Beijing University of Chemical Tehcnology

Juhua Group Co., Ltd

Zhejiang University

Zhejiang Nhu Company Ltd.

Wanhua Chemical (ningbo) Co., Ltd.

Zhejiang Quhua Fluor-chemistry Co Ltd

Ningbo Wanhua Polyurethanes Co., Ltd.

Zhejiang Quzhou Jusu Chemical Industry Co.,ltd

Nanomaterials Technology Pte Ltd, Singapore

Quzhou Juhua Polyamide Fibre Llc.

Wanhua Chemical Co., Ltd.

Guangwen Chu

Jianfeng Chen

Haikui Zou

Yong Luo

Baochang Sun

Liangliang Zhang

Yong Cai

Weiqi Hua

Hongke Zhang

Jiansheng Ding

Zhigang Shen

Limin Xu

Shuchang Sun

Pengyuan Zhang

Wei Liu

Di Wang

Zhirong Chen

Hong Yin

Xiaolin Liu

Hong Mei Zhao

Dan Qiu

Zhihao Li

Lifang Shi

Xiaogao Liu

Zhigang Wu

Jiandong Li

Yunfei Yu

Lei Shao

Bo Yang

Liyang Zhou

Jimmy Sunglai Yun

Yanzhen Lu

Jinyuan Lin

Yang Xiang

Yidong Zhang

Jihong Tong

Jiangyong Hong

Bibo Xia

Wei Mao

Yanchun Zheng

Yutu Jiang

Zhenhua Zhao

Yachao Liu

The present application provides a hydrophilic and hydrophobic composite packing-based rotating packed bed and a system. A hydrophobic packing and a hydrophilic packing are formed into a composite packing. When said packing cuts liquid, the hydrophobic packing can sufficiently disperse the liquid so as to make the dispersion of the liquid in the packing zone more uniform, and the wettability of the hydrophilic packing allows the liquid to spread sufficiently so as to increase the wetting efficiency of said packing. The phenomenon of droplet aggregation caused to liquid in a single hydrophobic packing zone and the phenomenon of reduction of liquid turbulence caused to liquid in a single hydrophilic packing zone can be avoided. Therefore, applying a hydrophilic and hydrophobic composite packing to a rotating packed bed can further improve the mass transfer and mixing performance thereof.

Hydrophilic and hydrophobic composite packing-based rotating packed bed and system

The present application provides a continuous preparation system and method for vinylidene chloride. In the present application, by coupling two stages of high gravity reactors, the product vinylidene chloride and water vapor are distilled from a reaction system in form of an azeotrope by adopting a water vapor steam stripping method, and the product obtained using the method has high purity. In addition, by combining steam stripping and high gravity, trichloroethane and alkali solution are rapidly mixed for mass transfer, and the product vinylidene chloride is rapidly distilled from the reaction system in form of the azeotrope (based on rapid diffusion of water vapor), such that the reaction proceeds continuously towards the direction of producing vinylidene chloride, thus significantly improving the conversion rate. As proved by a test apparatus, the present application can stabilize the purity of the vinylidene chloride product at 98% or more (mass fraction), decrease the TOC value of chloride salt wastewater to 100 mg/L or less, and decrease the consumption of materials and the cost of subsequent salt-containing wastewater treatment.

Continuous preparation system and method for vinylidene chloride

A system and method for preparing epoxy chloropropane is provided in that by coupling three stages of high gravity reactors, the product epoxy chloropropane and water vapor are distilled from a reaction system in form of an azeotrope by adopting a water vapor steam stripping method. Further, by combining the azeotrope with the multiples stages of high gravity reactors, the gas phase mass transfer and the liquid phase mass transfer of the azeotrope are improved aiming at the features of the azeotrope in the reaction system, thus making the overall conversion rate higher. In addition, by combining steam stripping and high gravity, dichloropropanol and alkali solution are rapidly mixed for mass transfer, and the product epoxy chloropropane is rapidly distilled from the reaction system in the form of the azeotrope, such that the reaction proceeds continuously towards the direction of producing epoxy chloropropane, thus significantly improving the conversion rate.

