(US4933314-A)      A C- based molecular sieve is formed from random bonded carbonaceous spheres with a dia. of 0.8-120 microns. Continuous pathways run randomly between the spheres. The pathways having an average dia. of 0.1-20 microns. A number of the spheres have micropores which correct with the pathways. The micropores have an average dia. up to 10 Angstroms with a vol. of 0.1-0.7 cc/g. The overall structure has a density of 0.7-1.2 g/cc and a C content of at least 85%.    ADVANTAGE -   The action can provide a selective molecular sieve effect to e.g. provide enriched O2 or N2 streams from air. @(13pp)    (US5059578-A)      Process comprises: (i) preparing a mixt. of (A) finely divided thermosetting phenol resin satisfying: a) fine powder of phenol resin has spherical particles of dia. 1-150 microns, b) min 50 wt.%. (a) can pass through a 100 Tyler mesh sieve, c) IR absorption (KBr tablet) formulae D900-1015/D1600 = 0.2-9.0 (I) and D890/D1600 = 0.09-1.0 (II) are satisfied.    In the formulae (D1600 = absorption intensity of peak at 1600cm-1, D900-1015 = absorption intensity of largest peak in range, etc.), and d) solubility of (A) is max. 50 wt.% in methanol under reflux; (B) soln. of phenol or melamine thermosetting resin; and (C) a polymer binder i.e. PVA or water-soluble (or swellable) cellulose derivs.; (ii) moulding the mixt. into a shaped particulate object; and (iii) heating at 500-1100 deg.C in non-oxidising atmos. to form prod..    Mixt. contains 5-50 pts.wt. (B) and 1-30 pts.wt. (C) w.r.t. 100 pts.wt. finely divided resin.    USE/ADVANTAGE -   In prodn. of molecular sieving C comprising 0.8-120 micron dia. carbonaceous spheres bonded in 3-D with continuous 0.1-20 micron random passages, etc. For sepn. and purificn. of mixed gases. @(13pp)    (DE3872273-G)      A C molecular sieve (I) contains at least 85 wt.% C and has a structure in which spherical carbonaceous particles of dia. 0.8-120 (pref. 2-80) micrometres overlap and coalesce 3-dimensiona    (JP94020546-B2)      The carbon has a structure in which a large number of globular carbon grain of grain dia. 0.8-120 microns are piled up and united three dimensionally and irregularly. Between the carbon grains, continuous passages run three dimensionally and irregularly. Each of the carbon grains has pores which lead into the passage. The mol. sieve carbon contains at least 85 wt.% carbon.    In prodn. homogeneous mixt. of (A), (B) and (C), is prepd. The homogeneous mixt. is moulded to granular matter. The granular matter is heated at 500-1,00 deg.C under non-oxidn. atmos., and carbonised granular matter i.e. mol. sieve carbon is produced. (A) 100 pts.wt. thermosetting phenol resin fine powder. The powder comprises globular prim. grain of phenol resin of grain dia. 1-150 microns, or the prim. grain and the sec. aggregate. At least 50 wt.% of the whole grain is possible to pass 100 Taylor mesh sieve. In the ir spectrum (KBr tablet method), the powder satisfies (I) and (II).    D900-1015/D 0.2-9.0 (I) D890/D1600 = 0.09-1.0 (II)    (D1600 = absorption strength of the peak at 1600 cm-1, D900-1050 = absorption strength of the biggest peak in 900-1015 cm-1, D890 = absorption strength of the peak at 890 cm-1). Also, the solubility of the powder to methanol under reflux is up to 50 wt.%. (B) 5-50 pts.wt. (as the solid part) soln. of thermosetting resin (phenol or melamine resin). (C) 1-30 pts.wt. high mol. binder which is of PVA and water-soluble or water-swelling cellulose deriv.    USE/ADVANTAGE -   By mol. sieve effect of fine pores, the carbon is used for sepn. or purificn. of mixed gas. (J01061306-A)