Rectification and purification device and rectification and purification method for disulphide recovery in refinery plant

A technology of disulfide and rectification, which is applied in the chemical industry, can solve the problems such as the cost of polluting the environment, poor production conditions, etc., and achieve the effects of low maintenance cost, low cost and good rectification effect.

Active Publication Date: 2013-03-06
NINGBO ZHONGYI PETROCHEM TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a rectification and purification device and method for recovering disulfides in a refinery, which overcomes the disadvantages of poor production conditions, environmental pollution and high production costs when disulfides are purified in existing products

Method used

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  • Rectification and purification device and rectification and purification method for disulphide recovery in refinery plant

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Embodiment Construction

[0021] Such as figure 1 As shown, a rectification and purification device for recovery of disulfide in a refinery described in the embodiment of the present invention includes a heater 1, and the heater 1 is connected to the middle part of the rectification tower 3 through a rectification pipeline 11. The heater The outer end of 1 is provided with raw material pipeline 10, and the bottom end of rectification tower 3 is connected with evaporator 2 through flange, and the bottom of rectification tower 3 is provided with waste material barreling pipeline 12, and the top of said rectification tower 3 is connected by return line 13 There is a condenser 4, the top side of the rectification tower 3 is connected with a reflux pump 6 through a reflux line 2 15, the condenser 4 is connected with a product tank 5 through a product line 14, and the product tank 5 is respectively connected with a metering tank through a metering line 16 7 and a reflux pump 6, the product tank 5 is connecte...

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Abstract

The invention relates to a rectification and purification device and a rectification and purification method for disulphide recovery in a refinery plant. The device comprises a heater, an evaporator, a rectification tower, a condenser, a product tank, a reflux pump, a metering tank and an adsorption tank. The device and the method haves the following beneficial effects: according to different boiling points of disulphides, the different disulphides can be separated out by virtue of a distillation method; according to the self demands of the refinery plant, the disulphides conforming to the requirements are recovered, most of dimethyl disulfide, methyl-ethyl disulfide and the like and minority alkaline liquor and catalysts are separated out, the disulphides with very high purity are recovered, the recovery purity is above 99.9%, the disulphide recovery rate is greater than or equal to 95%, the PH(Potential of Hydrogen) is equal to 7, the Na<+> content is less than 1mg/kg, and the Co content is less than 0.1mg/L; and meanwhile, the device has the characteristics of simple structure, low cost, low maintenance cost, safety, energy conservation, good disulphide rectification effect, environmental friendliness, economical efficiency, capability of adbsorbing harmful gas, and no pollution.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a rectification and purification device and method for recovering disulfides in a refinery. Background technique [0002] Disulfide is a by-product of liquefied gas sweetening unit in refinery, mainly dimethyl disulfide. Dimethyl disulfide has a foul smell and slight toxicity. Pure dimethyl disulfide is a widely used chemical raw material, so refineries pay more and more attention to the resource utilization of disulfide. [0003] At present, some domestic manufacturers use different processes to produce dimethyl disulfide, but there is no relevant literature on disulfide distillation, purification, recovery and utilization. Moreover, these production processes all have problems such as poor production conditions, serious environmental pollution and high production costs. Dimethyl disulfide is currently mainly used in the following aspects: 1) In the petroleum refining industry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/14C07C321/14C07C319/30B01D53/04B01D53/14
Inventor 喻武钢蔡喜洋施景聂通元童仁可贺立明杨仁宗
Owner NINGBO ZHONGYI PETROCHEM TECH
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