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Hemihydrate

Hemihydrate-related patent applications - as published by the U.S. Patent and Trademark Office (USPTO).


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Method of producing gypsum binder
September 07, 2017 - N°20170253525

A method of producing a gypsum binder, the method including dehydrating of gypsum raw material lumps by heating in a gaseous medium with further drying, cooling, and milling stages, wherein the heating gypsum raw material lumps is performed either by: (i) placing the lumps in a heating medium set to a temperature exceeding the temperature under which dehydration and formation ...
Method for preparing a-calcium sulfate hemihydrate with calcium sulfate dihydrate
Shandong Borui New Material Technology Co., Ltd
August 31, 2017 - N°20170247262

A method for preparing α-calcium sulfate hemihydrate with calcium sulfate dihydrate includes steps of: uniformly mixing the calcium sulfate dihydrate with an additive solution, and obtaining a mixture, wherein weight percentages of the calcium sulfate dihydrate and the additive solution in the mixture are respectively 90. 00-95. 00% and 5. 00-10. 00%, and the additive solution contains water, inorganic salt, organic salt, ...
Cementitious binders containing pozzolanic materials
Green Binder Technologies Ltd.
July 20, 2017 - N°20170204007

A cementitious composition including: a binder containing (a) 60-94%, by weight, of at least one pozzolanic material; (b) at least 0. 5% calcium sulfoaluminate (csa), by weight; (c) 1. 2-11% by weight, expressed as so3, of at least one inorganic sulfate selected from the group of sulfates consisting of a calcium sulfate hemihydrate, an anhydrous calcium sulfate, a calcium sulfate dihydrate, a sodium ...
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Method for producing porous calcium deficient hydroxyapatite granules
Bioventus, Llc
July 13, 2017 - N°20170197833

The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (csa), calcium sulfate dihydrate (csd) or calcium sulfate hemihydrate (csh) to an incubation in an alkaline aqueous solution having a ph-value of less than 10 and containing po43− ions; whereby the granules of calcium sulfate anhydrous (csa), calcium ...
Freeze-thaw durable geopolymer compositions and methods for making same
United States Gypsum Company
June 15, 2017 - N°20170166481

A freeze-thaw durable, dimensionally stable, geopolymer composition including: cementitious reactive powder including thermally activated aluminosilicate mineral, aluminate cement preferably selected from at least one of calcium sulfoaluminate cement and calcium aluminate cement, and calcium sulfate selected from at least one of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; alkali metal chemical activator; and a freeze-thaw durability component ...
Method for producing porous calcium deficient hydroxyapatite granules
Mathys Ag Bettlach
June 08, 2017 - N°20170158510

The method is for producing porous calcium deficient hydroxyapatite granules and comprises the following steps: (a) subjecting granules of calcium sulfate anhydrous (csa), calcium sulfate dihydrate (csd) or calcium sulfate hemihydrate (csh), the granules comprising interconnected pores with a minimum mean diameter of 3 microns, to a first incubation in an alkaline aqueous solution having a ph-value of less than 10 and ...
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High strength synthetic bone for bone replacement for increasing ompressive strength and facilitating blood circulation, ...
Ossein Co., Ltd.
March 09, 2017 - N°20170065740

The present invention relates to a high strength synthetic bone for bone replacement for increasing compressive strength and facilitating blood circulation, and a manufacturing method therefor, and provides the high strength synthetic bone for bone replacement in which calcium sulfate hemihydrate (csh) and nacl, in a particle state, penetrate into the pores of a porous inorganic material such as ...
Quick-drying building material composition based on a mineral hybrid binder
Sika Technology Ag
February 02, 2017 - N°20170029333

A quick-drying gypsum composition, in particular for use as gypsum filling compound and for the production of floor coverings, wherein the gypsum composition contains 20 to 70% of a mixture of calcium aluminate and calcium sulfate hemihydrate and/or anhydrite and/or calcium sulfate dihydrate as hydraulic binders and 30 to 80% by weight of fillers, and wherein the weight ratio of calcium aluminate ...
Struvite-k and syngenite composition for use in building materials
Certainteed Gypsum, Inc.
January 12, 2017 - N°20170008804

A composition and process for the manufacture thereof for use in a hybrid building material comprising at least in part syngenite (k2ca(so4)2. H2o) and struvite-k (kmgpo4. 6h2o). Specified constituents, including magnesium oxide (mgo), monopotassium phosphate (mkp) and stucco (calcium sulfate hemihydrate) are mixed in predetermined ratios and the reaction proceeds through multiple phases reactions which at ...
Coated building panels and articles containing calcium sulfate hemihydrate
United States Gypsum Company
December 08, 2016 - N°20160355438

A method of finishing an interior wall includes the steps of preparing a substrate of building panels comprising gypsum, cement or combinations thereof, said substrate having a surface, followed by applying a coating to the substrate, said coating comprising 1-30% by weight of a latex emulsion binder, 30-80% by weight calcium sulfate hemihydrate, up to about 8% by weight of a ...
Multiphasic bone graft substitute material
Agnovos Healthcare, Llc
December 08, 2016 - N°20160354514

