Compositions and methods used in the modification of crystallization of aluminum hydroxide from liquor in an aluminum hydroxide production process, such as the Bayer process. More particularly, crystal growth modifier compositions comprising a component of crude corn oil derived from a bioethanol production process and/or a component of biodiesel and methods of using such compositions to modify particle size and distribution of precipitated alumina trihydrate in a precipitation liquor crystallization process.

The present invention relates to methods for separating enantiomers of 5-phenyl and 5-naphthyl substituted 4-(aminomethyl)-6-(1-methyl-1H-pyrazol-4-yl)phthalazin-1(2H)-ones using N-Boc-L-phenylalanine, N-Boc-D-phenylalanine, and similar chiral acids.

In a crystallization method including forming a circulation path between a main reaction unit and a thickening reaction tank, and performing reaction crystallization, the circulation path includes an inflow path from the main reaction unit to the thickening reaction tank, and an outflow path from the thickening reaction tank to the main reaction unit, a stirring zone to which the inflow path and the outflow path are connected is provided in a lower portion of the thickening reaction tank, a clarification zone in which a supernatant is generated is provided in an upper portion of the thickening reaction tank, and a thickening zone in which particles are settled is provided between the stirring zone and the clarification zone.

Disclosed is a method for fast and cost-efficient preparation of ikaite crystals. The method comprises contacting an alkaline aqueous solution, which comprises carbonate and bicarbonate ions, with a water solution, which comprises Ca.sup.2+, at a temperature not exceeding 15 C., wherein contact between the alkaline aqueous solution and the water solution takes place at a permeable or porous surface, through which either solution is fed to the other at a flow rate facilitating formation of ikaite crystals. Also disclosed is system for carrying out the ikaite preparation process. The process and system provides a cost efficient and effective means for capture and storage of carbon dioxide.

The present invention includes compositions and methods for preparing micron-sized or submicron-sized particles by dissolving a water soluble effective ingredient in one or more solvents; spraying or dripping droplets solvent such that the effective ingredient is exposed to a vapor-liquid interface of less than 50, 100, 150, 200, 250, 200, 400 or 500 cm.sup.1 area/volume to, e.g., increase protein stability; and contacting the droplet with a freezing surface that has a temperature differential of at least 30 C. between the droplet and the surface, wherein the surface freezes the droplet into a thin film with a thickness of less than 500 micrometers and a surface area to volume between 25 to 500 cm.sup.1.

This invention provides a process for increasing the crystallinity of at least one solid material which is less than 100% crystalline, comprising contacting said solid material with solvent in which the solid material is insoluble or poorly soluble (a non-solvent); and applying ultrasound to the solid material when in contact with said non-solvent.

This invention provides a process for increasing the crystallinity of at least one solid material which is less than 100% crystalline, comprising contacting said solid material with solvent in which the solid material is insoluble or poorly soluble (a non-solvent); and applying ultrasound to the solid material when in contact with said non-solvent.

This disclosure relates to methods for crystallization of antibodies from cell-free culture supernatant.

Described is a device for inducing crystal nucleation in a crystallizer. The device comprises a vessel for fluid and a surface abrader, wherein the surface abrader is configured to abrade a surface within the vessel to induce crystal nucleation. The friction of the abrader against the surface within the vessel creates nano-sized particulates which induce crystal nucleation. Crystal growth can then take place in the crystallizer. Also described is a crystallization apparatus comprising the device and a crystallization process using the device or similar. The device is significantly cheaper and more reliable than known ultrasound devices and facilitates the separation of crystal nucleation and crystal growth. The device also enables the avoidance of the use of seeding as a source of secondary nucleation.

Provided is an industrially feasible method for separating tritiated water from light water.

The method comprises: a step of removing tritiated water and heavy water from light water by adding heavy water to a liquid mixture containing tritiated water and light water, by converting into a gas hydrate consisting essentially of tritiated water and heavy water as the crystal structure under a condition of converting into the gas hydrate of at least one of heavy water and tritiated water, and yet keeping light water in the liquid state, and a step of separating tritiated water from heavy water by breaking the gas hydrate structure containing tritiated water and heavy water, so as to get a liquid mixture, by converting the liquid mixture containing tritiated water and heavy water into a gas hydrate containing tritiated water in the crystal structure under a condition of converting into a gas hydrate containing tritiated water in the crystal structure and yet keeping heavy water in the liquid condition and then, by breaking the gas hydrate structure of tritiated water, so as to collecting tritiated water in that order.