38results about How to "Enables continuous synthesis" patented technology

The invention discloses a method for synthesizing γ-butyrolactone containing a spirocyclic 1,3-indanedione structure by using a microchannel reaction device, which comprises the following steps: (1) 2-benzylidene-1,3 Indanediones and cyclo(sub)isopropyl malonate are dissolved in an organic solvent to make a homogeneous solution A; (2) catalysts and oxidants are dissolved in an organic solvent to make a homogeneous solution B; (3) The homogeneous solution A and the homogeneous solution B are respectively simultaneously pumped into the micro-mixer in the microchannel reaction device, and after mixing, they are passed into the micro-reactor for reaction; (4) the effluent of the micro-reactor is collected to obtain final product. Compared with the prior art, the present invention uses 2-benzylidene-1,3-indandione compounds as substrates for the first time to prepare new gamma-butyrolactone containing spiro ring 1,3-indandione structure, The method avoids the use of acidic raw materials and expensive metals, and the non-metallic catalyst used also has excellent catalytic performance.

The invention belongs to the technical field of chemistry, and particularly relates to a treatment method of β-alanine by-products; first, the production waste liquid and ammonia water containing 3,3-iminodipropionate sodium are passed into a microchannel reactor respectively, and the Continuous reaction at 180-210°C for 10-30 minutes, followed by deamination, dehydration and drying treatment to obtain sodium β-alanine; the method provided by the invention has low treatment cost and high resource utilization rate.

The invention discloses a continuous synthesis method of a graphene / ferrite nanocomposite. According to the synthesis method, the graphene / ferrite nanocomposite is prepared by taking graphene, sodium hydroxide aqueous solution and ferric salt solution or ferric salt solution doped with nickel salt and zinc salt and adopting a reverse co-precipitation method. By adopting the synthesis method, continuous synthesis of the nanocomposite is realized by continuous material injection and continuous magnetic separation and output of products, obtained ferrite and graphene are mixed evenly and are combined firmly, and an excellent absorbing property is achieved. Therefore the synthesis method has the advantages of continuous synthesis capability, low synthesis temperature, low energy consumption, low cost and quantity production capability, and has better application prospect.

The invention relates to a sedimentation type self-propagating aluminum nitride preparation method. The method comprises the steps of introducing aluminum powder into a sedimentation type reactor furnace body from a solid material inlet; introducing nitrogen into the furnace body through a gas inlet; triggering a self-propagating reaction between the aluminum powder and the nitrogen in the furnacebody in order to generate aluminum nitride; settling the aluminum nitride to the bottom of the furnace body and then discharging the aluminum nitride through a discharge hole. The sedimentation typeself-propagating aluminum nitride synthesis method can realize the continuous synthesis of aluminum nitride and is particularly efficient and capable of saving energy for the preparation of aluminum nitride.

The invention discloses a magnesium-silicide spiral cooling device. The magnesium-silicide spiral cooling device comprises a motor, a cooler and a spiral propeller arranged in the cooler, wherein the spiral propeller mainly comprises a hollow shaft and spiral blades arranged on the hollow shaft; a cooling water introduction pipe is arranged in the hollow shaft; a cooling water return channel is formed in a gap between the inner wall of the hollow shaft and the outer wall of the cooling water introduction pipe; the first end of the cooling water return channel is connected with a cooling waterdelivery pipe; and a front end cylinder, a multi-level cooling water jacket and a tail end cylinder are arranged outside the cooler from the second end to the first end of the cooler in turn. The magnesium-silicide spiral cooling device has the advantages that: due to the combination of the spiral propeller and the cooler, continuous cooling of high-temperature magnesium silicide powder can be realized, and continuous synthesis of magnesium silicide is facilitated; and the high-temperature magnesium silicide powder moves forward with the turnover of the spiral propeller, and therefore the heat transfer is enhanced, the cooling of the magnesium silicide powder is uniform, the cooling rate is stable and a mild expansion condition is provided so as to ensure the reaction activity of the magnesium silicide and prevent the cooled magnesium silicide from caking.