfur therefrom. Essentially the spe...
08/31/1982
4334956Method of reutilizing kraft spent liquor
A method of utilizing kraft black liquor by converting the black liquor to "green liquor" and then oxidizing the green liquor with air in the presence of a quinone compound or spent liquor from the kraft process, the soda semi-chemical process or the neut...
06/15/1982
4329199Process for digesting and bleaching cellulosic material with reduced emissions
The digestion of the cellulose-containing material is performed with a digestion liquor containing sulphur and sodium followed by recovery and regeneration of said digestion liquor and bleaching of the cellulose-containing material with chlorine dioxide. ...
05/11/1982
4322266Process for catalyzing reduction in a Kraft recovery boiler
A Kraft pulping process by which spent pulping liquor is burned in a recovery furnace 12 to reduce inactive alkali sulfates therein to active alkali sulfides while producing molten smelt that when added to water forms green liquor and residual dregs beari...
03/30/1982
4312702Fluidized bed start up and operation
At start-up, a bed of pellets derived from pulp mill residual liquor is fluidized by feeding preheated air to the bed to initially raise the temperature of the bed to a temperature at which a particulate ligno-cellulosic auxiliary solid fuel may be comple...
01/26/1982
4299652Process for recovery of pulp mill chemicals
A process is disclosed in which a waste gas containing sulfur compounds and carbon dioxide from pulp mill is contacted with an aqueous alkali solution derived from green liquor, white liquor or weak white liquor having low pH value and low sodium ion conc...
11/10/1981
4288286Kraft mill recycle process
A cellulosic pulp and bleaching process is described. The process integrates two cycles, one is a digestor liquor cycle and the other is a sulfur cycle. The digestor liquor cycle comprises the steps of digesting a fibrous cellulosic feed to form a pulp, s...
09/08/1981
4237103Method for disposal of sodium waste material
A method for disposal of sodium containing waste material comprising combustion sodium containing waste material and a silica bearing material in an incinerator having interior walls lined with a refractory material which tends to react with metallic sodi...
12/02/1980
4224289Alkali regeneration process
In the regeneration of alkaline liquors as used in paper pulping, a mixed oxide compound of an alkali or alkaline earth metal oxide and an oxide of Ti, Fe, Co, Ni, or Mn is formed by burning black liquor. The burning step is carried out in a fluidized bed...
09/23/1980
4212702Process for recovery of chemicals from pulping waste liquor
A process for recovery of chemicals from a sodium sulfite pulping waste liquor is disclosed in which a smelt obtained from the waste liquor is introduced into an aqueous slurry containing solidified smelt while make up water and a weak aqueous slurry are ...
07/15/1980
4208245Pyrolysis of spent pulping liquors
The present invention discloses a process of pretreating a waste black liquor which results from the pulping of various vegetative fibers and wherein the pulping liquor contains as its active pulping ingredient sodium and sulfur with the pretreatment taki...
06/17/1980
4177246Wet oxidation of materials
Materials with unfulfilled chemical oxygen demand are oxidized in a liquid environment at superatmospheric temperatures and pressures. The liquid environment is created within a pressure vessel by an inert liquid that is capable of absorbing and dispersin...
12/04/1979
4154643Recovery process and apparatus for alkali metal-containing spent liquor
An alkali metal-containing spent liquor is treated to recover the alkali metal content for reuse without the need for recycling furnace ash and forming solid pellets therefrom. A mixture of aluminum hydrate and alkali metal-containing waste liquor is dire...
05/15/1979
4148684Methods for recovery and recycling of chemicals from sodium sulfite and sodium bisulfite pulping operations
An improved method for recovering spent sodium and sulfur components in sodium sulfite and sodium bisulfite pulping operations. The method involves reduction burning of spent liquor to convert it to smelt and the treatment of this smelt in a sequence of o...
04/10/1979
4144311Purifying salts containing organic pollutants
A process for purifying organically polluted salts comprising forming a melt of said salts at a temperature of from about 600°to 1000° C., and contacting salt melt with an oxygen-containing gas. Acidic or basic fluxes may be present. The heat to maintai...
03/13/1979
4141785Process for recovery of chemicals from pulping waste liquor
A process for recovery of chemicals from a sodium sulfite pulping waste liquor is disclosed in which a smelt obtained from the waste liquor is introduced into an aqueous slurry containing solidified smelt while make up water and a weak aqueous slurry are ...
02/27/1979
4093508Process for recovering chemicals from the waste liquors of sulfate cellulose digestion and the waste waters of bleaching
A process for the recovery of chemicals from the waste liquors of sulfate cellulose digestion and from the waste waters of bleaching, wherein a melt from a soda-ash roaster, mainly containing sodium sulfide and sodium carbonate, but also sodium chloride, ...
06/06/1978
4067767Liquid phase coking of spent kraft pulping liquors
An improved process for treating spent Kraft wood pulping liquors by coking the liquors after reducing the pH thereof with SO2 and recovering the sulfur contained in the resulting coke by contact with hydrogen preheated to temperatures in the r...
01/10/1978
4049787Process for separating sulphur in the form of hydrogen sulphide from clarified green liquor obtained from the combustion of waste liquor
The invention relates to a process for separating hydrogen sulphide from clarified green liquor, including precarbonating green liquor with a carbon dioxide rich gas, adding alkali bicarbonate to the precarbonated green liquor and stripping hydrogen sulph...
09/20/1977
4049489Method of producing pulp and burning waste liquor obtained thereby
Environmental regulations tend to restrict the emissions from pulping platns, which increase the amount of sulphur and chlorine in the cooking liquor to undesirable amounts. This is detrimental to the process and increases the risk of corrosion upon the f...
09/20/1977
4044097Recovery of soda values from sodium carbonate crystallizer purge liquors
Soda values from the crystallizer mother liquor purge in the process of making sodium carbonate from trona are recovered by (1) mixing the purge with treating agent of magnesium oxide, aluminum oxide, bauxite, certain fine particle size calcined trona, in...
08/23/1977
4035228Recovery process and apparatus for alkali metal-containing waste liquor
A process and apparatus for treating concentrated alkali metal-containing waste liquor to recover the alkali metal content for reuse includes the following steps and apparatus. Concentrated alkali metal-containing waste liquor is mixed with recycled alumi...
07/12/1977
4007082Kraft mill recovery system
An improved process for the treatment of precipitator catch wherein the catch is slurried with water, sufficient carbon dioxide is added to convert the sodium carbonate present to sodium bicarbonate, and sodium chloride is separated from the sodium sulfat...
02/08/1977
4000264Method of recovering sodium hydroxide from sulfur free pulping or bleaching waste liquor by mixing ferric oxide with condensed waste liquor prior to burning
This invention relates to a new and improved recovery method of chemicals from waste liquor of pulping or bleaching. More particularly, this invention relates to a method for direct recovery of sodium hydroxide from waste liquor of pulping or bleaching wh...
12/28/1976
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