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Reaction system and method for continuously synthesizing rubber vulcanization accelerator, namely dibenzothiazyl disulfide

A technology of dibenzothiazole disulfide and vulcanization accelerator, which is applied in the field of reaction systems for continuous synthesis of rubber vulcanization accelerator dibenzothiazole disulfide, can solve problems such as affecting the quality of DM, and is beneficial to environmental protection and improves the reaction yield. rate, and the effect of reducing the amount of backmixing

Pending Publication Date: 2020-03-06
WILLING NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the reaction oxidation process, due to the uneven dispersion of hydrogen peroxide, M will be overoxidized, which will affect the quality of DM when the mother liquor is applied mechanically.

Method used

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  • Reaction system and method for continuously synthesizing rubber vulcanization accelerator, namely dibenzothiazyl disulfide
  • Reaction system and method for continuously synthesizing rubber vulcanization accelerator, namely dibenzothiazyl disulfide
  • Reaction system and method for continuously synthesizing rubber vulcanization accelerator, namely dibenzothiazyl disulfide

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Effect test

Embodiment 1

[0043] See attached figure 1 , the reaction system for the continuous synthesis of rubber vulcanization accelerator dibenzothiazole disulfide of the present invention comprises a crude M feeder 1, an ammonia solution kettle 2, an extraction kettle 3, a phase separation tank 4, a three-stage oxidation reaction kettle 5 and a filter press 6. Each device is connected in series through pipelines; the upper part of the ammonia water dissolution kettle 2 is provided with an ammonia water feeder 2-1, the upper part of the extraction kettle 3 is provided with an extraction agent feeder 3-1, and the upper part of the oxidation reaction kettle 5 at each level is provided with Oxidant feeder 5-1.

Embodiment 2

[0045] See attached figure 1 , the reaction system for the continuous synthesis of rubber vulcanization accelerator dibenzothiazole disulfide of the present invention comprises a crude M feeder 1, an ammonia solution kettle 2, an extraction kettle 3, a phase separation tank 4, a five-stage oxidation reaction kettle 5 and a filter press 6. Each device is connected in series through pipelines; the upper part of the ammonia water dissolution kettle 2 is provided with an ammonia water feeder 2-1, the upper part of the extraction kettle 3 is provided with an extraction agent feeder 3-1, and the upper part of the oxidation reaction kettle 5 at each level is provided with Oxidant feeder 5-1.

Embodiment 3

[0047] See attached figure 1 , the reaction system for the continuous synthesis of rubber vulcanization accelerator dibenzothiazole disulfide of the present invention comprises a crude M feeder 1, an ammonia solution kettle 2, an extraction kettle 3, a phase separation tank 4, a seven-stage oxidation reaction kettle 5 and a filter press 6. Each device is connected in series through pipelines; the upper part of the ammonia water dissolution kettle 2 is provided with an ammonia water feeder 2-1, the upper part of the extraction kettle 3 is provided with an extraction agent feeder 3-1, and the upper part of the oxidation reaction kettle 5 at each level is provided with Oxidant feeder 5-1.

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Abstract

The invention discloses a reaction system and a method for continuously synthesizing a rubber vulcanization accelerator, namely dibenzothiazyl disulfide. The reaction system comprises a feeder, an ammonia water dissolving kettle, an extraction kettle, a phase splitting tank, a plurality of stages of oxidation reaction kettles and a filter press which are connected in series through pipelines, wherein an ammonia water feeder is arranged at the upper part of the ammonia water dissolving kettle; an extraction agent feeder is arranged at the upper part of the extraction kettle; and an oxidant feeder is arranged at the upper part of each stage of an oxidation reaction kettle. The method comprises the following steps: adding ammonia water into the ammonia water dissolving kettle, then adding crude M, and carrying out full mixing so as to obtain an M-NH4 solution; introducing the M-NH4 solution into the extraction kettle, adding an extraction agent, and carrying out extraction and phase-splitting so as to obtain a refined M-NH4 solution; introducing the obtained refined M-NH4 solution into the plurality of stages of the oxidation reaction kettles, adding hydrogen peroxide, and carrying out a full oxidation mixing reaction; and filtering an obtained reaction solution, and carrying out drying so as to obtain a product, namely the dibenzothiazyl disulfide DM. The reaction system providedby the invention is a water system, is safe, is free of waste salt, has small wastewater amount and facilitates environmental protection.

Description

[0001] 1. Technical field: [0002] The invention relates to the technical field of chemistry and chemical engineering, and relates to a reaction system and a method for continuously synthesizing a rubber vulcanization accelerator dibenzothiazole disulfide. [0003] 2. Background technology: [0004] Dibenzothiazole disulfide (also known as accelerator DM) is a commonly used thiazole accelerator. Thiazole accelerator is an acidic accelerator, commonly used are M, DM and MZ, among which DM is used in the largest amount, DM can be used in natural rubber, synthetic rubber and reclaimed rubber, and its use is similar to that of accelerator M, but the critical temperature of vulcanization is higher. High (130°C), widely used in the manufacture of tires, inner tubes, rubber shoes, tapes and general industrial products. [0005] At present, the method of industrial production of accelerator DM at home and abroad is mainly the oxidation method, and the oxidants used are sodium hypochl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D277/78
CPCC07D277/78
Inventor 章娟何为盛尹跃宁刘勇贵
Owner WILLING NEW MATERIALS TECH CO LTD
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