us patent 5500197 process of purifying gypsum patents

US5500197A - Process of purifying gypsum - Google Patents
The process for purifying gypsum suspensions, particularly those formed in a flue gas desulfurizing plant, includes feeding the gypsum suspension (9) to a first hydrocyclone (1), which is operated to produce an underflow (11) with a comparatively high underflow concentration and an overflow fed to a collecting tank (2). The underflow (11) of the first hydrocyclone stage is further diluted to a ...
Process of purifying gypsum - Metallgesellschaft ...
Oct 29, 1991 The process for purifying gypsum suspensions, ... United States Patent 5500197 . Abstract: The process for purifying gypsum suspensions, particularly those formed in a flue gas desulfurizing plant, includes feeding the gypsum suspension (9) to a first hydrocyclone (1), which is operated to produce an underflow (11) with a comparatively high ...
Byproduct Gypsum (e.g., Phosphogypsum, Etc.) Patents and ...
Jul 07, 2017 Assignee: United States Gypsum Company Inventors: Salvatore C. Immordino, Therese Espinoza, Richard B ... Patent number: 5500197 Abstract: The process for purifying gypsum suspensions, particularly those formed in a flue gas desulfurizing plant, includes feeding the gypsum suspension (9) to a first hydrocyclone (1), which is operated to produce ...
US3307987A - Process of making a gypsum ... - Google Patents
US3307987A US833281A US83328159A US3307987A US 3307987 A US3307987 A US 3307987A US 833281 A US833281 A US 833281A US 83328159 A US83328159 A US 83328159A US 3307987 A US3307987 A US 3307987A Authority US United States Prior art keywords gypsum paper core water wallboard Prior art date 1959-08-12 Legal status (The legal status is an assumption and is not a legal
US Patent for Purification process Patent (Patent ...
Justia Patents Calcium US Patent for Purification process Patent (Patent # 4,208,393) Purification process . Sep 14, 1978 - Tioxide ... When testing the gypsum produced by the foregoing process for suitability as a raw material in the manufacture of plasterboard i.e. to measure the consistency and, if desired, set time of the calcium sulphate ...
Process of purifying gypsum - Metallgesellschaft ...
Oct 29, 1991 The process for purifying gypsum suspensions, ... United States Patent 5500197 . Abstract: The process for purifying gypsum suspensions, particularly those formed in a flue gas desulfurizing plant, includes feeding the gypsum suspension (9) to a first hydrocyclone (1), which is operated to produce an underflow (11) with a comparatively high ...
US3642456A - Process for purifying gypsum using ...
In abstract, this invention is directed to a process for purifying crude gypsum, comprising dissolving the gypsum in a hot aqueous fluosilicic acid solution, separating the resulting gypsum containing solution from insoluble impurities, cooling the separated gypsum solution to precipitate purified gypsum therefrom, separating the purified gypsum from the mother liquor from which it (the ...
US Patent for Method of purifying by-product gypsum Patent ...
Justia Patents Treating Impure Sulfate (e.g., Barite, Etc.) US Patent for Method of purifying by-product gypsum Patent (Patent # 4,612,173) Method of purifying by-product gypsum Mar 2, 1984 -
Method for processing phosphogypsum, containing ...
The difference lies in the fact that the moisture content of the gypsum is 20% and the purification of the mother liquor in it enter titanylsulphate monohydrate TiOSO 4 H 2 About in the form of a sulfuric acid solution with a content of 60 wt.% TiOSO 4 H 2 O and 34.3 wt.% sulfuric acid, the amount of solution titanylsulphate monohydrate ...
Fermentation and purification process for succinic acid ...
United States Patent 5168055 ... After calcium sulfate (gypsum) filtration, residual cations, anions, and nitrogenous materials still remained in the succinic acid filtrate. ... than one percent nitrogenous impurity and less than 5 ppm sulfate and calcium ions is produced by the fermentation and purification process of the present invention.
METHOD FOR PROCESSING PHOSPHOGYPSUM, AND DEVICE
Dec 28, 2009 The technical effect of the proposed invention of the phosphogypsum processing is aimed at providing non-waste technology, including production of commercial gypsum, REE concentrates, releasing the obtained products from technological acids with their subsequent neutralization, use a closed circuit for technical water.
Method for processing phosphogypsum, containing ...
The difference lies in the fact that the moisture content of the gypsum is 20% and the purification of the mother liquor in it enter titanylsulphate monohydrate TiOSO 4 H 2 About in the form of a sulfuric acid solution with a content of 60 wt.% TiOSO 4 H 2 O and 34.3 wt.% sulfuric acid, the amount of solution titanylsulphate monohydrate ...
Indian Patents. 195823:"A PROCESS FOR THE PRODUCTION OF ...
Reference may be made to US Patent no.4264570 here in the magnesium sulphate is produced by interacting ferrous sulphate with compounds including magnesium carbonate, oxides and hydroxides. The step of inter reacting the starting reagents is conducted in water medium in the presence of carbon dioxide and is effected in the temperature range of ...
Indian Patents. 263979:"AN IMPROVED PROCESS FOR ...
Reference may be made to the US Patent No.: 4,255,399 Dated March 10, 1981 entitled "Process for the Recovery of Magnesium Oxide of high Purity" by Grill et. al, wherein magnesium oxide is obtained by thermal decomposition of a magnesium chloride brine previously purified.
Tae Lee, Ph.D. - Environmental Engineer - US Environmental ...
Jan 2008 - Feb 20113 years 2 months. Austin, Texas. • CD/TOX targeting team leader and technical representative of a inter-departmental engineering and technician team tasked with 52, 35,32,22 ...
Patents Assigned to Dow Chemical Company - Justia Patents ...
Justia - Patents - Patents and Patent Application Resources. Abstract: A new use for a process gas chromatography liquid injection valve of the Bendix type, i.e., a valve having a distal heated vaporization chamber, a central sample chamber, a valve stem bore intersecting both chambers, a radially grooved valve stem positioned within the valve stem bore and an air actuator for moving the valve ...