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US 8,715,568 B2Granted
Use of compositions containing silicon for improving the corrosion resistance of vessels
AssigneeSolvay SA
InventorsJosselin Bobet, Christian Franck
Life of this patent
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AssigneeSolvay SA
InventorsJosselin Bobet, Christian Franck
Estimating the term…
Use of a composition comprising silicon, oxygen and at least one of calcium, potassium, or titanium, as a material for coating an equipment or as a constituent material of equipment, intended to be in contact with a mixture containing a chlorohydrin, hydrogen chloride and water. The use of the composition may provide a method for reducing corrosion of the equipment, for decreasing the frequency of replacement of the equipment and/or for lowering the risks linked to equipment breakage and leak. The equipment which is intended to be in contact with the mixture may be used in a process for manufacturing a chlorohydrin, in which a polyhydroxylated aliphatic hydrocarbon, an ester of a polyhydroxylated aliphatic hydrocarbon or a mixture of the two, is reacted with a chlorinating agent that contains hydrogen chloride.
A method for reducing corrosion of an equipment in contact with a mixture comprising a chlorohydrin, hydrogen chloride and water, said method comprising contacting said equipment with said mixture in a contact region, wherein at least a part of said contact region is coated with a composition that comprises silicon, oxygen, calcium, potassium and titanium or at least a part of said contact region is made of said composition, and wherein silicon is present in said composition in an amount higher than or equal to 235 g of Si per kg of composition, calcium is present in said composition in a positive amount lower than or equal to 25 g of Ca per kg of composition, potassium is present in said composition in an amount higher than or equal to 4 g of K per kg of composition and titanium is present in said composition in a positive amount lower than or equal to 10 g of Ti per kg of composition.
Dependencies are inferred from the claim text.