Method for preparing heat-insulation mortar through organic silicone waste

Abstract

The invention discloses a method for preparing heat-insulation mortar through organic silicone waste. The method includes the following steps that (1) the organic silicone waste is converted into coarse SiO2 to serve as a skeleton of the heat-insulation mortar; (2) methyl stearate and ethyl stearate are mixed in a mixing kettle to synthesize a phase-change material; and (3) the coarse SiO2 and thephase-change material are mixed with the mass ratio being 1:(0.15 to 0.3), then a mixture and cement are blended with the mass ratio being 1:(8 to 12), and after even stirring, the heat-insulation mortar is prepared. Copper and silicon are removed through rotary kiln roasting, then a methyl chlorosilane mixed solution is converted into the coarse SiO2 to serve as aggregate in an oriented mode through a secondary combustion chamber, skeleton materials such as expanded vermiculite, expanded perlite, shale ceramisite, bentonite and montmorillonite conventionally applied in the current market arereplaced, the heat-insulation mortar is prepared by combining the phase-change material with the cement, thus economic benefits can be produced, and environmental pollution can further be reduced.

Description

technical field [0001] The invention relates to the technical field of organic silicon waste, in particular to a method for preparing thermal insulation mortar from organic silicon waste. Background technique [0002] In recent years, organic silicon products have been widely used in various fields of daily life, such as medical treatment, rubber, agriculture, and military affairs. The huge market of organic silicon industry in the field of chemical materials has prompted various organic silicon companies to expand their production scale one after another, resulting in a large amount of organic silicon slag Organosilicon slurry is the waste produced during the synthesis of organosilicon monomers, especially methylchlorosilane monomers, including slurry and waste liquid (mixed liquid of methylchlorosilane). The slurry mainly contains a large amount of High boilers, azeotropes and a small amount of fluidized bed bring out impurities such as unreacted silicon powder, copper pow...

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Problems solved by technology

[0002] In recent years, organic silicon products have been widely used in various fields of daily life, such as medical treatment, rubber, agriculture, and military affairs. The huge market of organic silicon industry in the field of chemical materials has prompted various organic silicon companies to expand their production scale one after another, resulting in a large amount of organic silicon slag Organosilicon slurry is the waste produced during the synthesis of organosilicon monomers, especially methylchlorosilane monomers, including slurry and waste liquid (mixed liquid of methylchlorosilane). The slurry mainly contains a large amount of High boilers, azeotropes and a small amount of fluidized bed bring out impurities such as unreacted silicon powder, copper powder and zinc powder, which are easy to burn and form acid mist when exposed to the air. The mixture of methyl chlorosilane is organosilicon methyl The waste liquid remaining in the rectification and separation section of the monomer synthesis liquid, the specific components include monomethyltrichlorosilane, silicon tetrachloride, trimethylchlorosilane, chlorosilane low boilers, chlorosilane high boilers, etc.; At present, the production units in the industry all treat it as hazardous waste. Generally, the substances with lower boiling points are recovered, and the waste residue is directly discharged into water for hydrolysis. This treatment method will cause a lot of waste of effective resources, and there are certain safety hazards. At present, There is no comprehensive utilization case of organic silicon slurry in the industry

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