A kind of preparation method and preparation system of insoluble sulfur

A preparation system and technology for sulfur, applied in the preparation/purification of sulfur, etc., can solve the problems of complex operation process, poor thermal stability of insoluble sulfur, low yield, etc., achieve simple equipment and operation, improve process production efficiency, and improve yield. rate effect

Active Publication Date: 2021-11-09
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0006] At present, the insoluble sulfur produced by the existing low-temperature melting method has poor thermal stability and low yield, and the continuous operation process of the system is complicated

Method used

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  • A kind of preparation method and preparation system of insoluble sulfur
  • A kind of preparation method and preparation system of insoluble sulfur
  • A kind of preparation method and preparation system of insoluble sulfur

Examples

Experimental program
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Embodiment 1

[0089] 4 tons / hour of liquid sulfur 100 is preheated to 120°C and enters the polymerization kettle. The amount of initiator added to the polymerization kettle is 0.15wt% of the amount of liquid sulfur added. The sulfur is heated to 255°C through the jacket in the polymerization kettle for polymerization. And keep the temperature for 30 minutes; the polymerized sulfur is continuously fed in and out of the material under the action of the rake-type stirring paddle, and the discharge is pressurized by the gear pump, 60wt% of the material is discharged to the quenching device, and 40wt% of the material is returned to the hollow shaft of the rake-type stirring paddle with the Feed mix. After the liquid sulfur is polymerized, it is granulated and quenched in the quenching device. The granulation is 2 mm in diameter. , FeCl 3 Adding amount is 0.3% (mass fraction) of sulfur mass, HNO 3 The amount added is 2% (mass fraction) of the mass of sulfur. The quenched crude product is promo...

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Abstract

The invention discloses a preparation method and a preparation system for insoluble sulfur. The preparation system includes a polymerization kettle, a quenching device, a drying and curing unit; The outlet of the cooling device is connected to the inlet of the drying unit through a pipeline; the quenching device includes a shell, and the inside of the shell includes a feed quenching section, a material conveying section and a discharge section according to the flow direction of the material; the feed The quenching section is equipped with a feed distributor and a quenching liquid distributor. The material conveying section includes several layers of conveyor belts. Both ends of each layer of conveyor belts are equipped with fixed shafts, and a discharger is installed in the discharge section. At the same time, a method for preparing insoluble sulfur using the above preparation system is also provided. The insoluble sulfur preparation method and preparation system of the present invention can realize continuous quenching and continuous extraction of polymerized sulfur through continuous granulation, continuous transportation, and continuous cycle extraction of the extractant, so as to ensure the purity, thermal stability and yield of the product, and are suitable for large-scale continuous chemical production.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and relates to a preparation method and a preparation system of insoluble sulfur. Background technique [0002] With the sharp increase in oil consumption, global oil resources are increasingly scarce, and the quality and inferiority of refinery raw materials are becoming more and more serious. At the same time, environmental protection regulations in various countries are becoming stricter, and the control of total sulfur content in petroleum products and natural gas is becoming more stringent. Therefore, the capacity of sulfur recovery units in major refineries and natural gas purification plants has increased rapidly. The domestic and foreign markets of this common sulfur have become saturated, so the price is low. How to provide high value-added sulfur products that are in short supply in the market has become the focus of relevant enterprises. [0003] Insoluble sulfur is a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/12
CPCC01B17/12
Inventor 王海波廖昌建孟凡飞朴勇
Owner CHINA PETROLEUM & CHEM CORP
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