CN104496861A - Preparation method of 1-naphthylamine8-sulfoacid - Google Patents
Preparation method of 1-naphthylamine8-sulfoacid Download PDFInfo
- Publication number
- CN104496861A CN104496861A CN201510011635.6A CN201510011635A CN104496861A CN 104496861 A CN104496861 A CN 104496861A CN 201510011635 A CN201510011635 A CN 201510011635A CN 104496861 A CN104496861 A CN 104496861A
- Authority
- CN
- China
- Prior art keywords
- naphthalene
- sulfonic
- acid
- preparation
- react
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to a preparation method of 1-naphthylamine8-sulfoacid. The preparation method comprises the following steps: dissolving naphthalene in sulfuric acid at 35-45 DEG C and then reacting for 2-3 hours to obtain 1-naphthalene sulfonic acid; then, carrying out reaction on the product 1-naphthalene sulfonic acid and a mixed acid of nitric acid and sulfuric acid at 30-95 DEG C to generate 1-sulfonic 8-nitronaphthalene; and carrying out reaction on the product 1-sulfonic 8-nitronaphthalene, iron powder and water steam at 60-180 DEG C to generate 1-naphthylamine8-sulfoacid.
Description
The preparation method of naphthalidine 8-sulfonic acid of the present invention belongs to chemical field, relates to the preparation of fine chemicals, specifically a kind of preparation method of naphthalidine 8-sulfonic acid.
Naphthalidine 8-sulfonic acid is 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 preparing naphthalidine 8-sulfonic acid.
Object of the present invention can be realized by following steps:
(1) preparation method of naphthalidine 8-sulfonic acid of the present invention take naphthalene as raw material, is first melted in sulfuric acid by naphthalene at 35-45 DEG C, then reacts 2-3 hour, obtain 1-naphthalene sulfonic aicd, and the chemical formula of this reaction is as follows:
(2) reacted by the mixing acid of above-mentioned product 1-naphthalene sulfonic aicd and nitric acid and sulfuric acid, generate 1-sulfonic group 8-nitro-naphthalene, react and carry out at 30-95 DEG C, the chemical formula of this reaction is as follows:
(3) above-mentioned product 1-sulfonic group 8-nitro-naphthalene and iron powder and water vapour are reacted, generate 1-. naphthylamines 8-sulfonic acid, react and carry out at 60-180 DEG C, chemical formula of this reaction is as follows:
Advantage of the present invention:
The sulfur oxide waste gas produced in production is applied in production as sulfuric acid after can absorbing with falling-film absorber, alleviates environmental pollution.
Be described in further detail below by embodiment:
Produce 1000 tons of naphthalidine 8-sulfonic acid production equipments per year, first naphthalene is melted in sulfuric acid at 35-45 DEG C, then react 2-3 hour, obtain 1-naphthalene sulfonic aicd; Then the mixing acid of above-mentioned product 1-naphthalene sulfonic aicd and nitric acid and sulfuric acid is reacted, generate 1-sulfonic group 8-nitro-naphthalene, react and carry out at 30-95 DEG C; Above-mentioned product 1-sulfonic group 8-nitro-naphthalene and iron powder and water vapour react by the 3rd step, generate naphthalidine 8-sulfonic acid, react and carry out at 60-180 DEG C.
Claims (1)
1.1-the preparation method of naphthylamines 8-sulfonic acid, is characterized in that: the preparation method of (1) naphthalidine 8-of the present invention sulfonic acid take naphthalene as raw material, is first melted in sulfuric acid by naphthalene at 35-45 DEG C, then react 2-3 hour, obtain 1-naphthalene sulfonic aicd;
(2) mixing acid of above-mentioned product 1-naphthalene sulfonic aicd and nitric acid and sulfuric acid is reacted, generate 1-sulfonic group 8-nitro-naphthalene, react and carry out at 30-95 DEG C;
(3) above-mentioned product 1-sulfonic group 8-nitro-naphthalene and iron powder and water vapour are reacted, generate naphthalidine 8-sulfonic acid, react and carry out at 60-180 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011635.6A CN104496861A (en) | 2015-01-05 | 2015-01-05 | Preparation method of 1-naphthylamine8-sulfoacid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011635.6A CN104496861A (en) | 2015-01-05 | 2015-01-05 | Preparation method of 1-naphthylamine8-sulfoacid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104496861A true CN104496861A (en) | 2015-04-08 |
Family
ID=52938335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510011635.6A Pending CN104496861A (en) | 2015-01-05 | 2015-01-05 | Preparation method of 1-naphthylamine8-sulfoacid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104496861A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481728A (en) * | 2015-12-25 | 2016-04-13 | 铜陵化工集团有机化工有限责任公司 | Preparation method of 1-naphthylamino-8-sulfonic acid |
-
2015
- 2015-01-05 CN CN201510011635.6A patent/CN104496861A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481728A (en) * | 2015-12-25 | 2016-04-13 | 铜陵化工集团有机化工有限责任公司 | Preparation method of 1-naphthylamino-8-sulfonic acid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103539210A (en) | Preparation method of cobalt molybdate microcrystals | |
| CN103159191A (en) | Preparation method of hydroxylamine salt | |
| JP2007520512A5 (en) | ||
| CN103304420A (en) | Clean preparation method of 2, 4-dichloro-3, 5-dinitrobenzotrifluoride | |
| CN102295585A (en) | Preparation method of 2-naphthylamine 6,8 disulfonic acid | |
| CN104496861A (en) | Preparation method of 1-naphthylamine8-sulfoacid | |
| CN103288688A (en) | Preparation method of 1-naphthylamine 5-sulfonic acid | |
| CN102875435A (en) | Organic thiosulfuric acid derivative preparation method | |
| CN103288689A (en) | Preparation method of 1-naphthylamine 8-sulfonic acid | |
| CN102304216A (en) | Preparation of bisphenol-S epoxy resin through precipitation | |
| CN104557721A (en) | Method for producing 5,5-dimethylhydantoin | |
| CN104496862A (en) | Preparation method of 1-naphthylamine5-sulfonate | |
| CN102702032A (en) | Synthesis method of guanidinoacetic acid | |
| CN102838513A (en) | Preparation method of 2-naphthylamine 3, 6, 8 trisulfonic acid | |
| CN104370830A (en) | Synthetic method of 5-trifluoromethyl uracil | |
| CN108947868B (en) | Preparation process of 2, 4-difluorobenzonitrile | |
| CN105562070A (en) | Modified MoS2-Me/HZSM-5 catalyst preparation method | |
| CN102584554A (en) | Method for preparing raspberry ketone in acidic ionic liquid | |
| CN104592045A (en) | One-step synthetic method of didodecyl gamma-diquaternium salt | |
| CN103709081B (en) | A kind of preparation method of thiosemicarbazide | |
| CN112047830A (en) | Preparation method and application of calcium rosinate | |
| CN105152984A (en) | Continuous synthetic method of nitroguanidine | |
| CN104557693B (en) | A kind of synthetic method of 3,5-Dimethyl-4-nitropyridine-N-oxide | |
| CN104693074A (en) | Preparation method of 2-amino-4-sulfo-6-acetaminophenol | |
| CN101531620A (en) | Method for preparing methoxyl-isourea hydrosulfate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150408 |