Aga Aktiebolag

Rotem Industries, Ltd.

Carbon Membranes Ltd.

Other

University Patents, Inc.

State of Israel, Israel Atomic Energy Commission

Abraham Soffer

Haim Cohen

Jack Gilron

Shlomo Saguee

Dan Golub

Moshe Azariah

Yoram Oren

Moshe Hassid

Refael Hed-Ofek

Rafael Hed-Ofek

Jacob E Koresh

Haim Tobias

Shlomo Saggy

Abraham Amar

A process for manufacturing a bundle of hollow carbon membranes comprising the steps of: (a) providing a bundle of hollow cellulose fibers; (b) removing substantially all the absorbed water from the said fibers; (c) heating the fibers to a range of temperatures where it pyrolyzes; (d) supplying to the said fibers, during at least part of the heating thereof and after the water has been removed, a catalytically effective amount of a gaseous catalyst selected from among Lewis acids, and ionic salts that are at least partially volatile at the pyrolysis temperature range.

Process for the production of hollow carbon fiber membranes

Separation of linear from branched hydrocarbons using a carbon membrane

A process for manufacturing carbon membranes having controlled pore sizes comprises the steps of: a) causing a stream of a pyrolysable carbon-containing gas to come into contact with a carbon membrane having a pore size and/or distribution larger than the desired pore size and/or distribution; b) raising the ambient temperature of the said membrane to or above the temperatures at which the adsorbed carbon-containing gas pyrolyzes; and c) substantially purging the atmosphere surrounding the membrane from carbon-containing gas.

Method of improving the selectivity of carbon membranes by chemical

A method for separating gases with enhanced selectivity comprises causing a mixture of gases to be separated to flow through a molecular sieving membrane (MSM), at cryogenic temperatures.

Method for the separation of gases at low temperatures

A method of selective clogging of failed hollow fibers of a membrane module, including a pack or bundle of fibers in a shell-side and bore-side arrangement which includes failed fibers and non-failed fibers, comprises the steps of: clogging bores of all of the fiber at one end of the pack or bundle of the fibers; substantially evacuating the membrane module both at the shell-side and at the bore-side; filling the bore-side and the shell-side with a non-permeant gas; subsequently-holding the membrane module vertically, disconnecting the bore-side of the membrane module from a supply of the non-permeant gas and dipping another end of the membrane module opposite to the clogged end into a reservoir containing a liquid sealant; applying a reduced pressure to the shell-side for a period of time sufficient to permit suction of sealant into the bores of the failed fibers through a failure of which vacuum is applied to the bore-side; allowing the sealant to solidify at least partially to clog the bores of both the failed fibers and the non-failed fibers; and cutting off a length of the bundle of the fibers such that the bores of the non-failed fibers are exposed while the bores of the failed fibers remain clogged.

Selective clogging of failed fibers

An electrochemical filter which consists of a fibrous electrically conducting material to which there are bonded microscopic particles of carbon or active charcoal. A variety of fibers can be used: carbon fibers, graphite fibers, fibers of inert metal etc. A process for the production of such filters where the particles are bonded to the fibers by a pyrolyzable binder which is pyrolyzed. Electrochemical separation and filter devices based on such filter media.

Optimized multiporous carbon bed for electrochemical filters

There are provided carbon membranes for use in separation processes. These have a very narrow range of pore sizes, with a very sharp cutoff at the upper pore size, and thus they are suited for the separation of various constituents which differ but little in their size. The membranes can be of a varied configuration: sheet form, tubular form, assymetrical membranes and the like. There is provided a process for the production of such membranes by controlled pyrolysis of a carbon containing percursor material.

Separation device

High energy output primary and secondary electrochemical cells are disclosed as having a light metal anode such as lithium metal, a cathode and a non-aqueous electrolyte comprising an aprotic solvent having dissolved therein an electrically conductive salt and a macroheterocyclic compound complexed with the cation moiety of the salt.

Electrochemical cells with non-aqueous electrolytes containing

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Arad, Israel

Abraham Soffer