DE212018000065U1 - Production system for naphthalenesulfonic acid - Google Patents

Abstract

A naphthalenesulfonic acid production system, characterized in that the production system comprises a side-by-side reaction vessel, a degasser, a naphthalene-water mixture collecting device, a naphthalene-water separation device, and a preliminary tank connected to a discharge port of the degasser Fertiggutbehälter, wherein the pre-tank is connected in each case with the reaction vessel and the finished goods container; wherein the reaction vessel comprises a vessel body, a thermometer provided at the bottom of the vessel body for detecting the internal temperature, a pressure gauge provided at the top of the vessel body for detecting the internal pressure, and a drain pipe connected to a drain port disposed at the top of the vessel body and a cooling device provided at the bottom of the vessel body for cooling the inner material, wherein on the boiler body also an opening and closing cover is provided which serves to open and close the discharge opening and is located within the discharge tube, wherein the opening and closing cover is an upwardly convex, arcuate cover plate, wherein a Side of the arcuate cover plate is rotatably connected to the boiler body and the other side is provided on the boiler body; further comprising a naphthalene container and a sulfuric acid container, wherein the naphthalene container and the sulfuric acid container are respectively connected to the top of the boiler body, wherein a naphthalene outlet opening of the separator is connected to the naphthalene container.

Description

TECHNICAL AREA

The present utility model relates in particular to a production system for naphthalenesulfonic acid.

STATE OF THE ART

An α-naphthalenesulfonic acid and a β-naphthalenesulfonic acid in naphthalenesulfonic acid are used in the preparation of dye intermediates such as 1-naphthol, 2-naphthol, 1-naphtholsulfonic acid, 2-naphtholsulfonic acid, 1-naphthylamine sulfonic acid and 2-naphthylamine sulfonic acid. At present, the α-naphthalenesulfonic acid and β-naphthalenesulfonic acid are generally produced by sulfonating reaction of naphthalene and a sulfonating agent. The consumption of sulfuric acid in the sulfonation reaction is large, which leads to high production costs and difficulties in the effective separation of the sulfonation reaction mixture, resulting in considerable difficulties for the subsequent work stages. For example, the amount of sodium sulfite consumed in the subsequent neutralization section is large, and a large amount of high salinity organic sewage and a large amount of sulfur dioxide gas are generated, which can cause severe equipment line corrosion damage and severe environmental pollution. And at the same time, the use of the naphthalene bubble process in the subsequent removal of naphthalene results in some decomposition of naphthalenesulfonic acid.

CONTENTS OF THE PRESENT INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and to provide an improved naphthalenesulfonic acid production system capable of realizing basic production automation and having little environmental impact and high production efficiency.

This technical problem is solved by the production system according to the invention for naphthalenesulfonic acid. Here, the naphthalenesulfonic acid production system of the present invention, a side-by-side reaction vessel, a degasser, a naphthalene-water mixture collecting device, a naphthalene-water separating device, and a preliminary tank connected to an outlet port of the degasser and a finished product container the preliminary tank is connected respectively to the reaction vessel and the finished goods container, the reaction vessel comprising a boiler body, a thermometer provided at the bottom of the boiler body for detecting the internal temperature, a pressure gauge provided at the top of the boiler body for detecting the internal pressure, and one with an upper part of the boiler body arranged emptying opening connected drain pipe and provided at the bottom of the boiler body cooling device for cooling the inner material, wherein the boiler body further comprises an opening and Schließdec The opening and closing cover is an upwardly convex, arcuate cover plate, wherein one side of the arcuate cover plate is rotatably connected to the boiler body and the other side is provided on the boiler body;

The production system of the present invention further comprises a naphthalene container and a sulfuric acid container, wherein the naphthalene container and the sulfuric acid container are respectively connected to the top of the vessel body, wherein a naphthalene outlet opening of the separator is connected to the naphthalene container.

Preferably, the production system according to the invention further comprises a vacuum pump connected to the upper part of the collecting device and a clear water collecting tank connected to a water outlet of the separating device and the upper part of the collecting device, respectively.

