Novel B type large-pore volume silica gel and manufacture method thereof

Abstract

The invention provides a novel B type large-pore volume silica gel and a manufacture method of the novel B type large-pore volume silica gel. The manufacture method comprises the following steps of A, generating orthosilicic acid in a vortex type mixing reactor through sodium silicate solution and diluted mineral acid according to the conventional silica gel technology, and then standing and curing, and granulating twice; B, heating and curing, transferring the silica gel in an environment at 40 to 90 DEG C for being retained for 8 to 24 hours; C, surfacing the washed silica gel through inorganic salt and inorganic base, wherein for modifying the internal silanol on the internal surface of the silica gel hole, the alkaline can be sodium hydroxide, potassium hydroxide and lithium hydrate; and the inorganic salt can be ammonium chloride, sodium chloride, sodium carbonate, sodium bicarbonate and ammonium bicarbonate; and D, reinforcing the framework through the technology of dipping mineral acid and inorganic salt and thermally processing. According to the manufacture method, the silica gel is transferred into 0.01 to 10% of inorganic salt solution for being heated in water bath, and then is parched in a thermal environment at 100 to 200 DEG C, thus obtaining the silica gel provided by the invention. The manufacture method provided by the invention is simple, and easy to achieve mass production.

Description

technical field [0001] The invention relates to a production of silica gel and a preparation method thereof, in particular to a novel B-type large-pore silica gel and a preparation method thereof. Background technique [0002] As a desiccant, silica gel has been widely used in industrial production, daily necessities, military moisture-proof and other fields. In recent years, with the advancement of science and technology and the innovation and development of industrial technology, new uses of silica gel have also been gradually developed. For example, pressure swing adsorption silica gel used in industrial gas separation, catalyst carrier silica gel for catalytic hydrogenation in petrochemical industry, column chromatography silica gel for separation and extraction of active components of Chinese herbal medicine, etc. The development of these new application fields has new requirements for the physical and chemical indicators of traditional silica gel. Silica gel is class...

AI Technical Summary

Problems solved by technology

The above technologies all focus on the research and development of the large pore size of silica gel, but ignore the silica gel with B-type pore size that plays an important role in the preparation of pure substances, catalyst carriers, separation and extraction of effective active components of Chinese herbal medicines, industry, and civil moisturizing and moisture resistance.

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