| 摘要 |
PCT No. PCT/GB86/00319 Sec. 371 Date Feb. 11, 1987 Sec. 102(e) Date Feb. 11, 1987 PCT Filed Jun. 5, 1986 PCT Pub. No. WO86/07345 PCT Pub. Date Dec. 18, 1986.A method of preparing spherical microparticles of silica comprising adding an acid solution to a silicate solution before or after addition of an alkali metal alginate, ammonium alginate, starch, gelatin, pectin or mixtures thereof. The microparticles can be used to prepare macroporous materials having a controlled pore structure. |