The invention provides a particulate composition adapted for forming a bone graft substitute cement upon mixing with an aqueous solution, comprising i) a calcium sulfate hemihydrate powder, wherein the calcium sulfate hemihydrate is present at a concentration of at least about 50 weight percent based on the total weight of the particulate composition; ii) a monocalcium phosphate monohydrate powder; iii) a ...
Cementitious patch compositions and methods
United States Gypsum Company
November 24, 2016 - N°20160340251

A cementitious hydrating patch composition is provided with improved strength and abrasion resistance. The patch comprises portland cement in the amount from 2% to 10%, calcium sulfate hemihydrate in the amount from 2% to 30%, gypsum in the amount from 0% to 15%, calcium aluminate cement in the amount from 15% to 40%, calcium carbonate in the amount from 0% to 40%, at least one filler in the amount from 1% ...
Method of curing a gypsum calcination product
Saint-gobain Placo Sas
November 24, 2016 - N°20160340244

A method of conditioning stucco comprises the steps of supplying a quantity of stucco particles to a reaction vessel, the stucco particles comprising calcium sulphate hemihydrate and/or calcium sulphate anhydrite, as well as calcium sulphate dihydrate; and conditioning the stucco particles at a temperature of at least 100° c. And a humidity of at least 70%. During the step of ...
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Crystalline form of pemirolast
Rspr Pharma Ab
September 01, 2016 - N°20160250217

There is provided a hemihydrate form of the sodium salt of pemirolast.
Struvite-k and syngenite composition for use in building materials
Certainteed Gypsum, Inc.
August 18, 2016 - N°20160236979

A composition and process for manufacture thereof used in hybrid inventive building materials comprising syngenite (k2ca(so4)2. H2o) and struvite-k (kmgpo4. 6h2o). Starting constituents include magnesium oxide (mgo), monopotassium phosphate (mkp) and stucco (calcium sulfate hemihydrate), mixed in predetermined ratios, cause reactions to proceed through multiple phases, which reactions variously are proceeding simultaneously and in parallel. Variables, ...
Microwave heating for gypsum manufacturing processes
Georgia-pacific Gypsum Llc
May 05, 2016 - N°20160122197

Methods of making calcium sulfate whiskers are provided. In one aspect, a method includes autoclaving a slurry of calcium sulfate hemihydrate and water to form calcium sulfate hemihydrate whiskers in water and microwaving the whiskers to dewater them, wherein the microwaving is effective to prevent a majority of the whiskers from reverting to a dihydrate form. In one aspect, a ...
Building products composites and methods
Georgia-pacific Gypsum Llc
April 21, 2016 - N°20160107937

Methods of manufacturing composites are provided, including combining dihydrate calcium sulfate whiskers, hemihydrate calcium sulfate stucco, and water to form a slurry, and setting the slurry to form a composite having a natural porosity of about 60 volume percent or greater. Composites are also provided, including dihydrate calcium sulfate whiskers and dihydrate calcium sulfate crystals, and having a natural porosity of ...
Crystalline polymorphic forms of an antidiabetic compound
Georgia-pacific Gypsum Llc
March 17, 2016 - N°20160075650

This compound is useful as a glucagon receptor antagonist and serves as a pharmaceutically active ingredient for the treatment of type 2 diabetes and related conditions, such as hyperglycemia, obesity, dyslipidemia, and the metabolic syndrome. Hydrates, hemihydrates, anhydrates and similar polymorphic forms are included.
Compositions and methods for reducing lime bucking in plaster products
United States Gypsum Company
March 10, 2016 - N°20160068434

Methods of treating lime bucking in a plaster slurry are described. The method involves providing a slurry exhibiting lime bucking having a cone penetration of less than 10 mm at a consistency of 60 cc, comprising: water; calcium sulfate hemihydrate; and hydrated lime; and mixing an effective amount of a dispersant comprising a low intensity dispersant into the slurry so that the ...
A method for extracting rare-earth metals
Opened Joint Company "united Chemical Company Uralchem"
February 18, 2016 - N°20160047015

The present invention relates to a method for complex processing of apatite concentrate resulting in producing concentrate of rare earth metals (rem) and plaster from phosphogypsum, a waste of sulphuric acid technology for producing phosphoric acid from apatite. The method comprises leaching of rem into solution by recrystallization of hemihydrate or anhydrite of calcium sulphate into dihydrate of calcium sulphate ...
A method for extracting rare-earth metals
Opened Joint Stock Company "united Chemical Company Uralchem"
February 11, 2016 - N°20160040268

The present invention relates to a method for complex processing of apatite concentrate resulting in producing concentrate of rare earth metals (rem) and plaster from phosphogypsum, a waste of sulphuric acid technology for producing phosphoric acid from apatite. The method comprises recrystallization of hemihydrate or anhydrite of calcium sulphate into dihydrate of calcium sulphate in the presence of a soluble ...
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