CN1280123A

CN1280123A - Method for preparing J acid (7-amino-4-hydroxy-2-naphthalonesulfonic acid)

Info

Publication number: CN1280123A
Application number: CN 99109591
Authority: CN
Inventors: 陈之基; 贾丽云; 叶平
Original assignee: Tianjin Academy of Environmental Sciences
Current assignee: Tianjin Academy of Environmental Sciences
Priority date: 1999-07-13
Filing date: 1999-07-13
Publication date: 2001-01-17
Anticipated expiration: 2019-07-13
Also published as: CN1140507C

Abstract

Tobias acid is sulfonated in fuming sulfuric acid with high concentration SO3 and hydrolyzed in dilute sulfuric acid to produce 7-amino-4-hydroxy-2-naphthalenesulfonic monosodium salt which is then neutralized with and dissolved in sodium hydroxide to produce 7-amino-4-hydroxy-2-naphthalenesulfonic disodium salt solution; 7-amino-4-hydroxy-2-naphthalenesulfonic disodium solution is added slowly into cencentrated sodium hydroxide solution for alkaline fusion, and finally it is acidified in dilute sulfuric acid to produce J acid. The preparation process is simple, reliable, high in yield and low in environmental pollution, and the J acid product is high in quality and is used directly in preparing dye.

Description

J acid (7-amino-4-hydroxy-2-naphthene sulfonic acid) preparation method

The present invention relates to a kind of novel method by TOBIAS ACID 97MIN.﹠ 98MIN. (2-amino-1-naphthalene sulfonic aicd) preparation J acid.The chemical reaction flow process is expressed as follows:

J acid is widely used in preparing substantive dyestuff, matching stain and reactive dyestuffs as a kind of large important intermediate in the dyestuffs industries.

Traditional J acid preparation method is: TOBIAS ACID 97MIN.﹠ 98MIN. experiences two temperature sections and carries out two sulfonation reactions and three sulfonation reactions respectively in the not high oleum of sulphur trioxide concentration, generate 6-amino-1,3,5-naphthalene trisulfonic acid, hydrolysis is taken off sulfonation and is obtained amido-J-acid (6-amino-1,3-naphthalene disulfonic acid) in the dilute sulphuric acid medium subsequently, makes J acid through alkali fusion, acidifying again.

German patent DE 2842948 requires TOBIAS ACID 97MIN.﹠ 98MIN. to carry out two sulfonation reactions in 15～25 ℃ in sulphur trioxide concentration is 17～27% oleum, in sulphur trioxide concentration is to carry out three sulfonation reactions in 120～130 ℃ in 5～15% the oleum, makes amido-J-acid in 100～130 ℃ of reactions that are hydrolyzed in sulfuric acid concentration is 40～45% dilute sulphuric acid.Amido-J-acid is 80% to the molar yield of TOBIAS ACID 97MIN.﹠ 98MIN..

Swiss Patent CH635069 requires sodium hydroxide 75% strong solution of amido-J-acid double sodium salt solution and heat was added in 186～190 ℃ simultaneously lentamente that to add to another part concentration in the alkali-melting vessel in advance be to carry out the alkali fusion reaction in 75% the sodium hydroxide solution to make J acid in 3.4～4 hours.J acid is 88.5～91% to the molar yield of amido-J-acid.

Because the oleum concentration of using is low, so the oleum consumption is big, the amido-J-acid yield is not high, and the spent acid quantity that the sulfonation hydrolysis produces is big, and contaminate environment is serious.Because the mode that requires to adopt 75% soda-lye slowly to add is fed in raw material, the sodium hydroxide technical difficulty that crystallization is stopped up in pipeline appears easily.

The objective of the invention is to overcome the shortcoming that above-mentioned technology exists, adopt the oleum of high sulphur trioxide concentration to carry out sulfonation, whole concentrated base liquations all are added in the alkali-melting vessel, only slowly add amido-J-acid double sodium salt solution.Thereby improved yield, reduced pollution, made technological operation more reliable environment.

