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N (The cyclohexyl thio), phthalimide's manufacturing method and installation

A technology of phthalimide and cyclohexylthio, which is applied in chemical instruments and methods, chemical/physical/physical-chemical stationary reactors, chemical/physical/physical-chemical processes, etc., can solve the problem of reaction yield Not necessarily satisfactory, insufficient raw material contact, etc., to achieve the effects of reducing reaction by-products, improving purity, and improving reaction yield

Inactive Publication Date: 2018-10-09
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For the above-mentioned method, there is no problem in the treatment of raw materials and target products, reaction operation, environmental burden, etc., and it can be implemented industrially. However, since a solvent containing a saturated hydrocarbon with low solubility is used at a high concentration, the reaction mixture Inhomogeneous solid-liquid state, insufficient contact between raw materials, and unsatisfactory reaction yield

Method used

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  • N (The cyclohexyl thio), phthalimide's manufacturing method and installation

Examples

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Embodiment

[0056] Hereinafter, the present invention will be described in more detail with reference to examples.

reference example 1

[0058] 3m made of glass-lined glass in the stirring tank type 3 In the reactor, the mixed solvent 1250Kg (toluene is 14% by weight, density 0.781Kg / L, 1600L), cooled to -20°C with refrigerant. While stirring, 303Kg of chlorine (molecular weight: 70.9, 4.27Kg moles) was blown into it at a liquid temperature of -20 to -10°C over 2.0 hours to chlorinate dicyclohexyl disulfide to obtain cyclohexylsulfenyl chloride. The solution is 2460Kg (the molecular weight is 150.7, the content of cyclohexylsulfenyl chloride is 1120Kg, and the mole is 7.43Kg).

reference example 2

[0060] As a solvent for the synthesis of cyclohexylsulfenyl chloride, 1340Kg of a mixed solvent of vinyl chloride (boiling point 83°C) / cyclohexane (20% by weight of vinyl chloride, density of 0.839Kg / L, 1600L) was used. Reference Example 1 was operated in the same manner to obtain a solution of 2550 Kg (7.43 Kg moles) of cyclohexylsulfenyl chloride.

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Abstract

The invention discloses an even the problem provide reaction mixture for the high concentration, for solid -liquid non -uniform state, raw materials contact each other insufficient, also can be attheindustrial N that advantageously makes (The cyclohexyl thio), phthalimide's method and device. The invention provides a N (The cyclohexyl thio), phthalimide's manufacturing method and installation. Inthe method, in a solvent comprising a saturated hydrocarbon, cyclohexyl hyposulfonyl chloride and phthalimide are mixed in a reactor, a part of the mixture is discharged out of the reactor, and thenthe discharged mixture is discharged into the reactor, so that the mixture is subjected to external circulation, and cyclohexyl hyposulfonyl chloride reacts with phthalimide to synthesize N (cyclohexyl thio) phthalimide.

Description

technical field [0001] The present invention relates to a method for producing a compound N-(cyclohexylthio)phthalimide useful as a vulcanization retardant in a rubber vulcanization step. More specifically, the present invention provides an industrially advantageous method and apparatus for producing N-(cyclohexylthio)phthalimide. Background technique [0002] Usually, N-(cyclohexylthio)phthalimide is produced by reacting cyclohexylsulfenyl chloride (cyclohexylsulfenyl chloride) and phthalimide in the coexistence of a base. Usually, in this production method, the raw material cyclohexylsulfenyl chloride is synthesized under strongly acidic conditions using chlorine, and then cyclohexylsulfenyl chloride and phthalimide are condensed under strongly basic conditions. Therefore, saturated hydrocarbons are used as solvents that are stable against strong acids and strong bases and have little burden on the environment, and the reaction is performed at a high concentration in orde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/48B01J19/18
CPCB01J19/1881C07D209/48
Inventor 西村一明增田满夫下川敦
Owner TORAY IND INC
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