95-73-8Relevant articles and documents
Production process of high-purity 2,4-dichlorotoluene
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Paragraph 0021-0032, (2019/07/04)
The invention relates to the technical field of compound synthesis and purification, and particularly relates to a production process of high-purity 2,4-dichlorotoluene. The method comprises the following steps: carrying out catalytic synthesis on 2,4-dichlorotoluene by using p-chlorotoluene and chlorine, carrying out alkali washing, recovering fractions by rectifying, and carrying out purifying crystallization to obtain the high-purity 2,4-dichlorotoluene. The method solves the problem that 2,4-dichlorotoluene is low in yield and purity and is not easy to purify in the prior art. The prepared2,4-dichlorotoluene has the advantages that the yield is high, purity is high and materials can be recycled.
A method of preparing O-toluene
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Paragraph 0027-0034, (2017/08/31)
The invention relates to a preparation method of o-chlorotoluene. Particularly, methylbenzene is used as a raw material, Cl2 is used as a chlorine source, and [BMIM]Cl-nZnCl2(n is equal to 1, 2, 2.5, and n is a molar ratio of ZnCl2 to [BMIM]Cl) acidic ionic liquid is used as a catalyst to catalyze the methylbenzene to prepare the o-chlorotoluene; the [BMIM]Cl-nZnCl2(n is equal to 1, 2 or 2.5) acidic ionic liquid is used as a chlorinated catalyst, and the Cl2 is used as the chlorine source to perform selective chlorination on the methylbenzene. According to the method, the selectivity of the o-chlorotoluene in the product can be improved, the [BMIM]Cl-nZnCl2 ionic liquid catalyst separated from the product can also be repeatedly used, so the production cost is reduced, and the method is an important method for contributing to industrial production of the o-chlorotoluene.
Synthesis technology of 2,4-dichlorotoluene
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Paragraph 0011; 0012; 0013; 0014; 0015; 0016; 0017-0028, (2017/04/25)
The invention relates to a synthesis technology of 2,4-dichlorotoluene. The synthesis technology comprises the following steps of 1 production of a chlorination catalyst, wherein an L-type molecular sieve serves as a carrier to be put into a ferric chloride solution, an aluminum chloride solution and a titanium chloride solution to be mixed, then the L-type molecular sieve is put into a zinc chloride solution and a aluminum chloride solution to be mixed, the mixture is dried, and the chlorination catalyst can be prepared; 2 chlorination of p-chlorotoluene, wherein p-chlorotoluene is added into a reaction kettle, the chlorination catalyst is added into the reaction kettle, chlorine is introduced into the reaction kettle for a reaction, and an alkaline solution is added into a generated mixture for a reaction; 3 component separation, wherein a mixture generated in the step 2 is fed into a rectifying tower for four times of rectifying, and then 2,4-dichlorotoluene can be obtained. According to the synthesis technology, the effect of the chlorination catalyst is effectively improved, the reaction speed and the reaction yield are effectively increased, the selectivity of 2,4-dichlorotoluene is effectively promoted, generation of by-products is inhibited, and the yield of 2,4-dichlorotoluene is increased.