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Production method of mixed binary acid with long carbon chain

A technology of mixed dibasic acid and production method, which is applied in the separation/purification of carboxylic acid compounds, separation/purification of hydroxyl compounds, preparation of carboxylate salts, etc. The effect of reducing environmental pollution

Active Publication Date: 2012-11-28
山东广通新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These long carbon chain dibasic acids are often discarded or piled up during the refining process, which not only pollutes the environment, but also causes waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 1 ton of heavy components and mix them evenly on a stainless steel plate, take a sample to determine the amount of 30wt.% liquid caustic soda needed for complete reaction to generate sodium salt, first put 1.4 tons of excess 3% liquid caustic soda into the reaction kettle, heat to 95°C, and put in For heavy components, stir while pouring, and collect the ethanol-containing solution with an alcohol mist absorption tower while reacting. The reaction time is 2.5 hours, and samples are taken to determine whether the reaction is complete. After the reaction is complete, the processing industry demineralizes the salt water (calculated according to undecane dibasic acid) to an acid content of 65g / L, adds 0.5% (volume ratio) activated carbon for decolorization, and uses the filter cake again, and then filters the clear liquid through the filter cake Once, take 500ml of the clear liquid and vacuum filter it with a slow qualitative filter paper. There must be no active carbon...

Embodiment 2

[0022] Take 0.8 tons of heavy components and mix them evenly on a stainless steel plate. Take a sample to measure the amount of 30wt.% liquid caustic soda needed for the complete reaction to generate sodium salt. For heavy components, stir while pouring, and collect the ethanol-containing solution with an alcohol mist absorption tower while reacting. The reaction time is 2.1 hours, and samples are taken to determine whether the reaction is complete. After the reaction is complete, demineralize the salt water (calculated according to undecane dibasic acid) to the acid content of 55g / L, add 0.5% (volume ratio) activated carbon to decolorize, use the filter cake again, and filter the clear liquid through the filter cake Once, take 500ml of the clear liquid and vacuum filter it with a slow qualitative filter paper. There must be no active carbon on the filter paper, which is the standard for the decolorized clear liquid. Use 93% sulfuric acid to acidify the crystal at 55-60°C, the...

Embodiment 3

[0024] Take 1.1 tons of heavy components and mix them evenly on a stainless steel plate. Take a sample to measure the amount of 30wt.% liquid caustic soda needed for the complete reaction to generate sodium salt. For heavy components, stir while pouring, and collect the ethanol-containing solution with an alcohol mist absorption tower while reacting. The reaction time is 2.9 hours, and samples are taken to determine whether the reaction is complete. After the reaction is complete, the processing industry demineralizes the salt water (calculated according to undecane dibasic acid) to an acid content of 70g / L, adds 0.5% (volume ratio) activated carbon for decolorization, and uses the filter cake again, and then filters the clear liquid through the filter cake Once, take 500ml of the clear liquid and vacuum filter it with a slow qualitative filter paper. There must be no active carbon on the filter paper, which is the standard for the decolorized clear liquid. Use 93% sulfuric ac...

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Abstract

The invention belongs to the technical field of solid waste recovery and regeneration, and in particular relates to a production method of mixed binary acid with a long carbon chain. The method comprises the following steps of: with heavy constituents remained after ethanol obtained in the dodecanedioic acid refining process is recovered as raw materials, enabling the heavy constituents to react with and a superfluous alkali solution at the temperature of 95-100 DEG C to generate sodium binary acid with a long carbon chain and ethanol; recovering the ethanol in the reaction process by using an alcohol fog recovery tower; and after the reaction is ended, carrying out aftertreatment on the obtained sodium salt to obtain the mixed binary acid with the long carbon chain. According to the invention, the heavy constituents remained after the ethanol obtained in the dodecanedioic acid refining process is recovered as raw materials and reacts with the superfluous alkali solution to generate the binary acid with the long carbon chain, and thus not only are wastes utilized, but also the environment pollution is reduced, and the benefit is increased.

Description

technical field [0001] The invention belongs to the technical field of solid waste recovery and regeneration, and in particular relates to a production method of a long carbon chain mixed dibasic acid. Background technique [0002] Long carbon chain dibasic acid refers to 8-20 carbon dibasic acid, which is a fine chemical product with wide application, used in the production of polyamide, musk essence, hot melt adhesive, lubricant for oil drilling, cutting agent, anti-corrosion Rust agents and other fields. The production methods of long carbon chain dibasic acid include chemical method and biological fermentation method. The chemical synthesis method is mainly used in foreign countries, which has harsh reaction conditions, high cost and serious pollution. Most of our products are produced by biological fermentation, with mild reaction conditions, low cost and little pollution. [0003] Long carbon chain mixed dibasic acid refers to 8-20 carbon dibasic acid, mainly for the...

Claims

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Application Information

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IPC IPC(8): C07C51/02C07C51/42C07C55/02C07C55/21C07C31/08C07C29/74
Inventor 苏庆旺尹海顺郝永军
Owner 山东广通新材料有限公司
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