32results about How to "Reduce one-time investment costs" patented technology

The invention discloses a production technology of dimethyl carbonate. The production technology comprises the steps of enabling methanol to react with propyl carbon in presence of a catalyst-sodium methylate in a reactive distillation tower so as to generate dimethyl carbonate; enabling the light component product-dimethyl carbonate generated in the reaction and the raw material-methanol to form an azeotrope on the top of the tower, enabling the formed azeotrope to enter an emptying balance pipe arranged on the top of the tower, and carrying out deep condensation on the azeotrope formed by the dimethyl carbonate and the methanol so as to enable the azeotrope to be completely changed into a liquid phase from a gas phase; after the deep condensation is finished, introducing the azeotrope into a T4 feeding tank at the height of +10m or above from a frame at the height of +42m or above so as to form jetted self-priming, and enabling the pressure of the top of the T1 tower to be changed into a negative pressure state. According to the technology provided by the invention, the pressure of the top of the T1 tower is changed into a negative pressure state from normal pressure, components of a material on the top of the T1 tower are changed, and the content of dimethyl ester is increased to 38% from the original 30%, so that the yield of dimethyl ester products is improved; furthermore, because of the increment of the yield, the energy consumption is certainly reduced, and the one-time investment cost for equipment is lowered.