The objective of the invention is to realize according to following technological measure: the TOBIAS ACID 97MIN.﹠ 98MIN. shown in the II formula of 1/2 amount adds in quantitative 20% oleum in 30～40 ℃, add subsequently quantitative 65% oleum (add 20% and 65% concentration oleum just to be made into sulphur trioxide concentration be 28～40% oleum, sulphur trioxide is 2.4-3.0 to the mol ratio of TOBIAS ACID 97MIN.﹠ 98MIN.) thereupon in 40～45 ℃ of TOBIAS ACID 97MIN.﹠ 98MIN. that add other 1/2 amount, generate III formula compound, be warming up to 110-130 ℃ of insulation effect 3-6 hour, generate the 6-amino-1 shown in the IV formula, 3, the 5-naphthalene trisulfonic acid, hydrolysis afterwards, crystallization is separated out in cooling, filtering separation obtains the amido-J-acid list sodium salt filter cake (is 88.92% to the TOBIAS ACID 97MIN.﹠ 98MIN. molar yield) shown in the V formula, it is dissolved in the amido-J-acid double sodium salt solution that obtains in the liquid caustic soda shown in the VI, compound VI (concentration is 65-75%) after concentrating slowly evenly is added in 3.5～4 hours in 186～190 ℃ carries out the alkali fusion reaction in the heat alkali liquid that concentration is 70-75%, last acid out filtering separation obtains the product J acid shown in the I formula (molar yield to the amido-J-acid double sodium salt is 88.66%).

The invention has the advantages that: the inventive method compared with prior art has the minimizing environmental pollution, the yield height, and technological operation is simplified, and is more reliable.Good product quality can be directly used in the preparation dyestuff.

Umber among the present invention embodiment subsequently and ratio are all by weight.

Embodiment

Be used for intermittently preparation

(A) two sulfonation

Adding concentration in the four-necked bottle of 1000 milliliters of dried and clean that the tetrafluoroethylene anchor stirrer is housed is 930 parts of 20% oleums (folding 100%SO ₃186 parts, 2.325 mole), start and stir in 30～40 ℃, adding content by the stainless steel funnel in 40～60 minutes is that 98% TOBIAS ACID 97MIN.﹠ 98MIN. (is rolled over 100%167.25 parts for 170.7 parts, 0.75 mole), finished the equality of temperature stirring action 30 minutes, ice-water bath is lowered the temperature, and is 267.7 parts of (folding 100%SO of oleum of 65% in 30～40 ℃ of adding concentration ₃174 parts, 2.175 mole), finished stirring action 30 minutes, in 40～45 ℃, adding content by the stainless steel funnel in 40～60 minutes is that 98% TOBIAS ACID 97MIN.﹠ 98MIN. (is rolled over 100%167.25 parts for 170.7 parts, 0.75 mole), in 40～45 ℃ of insulated and stirred effects 2 hours, all dissolve to material.

(B) three sulfonation

Slowly be warming up to 80 ℃ in 15～20 minutes, in 80～90 ℃ of effects 1 hour, slowly be warming up to 110 ℃ in 20～30 minutes subsequently, in 110 ± 2 ℃ of insulation effects 7 hours, water-bath was cooled to 60～70 ℃, prepared to dilute.

(C) hydrolysis

In being housed, 3000 milliliters of four-necked bottles of tetrafluoroethylene anchor stirrer and glass reflux exchanger add 1701 parts of 50～60 ℃ of hot water, start that stir to add content be 98% 555.4 parts of anhydrous sodium sulphate (roll over 100%544.3 parts), stirring action 30 minutes is to dissolving.Cooled sulfonated bodies added in 15～20 minutes in the sodium sulfate water in 80～110 ℃, was warming up to 115 ℃ in 20～30 minutes, and in 115～120 ℃ of backflow effects 3 hours, ice-water bath was cooled to 20 ℃, in 15～20 ℃ of insulation effects 6 hours, to separating out fully.Suction filtration is after draining, at twice, each with 190 parts of (sodium sulfate concentration 16%, sulfuric acid content are 1.8%) washing leaching cakes of sodium bisulfate water, drain, obtain 858 parts of filter cakes, content 50.52% (rolling over 100%433.45 parts, acidity 11.56%) is 88.92% to the molar yield of TOBIAS ACID 97MIN.﹠ 98MIN..

