Nanjing Yanchang Reaction Technology Research Institute Co., Ltd.

Nanjing University

Nanjing Institute of Microinterface Technology Co., Ltd

Weimin Meng

Zhibing Zhang

Lei Li

Zheng Zhou

Gaodong Yang

Feng Zhang

Baorong Wang

Guoqiang Yang

Hongzhou Tian

Yu Cao

Huaxun Luo

Jia Liu

Yue Dai

Guannan Wang

Jiao Geng

The invention provides a built-in micro-interface oxidation system for preparing terephthalic acid from p-xylene. The oxidation system includes a first reactor, a rectifying tower and a second reactor which are sequentially connected. A first outlet is disposed on a side wall of the first reactor; a first inlet is disposed on a side wall of the second reactor; a material inlet is disposed on a side wall of the rectifying tower; and a material outlet is disposed at a bottom of the rectifying tower. The first outlet is connected with the material inlet of the rectifying tower; the first inlet is connected with the material outlet of the rectifying tower. Micro-interface units are arranged in the first reactor and the second reactor for dispersing and crushing air into bubbles. Through disposing micro-interface units in reactors, problems of high energy consumption, high raw material consumption and low reaction efficiency are solved.

Built-in micro-interface oxidation system and method for preparing terephthalic acid from p-xylene

The invention discloses a micro-interface strengthening reaction system for preparing poly-α-olefin, which includes: a first polymerization reactor and a second polymerization reactor that are connected with each other in sequence, wherein a first micro-interface generator is disposed outside the first polymerization reactor, and a second micro-interface generator is disposed inside the second polymerization reactor. A bottom of the second polymerization reactor is provided with a discharge port, and the discharge port is connected with a hydrogen halide removal tower. By disposing the first micro-interface generator in the first polymerization reactor while disposing the second micro-interface generator in the second polymerization reactor, on the one hand it increases the mass transfer area between the gas phase and the liquid phase material, improves reaction efficiency and reduces energy consumption, and on the other hand it results in a higher evenness of the poly-α-olefin and improved product quality.

Micro-interface strengthening reaction system and method for preparing poly-α-olefin

The invention provides a micro-interface enhanced oxidation system and an oxidation method for preparing hydrogen peroxide, wherein the micro-interface enhanced oxidation system includes: an oxidation reactor, wherein a top portion of a side surface is provided with a liquid phase pipeline for delivering hydrogenated anthraquinone, and a bottom portion of the side surface is provided with a gas phase pipeline for delivering air; and a liquid distributor, a packing section, a seal pan and a hybrid micro-interface unit that are arranged in order from top to bottom are arranged in the oxidation reactor, wherein the hybrid micro-interface unit comprises a upper-mounted micro-interface generator and a lower-mounted micro-interface generator that are communicated with each other up and down, and the hydrogenated anthraquinone delivered in goes down in turn until being mixed with the air in the hybrid micro-interfacial unit to be dispersed and crushed after being distributed through the liquid distributor.

Micro-interface enhanced oxidation system and oxidation method for preparing hydrogen peroxide

The invention provides a reaction system for preparing butyraldehyde by propylene carbonylation, comprising: a reactor; a side wall of the reactor is sequentially provided with a catalyst inlet, a propylene inlet and a synthesis gas inlet from top to bottom; the bottom of the reactor is provided with a solvent inlet; two micro-interface generators are arranged inside of the reactor from top to bottom, and the micro-interface generator located at a top end is connected to the propylene inlet to break the propylene gas into micron-scale micro-bubbles; the micro-interface generator located at a bottom is connected to the synthesis gas inlet for breaking the synthesis gas into micron-scale micro-bubbles; the outlets of the two micro-interface generators are opposite, and the outlets are connected with a gas distributor for evenly distributing raw materials. The reaction system of the present invention has low energy consumption, low cost, high safety, low reaction temperature and low reaction pressure, few side reactions and high yield of n-butyraldehyde, which is worthy of wide popularization and application.

