Unlock instant, AI-driven research and patent intelligence for your innovation.

Removal Method of Volatile Sulfur Compounds in Mixed Hydrocarbons

A technology of sulfide and mixed hydrocarbons, applied in the field of desulfurization, can solve the problems of difficult treatment, high cost, and large consumption of lye, and achieve the effect of avoiding high treatment cost

Active Publication Date: 2021-04-02
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of method is simple in process and has good desulfurization effect, but there are two defects: one is high cost, especially for high sulfide-containing mixed hydrocarbons, and the consumption of lye is large; Sodium sulfide and sodium hydrosulfide formed by treatment with sodium hydroxide solution are difficult to regenerate, and they are treated with alcohol amine solution, because the mixed hydrocarbon contains C 8 + Components, resulting in incomplete regeneration of the alcohol amine solution, resulting in waste of the alcohol amine solution
This method is mainly used for the fine removal of sulfides in light hydrocarbons, and is not suitable for the removal of high-sulfur mixed hydrocarbons and light hydrocarbons

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Removal Method of Volatile Sulfur Compounds in Mixed Hydrocarbons
  • Removal Method of Volatile Sulfur Compounds in Mixed Hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A crude oil processing station produces 45 tons of mixed hydrocarbons per day, the mass fraction of hydrogen sulfide in the mixed hydrocarbons is 0.12%, and the mass fraction of methyl mercaptan is 0.019%, C 1 ~C 4 The mass fraction is 4.9%, C 5 ~C 8 The mass fraction is 92.1%, C 9 + The mass fraction is 2.85%, and the content of other sulfides is 0.011%; the saturated vapor pressure is 98.2kPa. The temperature of the mixed hydrocarbons entering the tower is 50°C, the bottom temperature is 130°C, the tower pressure is 900kPa, and the reflux ratio is 1:2. After the mixed hydrocarbons are treated, the stable light hydrocarbon hydrogen sulfide mass fraction at the bottom of the tower is 0%. The mass fraction is 0.0045%, and the saturated vapor pressure is 63.3kPa.

Embodiment 2

[0047] A crude oil processing station produces 45 tons of mixed hydrocarbons per day, the mass fraction of hydrogen sulfide in the mixed hydrocarbons is 0.12%, and the mass fraction of methyl mercaptan is 0.019%, C 1 ~C 4 The mass fraction is 4.9%, C 5 ~C 8 The mass fraction is 92.1%, C 9 + The mass fraction is 2.85%, and the content of other sulfides is 0.011%; the saturated vapor pressure is 98.2kPa. The temperature of the mixed hydrocarbons entering the tower is 60°C, the bottom temperature is 135°C, the tower pressure is 600kPa, and the reflux ratio is 1:2. After the mixed hydrocarbons are treated, the stable light hydrocarbon hydrogen sulfide mass fraction at the bottom of the tower is 0%. The mass fraction is 0.0041%, and the saturated vapor pressure is 62.8kPa.

Embodiment 3

[0049] A crude oil processing station produces 45 tons of mixed hydrocarbons per day, the mass fraction of hydrogen sulfide in the mixed hydrocarbons is 0.12%, and the mass fraction of methyl mercaptan is 0.019%, C 1 ~C 4 The mass fraction is 4.9%, C 5 ~C 8 The mass fraction is 92.1%, C 9 + mass fraction is 2.85%, other sulfide content is 0.011%; saturated vapor pressure is 98.2kPa. The temperature of the mixed hydrocarbons entering the tower is 45°C, the bottom temperature is 140°C, the tower pressure is 800kPa, and the reflux ratio is 1:2. After the mixed hydrocarbons are treated, the stable light hydrocarbon hydrogen sulfide mass fraction at the bottom of the tower is 0%. The mass fraction is 0.0037%, and the saturated vapor pressure is 62.7kPa.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of desulfurization, in particular to a removing method for volatile sulfides in mixed hydrocarbons. The removing method comprises the following steps of (1) introducing sulfur-containing mixed hydrocarbons into a fractionating tower, wherein lighter components and the volatile sulfides are separated out from the top of the tower, and stable light hydrocarbons flow out from the bottom of the tower; (2) after the lighter components and the sulfides are condensed by a condenser, allowing part of condensates to backflow to the fractioning tower and theother part of the condensates to enter a natural gas desulfurization system; (3) recycling and treating the lighter components and the volatile sulfides by the natural gas desulfurization system. Theremoving method has the advantages that the volatile sulfides in the mixed hydrocarbons are separated according to a physical method, so that the problems of conventional chemical methods, including high treatment cost and incapability of recycling waste liquid or recycling waste liquid thoroughly, are avoided.

Description

technical field [0001] The invention relates to the technical field of desulfurization, in particular to a method for removing volatile sulfides in mixed hydrocarbons. Background technique [0002] Sulfides usually exist in crude oil, and these sulfides mostly exist in reduced form, including elemental sulfur, hydrogen sulfide, mercaptan, sulfide, thiophene, etc. The sulfur content is related to the geological source of crude oil and the mining period. The sulfur content of Daqing crude oil is less than 0.2%, the sulfur content of Shengli crude oil reaches more than 1.0%, the sulfur content of crude oil from Tahe Oilfield reaches more than 2.0%, and the sulfur content of some crude oil from the Middle East, such as Saudi Arabia, even reaches as high as 5.0%. . Sulphides in crude oil, especially hydrogen sulfide and light mercaptans, are severely corrosive to crude oil storage and transportation equipment and refinery units, increasing the cost of crude oil transportation, r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/02
CPCC10G53/02C10G2300/1037C10G2300/207
Inventor 叶帆赵德银杨志勇钟荣强黎志敏姚丽蓉常小虎郭靖滕建强李鹏杨思远崔伟
Owner CHINA PETROLEUM & CHEM CORP