CN102295585A - Preparation method of 2-naphthylamine 6,8 disulfonic acid - Google Patents
Preparation method of 2-naphthylamine 6,8 disulfonic acid Download PDFInfo
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- CN102295585A CN102295585A CN2011101752558A CN201110175255A CN102295585A CN 102295585 A CN102295585 A CN 102295585A CN 2011101752558 A CN2011101752558 A CN 2011101752558A CN 201110175255 A CN201110175255 A CN 201110175255A CN 102295585 A CN102295585 A CN 102295585A
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- disulfonic acid
- naphthylamines
- reaction
- beta naphthal
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Abstract
The invention relates to a preparation method of 2-naphthylamine 6,8 disulfonic acid. First, 2-naphthol is melted in fuming sulphuric acid for a 2-3h reaction to obtain 2-naphthol 6,8 disulfonic acid; second, the 2-naphthol 6,8 disulfonic acid reacts with potassium chloride to generate 2-naphthol 6,8 disulfonic acid potassium; third, the product 2-naphthol 6,8 disulfonic acid potassium reacts with ammonia water to generate 2-naphthylamine 6,8 disulfonic acid potassium; fourth, the product 2-naphthylamine 6,8 disulfonic acid potassium reacts with hydrochloric acid to generate 2-naphthylamine 6,8 disulfonic acid.
Description
The preparation method of 2-naphthylamines 6,8 disulfonic acid of the present invention belongs to chemical field, relates to the preparation of fine chemicals, is a kind of preparation method of 2-naphthylamines 6,8 disulfonic acid specifically.
2-naphthylamines 6,8 disulfonic acid are a kind of fine chemicals, can be used for preparing dyestuff, medicine, agricultural chemicals etc.
The object of the present invention is to provide a kind of method of preparation 2-naphthylamines 6,8 disulfonic acid.
Purpose of the present invention can realize by following steps:
(1) preparation method of 2-naphthylamines 6,8 disulfonic acid of the present invention is to be raw material with the beta naphthal, at first beta naphthal is melted in the oleum under 25-35 ℃, be heated to 150-170 ℃ of reaction 2-3 hour then, obtain beta naphthal 6,8 disulfonic acid, the chemical formula of this reaction is as follows:
(2) with above-mentioned product beta naphthal 6,8 disulfonic acid and Repone K reaction, generate beta naphthal 6,8 disulfonic acid potassiums, be reflected under 30-95 ℃ and carry out, the chemical formula of this reaction is as follows:
(3) with above-mentioned product beta naphthal 6,8 disulfonic acid potassiums and ammoniacal liquor reaction, generate 2-naphthylamines 6,8 disulfonic acid potassiums, be reflected under 0.4-1.2Mpa, 60-180 ℃ and carry out, the chemical formula of this reaction is as follows:
(4) with above-mentioned product 2-naphthylamines 6,8 disulfonic acid potassiums and hydrochloric acid reaction, generate 2-naphthylamines 6,8 disulfonic acid, be reflected under 40-160 ℃ and carry out, the chemical formula of this reaction is as follows:
Advantage of the present invention:
1, the sulfur oxide waste gas that produces in the production be applied to alleviate environmental pollution in the production as sulfuric acid after can absorbing with falling-film absorber;
2, (4) step during the hydrogen chloride emission that produces in the production can be applied to produce as hydrochloric acid with falling-film absorber absorption back reacts, the Repone K that the reaction of (4) step produces can be used for the reaction of (2) step, recycle, avoided environmental pollution, reduced production cost;
3, there are not waste water, waste sludge discharge in the production.
Be described in further detail below by embodiment:
Produce 1000 tons of 2-naphthylamines 6,8 disulfonic acid production equipments per year, at first beta naphthal is melted in the oleum under 25-35 ℃, be heated to 150-170 ℃ of reaction 2-3 hour then, obtain beta naphthal 6,8 disulfonic acid; With above-mentioned product beta naphthal 6,8 disulfonic acid and Repone K reaction, generate beta naphthal 6,8 disulfonic acid potassiums then, be reflected under 30-95 ℃ and carry out; The 3rd step generated 2-naphthylamines 6,8 disulfonic acid potassiums with above-mentioned product beta naphthal 6,8 disulfonic acid potassiums and ammoniacal liquor reaction, was reflected under 0.4-1.2Mpa, 60-180 ℃ and carried out; The 4th step generated 2-naphthylamines 6,8 disulfonic acid with above-mentioned product 2-naphthylamines 6,8 disulfonic acid potassiums and hydrochloric acid reaction, was reflected under 40-160 ℃ and carried out.