The liquid-phase chromatographic analysis data of the amido-J-acid filter cake that is obtained are:

Unknown material 1.15%, amido-J-acid 96.44%, amino G acid 0.46%, 2-naphthylamines-5-sulfonic acid 1.95%.Annotate: it is that the sulphur trioxide total concn is 40% that the oleum of 20% and 65% two kind of concentration of adding among the embodiment just can be made into 40% oleum, and sulphur trioxide is 3.0 to the mol ratio of TOBIAS ACID 97MIN.﹠ 98MIN..

(D) dissolving

Take by weighing 804.2 parts of above-mentioned amido-J-acid filter cakes and (roll over 100%406.25 parts, 1.25 mole), be dissolved to pH value of solution=8.0-8.5 with 42% sodium hydroxide solution, 631.3 parts (concentration is 68.71% to get amido-J-acid double sodium salt solution after concentrating, 1.25 mole), prepare alkali fusion.

(E) alkali fusion

In 2 liter stainless steel alkali-melting vessels, add content and be 96% sheet alkali 231.3 parts (rolling over 100%222.1 parts) and content and be 42% 185 parts of liquid caustic soda (rolling over 100%77.7 parts), heating for dissolving (just is 72% sodium hydroxide solution for concentration, roll over 100%300 parts, 7.5 mole), first-class alkali-melting vessel, start stirring, rose to 186 ℃ in 30-40 minute, in 186-190 ℃, 3.5-4 evenly drip aforementioned amido-J-acid double sodium salt solution within hour, finish in 188-190 ℃ and continued insulation effect 4.5-4.0 hour, stop heating, install reflux exchanger, in 30-40 minute, slowly drip 675 parts of dilutions of 70-90 ℃ of hot water alkali fusion thing, finishing temperature is 110-120 ℃, is cooled to below 90 ℃ in water-bath in 10-15 minute, prepares acid out.

(F) acid out

In 3000 ml beakers, add 600 parts in water, start stirring, adding content is 92.5% 569.5 parts in sulfuric acid (rolling over 100%526.75 parts), in the sulfuric acid after 90-95 ℃ the alkali fusion thing after the handle dilution slowly adds to dilution equably by dropping funnel within 1-1.5 hour, finish in 90-95 ℃ and drove sulfurous gas 1-2 hour, until the titanium dioxide thiol to the greatest extent, keeping pH value of solution in the whole process all the time is that congo-red test paper presents acidity, be cooled to 65-70 ℃, adjusting volume is 2250 milliliters.Suction filtration, with 750 parts of 50-60 ℃ of hot water, divide three washing leaching cakes, to wash water pH is that congo-red test paper presents neutrality, drain, obtain 342.4 parts of J acidleach cakes, content is 77.36% (to roll over 100%264.88 parts, dried dry product content is 97.33%) be 88.66% to the molar yield of amido-J-acid, be 78.84% to the mole total recovery of TOBIAS ACID 97MIN.﹠ 98MIN..

The J acid solution analysis of hplc data that obtain are:

Amido-J-acid 0.32%, unknown material 0.51%, γ acid 0.49%, J acid 98.34%, 2-naphthylamines-5-sulfonic acid 0.23%, two J acid do not detect.

This J acid product is used to prepare C.I. sun blue 71.It is 186.27% that the dyestuff that is obtained is measured intensity through UV, overlaps fully at 200～800nm with SUMITOMO CHEMICAL chemistry Sumilight Supra Blue BRR from the UV spectrogram, has reached SUMITOMO CHEMICAL chemical company standard level.

