Macroporous low-density blocky composite gel and production process thereof

The invention belongs to the technical field of silica gel, and particularly relates to macroporous low-density blocky composite gel and a production process thereof. Common silica gel products in the prior art comprise macroporous silica gel and fine-pored silica gel, and generally, high specific surface area and large pore volume performance are difficult to realize at the same time. In the water washing process, a pore-enlarging agent is added, high-temperature water washing is combined, and the product is further expanded. In the drying process, low-temperature drying is carried out, the drying time is prolonged, and pore enlarging is further carried out. The specific surface area and aperture of the silica gel product prepared by the process are obviously higher than those in the prior art. The preparation process method is mild in reaction condition and safe, simple and convenient in operation process. 本发明属于硅胶的技术领域，具体涉及一种大孔低密度块状复合凝胶及其生产工艺。现有技术中常见的硅胶产品包括大孔硅胶及细孔硅胶，通常难以满足高比表面积及大孔容性能的同时实现。本发明在水洗过程中，加入扩孔剂并高温