Claims (1)
1.2-naphthylamines 6, the preparation method of 8 disulfonic acid, it is characterized in that: (1) 2-naphthylamines 6 of the present invention, the preparation method of 8 disulfonic acid is to be raw material with the beta naphthal, at first beta naphthal is melted in the oleum under 25-35 ℃, be heated to 150-170 ℃ of reaction 2-3 hour then, obtain beta naphthal 6,8 disulfonic acid;
(2) with above-mentioned product beta naphthal 6,8 disulfonic acid and Repone K reaction, generate beta naphthal 6,8 disulfonic acid potassiums, be reflected under 30-95 ℃ and carry out;
(3) with above-mentioned product beta naphthal 6,8 disulfonic acid potassiums and ammoniacal liquor reaction, generate 2-naphthylamines 6,8 disulfonic acid potassiums, be reflected under 0.4-1.2Mpa, 60-180 ℃ and carry out;
(4) with above-mentioned product 2-naphthylamines 6,8 disulfonic acid potassiums and hydrochloric acid reaction, generate 2-naphthylamines 6,8 disulfonic acid, be reflected under 40-160 ℃ and carry out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101752558A CN102295585A (en) | 2011-06-21 | 2011-06-21 | Preparation method of 2-naphthylamine 6,8 disulfonic acid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101752558A CN102295585A (en) | 2011-06-21 | 2011-06-21 | Preparation method of 2-naphthylamine 6,8 disulfonic acid |
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| CN102295585A true CN102295585A (en) | 2011-12-28 |
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| CN2011101752558A Pending CN102295585A (en) | 2011-06-21 | 2011-06-21 | Preparation method of 2-naphthylamine 6,8 disulfonic acid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102807512A (en) * | 2012-08-02 | 2012-12-05 | 李安民 | Method for producing 2-naphthol 6,8 potassium hydrazinodisulfonate by partial circulation of mother liquor |
| CN104030948A (en) * | 2014-06-24 | 2014-09-10 | 湖北鑫慧化工有限公司 | New process of amino G acid ammonification production |
| CN106831500A (en) * | 2017-01-19 | 2017-06-13 | 南通海之阳膜化工有限公司 | A kind of preparation method of G salt and its accessory substance R salt |
| CN110229083A (en) * | 2019-06-27 | 2019-09-13 | 九江学院 | A kind of preparation method of G salt |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4551283A (en) * | 1983-08-17 | 1985-11-05 | Ciba Geigy Ag | Process for isolating 2-naphthylamine-3,6,8-trisulfonic acid in the form of the monopotassium or monoammonium salt |
| CS261311B1 (en) * | 1987-07-30 | 1989-01-12 | Jan Kroupa | Method of 2-naphthylamine-6,8-disulphonic acid production |
| CN101161640A (en) * | 2007-11-16 | 2008-04-16 | 王在军 | Preparation technique of 2-amido-3,6,8-naphthalenetrisulphonic acid |
| CN101182301A (en) * | 2007-11-26 | 2008-05-21 | 浙江海晨化工有限公司 | Method for preparing 2-amido-8-naphthol-6-sulfonic acid |
-
2011
- 2011-06-21 CN CN2011101752558A patent/CN102295585A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4551283A (en) * | 1983-08-17 | 1985-11-05 | Ciba Geigy Ag | Process for isolating 2-naphthylamine-3,6,8-trisulfonic acid in the form of the monopotassium or monoammonium salt |
| CS261311B1 (en) * | 1987-07-30 | 1989-01-12 | Jan Kroupa | Method of 2-naphthylamine-6,8-disulphonic acid production |
| CN101161640A (en) * | 2007-11-16 | 2008-04-16 | 王在军 | Preparation technique of 2-amido-3,6,8-naphthalenetrisulphonic acid |
| CN101182301A (en) * | 2007-11-26 | 2008-05-21 | 浙江海晨化工有限公司 | Method for preparing 2-amido-8-naphthol-6-sulfonic acid |
Non-Patent Citations (1)
| Title |
|---|
| 刘福德等: ""氨基G酸及2-萘胺-3,6,8-三磺酸的合成研究"", 《化学工业与工程》, vol. 15, no. 1, 28 February 1998 (1998-02-28) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102807512A (en) * | 2012-08-02 | 2012-12-05 | 李安民 | Method for producing 2-naphthol 6,8 potassium hydrazinodisulfonate by partial circulation of mother liquor |
| CN104030948A (en) * | 2014-06-24 | 2014-09-10 | 湖北鑫慧化工有限公司 | New process of amino G acid ammonification production |
| CN106831500A (en) * | 2017-01-19 | 2017-06-13 | 南通海之阳膜化工有限公司 | A kind of preparation method of G salt and its accessory substance R salt |
| CN110229083A (en) * | 2019-06-27 | 2019-09-13 | 九江学院 | A kind of preparation method of G salt |
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Application publication date: 20111228 |