- 2,4-dichlorobenzotrifluoride preparation method
-
The invention discloses a 2,4-dichlorobenzotrifluoridepreparation method, wherein the target compound is obtained by using 2,4-dichlorotoluene as a raw material and using a mixture of cuprous chlorideand copper powder as a catalyst through a two-step reaction of chlorination and fluorination. Compared with the method in the prior art, the method of the invention has the following advantages thatthe chlorination side reactions are less, the isomer of 2,4-dichlorobenzotrifluoride cannot be generated in the reaction process, the product purity is high, the raw material sources are wide, the catalyst is low in price and convenient to recover, the production cost of the target compound is reduced, the economic benefit is increased, and environment pollution cannot be generated.
- -
-
Paragraph 0010; 0020; 0023; 0027; 0031; 0035
(2020/01/14)
-
- Preparation method of 2,4-dichlorobenzoyl chloride
-
The invention provides a preparation method of 2,4-dichlorobenzoyl chloride, and relates to the technical field of fine chemical engineering organic synthesis. The method comprises the following steps: (1) performing chlorination on 2,4-dichlorotoluene and chlorine under the effect of catalyst azodiisobutyronitrile, thereby preparing 2,4-dichlorotrichloro toluene crude product; (2) performing hydrolysis reaction on the 2,4-dichlorotrichloro toluene crude product prepared in the step (1) and the water; (3) performing rectification under vacuum on the hydrolysis product in the step (2), collecting fraction at the region to prepare a target product 2,4-dichlorobenzoyl chloride. The process disclosed by the invention is easy to obtain raw material, low in price, simple in operation, low in energy consumption, high in product quality, low in production cost, and less in three-wastes; the total product yield is between 90%-95%, and the purity is 99% or more; the method is suitable for the industrial production, and has good application prospect.
- -
-
Paragraph 0031; 0032; 0035; 0036; 0039; 0040; 0043; 0044
(2019/05/08)
-
- Efficient chlorination process of 2,4-dichlorobenzotrifluoride
-
The invention discloses an efficient chlorination process of 2,4-dichlorobenzotrifluoride, and belongs to the field of organic synthesis. According to the method, 2, 4-dichlorotoluene is used as a rawmaterial, a mixture catalyst of cuprous chloride and copper powder is added, a target compound is obtained through two-step reaction of chlorination and fluorination, the raw materials applied in thereaction process are convenient to purchase, the production cost is low, after-treatment is simple, reaction conditions are mild, and good economic benefits and social benefits are achieved.
- -
-
Paragraph 0022; 0026
(2019/12/02)
-
- Efficient chlorination process of dichlorobenzotrifluoride
-
The invention discloses an efficient chlorination process of dichlorobenzotrifluoride, and belongs to the field of organic synthesis. According to the method, dichlorotoluene is used as a raw material, a mixture catalyst of cuprous chloride and copper powder is added, a target compound is obtained through two-step reaction of chlorination and fluorination, the raw materials applied in the reactionprocess are convenient to purchase, the production cost is low, after-treatment is simple, reaction conditions are mild, and good economic benefits and social benefits are achieved.
- -
-
Paragraph 0041; 0045
(2019/12/02)
-