摘要:
PROBLEM TO BE SOLVED: To provide a method for producing para-dichlorobenzene, by which a reactor can be operated as a full scale facility to give the para-dichlorobenzene in high reaction selectivity. SOLUTION: This method for producing the para-dichlorobenzene, comprising chlorinating at least one of benzene and monochlorobenzene as a raw material with chlorine gas, is characterized by supplying the raw material and the chlorine gas to a first step reactor among reactors having a plurality of steps and having a zeolite-containing catalyst set therein, separating the first step reaction product into the un-reacted raw material and the product, returning the un-reacted product to the first step reactor, supplying the product to the next step reactor, supplying the chlorine gas to the next and latter step reactors, and obtaining the para-dichlorobenzene from the final step reaction product. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a method for producing para-dichlorobenzene, by which the objective compound can be obtained in a high yield in stable operation on work as a real apparatus. SOLUTION: This method for producing the para-dichlorobenzene, comprising chlorinating at least one of benzene and monochlorobenzene as a raw material with chlorine gas, is characterized by supplying the chlorine gas to each of reactors in which a catalyst containing alumina as a main component is disposed and which are arranged at a plurality of stages, in parallel, supplying the raw material and the chlorine gas to the first stage reactor, supplying the first stage reaction product to the next stage reactor, supplying the chlorine gas to the next and further continuing reactors in parallel, and obtaining the para-dichlorobenzene from the final stage reaction product. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a new process for producing p-dichlorobenzene, which satisfies both of high p-dichlorobenzene selectivity and a high chlorine conversion rate. SOLUTION: There is provided a process for producing p-dichlorobenzene by carrying out the nuclear chlorination reaction of benzene and/or chlorobenzene with chlorine in the presence of a Lewis acid catalyst and a phenothiazine compound, wherein the process uses a reactor equipped with a first supply route for continuously supplying a mixed solution 11 of benzene and/or chlorobenzene and the Lewis acid catalyst to a first reactor 1, a second supply route for continuously supplying a mixed solution 12 of benzene and/or chlorobenzene and the phenothiazine compound to the reactor, and a third supply route for continuously supplying chlorine 17 to the reactor, and the reaction raw materials are supplied by opening the first and third supply routes in random order when the reaction is started and subsequently opening the second supply route. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To improve the distillation separation efficiency of p-dichlorobenzene in the separation and purification of an extracted and recovered polymerization solvent in the production of PAS. SOLUTION: A liquid mixture of (A) water, (B) a hydrophobic organic solvent forming an azeotropic mixture with water and having specific gravity of COPYRIGHT: (C)2009,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a method based on extractive rectification, capable of separating a mixture containing m-dichlorobenzene (m-DCB) and p-dichlorobenzene (p-DCB) into the m-DCB and the p-DCB. SOLUTION: An extractant used in the method comprises a phosphoric acid ester expressed by general formula (I) (R 1 to R 3 are each an aliphatic or alicyclic alkyl or an aliphatic or alicyclic alkenyl, and R 1 to R 3 together have 3 to 12 carbon atoms in total), a mixture of the phosphoric acid esters of which the types are different from each other, a phosphine oxide expressed by general formula (II) (R 1 to R 3 are each an aliphatic or alicyclic alkyl, an aliphatic or alicyclic alkenyl or H, and R 1 to R 3 together have 3 to 12 carbon atoms in total), another mixture of the phosphine oxides of which the types are different from each other or the other mixture of the phosphoric acid ester and the phosphine oxide. COPYRIGHT: (C)2004,JPO