Method for hydrolyzing dimethyldichlorosilane in saturated acid

The invention relates to a hydrolysis technology of methyl chlorosilane, in particular to a technology for hydrolyzing dimethyldichlorosilane in saturated acid and preparing high cyclosiloxane and hydrolysate with low chloride ions. The technology is characterized by comprising the following steps: mixing vaporized dimethyldichlorosilane with concentrated hydrochloric acid to perform hydrolysis reaction, sending the reaction solution to a phase separator for separation, using the separated crude hydrolysate and concentrated hydrochloric acid to perform hydrolysis reaction again, sending the reaction solution to the phase separator to separate hydrolysate and acid solution, washing the hydrolysate with water, sending the hydrolysate to the phase separator to separate polydimethylsiloxane and acid solution, sending the concentrated hydrochloric acid separated through the first hydrolysis separation to a liquid membrane reactor to separate hydrogen chloride gas, and sending concentrated hydrochloric acid back to