System and method for preparing epoxy chloropropane

The present application provides a high-gravity device for generating nano/micron bubble and a reaction system. In the device, the liquid phase is continuous phase and the gas phase is dispersed phase. A gas enters the interior of the device from a hollow shaft, and the gas is subjected to primary shearing under a shearing effect of aerating micropores to form bubbles; then, the bubbles rapidly disengage from the surface of a rotating shaft under the effect of the rotating shaft rotating at a high speed, and are subjected to secondary shearing under the high-gravity environment with the strong shearing force formed by the rotating shaft to form nano/micron bubbles. The device has the advantages of fastness, stability, and small average particle size. The average particle size of the formed nano/micron bubbles is between 800 nanometers and 50 microns, and the average particle size of the bubbles can be regulated in a range by adjusting the rotating speed of the rotating shaft.

High-gravity device for generating nano/micron bubbles and reaction system

A reaction apparatus used for a continuous reaction process for the preparation of trifluoroethane includes a housing, a rotary cutting component, a submersible pump and a flow deflector. The flow deflector includes two sets of flow-deflecting plates, each set of said flow-deflecting plates including a plurality of flow-deflecting plates. Two sets of flow-deflecting plates are fixed to each of the two opposing side walls, and the two adjacent flow-deflecting plates are in offset alignment. The submersible pump is arranged inside the reaction chamber body. A liquid inlet line can connect a directly to the submersible pump without requiring the arrangement of an additional pipeline.

System, method, and reaction apparatus used for continuous reaction process for preparation of trifluoroethane

Provided are a gas phase oxidation/decomposition and absorption integrated device and application thereof in a gas-liquid system. The device comprises a housing (), a motor (), and a boost regulator (); the housing () is internally provided with a rotating chamber () and a discharge chamber (); the rotating chamber () comprises a rotating shaft (), a turntable (), a liquid distributor (), packing layers (), a guiding round table (), a liquid inlet (), a liquid outlet (), and a first gas outlet (); the discharge chamber () is located under the rotating chamber () and comprises a discharge chamber housing () and a plasma generator.

Gas-phase oxidation/decomposition and absorption integrated device and application thereof

Disclosed are a system device for preparing an alkylate oil using a sulfuric acid catalyst and a manufacturing method thereof. The system device comprises a reactor unit (), a catalyst and hydrocarbon circulation unit (), a separator unit (), an isobutane circulation unit () and a fractionator unit (). The reactor unit () is connected and in communication with the catalyst and hydrocarbon circulation unit () and the separator unit () via channels respectively. The catalyst and hydrocarbon circulation unit () is connected and in communication with the separator unit () via channels. The separator unit () is connected and in communication with the isobutane circulation unit () and the fractionator unit () via channels respectively. The catalyst and hydrocarbon circulation unit (), the separator unit (), the isobutane circulation unit () and the fractionator unit () are connected and in communication with the reactor unit () via channels respectively. The reactor unit () comprises at least a high gravity reactor. Due to the adopted high gravity reactor capable of highly reinforcing the mixing of materials under high viscosity, the system device can operate at a low temperature of &#x2212;5&#xb0; C. and prepare the alkylate oil having an octane number of 97-100 at an alkane/alkene ratio of 2-100.

System and producing method for preparing alkylated oil by using sulfuric acid as catalyst

A high-gravity rotating bed device, including a motor, a rotor and a housing. The rotor and the motor are entirely arranged within the housing. A load-bearing plate is provided within the housing. The load-bearing plate divides the housing into a reaction chamber and a balance chamber. The motor is arranged within the balance chamber. A transmission shaft of the motor passes through the load-bearing plate and is fixedly connected to the rotor arranged within the reaction chamber. A gas inlet, a gas outlet, a liquid inlet and a liquid outlet are arranged on the housing. An externally communicating pipeline is arranged on the balance chamber. Also disclosed is an application of the present high-gravity rotating bed device under high-pressure conditions in operations such as mixing, transferring and reacting.

High-gravity rotating bed device having new structure and application thereof

The invention relates to a method of circular use of waste brine produced in the manufacture process of MDI, comprising the following steps: (1) the waste brine produced in the manufacture process of MDI is subjected to a high-gravity extraction and then to a column extraction, wherein said waste brine contains aniline, diaminodiphenylmethane and polyamine; (2) the waste brine from step (1) is transmitted to a stripping tower for steam stripping; (3) the waste brine from the stripping tower of step (2) and a chemical oxidant are transmitted to an oxidation reactor to which air is blown for aeration; (4) the waste brine after the treatment of step (3) is transmitted to an absorption tower for absorption. The invention makes the salt water have TOC of less than 8 ppm and TN of less than 2.5 ppm and achieves regeneration of resources in the waste brine such as sodium chloride and water and the like for circular use.