Reaction system and method for preparing butyraldehyde by propylene carbonylation

A treatment system and method for cephalosporin wastewater are disclosed. The treatment system includes: a flocculation and sedimentation device, an alkali reaction tank, a PAC reaction tank, a PAM reaction tank, a wastewater heat exchanger, a wastewater heater and an oxidation reactor that are connected with each other in sequence, wherein the wastewater heat exchanger is provided with a material inlet, a material outlet, a heat source inlet and a heat source outlet. An oxidized water from the oxidation reactor enters the wastewater heat exchanger from the heat source inlet, the heat source outlet is connected with a product canister, the product canister is connected with a membrane filtration device to realize concentration treatment of a landfill leachate, the material inlet is connected with the PAM reaction tank, and the material outlet is connected with the wastewater heater. An outer side of the oxidation reactor is provided with a micro-interfacial generation system for dispersing and breaking a gas into bubbles. The treatment system of the prevent invention improves the contact of reaction phase interfaces after arranging the micro-interfacial generation system, which ensures a good wastewater treatment effect under relatively mild operating conditions.

Treatment system for cephalosporin wastewater and treatment method thereof

A built-in micro interfacial enhanced reaction system and process for PTA production with PX are provided. The system includes a reactor and a micro interfacial unit disposed inside reactor. The reactor includes a shell, an inner cylinder concentrically disposed inside shell, and a circulating heat exchange device partially disposed outside shell, inner cylinder having a bottom end connected to inner bottom surface of the shell in closed manner and an open top end, a region between shell and inner cylinder being first reaction zone, inner cylinder containing second reaction zone and third reaction zone from top to bottom, circulating heat exchange device being connected to inner cylinder and micro interfacial unit respectively. The invention can solve problems of large waste of reaction solvent acetic acid under high temperature and high pressure and being unable to take out the product TA in time during existing process of PTA production with PX.

Built-in micro interfacial enhanced reaction system and process for PTA production with PX

A strengthening oxidation system of the external micro-interfacial unit for producing PTA with PX is provided, including: a reactor, a circulating heat exchange device and a micro-interfacial unit. The reactor includes an outer casing and an inner cylinder disposed concentrically inside the outer casing. The circulating heat exchange device is disposed at an exterior of the reactor, and is connected with the outer casing and the inner cylinder respectively, for regulating reaction temperatures of the first reaction zone, the second reaction zone and the third reaction zone inside the reactor in a reaction process of producing PTA with PX. the micro-interfacial unit is connected between the reactor and the circulating heat exchange device, and connected with an external feed pipe of the reactor, for crushing a gas phase material into micro bubbles with a diameter greater than or equal to 1 &#x3bc;m and less than 1 mm and for mixing the micro bubbles with a liquid phase material to form an emulsion at the exterior of the reactor before a reaction material enters each of the reaction zones inside the reactor.

Strengthening oxidation system of external micro-interfacial unit for producing PTA with PX

A submerged propylene hydration micro-interface strengthening reaction system and a method are proposed. The system includes a reactor, a first micro-interface generator and a second micro-interface generator. Through the micro-interface generators, the propylene is broken to form micron-scale bubbles, which are mixed with reactants and deionized water to form a gas-liquid emulsion, so as to increase a phase boundary area between gas and liquid phases, and achieve a strengthening mass transfer effect under a lower preset operating condition. The micro-scale bubbles can be fully mixed with the deionized water to from a gas-liquid emulsion. By fully mixing gas and liquid phases, it can ensure that the deionized water in the system is in full contact with propylene, and they are fully in contact with the catalyst, which effectively improves the efficiency of preparing isopropanol.

Submerged propylene hydration micro-interface strengthening reaction system and method thereof

A micro-interface strengthening reaction system and method for preparing polyethylene by using a solution process are provided. The system includes a pre-polymerization reactor and a polymerization reactor connected in sequence. The pre-polymerization reactor is provided with a pre-polymerization micro-interface generators, and the polymerization reactor is provided with a micro-interface generator. The system further includes a desolvation tower for removing solvents and impurities from the polyethylene product. A polyethylene inlet is disposed at a middle part of the desolvation tower, and the polyethylene inlet is connected with the flash tank bottom outlet. A nitrogen micro-interface generator for dispersing and breaking high-temperature nitrogen into micro-bubbles is disposed within the desolvation tower. Through installing the micro-interface generators on the pre-polymerization reactor and the micro-interface and on the polymerization reactor, the mass transfer area between gas phase and liquid phase is increased, the reaction efficiency is improved, and energy consumption is reduced.

