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Technology and system for preparing vulcanizing agent by using sweetening waste of lye regenerated byproducts

A technology for removing thiols and vulcanizing agents, applied in the preparation of organic compounds, catalyst activation/preparation, catalysts for physical/chemical processes, etc., can solve problems such as environmental pollution, save the vacuum system, simplify the production process, and avoid decomposition. Effect

Active Publication Date: 2013-03-13
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the refinery mainly uses the incineration method for treatment. This treatment method not only requires a large amount of treatment costs, but also produces a large amount of sulfur dioxide during the incineration process, which still causes serious pollution to the environment and cannot completely solve the pollution to the environment.

Method used

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  • Technology and system for preparing vulcanizing agent by using sweetening waste of lye regenerated byproducts
  • Technology and system for preparing vulcanizing agent by using sweetening waste of lye regenerated byproducts
  • Technology and system for preparing vulcanizing agent by using sweetening waste of lye regenerated byproducts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The outlet temperature of the raw material preheater is 135°C, that is, the feed temperature is 135°C.

[0036] Tower top temperature: 130°C

[0037] Tower kettle temperature: 155°C

[0038] Reflux ratio: 1:1

[0039] The pressure at the top of the column is normal pressure, and the number of theoretical plates in the rectification column is 5

[0040] 5 tons of raw materials were processed, and 4.88 tons of vulcanizing agent products were obtained, with a product yield of 97.6%. The properties of the products are as follows:

[0041]

[0042]

[0043] It is determined by experiments that the sulfur decomposition temperature of each component in the obtained vulcanizing agent is ≯230°C, and the content of dimethyl disulfide is ≮35%. The effect of using the vulcanizing agent is equivalent to that of pure dimethyl disulfide. At 230°C, some sulfur-containing components do not decompose, and the content of dimethyl disulfide is more than 35%, so it meets the qualit...

Embodiment 2

[0045] The outlet temperature of the raw material preheater is 125°C, that is, the feed temperature is 125°C.

[0046] Tower top temperature: 120°C

[0047] Tower kettle temperature: 140°C

[0048] Reflux ratio: 1:1

[0049] The pressure at the top of the column is normal pressure, and the number of theoretical plates in the rectification column is 5

[0050] Treat 5 tons of raw materials, obtain 4.53 tons of vulcanizing agent products, and the product yield is 90.6%. The properties of the products are as follows:

[0051]

[0052]

[0053] It is determined by experiments that the decomposition temperature of sulfur in each component of the vulcanizing agent is ≯230°C, and the content of dimethyl disulfide is ≮35%. The effect of using the vulcanizing agent is equivalent to that of pure dimethyl disulfide. The components are similar to the vulcanizing agent in Example 1, so some sulfur-containing components do not decompose at a temperature of 230°C, and the content of...

Embodiment 3

[0055] The outlet temperature of the raw material preheater is 130°C, that is, the feed temperature is 130°C.

[0056] Tower top temperature: 126°C

[0057] Tower kettle temperature: 150°C

[0058] Reflux ratio: 1:1

[0059] The pressure at the top of the column is normal pressure, and the number of theoretical plates in the rectification column is 5

[0060] 5 tons of raw materials were processed, and 4.77 tons of vulcanizing agent products were obtained, with a product yield of 95.4%. The properties of the products are as follows:

[0061]

[0062] It is determined by experiments that the decomposition temperature of sulfur in each component of the vulcanizing agent is ≯230°C, and the content of dimethyl disulfide is ≮35%. The effect of using the vulcanizing agent is equivalent to that of pure dimethyl disulfide. The composition of the vulcanizing agent is similar to that of the vulcanizing agent in Example 1, so there is no case that some sulfur-containing components ...

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Abstract

The invention discloses a technology for preparing a vulcanizing agent by using a sweetening waste of lye regenerated byproducts. The sweetening waste of the lye regenerated byproducts is continuously sent into a rectifying tower through a charging pump for fractionation. Non-metallic compounds in the waste are heated and evaporated into steam which rises to a tower top as an overhead fraction; the overhead fraction enters a top condenser and is condensed into liquid which then enters a reflux tank; a part of the liquid in the reflux tank is sent into a product tank and used as the finished vulcanizing agent; and the other part of the liquid in the reflux tank, as a reflux liquid, is sent back to the rectifying tower by a reflux pump to join the waste liquid entering the tower for further fractionation, until the sweetening waste of the lye regenerated byproducts of a same batch is completely processed. The technology has advantages of suitably controlled fractionation condition and high yield of the vulcanizing agent.

Description

technical field [0001] The invention relates to a process for preparing a vulcanizing agent, in particular to a process for preparing a vulcanizing agent by using sweetening waste liquid regenerated by alkali liquor. The invention also relates to a system suitable for the above-mentioned process. Background technique [0002] The liquefied petroleum gas produced by the refinery needs to be sweetened before leaving the factory. The treatment method is to contact the liquefied petroleum gas with lye. The mercaptan in the liquefied gas reacts with the NaOH in the lye to form sodium mercaptide, which is dissolved in the lye to realize the removal of mercaptan in the liquefied gas. In the early sweetening process, when the lye After the NaOH in the lye is completely consumed, the lye is sent to the waste water treatment plant for treatment, resulting in a high cost of waste water treatment. In recent years, Ningbo Zhongyi Company has developed oxygen-enriched oxidative regenera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C319/28C07C321/14B01J37/20
Inventor 廖定满华献君黄艳芳卢振旭梁胜彪谭伟红梁红梅王家华邓翠花刘国禹周小群周万里陈小菊
Owner CHINA PETROLEUM & CHEM CORP
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