Claims

1, a kind of preparation method who obtains J acid (7-amino-4-hydroxy-2-naphthene sulfonic acid) by TOBIAS ACID 97MIN.﹠ 98MIN. (2-amino-1-naphthalene sulfonic aicd), it is characterized in that: TOBIAS ACID 97MIN.﹠ 98MIN. is carried out two sulfonation in 30-45 ℃ and is obtained 6-amino-1 in oleum, the 5-naphthalene disulfonic acid, being heated to 110-130 ℃ carries out three sulfonation and obtains 6-amino-1,3, the 5-naphthalene trisulfonic acid, this trisulfonic acid obtains amido-J-acid (6-amino-1 in 115-120 ℃ of hydrolysis in concentration is the dilute sulphuric acid of 40-45%, the 3-naphthalene disulfonic acid), amido-J-acid crystallization in sulfuric acid-water-sodium sulfate medium is separated out to separate and is obtained amido-J-acid list sodium salt, in the sodium hydroxide solution and concentrate the amido-J-acid double sodium salt solution obtain and add in 186-190 ℃ and carry out alkali fusion in the strong caustic, thin up, the alkali fusion thing after the dilution adds in the dilute sulphuric acid acidizing crystal in 90-95 ℃ and separates out to separate and make J acid.

2, require 1 according to patent, two sulfonation are to take 20% oleum → 1/2 amount TOBIAS ACID 97MIN.﹠ 98MIN. → 65% oleum → 1/2 amount TOBIAS ACID 97MIN.﹠ 98MIN. over-over mode to feed in raw material, sulfonated sulphur trioxide total concn is 28-40%, hydrolysis and crystallization all are to carry out in sulfuric acid concentration is sulfuric acid-water-sodium sulfate of 40-45%, separate and obtain amido-J-acid list sodium salt filter cake, filter cake neutralizes with sodium hydroxide, concentrating and obtaining concentration is that the concentration that the amido-J-acid double sodium salt solution of 65-75% will evenly slowly be added drop-wise in the alkali-melting vessel in 3.5-4 hour is in the sodium hydroxide solution of 70-75%, reinforced finishing, continue at 188-190 ℃ of effect 4.5-4.0 hour, subsequently with hot water dilution alkali fusion thing, alkali fusion thing after the dilution will evenly be added in 1-1.5 hour and drive sulfurous gas in the dilute sulphuric acid, and acidizing crystal is separated out to separate and obtained J acid.

3, require 1 and 2 according to patent, two sulfonation temperatures are 30-45 ℃, and three sulfonation temperatures are 110-130 ℃, act on 3-6 hour, the temperature of hydrolysis is 115-120 ℃, act on 1-3 hour, the temperature that amido-J-acid list sodium salt crystal is separated out is 15-20 ℃, acts on 4-6 hour, the alkali fusion charge temperature is 186-190 ℃, the alkali fusion holding temperature is 188-190 ℃, and acid out feeds in raw material, drives temperature 90-95 ℃ of sulfurous gas, and it is 65-70 ℃ that the J acid out goes out temperature.

4, according to patent 1,2 and 3, the mol ratio of sulphur trioxide and TOBIAS ACID 97MIN.﹠ 98MIN. is 2.4-3.0, and the mol ratio of sodium hydroxide and amido-J-acid double sodium salt is 4.0-15.0.

5, require 1,2,3 and 4 according to patent, the sulphur trioxide total concn of oleum is 28-40%, and the amido-J-acid double sodium salt concentration after concentrating is 65-75%, and alkali fusion is 70-75% with the concentration of sodium hydroxide solution.

6, require 1,2,3,4 and 5 according to patent, can take the vacuum filtration method to filter amido-J-acid list sodium salt, better method is to adopt filter press technique to carry out filtering separation.And J acid adopts the vacuum filtration method to separate.

7, require 1,2,3,4, the 5 and 6 J acid that make to need not to be further purified according to patent, can be directly used in the preparation of dyestuff.