Method for treating waste saline water produced in production process of diphenylmethane diisocyanate (MDI)

A microchannel double pipe device comprises a channel for inner nozzle (), a channel for outer nozzle () and a mechanical probe (). The channel for outer nozzle () concentrically surrounds the channel for inner nozzle (), and the channel for inner nozzle () concentrically surrounds the mechanical probe (). Constricted at the outlet of the channel for inner nozzle (), the channel for inner nozzle () extends to form an inner nozzle core (). Constricted at the outlet of the channel for outer nozzle (), the channel for outer nozzle () extends to form an outer nozzle core (). The outer nozzle core () essentially concentrically surrounds the inner nozzle core (), and the outlets of the inner nozzle core () and the outer nozzle core () are at the same level essentially. The mechanical probe () is configured to intermittently empty the inner nozzle core (). The device can be used for microcosmic mixing and reaction, especially suitable for continuous preparation of inorganic, organic or medicine particles with nanostructure or micron-structure using liquid-liquid precipitation method.

Microchannel double pipe device and usage thereof

The invention relates to a process for the preparation of fine barium titanate (BaTiO) powders. The process comprises introducing an aqueous solution (I) containing salts of barium and titanium, and an aqueous basic solution (II) containing an inorganic or organic base separately and simultaneously into a high-gravity reactor with the high-gravity level of 1.25G to 12,500G and performing the reaction of the solution (I) with the solution (II) at a temperature of from 60 to 100&#xb0; C. The solution (I) is preheated to a temperature ranging from 60&#xb0; C. to 65&#xb0; C. and the solution (II) is preheated to a temperature ranging from 60&#xb0; C. to 100&#xb0; C. respectively prior to the reaction, in which the Ba/Ti molar ratio in the solution (I) is more than 1 and the concentration of the base in the solution (II) is such that the reaction mixture is maintained at a constant OHconcentration, preferably a pH value of about 14. The reaction product is separated by filtering and washed with deionized water to remove the impurity ions and excessive barium ions, and then dried to obtain BaTiOpowders. Said powders consist essentially of crystalline, primary particles having a uniform particle size ranging from 5 to 200 nm, an approximately spherical morphology and a high sintering activity.

High-gravity reactive precipitation process for the preparation of barium titanate powders

A method of preparing nano-dispersed high-all-trans-carotenoid microcapsules is provided, comprising: preparing 10-20% carotenoid suspension by milling the high-all trans-carotenoid crystals with dichloromethane until the particle size thereof is in the range of 2-5 &#x3bc;m, then supplying the suspension together with preheated dichloromethane of another pass into a dissolving tank to obtain a solution of 0.5-2%; delivering the solution together with ethanol or isopropanol into a crystallization device having high gravity rotating packed bed simultaneously and continuously, and then into a wiped-film evaporator for desolvation until the solid content is 10-20%, then a transparent alcohol dispersion of carotenoid is obtained; mashing the alcohol dispersion together with an aqueous solution containing an antioxidant and protective colloid and spray drying to obtain nano-dispersed high-all-trans-carotenoid microcapsules. As the crystals are nano-dispersed and the content of trans-isomer is more than 90%, the carotenoid microcapsules of present inventions exhibit high bioavailability.

Method of preparing nano-dispersed high-all-trans-carotenoid microcapsules

The present invention provides a method of preparing polymethylene-polyphenyl-polyamine (briefly referred to as polyamine, DAM), in which a high gravity rotating bed is used as the mixing reactor of formaldehyde and aniline hydrochloride, the mixing solution of aniline hydrochloride and circulation solution and the formaldehyde are fed into the high gravity rotating bed reactor proportionally to carry out mixing and condensation reaction under a condition of a very high gravity; the materials leaving the high gravity rotating bed reactor is introduced into a stirred vessel to proceed with the pre-condensation reaction and obtain a condensation solution; and the process steps of heating, molecular rearrangement, neutralization, water washing and purification, etc. are completed to obtain the refined DAM. With the method according to the present invention, the main by-products is obviously reduced in the condensation process, the phenomenon of deposit attaching to the inner walls of circulation pipes and heat exchanger and blockage are prevented in the condensation process, the impurity content is low in the refined DAM, and the subsequent product MDI has a lighter color, the product quality is stable and may be improved to a certain extent.

Method of preparing polymethylene-polyphenyl-polyamine

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Beijing, China

Guangwen Chu