Abstract: A process for separating mixtures containing components of at least two different molecular diameters, molecular weights or molecular shapes by passage of such mixture through a carbonaceous molecular sieve substrate which is selected from carbon sieves, calcined char and calcined agglomerated char such as coconut, peach pits, walnut shells, babassu nut shells and cherry pits, oxidized and devolatized agglomerated coal and calcined agglomerated coal impregnated with an organic polymer having a molecular weight of at least 400 or an inorganic polymer.

Abstract: The present invention relates to a process for separating mixtures of gases or liquids containing at least two different molecular characteristics which comprise passing the liquid or gas through a carbon molecular sieve prepared from a naturally occurring substrate and selected from the group consisting of molecular sieves having:a. an oxygen diffusivity of 800.times.10.sup.-8 cm.sup.2 /sec or less and a diffusivity ratio of oxygen to nitrogen of 15 to 100;b. an oxygen diffusivity of 600.times.10.sup.-8 cm.sup.2 /sec or less and a diffusivity ratio of oxygen to nitrogen greater than 100; andc. an oxygen diffusivity greater than 800.times.10.sup.-8 cm.sup.2 /sec and a diffusivity ratio of oxygen to nitrogen greater than 5;where the diffusivity is measured using a starting gas pressure of one atmosphere (+/-5%) at a temperature of 25.degree. +/-5% for 30 seconds.

Abstract: The instant invention is directed to a process for the continuous manufacturing of carbon molecular sieves having average effective pore diameters of from 2 to 15 Angstroms which comprises continuously feeding a charred naturally occurring substrate to a means for heating said substrate and heating said substrate under non-activation conditions, without the use of an externally added pore blocking substance, at a temperature range of about 900.degree. F. (482.degree. C.) to 2000.degree. F. (1093.degree. C.) for a time period of about 5 to 90 minutes.The instant invention is also directed to a carbon molecular sieve, useful for separating gas or liquid mixtures containing components of at least two different molecular diameters, molecular weights or molecular shapes which has the following physical characteristics:(a) an apparent density of from 0.60 to 0.70 g/cc,(b) an oxygen diffusivity (X 10.sup.-8) of from 500 to 900 cm.sup.2 /sec,(c) an oxygen/nitrogen selectivity ratio of from 5.0 to 8.

Abstract: The instant invention is directed to a process for the continuous manufacturing of carbon molecular sieves having average effective pore diameters of from 2 to 15 Angstroms which comprises continuously feeding a charred naturally occurring substrate to a means for heating said substrate and heating said substrate under non-activation conditions, without the use of an externally added pore blocking substance, at a temperature range of about 900.degree. F. (482.degree. C.) to 2000.degree. F. (1093.degree. C.) for a time period of about 5 to 90 minutes.The instant invention is also directed to a carbon molecular sieve, useful for separating gas or liquid mixtures containing components of at least two different molecular diameters, molecular weights or molecular shapes which has the following physical characteristics:(a) an apparent density of from 0.60 to 0.70 g/cc,(b) an oxygen diffusivity (.times.10.sup.-8) of from 500 to 900 cm.sup.2 /sec,(c) an oxygen/nitrogen selectivity ratio of from 5.0 to 8.

Abstract: The instant invention is directed to a molecular sieve comprising a carbonaceous substrate selected from the group consisting of molecular sieve carbon, calcined coconut char, oxidized and devolatilized agglomerated coal, calcined agglomerated coal and calcined agglomerated coconut char, impregnated with an organic polymer having a molecular weight of at least 400, as determined by vapor phase osmometry, or with an inorganic polymer at a dosage of at least 0.001 weight percent (based on the substrate weight) up to a maximum dosage which still allows the resulting sieve to separate gas or liquid mixtures containing components of at least two different molecular diameters, molecular weights or molecular shapes.The instant invention is also directed to a process for preparing the molecular sieve and to a process for using it to separate gas or liquid mixtures.

Abstract: The instant invention is directed to carbon molecular sieves which are capable of separating gas or liquid mixtures containing components of at least two different molecular diameters, molecular weights or molecular shapes, said molecular sieve having an average effective pore diameter of from about 3 to about 20 Angstroms and having specified oxygen diffusivities and selectivity ratios.The instant invention is also directed to a process for preparing carbon molecular sieves having average effective pore diameters of from about 3 to about 20 Angstroms which comprises continuously feeding an agglomerated naturally occurring substrate to a continuous transport type heating means and calcining said agglomerated substrate in a substantially oxygen-free environment under a cocurrent purge of an inert gas at a temperature range of about 250.degree. to 1100.degree. C. for at least 1 minute.