Method for reusing contaminant separated from naphthalenesulfonic acid neutralization wash waste liquor

A technology of pollutants and naphthalenesulfonic acid, which is applied in the direction of neutralizing water/sewage treatment, adding substances to water/sewage treatment, etc., can solve the problems of unutilized active ingredients, large amount of chemical substances, high energy costs, etc., and achieve the elimination of secondary secondary pollution, low production cost and high economic benefit

Active Publication Date: 2005-03-16
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The prior art has two problems in the processing method of the chemical substances that pollute the environment separated from "naphthalenesulfonic acid neutralization and washing waste liquid": the one is that incineration produces secondary pollution; The amount of chemical substances that pollute the environment separated from the "waste and washing waste liquid" is still very large,

Method used

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  • Method for reusing contaminant separated from naphthalenesulfonic acid neutralization wash waste liquor
  • Method for reusing contaminant separated from naphthalenesulfonic acid neutralization wash waste liquor
  • Method for reusing contaminant separated from naphthalenesulfonic acid neutralization wash waste liquor

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Example Embodiment

[0033]Embodiment one: below is an embodiment of the present invention, has further described content of the invention of the present invention, and present embodiment is a kind of method that the pollutant that separates in " naphthalenesulfonic acid neutralizes washing waste liquid " reuses, First, 2000 grams of pollutants separated from the "naphthalenesulfonic acid neutralization washing waste liquid" are heated, evaporated and concentrated to 437 grams of "waste water concentrate" with a solid content of 59% by weight, and the "waste water concentrate" is placed in 2000ml In the four-necked round-bottomed flask, the oil bath is heated, and in the "wastewater concentrate", 196 grams of concentrated sulfuric acid with a weight concentration of 98% is added dropwise to adjust the total acidity to 27.5%. The amount of formaldehyde added dropwise is sulfonate group in the material. 0.8 times the number of moles is 45 grams. At a reaction temperature of 80°C and a relative pressu...

Example Embodiment

[0034] Embodiment 2: The following is another embodiment of the present invention, which continues to describe the content of the present invention. This embodiment is a method for reusing the pollutants separated from the "naphthalenesulfonic acid neutralization and washing waste liquid". Content is 30 kilograms of " waste water concentrated liquid " of 40% weight concentration, " waste water concentrated liquid " is placed in the reaction kettle, and in " waste water concentrated liquid ", dripping weight concentration is 15 kilograms of the concentrated sulfuric acid of 98%, total acidity Adjusted to 32%, the amount of formaldehyde added is 1.0 times the molar number of sulfonate radicals in the material to 4.2 kg, stirred at a reaction temperature of 150°C and a relative pressure of 0.4 MPa, and carried out a condensation reaction for 2 hours. After the condensation reaction was completed , cooled to 80°C, adding 40 kg of sodium hydroxide with a weight concentration of 30%...

Example Embodiment

[0035] Embodiment 3: The following is another embodiment of the present invention, which continues to describe the content of the present invention. This embodiment is a method for reusing the pollutants separated from the "naphthalenesulfonic acid neutralization and washing waste liquid" by adding naphthalenesulfonic acid and the mixture of methylnaphthalenesulfonic acid to obtain 30 kilograms of "wastewater concentrate" with a solid content of 70% weight concentration, "wastewater concentrate" is placed in the reactor, and the weight concentration is added dropwise in the "wastewater concentrate" Be 10 kilograms of the vitriol oil of 98%, total acidity is adjusted to 24%, the amount of adding formaldehyde is 1.0 times of sulfonate root molar number in the material is 4.2 kilograms, under the reaction temperature of 130 ℃ and 0.2 MPa relative pressure, stir , carry out the condensation reaction of 3 hours, after the condensation reaction is completed, cool to 80 ℃, add the so...

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Abstract

Disclosed is a method for reusing contaminant separated from naphthalenesulfonic acid neutralization wash waste liquor which consists of, concentrating the isolated polluted material into waste water concentration liquid with the solid material content being 40-70%, charging sulphuric acid into the waste water concentration liquid, adjusting the total acidify to be 24%-32%, charging methylene oxide into the waste water concentration liquid for condensation reaction, charging alkali for neutralization reaction, segregating the solid sulphate, thus obtaining the filter liquor, i.e. naphthalene family water reducing agent.

Description

technical field [0001] The invention relates to a treatment and reuse method of "naphthalenesulfonic acid neutralization and washing waste liquid" in the production process of 2-naphthol. In particular, it is a method to further utilize the chemical substances that pollute the environment separated from the "naphthalenesulfonic acid neutralization washing waste liquid". Background technique [0002] 2-Naphthol is a fine chemical intermediate, mainly used in the production of dyes and organic pigments, and also widely used in the pharmaceutical, pesticide, and leather industries. At present, the traditional method of domestic 2-naphthol production is to use refined naphthalene as raw material through sulfonation, hydrolysis, neutralization, alkali fusion, acidification, refining and other processes. Nearly 10 tons of filtered mother liquor and washing water, that is, "naphthalenesulfonic acid neutralization washing waste liquid". "Naphthalenesulfonic aci...

Claims

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Application Information

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IPC IPC(8): C02F1/66C02F1/68
Inventor 李学字魏春城胡俊杰董自斌成信荣
Owner BLUESTAR LEHIGH ENG INST CO LTD
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