Micro-interface strengthening reaction system and method for preparing polyethylene by using a solution process

A benzene selective hydrogenation reaction system and a method are provided. The system includes a benzene refiner, a first hydrogenation reactor, a second hydrogenation reactor and a separator which are connected in sequence. The first hydrogenation reactor is provided with a first inlet and a first outlet, and the second hydrogenation reactor is provided with a second inlet and a second outlet. The first inlet is connected to the discharge port of the benzene refiner; the first outlet is connected to the second inlet; the second outlet is connected to the separator. The catalyst outlet is connected to the first hydrogenation reactor for recycling the catalyst into the first hydrogenation reactor. Two micro-interface units are respectively disposed within the first hydrogenation reactor and the second hydrogenation reactor, and the micro-interface units are used for dispersing and breaking hydrogen into micro-bubbles with a micron-scale diameter.

Benzene selective hydrogenation reaction system and method thereof

The invention provides a treatment system and a treatment method for PMIDA high-salinity wastewater. The treatment system includes a booster pump, a water inlet-outlet heat exchanger, a water inlet heater and an oxidation reactor, and the water inlet-outlet heat exchanger is provided with a wastewater inlet, a wastewater outlet, an oxidized water inlet, and an oxidized water outlet. An oxidized water from the oxidation reactor enters the water inlet-outlet heat exchanger through the oxidized water inlet, the oxidized water outlet is connected to an intermediate tank, the wastewater inlet is connected to the booster pump, and the wastewater outlet is connected to a wastewater heater. A micro-interface unit is disposed at the lower part in the oxidation reactor, for dispersing crushed gas into bubbles. A gas inlet is formed at a side wall of the oxidation reactor and is connected to the micro-interface unit through a pipeline.

Treatment system for PMIDA wastewater

The present invention relates to a micro-interface strengthening reaction system and method for heavy oil hydrogenation preparation of ship fuel, including a liquid phase feed unit, a gas phase feed unit, a micro-interface generator, a fixed-bed reactor and a separation tank. The present invention may reduce the pressure during the reaction by 10-80% while ensuring the efficiency of the reaction by breaking the gas to form micro-sized micro-bubbles and making the micro-bubbles mix with heavy oil to form an emulsion to increase the area between the gas and the liquid phase and to achieve the effect of enhancing mass transfer in a lower preset range. And, the present invention greatly enhances the mass transfer, so that the gas-liquid ratio can be greatly reduced. Also, the method of the present invention has low process severity, high production safety, low product cost per ton, and strong market competitiveness.

Micro-interface strengthening reaction system and method for preparing ship fuel

A built-in micro-interface papermaking wastewater treatment system and a treatment method are provided in the present invention. The treatment system includes a papermaking wastewater tank, a grid cleaner, an adjustment tank, a centrifugal filter and a sedimentation tank which are connected in sequence, and further includes a heat exchanger, a preheater, a wet oxidation reactor, a gas-liquid separator and a biodegradation tank. A micro-interface unit for dispersing and crushing gas into gas bubbles is disposed inside the wet oxidation reactor. The micro-interface unit includes a pneumatic micro-interface generator, a gas inlet is disposed at a side wall of the wet oxidation reactor, and the gas inlet extends to an interior of the pneumatic micro-interface generator through a pipeline. By arranging the micro-interface unit inside the wet oxidation reactor of the treatment system, the consumption of air or oxygen can be reduced, which realizes low energy consumption and high treatment efficiency.

Built-in micro-interface papermaking wastewater treatment system and wastewater treatment method thereof

A green treatment process for cleaning exhaust gas generated in the air oxidation of benzene homologs is disclosed. It takes the hot pressurized exhaust gas generated in the benzene homolog air oxidation process as driving power and heating source: firstly, introducing the said exhaust gas into a turbine refrigerator so that it can drive the refrigerator to generate the cooling capacity that will be utilized for condensing the gas phase in the upper part of the flash evaporator and for trapping organics entrained in the exhaust gas; then, leading the exhaust gas with lowered temperature and pressure into corresponding heat exchangers to provide a part of heating source for the flash evaporator and to preheat the reaction raw materials. Furthermore, introducing the condensed exhaust gas into a water absorption scrubber for further removal of trace organics entrained therein.

Green treatment process for cleaning exhaust gas generated in air oxidation of benzene homologs

A multiphase catalytic tower-shaped impinging-stream reactor in the form of a tower, the upper part of which is a plate or packed towerand the lower part of which is a multiphase catalytic impinging-stream reaction kettlethe upper part and the lower part are separated by a flow channel platewhich has a plurality of round holes serving as flow channelsat the top of the reaction kettleexists an upper ejectorand at the bottom of the reaction kettleexists a lower ejectornear to the side wall of the reaction kettlestands a baffle plate, which separates a static liquid zone within the reaction kettleis disclosed.

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Nanjing, China

Weimin Meng