阅读说明：本技术 含有二氧化硅杂化材料的固体强酸复合材料及其制备方法 (Solid strong acid composite material containing silicon dioxide hybrid material and preparation method thereof ) 是由 王浩霖 于 2019-08-31 设计创作，主要内容包括：本发明属于固体强酸的技术领域,公开了含有二氧化硅杂化材料的固体强酸复合材料及其制备方法。该固体强酸复合材料具有酸性高,最有可能代替传统的强酸催化剂。该固体强酸复合材料pH<1,制作工艺简单,价格低廉,环保型固体强酸。(the invention belongs to the technical field of solid strong acid, and discloses a solid strong acid composite material containing a silicon dioxide hybrid material and a preparation method thereof. The solid strong acid composite material has high acidity and is most likely to replace the traditional strong acid catalyst. The solid strong acid composite material has the pH value of less than 1, simple preparation process, low cost and environment-friendly solid strong acid.)

1. The solid strong acid composite material containing the silicon dioxide hybrid material is characterized in that a sol-gel carrier formed by phosphate and silica sol is dried and soaked in acid solutions such as sulfuric acid, phosphoric acid and the like to form the solid strong acid composite material.

2. The solid strong acid material according to claim 1, wherein the silica sol is combined with a phosphate salt to form a solid acid support by a sol-gel process.

3. The preparation method of the solid strong acid composite material containing the silicon dioxide hybrid material is characterized by comprising the following steps:

Taking silica sol, stirring, adding phosphate, stirring for 5-30 minutes to form sol gel, naturally drying, and drying at 200 ℃ to obtain a carrier;

And soaking the dried carrier in an acid solution, taking out the carrier after 3 hours, and drying the carrier at 200 ℃ to obtain the composite solid strong acid.

4. The method of preparing a solid strong acid composite material according to claim 3, wherein the silica sol material and the phosphate form a solid support for the gel.

Technical Field

The invention relates to the technical field of solid strong acid, in particular to a solid strong acid composite material containing a silicon dioxide hybrid material and a preparation method thereof.

Background

sulfuric acid, phosphoric acid and the like, which are strong acids as industrial catalysts, have problems of severe corrosion of equipment, long reaction time, severe pollution and the like. Solid strong acid is the most possible material for replacing the traditional strong acid industrial catalyst, is a research hotspot in the years, mainly has the advantages of easy recovery and reutilization of the solid strong acid, reduction of subsequent treatment steps, cost saving, high environmental protection value and low price.

The solid strong acid is an environment-friendly novel material for replacing traditional industrial catalysts such as sulfuric acid, phosphoric acid and the like, has been explored by researchers in hot fields for many years, but has little breakthrough progress. The composite material synthesized by the sol-gel method has strong solid acid and acidity, is easy to recover and reuse, has environmental protection and low price, and can replace the traditional strong acid industrial catalyst. In conclusion, the novel solid strong acid composite material provided by the inventor has important significance.

disclosure of Invention

In order to solve the pollution problem of the traditional industrial strong acid catalyst in the prior art, the invention provides a silicon dioxide hybrid composite solid acid material. In order to solve the technical problems, the invention adopts the following technical scheme:

A solid strong acid composite material containing a silicon dioxide hybrid material is prepared by drying and soaking a sol-gel carrier formed by phosphate and silica sol in acid solutions such as sulfuric acid, phosphoric acid and the like to form the solid strong acid composite material.

The solid strong acid composite material containing the silicon dioxide hybrid material has the advantages of a strong acid catalyst, overcomes the problems of difficult recovery and serious pollution of the traditional strong acid, and is a novel environment-friendly solid strong acid catalyst which is hopeful, efficient and easy to recover. The invention relates to a solid strong acid composite material which adopts a silicon dioxide hybrid material, and the solid strong acid composite material has the advantages that phosphate can form sol gel with silica sol, the acidity is very strong after loading acid, the pH value of the surface of the solid strong acid is less than 1, the solid strong acid composite material has the function of replacing the traditional strong acid, and the solid strong acid composite material is solid, so the solid strong acid composite material is easy to recover compared with the traditional strong acid, and has the characteristics of high environmental protection value, reusability, low price and the like.

The invention also provides a preparation method of the solid strong acid composite material containing the silicon dioxide hybrid material, which comprises the following steps:

(1) Taking silica sol, stirring, adding phosphate, stirring for 5-30 minutes to form sol gel, naturally drying, and drying at 200 ℃ to obtain a carrier;

(2) And soaking the dried carrier in an acid solution, taking out the carrier after 3 hours, and drying the carrier at 200 ℃ to obtain the composite solid strong acid.

The invention adopts silicon dioxide and phosphate to form sol gel, the composite carrier obtained by drying has strong thermal stability, and then the composite carrier is soaked in acid solution to react with acid to form composite solid acid with strong acidity.

Detailed Description

The invention discloses a solid strong acid composite material containing a silicon dioxide hybrid material and a preparation method thereof, and a person skilled in the art can appropriately improve process parameters by referring to the content. It is expressly intended that all such similar substitutes and modifications which would be obvious to those skilled in the art are deemed to be included in the invention. While the methods and applications of this invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the methods and applications described herein, as well as other suitable variations and combinations, may be made to implement and use the techniques of this invention without departing from the spirit and scope of the invention.