CN1696081A

CN1696081A - Method for removing hydroquinone from chemical products

Info

Publication number: CN1696081A
Application number: CN 200410020539
Authority: CN
Inventors: 佟庆杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-05-14
Filing date: 2004-05-14
Publication date: 2005-11-16

Abstract

A process for removing the hydroquinone used as polymerization inhibitor from chemical product includes adding excessive hydrogen peroxide to the chemical product, heating, stirring, reaction and adding ammonia or ammonia water.

Description

A kind of method of removing Resorcinol in the Chemicals

Technical field: the present invention relates to a kind of method of in the chemical process of making stopper with Resorcinol, removing Resorcinol in the Chemicals.

Background technology: utilizing vinylbenzene, divinyl, the different diene of defending, vinyl acetate between to for plastic, during monomer production chemical products such as vinyl cyanide, because easily polymerization of these chemical substances itself, need make stopper with Resorcinol for preventing its polymerization, but Resorcinol easy oxidation under ingress of air or illumination condition is brown, oxidation is faster under alkaline condition, influence product color and quality in the product for preventing that it from remaining in, generally all be hydro-oxidation sodium in Chemicals at present, make hydroquinone oxidation, hydroquinone oxidation thing and sodium hydroxide are deposited in the still kettle after distilling, deposition is big, and settling is removed difficulty and lost Chemicals.

Summary of the invention: the purpose of this invention is to provide settling in a kind of minimizing still kettle, and reduce the method for Resorcinol in the removing Chemicals of Chemicals loss.

The object of the present invention is achieved like this: doing with Resorcinol in the chemical process of stopper, in order to remove Resorcinol, we add excessive hydrogen peroxide in Chemicals, the stirring of heating, and give the reaction times sufficiently, make the Resorcinol promote the oxidation, for making reaction more thorough, we add an amount of ammonia or ammoniacal liquor again in Chemicals, and are used to destroy unnecessary hydrogen peroxide, and what the settling in the process distillation still kettle was main has just had only the hydroquinone oxidation thing.Advantage is the settling that has reduced in the still kettle of distillation back, has made things convenient for cleaning in the still, and has reduced the loss of Chemicals, has reduced material consumption, has improved production efficiency.

Embodiment: doing with Resorcinol in the chemical process of stopper, in Chemicals, add excessive hydrogen peroxide (Resorcinol relatively), heat (boiling point that had better not surpass hydrogen peroxide), stir, and after giving sufficiently the reaction times, make the Resorcinol promote the oxidation, in Chemicals, add an amount of ammonia or ammoniacal liquor again.

To produce tetramethylene sulfone is example, in process of production, the mixture that in divinyl or sulfurous gas, adds Resorcinol or Resorcinol and other Chemicals, generate cyclobufene sultone through chemical combination, behind hydrogenation, get tetramethylene sulfone, we add excess hydrogen peroxide (Resorcinol relatively) in tetramethylene sulfone, heat (boiling point that had better not surpass hydrogen peroxide), stir and give the competent reaction times, for making hydroquinone oxidation more thorough and destroy remaining hydrogen peroxide, can add an amount of ammonia or ammoniacal liquor, directly discharge for preventing ammonia or ammoniacal liquor, should reduce the temperature of sulfolane solution this moment.

Claims

1, a kind of method of removing Resorcinol in the Chemicals is characterized in that doing with Resorcinol in the chemical process of stopper, adds excessive hydrogen peroxide in Chemicals, makes hydroquinone oxidation.

2,, it is characterized in that in Chemicals, adding an amount of ammonia or ammoniacal liquor according to the method for Resorcinol in the described removing Chemicals of claim 1.

3, a kind of method of removing Resorcinol in the Chemicals, in producing the tetramethylene sulfone process, the mixture that in divinyl or sulfurous gas, adds Resorcinol or Resorcinol and other Chemicals, produce cyclobufene sultone through chemical combination, get tetramethylene sulfone behind the hydrogenation, it is characterized in that in tetramethylene sulfone, adding excessive hydrogen peroxide, heat, stir and give the reaction times sufficiently.

4, according to the method for Resorcinol in the described removing Chemicals of claim 3, it is characterized in that to add an amount of ammonia or ammoniacal liquor.