Changzhou University

Weiyou Zhou

Qun Chen

Mingyang He

Fu'an Sun

Zhonghua Sun

Xuan Dai

Junfeng Qian

Shengchun Chen

Zenan Ji

A ternary composite catalyst of diethylzinc and yttrium trifluoroacetate loaded on chitin for copolymerization of carbon dioxide, epoxy cyclohexane and ethylene oxide is provided. The ternary composite catalyst exhibits strong catalytic activity for the ternary copolymerization of carbon dioxide, cyclohexane oxide and ethylene oxide. A high molecular weight and content of ester chain is maintained. Conventional rare earth ternary catalysts leave residues in the polymer, and the polymer requires rinsing with hydrochloric acid. The ternary composite catalyst can be removed through filtration. The average molecular weight of the resulting polycarbonate is more than 100,000, and the ester chain content is more than 90%. The resulting polymer has a lower metal content. The ternary composite catalyst can be used in agricultural film, disposable packaging and other polymer materials.

Catalyst for copolymerization of carbon dioxide and epoxy and method of manufacturing the same

The present disclosure relates to a process for acid-catalyzed decomposition of aryl &#x3b1;-hydroperoxide with a continuous flow tubular reactor. The process is a novel process performed in a tubular reactor, taking the aryl &#x3b1;-hydroperoxide such as cumene hydroperoxide (CHP) as a raw material and taking acids as a catalyst, performing acid-catalyzed decomposition of the aryl &#x3b1;-hydroperoxide solution in a short reaction time ranging from tens of seconds to several minutes, thereby obtaining the phenols; wherein an inert component may be filled in the reactor, so that the effects of heat transmission and mass transfer can be enhanced. The aryl &#x3b1;-hydroperoxide and acid are respectively introduced by a metering pump into a mixing module to be mixed, and then enter the tubular reactor to be reacted so as to produce the products such as phenols.

Process for acid-catalyzed decomposition of aryl &#x3b1;-hydroperoxide with continuous flow tubular reactor

The present invention relates to the technical field of peroxide decomposition, and discloses a method for preparing phenol, which comprises the following steps: (1) mixing cumene hydroperoxide and liquid acid or solid acid with a solvent to form a homogeneous solution or uniformly dispersed system; (2) loading the homogeneous solution or uniformly dispersed system of cumene hydroperoxide with a homogeneous solution or uniformly dispersed system of acid into a preheating module and preheating in a micro-channel continuous flow mode, preliminarily mixing the preheated materials for reaction in a mixing module in a micro-channel continuous flow mode, and then further mixing the materials for reaction in a series of mixing and reaction module groups in a micro-channel continuous flow mode, to obtain phenol. The method provided in the present invention is easy, simple and safe to operate, can implement continuous production of phenol product at a high yield ratio; in addition, since the reaction in the present invention is a cracking reaction, which releases heat strongly, the safety factor of the process is significantly improved owing to the strong heat release characteristic in conjunction with the unique heat transfer property of the micro-channels. With the method provided in the present invention, the yield of the product is higher than 99%.

Method for preparing phenol

Growing community of inventors

Changzhou, China

Weiyou Zhou