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Synthetic method of sulfurized isobutylene

A technology of sulfided isobutylene and synthesis method, which is applied in the direction of organic chemistry, etc., and can solve problems such as inability to proceed with the reaction, sulfur denaturation, and poor melting of sulfur

Active Publication Date: 2021-01-19
SHANDONG HIMILE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems that may be caused by this process are firstly that the melting property of sulfur is not good, and it is easy to be blocked. After the blockage, the reaction cannot be carried out, and the reaction needs to be stopped and repaired.

Method used

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  • Synthetic method of sulfurized isobutylene

Examples

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preparation example Construction

[0019] The invention provides a method for synthesizing sulfurized isobutylene. The inventive method comprises the steps:

[0020] (i) Mix elemental sulfur and sulfurized isobutylene, add catalyst and heat to melt

[0021] The method for mixing sulfur and sulfurized isobutylene is not particularly limited, and may be a conventional mixing method, such as adding sulfurized isobutylene to sulfur and stirring and mixing. The applicable sulfur and sulfurized isobutylene are also not particularly limited, and may be commercially available sulfur and / or sulfurized isobutylene. In one example of the present invention, the sulfurized isobutylene is the sulfurized isobutylene prepared by the method of the present invention.

[0022] In an example of the present invention, the raw material elemental sulfur and sulfurized isobutylene are 5:1-1:1, preferably 4:1-1:1, better 3:1-1:1, and most preferably 2:1- 1:1 mass ratio for mixing to obtain mixed sulfur slurry.

[0023] The method o...

Embodiment 1

[0039] Add sulfur element and sulfurized isobutylene with a mass ratio of 1:1 into a high-temperature tank, add an organic base catalyst based on the weight of sulfur element, blow with nitrogen three to five times, heat and melt, and wait until the temperature rises to 120-200°C Use a sulfur pump to transport the material into the tubular reactor, add hydrogen sulfide and isobutylene (molar ratio 1:1.5) at the same time, control the reaction temperature at 145°C, and control the pressure at 1.54MPa, and the reaction is completed after 7 hours.

[0040] The above reaction was repeated in the same pipeline, and no pipeline blockage was found after 10 reactions. In addition, compared with the traditional high-pressure method, the pungent odor is significantly reduced.

Embodiment 2

[0042] Add sulfur element and sulfurized isobutylene in a high-temperature tank with a mass ratio of 1.5:1, add catalyst based on the weight of sulfur element, blow with nitrogen three to five times, heat and melt, and use a sulfur pump after the temperature rises to 120-200°C Transfer the material to the tubular reactor, add hydrogen sulfide and isobutylene (molar ratio: 1:1.8) at the same time, control the reaction temperature to 155°C, and control the pressure to 2.5MPa to complete the reaction after 5 hours.

[0043] The above reaction was repeated in the same pipeline, and no pipeline blockage was found after 10 reactions. In addition, compared with the traditional high-pressure method, the pungent odor is significantly reduced.

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Abstract

Disclosed is a synthesizing method of sulfurized isobutylene. The synthesizing method of sulfurized isobutylene comprises the following steps of (i) mixing elemental sulfur with isobutylene, and thenadding in catalysts for heated melting; (ii) feeding the molten materials into a tubular reactor and then inletting isobutylene.

Description

technical field [0001] The invention relates to a method for synthesizing sulfide compounds, in particular, the invention relates to a method for greenly synthesizing sulfide isobutylene by using hydrogen sulfide, elemental sulfur and isobutylene. [0002] technical background [0003] Sulfurized isobutylene is an extreme pressure and anti-wear additive for lubricating oil. Due to its high sulfur content, good extreme pressure and anti-wear properties, good oil solubility, low copper corrosion, low toxicity, light color, and low dosage, it is especially suitable for adjustment in production The sulfur index of the extreme pressure agent can produce sulfurized isobutylene products with different sulfur content and different activities, which can meet the specific requirements of various lubricating oils, greases and metal processing, and occupies an important position in sulfur-containing extreme pressure agents. [0004] In the current technology, the synthesis methods of sul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D341/00
CPCC07D341/00
Inventor 丁全有李宁李日翔肖淑焕
Owner SHANDONG HIMILE CHEM TECH
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