40results about How to "Promote positive response" patented technology

The invention provides a synthetic gas fluidized bed methanol production process based on interstage absorption and separation. The reaction system is composed of a methanol fixed bed pre-reactor and a two-stage or multi-stage methanol fluidized bed reactor in series. The converted CO / H 2 The 1:2 purified syngas passes through the methanol fixed-bed pre-reactor and then enters the first-stage methanol fluidized-bed reactor with heat extraction pipes, part of CO and / H 2 With the fine powder methanol catalyst at 200-280℃ and 3.0-7.0Mpa, the homogeneous methanol synthesis reaction occurs through the heat exchange of the heat pipe. After the product gas is passed through the gas-solid separator to remove the catalyst, it is cooled by a water cooler and enters the methanol absorption and separation tower. ; After demethanolization, the product gas enters the methanol fluidized bed reactor with heat pipes at subsequent stages, and repeats the above process; finally, part of the separated tail gas is held and partly pressurized and returned as a raw material for synthesis gas; the upper part of the absorption tower is rich in methanol The absorption liquid is depressurized and flashed to recover methanol, which is used as an absorbent in the lower section of the tower to absorb methanol and remove fine powder; methanol is removed from the bottom of the tower and collected to remove impurities before entering the rectification system.

The invention discloses an intermittent reaction-continuous reaction rectification combined process for catalytic synthesis of oxalic acid. The process particularly comprises the following steps: (1) continuously feeding materials into a reactive dividing-wall rectification tower in a double batch reactor switching mode; (2) enabling dimethyl oxalate and water to enter a batch reactor to react primarily, wherein the equilibrium conversion rate reaches 50%-60%; and (3) continuously feeding reaction solution into a left-side reaction section ( zone b) of the reactive dividing-wall rectification tower from an upper feeding opening, continuously feeding normal-temperature water into the reactive dividing-wall rectification tower from a lower feeding opening of the zone b, and continuously discharging methyl alcohol produced in the reaction process from the tower top, wherein due to the discharging of methyl alcohol, the reaction proceeds to production of oxalic acid until dimethyl oxalate is completely hydrolyzed and the conversion rate can reach 99.5% or above. By virtue of the reactive dividing-wall rectification tower, the synthesis reaction and product separation and purification are implemented in the same tower, the existing process flow is simplified, and energy consumption and investment can be lowered. The intermittent reaction-continuous reaction rectification combined process for catalytic synthesis of oxalic acid has the characteristics of no addition of extra additives, high reaction speed, high conversion rate, low water-ester ratio, simple product separation operation, low energy consumption and the like.

The invention discloses a method and device for increasing the desulfurization reaction rate of ore pulp by using a surfactant. The method includes the following steps: S1. Prepare phosphate rock pulp with a liquid-solid ratio of 30-50%, and uniformly mix surface active S2, uniformly mix the flue gas to be desulfurized with oxygen, fully mix the mixed gas with the absorption slurry obtained in step S1 for reaction, and discharge the treated flue gas outside. The present invention utilizes phosphate rock slurry mixed with surfactants for flue gas desulfurization, which can reduce drag in turbulent flow and reduce SO 2 Absorption of mass transfer resistance, and enhance the suspension of pulp, thereby promoting the reaction, thereby significantly improving the desulfurization reaction rate and desulfurization efficiency. The treatment device of the invention has the advantages of quick response, automatic slag discharge function, no influence on flue gas treatment, convenient operation and high efficiency.