Membrane Technology and Research, Inc

U.S. Environmental Protection Agency

Other

The United States of America As Represented by the Administrator of the U.S. Environmental Protection Agency

United States Environmental Protection Agency

The United States of America As Represented by the Admin. of Environmental Prot. Agcy

Leland Morris Vane

Franklin R Alvarez

Richard W Baker

Ravi Ponangi

Yu Huang

Ramin Daniels

Alvin Ng

Jennifer Ly

Anurag P Mairal

Tiem Aldajani

Vasudevan Namboodiri

Jennifer H Ly

An improved process for separation of liquid mixtures involves vapor stripping followed by mechanical compression of the vapor which is then exposed to a permeation membrane for separation of the compressed vapor. The apparatus for separating a liquid mixture of two or more solvents comprises components a stripping column, at least one over-head compressor and, thereafter, at least one selectively permeable membrane wherein the membrane separates the components of the vapor based on the different sorption and diffusion characteristics.

Liquid separation by membrane assisted vapor stripping process

Processes for removing water from organic solvents, such as ethanol. The processes include distillation to form a rectified overhead vapor, compression of the rectified vapor, and treatment of the compressed vapor by two sequential membrane separation steps.

Membrane augmented distillation to separate solvents from water

Processes for removing water from organic solvents, such as ethanol. The processes include distillation in two columns operated at sequentially higher pressure, followed by treatment of the overhead vapor by one or two membrane separation steps.

Membrane-augmented distillation with compression to separate solvents from water

Hydrophilic cross-linked polymeric membranes, when prepared according to the process of the present invention, are unique in character in as much as the steady state permeability of the membrane has been altered by blending and cross-linking polyalkyl amines and polyalcohols. To obtain desired results, the compositions must contain at least 10% polyalkyl amines, with preferred amounts of polyalkyl amines in the composition being in excess of 40%, with over 50% polyalkyl amine concentration by weight.

Hydrophilic cross-linked polymeric membranes and sorbents

Polymer-ceramic mixed matrix compositions contain one or more organic polymers and a nano-sized dispersion of inorganic metal oxide particles which are dispersed throughout the composition. Materials have use in making membranes that act as transfer agents.

Hydrophilic mixed matrix material having reversible water absorbing properties

Hydrophilic mixed matrix materials having reversible water absorbing properties

A process for treating liquids containing organic compounds and water. The process includes a pervaporation step in conjunction with a dephlegmation step to treat at least a portion of the permeate vapor from the pervaporation step. The process yields a membrane residue stream, a stream enriched in the more volatile component (usually the organic) as the overhead stream from the dephlegmator and a condensate stream enriched in the less volatile component (usually the water) as a bottoms stream from the dephlegmator. Any of these may be the principal product of the process. The membrane separation step may also be performed in the vapor phase, or by membrane distillation.

Separation process using pervaporation and dephlegmation

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Cincinnati, OH, United States of America

Leland Morris Vane