Zhejiang Nhu Company Ltd.

Zhejiang University

Zhejiang Nhu Special Materials Co., Ltd.

Shandong Nhu Pharmaceutical Co., Ltd.

Shangyu Nhu Biological Chemical Co., Ltd.

Shandong Nhu Amino Acid Co., Ltd.

Heilongjiang Nhu Biotechnology Company Ltd.

Qichuan Li

Baishan Hu

Zhirong Chen

Hong Yin

Haoran Li

Yong Wang

Guiyang Zhou

Dan Qiu

Shanjun Mao

Xiao Ma

Lili Yu

Ming Lian

Hangjun Deng

Woyuan Li

Zhe Wang

Yong Li

Lifang Shi

Jianyong Mao

Jiandong Li

Guisheng Qiu

Zhixuan Wang

Cong Chen

Xiaoxiao Wu

Wengang Hong

Zhaofeng Chen

Shenfeng Yuan

Xiongwei Zhang

Xuguang Li

Yi Min

Zhengjiang Wang

Guíyang Zhou

Bing Lu

Shuaifeng Pan

Jiang Zhao

Yunxuan Luo

Xiaoyong Zhu

Guangde Qin

Danqi Zhu

Jinyang Zhang

Yang Yao

Qian Luo

Shichun Tu

Qingai Shi

Qilei Zhang

Linpu Cai

Youmin Yang

The present disclosure discloses a semi-aromatic polyamide and a preparation method therefor. The semi-aromatic polyamide is obtained by polymerization reaction using a diamine, a dibasic acid and a monoacid as main raw materials while adding a special end-capping agent. The semi-aromatic polyamide prepared according to the present disclosure has good thermal stability, a yellowness index of less than 20, a glass transition temperature of 90° C. or above, and a melting point of 300° C. or above, and can be applied to spare parts for fuel pipelines in automobiles, and electronic and electrical industries such as LED panels.

Semi-aromatic polyamide resin and preparation method therefor

A preparation method of a polyphenylene sulfide resin, and a polyphenylene sulfide resin prepared by the method using a sulfur-containing compound, an alkaline substance and p-dichlorobenzene as raw materials, a fatty acid as a polycondensation aid to carry out a polycondensation reaction. After purification treatment, a primary polyphenylene sulfide is obtained, which then reacts with a terminal-group adjusting agent at a high temperature to generate the polyphenylene sulfide resin resulting in high yield and low cost. The prepared polyphenylene sulfide resin has high reactivity, high melting crystallization temperature and excellent thermal stability. The resulting polyphenylene sulfide resin can be directly used for extrusion and injection molding.

Preparation method of polyphenylene sulfide resin, and polyphenylene sulfide resin prepared thereby

The present application relates to a method for extracting coenzyme Q10 and a phospholipid from a coenzyme Q10 fermentation bacterium powder. The method is characterized in that the fermentation bacterium powder of a coenzyme Q10 production strain is subjected to extraction with a mixed solvent of which the three-dimensional Hansen solubility parameter is between 21 and 23 (J/cm)and the hydrogen bonding solubility parameter thereof is between 10 and 12 (J/cm). The present invention can efficiently extract two products, namely coenzyme Q10 and a phospholipid, from the coenzyme Q10 fermentation bacterium powder; the process thereof is highly operable, easy to be industrialized, and can provide a product with high purity and yield, having great economic benefit.

Method for extracting coenzyme Q10 and phospholipid from coenzyme Q10 fermentation bacterial powder

The present disclosure discloses a preparation method for 4-phenylthio-benzenethiol. The preparation method comprises the following steps: subjecting phenyl sulfide as a raw material to a halogenation reaction to obtain 4-halophenyl sulfide; subjecting the 4-halophenyl sulfide to a sulfhydrylation reaction to obtain a 4-phenylthio-phenylthiolate; and subjecting the 4-phenylthio-phenylthiolate to acidification. The preparation method of the present disclosure avoids the use of materials such as thiophenol which pollutes the environment, and realizes efficient recycling of the reaction materials, solvents, water and the like. The preparation method of the present disclosure is a green process for the synthesis of 4-phenylthio-phenylthiol without organic waste, waste acid and waste water discharge.

Preparation method for 4-phenylthio-benzenethiol

Provided by the present disclosure are a method and a device for preparing 2-hydroxy-4-methylthiobutyric acid and intermediates thereof; the intermediates for preparing 2-hydroxy-4-methylthiobutyric acid comprise 3-methylthiopropionaldehyde and 2-hydroxy-4-methylthiobutyronitrile. The method for preparing 2-hydroxy-4-methylthiobutyric acid provided by the present disclosure comprises: step (1), a step of reacting acrolein with methyl mercaptan to prepare 3-methylthiopropionaldehyde; step (2), a step of reacting 3-methylthiopropionaldehyde with hydrocyanic acid to prepare 2-hydroxy-4-methylthiobutyronitrile; and step (3), a step of hydrating 2-hydroxy-4-methylthiobutyronitrile by using sulfuric acid and then hydrolyzing to prepare 2-hydroxy-4-methylthiobutyric acid; wherein in steps (1), (2) and (3), the reaction status of the materials is detected online, and the proportions of the materials are controlled according to the detection results such that reactions are performed completely.

Method and device for preparing 2-hydroxy-4-methylthiobutyric acid and intermediates thereof

The present invention discloses a selective hydrogenation catalyst and a preparation method and an application thereof, belonging to the technical field of catalysts. The selective hydrogenation catalyst comprises an active component and a carrier for supporting the active component, wherein the active component is a transition metal particle, the carrier is modified by a flexible chain ligand in advance, one end of the flexible chain ligand is uniformly distributed on the surface of the carrier, and the other end of the flexible chain ligand is coordinated on a transition metal. When the catalyst is used for catalytic hydrogenation reaction of dehydrolinalool or 2-methyl-3-butyn-2-ol, the stability is good, the catalyst still has high selectivity after being used for a long time, and the quality of a hydrogenation product can be guaranteed.

Selective hydrogenation catalyst, preparation method and application thereof

The present disclosure belongs to the technical field of catalysis, and particularly relates to a metal oxide coated ceramic corrugated plate catalyst, its preparation method and application thereof in preparation of key intermediates of citral. The catalyst consists of a ceramic corrugated plate carrier and a metal oxide active layer coated on a surface of the carrier, wherein the metal oxide active layer is a metal oxide formed by active ingredient titanium and at least four other metal elements selected from vanadium, chromium, manganese, iron, zirconium, niobium and molybdenum.

Metal oxide coated ceramic corrugated plate catalyst, preparation and application in preparation of key intermediates of citral

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Zhejiang, China

Qichuan Li