Abstract: Methods for the purification of the macrolide moxidectin result in higher purity levels than can often otherwise be obtained. The crystalline moxidectin is then used in a wide variety of pharmaceutical and veterinary applications, including the prevention, treatment and control of parasites in plants, animals and humans.

Abstract: Methods for the purification of the macrolide moxidectin result in higher purity levels than can often otherwise be obtained. The crystalline moxidectin is then used in a wide variety of pharmaceutical and veterinary applications, including the prevention, treatment and control of parasites in plants, animals and humans.

Abstract: Methods for the purification of the macrolide moxidectin result in higher purity levels than can often otherwise be obtained. The crystalline moxidectin is then used in a wide variety of pharmaceutical and veterinary applications, including the prevention, treatment and control of parasites in plants, animals and humans.

Abstract: Methods for the purification of the macrolide moxidectin result in higher purity levels than can often otherwise be obtained. The crystalline moxidectin is then used in a wide variety of pharmaceutical and veterinary applications, including the prevention, treatment and control of parasites in plants, animals and humans.

Abstract: A method of producing a high purity silica powder which can be fused to form transparent, bubble-free particles. An ammonium fluosilicate solution is purified preliminarily by removing colloidal-sized silica onto which impurities in the solution have been adsorbed. The high purity powder is produced by ammoniation of an unsaturated aqueous solution of ammonium fluosilicate. Silica powder produced is filtered, washed, and dried before fusion. Additional pre-fusion treatments such as washing, hydrothermal leaching, calcination, and a combination thereof, may be utilized to ensure that the concentration of volatile material is low.

Abstract: The process of the present invention for preparing granules of alumina includes pretreating an alumina powder by admixing with cold water in a mixer at a temperature below room temperature, e.g., such as below about 20.degree. C., to form a pretreated alumina having a pore volume saturated with water and further having a surface area of gel structure, and agglomerating the pretreated alumina in a fluidized bed to form granules. The process is particularly suited to producing activated alumina in macroporous granules. The process in one aspect further includes a cold hopper for cooling alumina powder prior to the pretreating step.

Abstract: The process of the present invention for preparing granules of alumina includes pretreating an alumina powder by admixing with cold water in a mixer at a temperature below room temperature, e.g., such as below about 20.degree. C., to form a pretreated alumina having a pore volume saturated with water and further having a surface area of gel structure, and agglomerating the pretreated alumina in a fluidized bed to form granules sized in the range of about 1-3 mm. The process is particularly suited to producing activated alumina in macroporous granules. The process in one aspect further includes a cold hopper for cooling alumina powder prior to the pretreating step.