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Method for removing volatilization ingredients of synthetic rubber

A technology of synthetic rubber and volatile matter, which is applied in the direction of drying solid materials, drying solid materials without heating, lighting and heating equipment, etc., which can solve the problems of large equipment investment, many personnel, high energy consumption, etc., to reduce equipment investment and simplify Process, the effect of shortening the process

Active Publication Date: 2009-01-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet process has a long process, a large investment in equipment, high energy consumption, large related workshops and many personnel

Method used

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  • Method for removing volatilization ingredients of synthetic rubber
  • Method for removing volatilization ingredients of synthetic rubber
  • Method for removing volatilization ingredients of synthetic rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The structure of this process device is as follows (see figure 1 ): Twin-screw exhaust extruder 6 is divided into rear exhaust area 16, 2 # exhaust area 13, 3 # exhaust area 19, 4 # exhaust area 21, 5 # exhaust area 22 vacuum exhaust area, the glue pump 18 is connected to the glue inlet 15 between the rear exhaust area and 2# exhaust area through pipelines, and the outlet pipes of the rear exhaust area, 2# exhaust area and 3# exhaust area are respectively connected After the vacuum pumps 17, 14, 12 are connected to the intermediate tank 2 through the extraction solvent pipeline 8, the separator 5, and the cooler 4, the outlets of the 4# exhaust area and the 5# exhaust area are respectively connected to the vacuum pumps 20, 9, and then respectively connected to the solid state Transmitters 11 and 10 are connected to intermediate tank 1 through solvent removal pipeline 23 , separator 7 and cooler 3 .

Embodiment 2

[0023] This embodiment is a set of dry process rubber devolatilization pilot test device with an annual output of 100 tons of dry rubber. The quality is qualified, and a total of more than 500 kilograms of products have been obtained.

[0024] 1. Twin-screw vented extruder:

[0025] Model: Co-rotating twin-screw PE-50

[0026] Diameter: 50.5mm Aspect Ratio: 52

[0027] 2. Each exhaust port is connected to a vacuum pump, and the vacuum degree is controlled in sections.

[0028] The rare earth glue (glue solid content above 18%) enters the twin-screw vented extruder, the residence time is 60-240 seconds, the processing temperature is 70-140 degrees, and the solvent is removed in a vacuum state, and the volatile content of the product can reach Below 1%, the performance of raw rubber and vulcanized rubber is equivalent to that of background craft products.

[0029] The twin-screw exhaust extruder has five vacuum exhaust chambers, and the exhaust port is connected with a vacuu...

Embodiment 3

[0054] Devolatilization of nickel-based butadiene rubber in dry coagulation process

[0055] Since Ni is a variable-valence metal, it is required in the present invention that Ni in the rubber compound is low.

[0056] Glue Ni content: Ni / Bd is less than 1.5*10 -5 mol / mol

[0057] Glue solid content: more than 18%

[0058] The structure of the process equipment of the twin-screw exhaust type extruder is the same as that of Embodiment 1: including 5 control zones.

[0059] temperature control:

[0060] Table 1 Twin-screw vented extruder temperature control: unit is degree

[0061] Equipment location

[0062] Vacuum control:

[0063] Vacuum degree control: the unit is MPa

[0064] Table 2 Vacuum degree control of twin-screw vented extruder

[0065] Equipment location

[0066] Twin-screw exhaust type extruder Glue inlet pressure control: 0.4~1.5MPa

[0067] Twin-screw vented extruder screw speed control: 20-80 rpm

[0068] Solvent recovery system temp...

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Abstract

The invention relates to a method for removing volatile flux from synthetic-rubber. The method adopts a twin-screw exhaust extruder which has five vacuum exhausting chambers and each air outlet thereof is connected with a vacuum pump, wherein, the five vacuum exhausting chambers are a rear exhaust area, a No.2 exhaust area, a No.3 exhaust area, a No. 4 exhaust area, and a No. 5 exhaust area in sequence. A glue solution intake is arranged between the rear exhaust area and the No.2 exhaust area, a twin-screw solid transmitter is connected with the air outlet of the No. 4 exhaust area and the air outlet of the No. 5 exhaust area; removal of the volatile flux is carried out under vacuum condition, firstly, a glue solution is squeezed into the rear exhaust area by a screw in a negative direction, 30 percent to 50 percent of the volatile flux is removed in the rear exhaust area, then the glue solution enters into the No.2 exhaust area, the No.3 exhaust area, the No. 4 exhaust area, and the No. 5 exhaust area in positive direction, processing temperature is controlled at 70 DEG C to 140 DEG C, and temperature of each area of the twin-screw exhaust extruder is controlled in subsection; vacuum degree is controlled at minus 0.02MPa to 0.08MPa, and the vacuum degree of each area is controlled in subsection; the recovery ration of dry glue after the removal of the volatile flux of the glue solution is 100 percent and the recovery ration of solvent is over 96 percent.

Description

technical field [0001] The invention relates to a method for removing volatile components of solvent in rubber glue by using a twin-screw venting extruder. Background technique [0002] In the 1960s, my country independently developed the solution method butadiene rubber synthesis production technology. Since then, many domestic butadiene rubber plants have started construction, and the process is all this process. [0003] At present, the solution polymerization method produces synthetic rubber, and the process of removing volatile matter (called wet process) is as follows: [0004] The rubber glue passes through the coagulation kettle, the solvent is stripped by water vapor, and the glue is condensed in hot water; the dispersant catalyst, etc. are washed away in the rubber washing tank, dehydrated by a vibrating screen, dehydrated by a dehydration extruder, and dried by an expansion dryer and a drying oven. Vertical lifting machine, weighing briquetting packing. The wet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B5/14
Inventor 顾振楣张志强刘峰林曙光关晓春
Owner PETROCHINA CO LTD
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