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Found results for
 patents
1.
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METHOD FOR PREPARING KEY INTERMEDIATE OF EPOXY RESIN
| Application Number |
CN2019101296 |
| Publication Number |
2020/082863 |
| Status |
In Force |
| Filing Date |
2019-08-19 |
| Publication Date |
2020-04-30 |
| Owner |
- JIANGSU YANGNONG CHEMICAL GROUP CO., LTD. (China)
- JIANGSU RUIXIANG CHEMICAL CO., LTD. (China)
- JIANGSU RUIHENG NEW MATERIAL TECHNOLOGY CO., LTD. (China)
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| Inventor |
- Sun, Cheng
- Xu, Lin
- Ding, Kehong
- Wang, Yiming
- Huang, Jiejun
- Li, Ming
- Ma, Qingyan
- Lv, Li
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Abstract
Disclosed is a method for preparing a key intermediate of an epoxy resin. The preparation method comprises: placing 3-chloropropene, a heteropolyacid catalyst and a nitrogen-containing heterocyclic compound in an autoclave, stirring same and heating same to 60ºC-65ºC, wherein the system pressure is 0.2 MPa-0.24 MPa, and then injecting hydrogen peroxide at a constant speed to the autoclave for reaction so as to obtain the key intermediate of the epoxy resin. The method inhibits the production of dichloropropanol during a reaction, reduces the probability of hydrolysis of epichlorohydrin, and improves the reaction selectivity to 99.5%.
IPC Classes ?
- C07D 301/12 - Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with hydrogen peroxide or inorganic peroxides or peracids
- C07D 301/36 - Use of additives, e.g. for stabilisation
- C07D 303/08 - Compounds containing oxirane rings with hydrocarbon radicals, substituted by halogen atoms, nitro radicals or nitroso radicals
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2.
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PROCESS FOR PREPARING EPICHLOROHYDRIN BY MEANS OF DIRECT EPOXIDATION OF CHLOROPROPENE, MODIFIED HETEROPOLYACID IMMOBILIZED CATALYST AND PREPARATION METHOD THEREFOR
| Application Number |
CN2019080417 |
| Publication Number |
2019/196681 |
| Status |
In Force |
| Filing Date |
2019-03-29 |
| Publication Date |
2019-10-17 |
| Owner |
- JIANGSU YANGNONG CHEMICAL GROUP CO., LTD. (China)
- JIANGSU RUIXIANG CHEMICAL CO., LTD. (China)
- JIANGSU RUIHENG NEW MATERIAL TECHNOLOGY CO., LTD. (China)
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| Inventor |
- Huang, Jiejun
- Xu, Lin
- Ding, Kehong
- Gu, Xianjian
- Xu, Zhibin
- Xu, Wenxuan
- Zhang, Xiaoyu
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Abstract
Disclosed in the present invention is a process for preparing epichlorohydrin by means of the direct epoxidation of chloropropene, a modified heteropolyacid immobilized catalyst and a preparation method therefor; specifically, disclosed is a process route for preparing epichlorohydrin by means of the direct epoxidation of chloropropene in the presence of a modified heteropolyacid immobilized catalyst by using hydrogen peroxide as an oxygen source. The main advantages of the process are: ① the ratio of chloropropene to hydrogen peroxide is low, and the amount of chloropropene is small; ② reaction and separation processes are coupled to save equipment, and the process is simple; ③ a side reaction of hydrolysis between epichlorohydrin and water under acidic conditions is prevented, and the yield and selectivity of epichlorohydrin are high.
IPC Classes ?
- C07D 301/12 - Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with hydrogen peroxide or inorganic peroxides or peracids
- C07D 303/08 - Compounds containing oxirane rings with hydrocarbon radicals, substituted by halogen atoms, nitro radicals or nitroso radicals
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