公开(公告)号：US3656901A

公开(公告)日：1972-04-18

申请号：US3656901D

申请日：1967-08-30

Applicant: OWENS ILLINOIS INC

Inventor： KUMMERLE HERMAN FRED

IPC: B01J2/08 ,  B01J21/00 ,  B01J21/08 ,  C01B33/16 ,  B01J11/44

CPC classification number: C01B33/166 ,  B01J2/08 ,  B01J21/00 ,  B01J21/08

Abstract: Silica particles, e.g., in bead form, are prepared from an alkali-metal (preferably sodium) silicate in an aqueous-organic reaction medium at ambient (preferably) or higher temperature and at a pH within the range of from 4.5 to 10. The organic (preferably recoverable organic) medium is critical and has a specifically defined bead-making capability. It provides a dispersed phase in which a silica ''''hydrosol'''' derived from an alkali-metal silicate is soluble and wherein it can polymerize to yield gelled particles of silica. Examples of operative organic media are n-hexylamine, 2ethylhexylamine, 2-methyl-5-ethylpyridine, n-hexyl Carbitol and n-hexyl Cellosolve. Organic media found to be inoperative are 2methyl-1-pentanol, 1-hexanol, 5-ethylbutanol and n-butanol. Descriptions are given of the two different types of silica products that are obtained; also, details of operating conditions and factors that influence the type of silica particles that result. The silica products are useful as, for example, catalysts and catalyst supports, and in other applications wherein silica in particulate form is employed.

Abstract translation: 二氧化硅颗粒，例如珠粒形式，在环境温度（优选）或更高的温度下，pH在4.5至10的范围内，由含水 - 有机反应介质中的碱金属（优选钠）硅酸盐制备。 有机（优选可回收的有机）介质是关键的并且具有明确的珠粒制备能力。 它提供了一种分散相，其中衍生自碱金属硅酸盐的二氧化硅“水溶胶”是可溶的，并且其中它可以聚合以产生硅胶的凝胶颗粒。