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Technique for extracting and washing sulfurized isobutene

A sulfurized isobutylene and process technology, which is applied in the field of sulfurized isobutylene washing process, can solve the problems of lower equipment utilization, long temperature time, large amount of solvent gasoline, etc., and achieve the effect of energy saving and less extractant

Inactive Publication Date: 2011-04-13
HOLITECH TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The shortcoming of the extraction and washing process of prior art is: 1) No. 120 solvent gasoline is a kind of complicated mixture, after being miscible with sulfene, it is difficult to pass the flash point of the product, and it often takes a long time to reach the requirement. 0.095MPa, qualified for more than 5 hours, the temperature is high and the time is long when distilling and recovering gasoline, which causes the color of the finished sulfene product to be dark; 2) The amount of solvent gasoline is large, which takes up the space of the equipment and reduces the utilization rate of the equipment; it also causes Reduce the waste of energy and increase the instability of safe production
3) the yield of the product of prior art is low, at about 90%

Method used

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  • Technique for extracting and washing sulfurized isobutene

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Comparison scheme
Effect test

Embodiment 1

[0020] 1) Add 500Kg of sulfur monochloride, 390Kg of isobutylene, and 11Kg of methanol into the reaction kettle at room temperature and react at 50°C for 4 hours to obtain 835Kg of adduct, which is added to the dechlorination tower, and 100Kg of isopropanol and 18% of sodium sulfide are added dropwise The solution was 500Kg, refluxed at 82°C for 3 hours, after the reaction was completed, the temperature was raised to 90°C, and the isopropanol was recovered under reduced pressure to obtain crude isobutylene sulfide.

[0021] 2) At room temperature, methanol and water are used to configure detergent according to the volume ratio of 1:10; take 1000Kg of crude product, add 300Kg of detergent, stir for 15min, then raise the temperature to 65°C, distill for 10min under vacuum at 0.05Mpa, and distill out Methanol; stand still for 30 minutes, separate the water after separation, then raise the temperature to 120-125°C, and distill at a vacuum degree of 0.08Mpa to obtain 980Kg of sulfur...

Embodiment 2

[0023] Start from step 2), at room temperature, methanol and water are used to prepare detergent according to the volume ratio of 1:10; take 1000Kg of crude product, add 350Kg of detergent, stir for 18min, then heat up to 68°C, and distill at a vacuum of 0.05Mpa After 13 minutes, methanol was distilled off; after standing still for 35 minutes, the water was removed after the layers were separated, and then the temperature was raised to 125-130°C, and the finished product of sulfurized isobutylene was obtained by distillation under a vacuum degree of 0.08Mpa. All the other are with embodiment 1.

Embodiment 3

[0025] Starting from step 2), under normal temperature, methanol and water are used to configure detergent according to the volume ratio of 1:10; take 1000Kg of crude product, add 400Kg of detergent, stir for 20min, then heat up to 70°C, and distill at a vacuum of 0.05Mpa After 10 minutes, methanol was distilled off; after standing still for 40 minutes, the water was separated after the layers were separated, and then the temperature was raised to 135-140°C, and the finished product of sulfurized isobutylene was obtained by distillation under a vacuum degree of 0.08Mpa. All the other are with embodiment 1.

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Abstract

This invention discloses a process for extracting isobutylene sulfide with methanol as the extractant. Compared with the present technique (using 120# gasoline as the extractant), this process has such advantages as low extractant consumption, easy recovery, and high isobutene yield.

Description

technical field [0001] The invention belongs to the technical field of sulfides of acyclic unsaturated carbon frame, and in particular relates to a sulfurized isobutylene washing process. Background technique [0002] Sulfurized isobutylene is an organic sulfur extreme pressure and anti-wear additive for lubricating oils. Due to its high sulfur content, extreme pressure and anti-wear properties, and good oil solubility, it is widely used in gear oils, metal additives and greases. [0003] At present, the synthesis of sulfurized isobutylene is mainly to obtain the crude product sulfurized isobutylene after sulfur monochloride and alkali metal or alkaline earth metal sulfide and isobutene through addition reaction and sulfuration dechlorination reaction, and then extract and wash with No. 120 solvent gasoline, and then After filtering through diatomaceous earth, the finished product is obtained. [0004] The shortcoming of the extraction and washing process of prior art is: 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C321/18C07C319/24C10M135/22C10N30/06
Inventor 庞世森亓即道段会伟李纪文
Owner HOLITECH TECH CO LTD
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