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Method and equipment for continuously synthesizing rubber vulcanization accelerator S

A technology of vulcanization accelerator and synthetic rubber, applied in the field of continuous synthetic rubber vulcanization accelerator, can solve the problems of volatile raw materials, waste of raw materials, inability to guarantee quality stability and the like

Active Publication Date: 2021-04-09
SHANDONG SUNSINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the industrially synthesized accelerator S usually adopts a batch reaction method. Because the raw materials cannot be fully contacted in time, and the raw materials are volatile, at the production operation site, the volatile odor of raw materials is scattered in the air. First, it causes waste of raw materials; The on-site environment is poor, causing environmental waste gas pollution; third, the quality of the synthesized accelerator S is uneven between batches, and the stability of the quality cannot be guaranteed; fourth, there are many incompletely reacted waste carbons after the reaction, which increases the amount of carbon process, there are potential safety hazards and waste of raw materials; fifth, the batch reaction is usually a tank reaction, with many reactors and a large footprint

Method used

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  • Method and equipment for continuously synthesizing rubber vulcanization accelerator S
  • Method and equipment for continuously synthesizing rubber vulcanization accelerator S
  • Method and equipment for continuously synthesizing rubber vulcanization accelerator S

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This example provides the structure of a continuous reaction device.

[0028] A device for continuously synthesizing rubber vulcanization accelerator S, including a device body, the device body includes a tubular reactor, the tubular reactor is installed horizontally, and a blast pipeline is arranged above the front end of the reactor inlet, and the blast pipeline Go deep into the bottom of the reactor vertically, and lay flat on the bottom of the reactor, and evenly distribute the air outlet holes on the blast pipe at the bottom of the reactor. Feed rate design, present embodiment is a row. The outermost end of the inlet of the tubular reactor is closed ( figure 2 The leftmost end of the middle reactor), the outlet end ( figure 2 The rightmost end of the middle reactor) is provided with a circular overflow port in the middle; the upper end of the second half of the reactor is connected with a vent valve pipeline, which is connected to the tail gas absorption device...

Embodiment 2

[0035] This example provides a method for continuously synthesizing the rubber vulcanization accelerator S.

[0036] Use a graduated cylinder to measure 30ml of water, 115ml of dimethylamine aqueous solution with a mass fraction of 40%, 57ml of carbon disulfide with a mass fraction of 98% (add a small amount of water for liquid sealing to reduce volatilization), and 81ml of an aqueous sodium hydroxide solution with a mass fraction of 32%. , put into four custom-made glass beakers with glass outlets and switches at the bottom, and the steam pipes are put into the glass beakers where the water is placed, to heat the water and keep the temperature between 40-45 °C, and insert a thermometer at the same time Measurement. The remaining raw materials are charged at room temperature. Before adding the raw materials, turn on the blower; when adding the raw materials, first drop 30ml of water, the peristaltic pump speed is 7.6 rpm, then add 115ml of dimethylamine, and the peristaltic p...

Embodiment 3

[0041] On the basis of the conditions in Example 2, the feed rate of the raw materials was increased to carry out the feed reaction.

[0042] When the temperature of the reaction system is 25-45°C, turn on the blower, turn on 57ml of water in turn, the peristaltic pump speed is 28.8 rpm, 218.5ml dimethylamine, the peristaltic pump speed is 98.0 rpm, 108.3ml carbon disulfide, the peristaltic pump speed is 49.4 rpm Minutes, 153.9ml liquid caustic soda, peristaltic pump speed 69.2 rpm, the above four materials are added dropwise to the tubular reactor according to the above dosage and peristaltic pump speed.

[0043] The liquid flowing out of the tubular reactor is the accelerator S, which is a light yellow liquid with no peculiar smell, a specific gravity of 1.070g / ml, and no waste carbon. The liquid accelerator S was concentrated under reduced pressure at a temperature of 30°C. After 45 minutes, after all the crystals were precipitated, it was filtered with suction to obtain 24...

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Abstract

The invention belongs to the technical field of rubber vulcanization accelerator S production, and relates to a method and equipment for continuously synthesizing a rubber vulcanization accelerator S. Continuous production can be achieved from feeding to discharging, and industrial operation is convenient to achieve. A tubular reactor is small in size and high in production efficiency, the synthesized accelerator S is stable in quality and free of peculiar smell, and the yield of the further synthesized accelerator S is increased.

Description

technical field [0001] The invention belongs to the technical field of rubber vulcanization accelerator S production, and relates to a method and equipment for continuously synthesizing rubber vulcanization accelerator S. Background technique [0002] Accelerator S, chemical name: sodium dimethyldithiocarbamate, amber to light green or white scaly crystals, or light yellow to orange liquid. Accelerator S is an ultra-fast vulcanization accelerator, suitable for latex of natural rubber, styrene-butadiene rubber, neoprene and nitrile rubber, and also an intermediate product of terminator and accelerator TMTD for the polymerization of styrene-butadiene rubber. [0003] At present, the industrially synthesized accelerator S usually adopts a batch reaction method. Because the raw materials cannot be fully contacted in time, and the raw materials are volatile, at the production operation site, the volatile odor of raw materials is scattered in the air. First, it causes waste of raw...

Claims

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Application Information

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IPC IPC(8): C07C333/16C07C333/14B01J19/24
CPCC07C333/16C07C333/14B01J19/2415B01J19/0053B01J19/0006B01J19/0013B01J2219/00094B01J2219/00162
Inventor 刘园园孟凡虎张颂姚显锋吕桂中徐清华
Owner SHANDONG SUNSINE CHEM
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