Method for treating calcium borate ores to obtain useful boron compounds
OwnerThomas L. Bossermaninventor
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Abstract
A method for producing products for treating wood and other cellulose products to improve the flame retardancy, and the insecticidal and fungicidal properties of the products. A calcium borate ore, such as colemanite, is reacted first with an acid such as acetic acid. The reaction products, including calcium in solution, are then treated with ammonia, producing ammonium pentaborate. The resulting composition is applied to the wood or other cellulose products by methods such as pressure, diffusion, or immersion and/or dipping treatment. The products have superior leach resistance to water when compared to conventional treatment compounds.
Claims18
A method for treating wood and cellulose materials to improve the properties of said materials, said properties including one or more of flame retardancy, insecticidal properties and fungicidal properties, said method comprising the steps of:
- providing a composition comprising ammonium pentaborate as a first component and one or more soluble calcium compounds as a second component, said components being derived from the reaction a calcium-containing borate ore with an organic acid selected from the group consisting of acetic acid and formic acid, to produce a calcium acid salt and boric acid in solution, and treatment of the calcium acid salt and boric acid solution with sufficient ammonia to form a solution having a pH of about 5-9, said solution including said first and second components;
- and applying said components to said materials.
A method for preparing boron compounds having flame retardant, insecticidal and fungicidal properties, the method comprising of the steps of:
- providing a calcium borate ore;
- mixing a sufficient amount of an organic acid selected from the group consisting of acetic acid and formic acid, with said calcium borate ore in a reaction vessel to dissolve substantially all of said ore and produce a calcium acid salt and boric acid in solution;
- and adding sufficient ammonia to provide a reaction mixture having a pH of about 5-9.
Dependencies are inferred from the claim text.