A method of purifying bodies of water in the preferred embodiment of which a reservoir of purified water is prepared from a natural body of water by constructing a prefiltering levee through the water to segregate the reservoir area from the remainder of the water body, pumping water from the reservoir area into the remainder, cleaning the floor of the reservoir area if necessary, installing a water purification unit in the reservoir, and then allowing the water to filter through the levee from ...

The purification of N-substituted aminobenzaldehydes, such as p-dimethylaminobenzaldehyde, is facilitated via the use of stripping agents.

The purification of bis(4-hydroxycyclohexyl) alkane, particularly hydrogenated bisphenol A (HBPA) is carried out via recrystallization from at least one halogen-containing solvent solution.

A purification assembly (10) includes a block (20) and a purification element (40) disposed in the block (20). The block (20) includes first (50) and second (60) pieces attachable to each other and has first (22) and second (24) flow paths. The block (20) also includes a cavity (30) defined by the first (50) and second (60) pieces and disposed in the first (22) flow path. The purification element (40) is disposed in the cavity (30) and in the first fluid flow path (22), wherein fluid flowing thr...

The present invention relates to a method of purifying a protein of interest from its fusion analog, comprising obtaining a protein solution comprising a protein of interest and its fusion analog; adjusting the pH and/or ionic strength of the protein solution with an appropriate buffer for use with a Hydrophobic Charge Induction Chromatograph (HCIC) resin, contacting the protein solution and HCIC resin column to allow binding of the protein of interest and its fusion analog, washing the resin an...

A process for removing high boilers from crude caprolactam which comprises high boilers, caprolactam and in some cases low boilers, and which has been obtained by a) reacting 6-aminocapronitrile with water to give a reaction mixture b) removing ammonia and unconverted water from the reaction mixture to obtain crude caprolactam, which comprises c) feeding the crude caprolactam to a distillation apparatus to obtain a first substream via the top as a product and a second substream via the bottom, b...

Isolated cinacalcet carbamate, processes for the preparation thereof, and processes for the use of cinacalcet carbamate as a reference marker and standard are provided. Also provided are cinacalcet salts substantially free of cinacalcet carbamate, and processes for the preparation thereof.

Compositions and methods are disclosed which facilitate purification of oligomers and other compounds. The disclosed compositions are silyl compositions that can be directly coupled, or coupled through a linking group, to a compound of interest, preferably to an oligomer at the end of oligomer synthesis. The silicon atom includes between one and three sidechains that function as capture tags. In one embodiment, the capture tags are lipophilic, which allows a derivatized oligomer to be separated ...

Highly pure aqueous solution of ammonia, typically electronics grade for use in semiconductor manufacturing is prepared by passing a solution of ammonia through at least one cation exchange resin bed to remove substantially all of the cation contaminants; subsequently passing the cation exchange resin effluent through at least one anion exchange resin; and recovering an aqueous solution of ammonia product substantially free of ionic contaminants.

The invention relates to a method of removing endotoxin from preparation of alpha-1-acid glycoprotein (orosomucoid) by contact with a finely divided non-toxic resin such as fumed silica. The invention also relates to a purification process for alpha-1-acid glycoprotein which includes this depyrogenation step, and to the depyrogenated product and its clinical uses.