Preferably, the diameter of the arcuate cover plate is greater than half the inner diameter of the discharge tube.

According to the embodiment of the production system according to the invention, the following advantages are achieved over the prior art.

With the aid of the production system according to the invention essentially an automatic production can be realized. In addition, the supply and discharge can be controlled stably and also the naphthalene can be recovered to recycle it. There is basically no wastewater drain, which is environmentally friendly. And at the same time, the use of the naphthalene bubble process in the prior art and the hydrolysis of naphthalenesulfonic acid during the naphthalene bubbling process can be avoided.

list of figures

• 1 eine schematische Gesamtstrukturdarstellung des erfindungsgemäßen Produktionssystems für Naphthalinsulfonsäure ist;
• 2 eine vergrößerte schematische Darstellung eines Abschnitts A in 1 ist; und
• 3 eine schematische Strukturdarstellung eines Steuerabschnitts ist.

Hereinafter, the present invention will be described with reference to drawings and a preferred embodiment, wherein

• 1 is a schematic overall structural representation of the production system according to the invention for naphthalenesulfonic acid;
• 2 an enlarged schematic representation of a section A in 1 is; and
• 3 a schematic structural representation of a control section is.

DETAILED DESCRIPTION

As in the 1 to 3 In the example shown, the example provides a naphthalenesulfonic acid production system comprising a side-by-side reaction vessel 1 , a degasser 2 (A conventional degasser that removes volatile components, namely naphthalene and water, by adding the vapor), a collector 3 for collecting a mixture of naphthalene and water (conventionally the water is used to purge the collected degassed gaseous mixture of naphthalene and water), a separator 4 for the separation of naphthalene and water, and one with a discharge opening of the degasser 2 connected Vorbehälter 5 , a finished goods container 6 , a naphthalene container 7 , a sulfuric acid container 8th one with the top of the collector 3 connected vacuum pump 9 and a clear water storage tank a includes.

The reaction vessel 1 includes a boiler body 11 , one at the bottom of the boiler body 11 provided thermometer 12 for detecting the internal temperature, one at the top of the boiler body 11 provided pressure gauge 13 for detecting the internal pressure, and one with one at the top of the boiler body 11 arranged emptying opening 15 connected drain pipe 14 and one at the bottom of the boiler body 11 provided cooling device 17 (Thus, the excessive release of heat when mixing sulfuric acid with water can be prevented from causing a high reaction temperature and thereby adversely affecting the yield of the target product (including but not limited to the use of the cooling water loop for heat exchange)) for cooling the inner material, the boiler body 11 Furthermore, an opening and closing cover is provided, which is used to open and close the discharge opening 15 serves and is inside the drainpipe 14 is, wherein the opening and closing cover an upwardly convex, arcuate cover plate 16 is, with one side of the arcuate cover plate 16 rotatable with the boiler body 11 connected and the other side on the boiler body 11 is provided,
the pre-tank 5 each with the lower part of the reaction vessel 1 and the finished goods container 6 connected, the naphthalene container 7 and the sulfuric acid container 8th each with the upper part of the boiler body 11 connected, wherein a naphthalene outlet opening of the separator 4 with the naphthalene container 7 connected, the clear water collection container a each with a water outlet of the separator 4 and the top of the collection device 3 connected is.

The system further includes a first line b , a second line c , a third line d and a tax system k , wherein the naphthalene container 7 through the first line b with the boiler body 11 connected, the sulfuric acid container 8th through the second line c with the boiler body 11 is connected, the hopper 5 through the third line d with the boiler body 11 is connected, wherein the first line b next to each other with a first pump of variable frequency e and a first flow meter f is provided, the second line c next to each other with a second pump of variable frequency G and a second flow meter H is provided and the third line d next to each other with a third pump of variable frequency i and a third flow meter j is provided.

The tax system k is in each case with the first pump of variable frequency e , the first flow meter f , the second pump of variable frequency G , the second flow meter H , the third pump of variable frequency i , the third flow meter j , the thermometer 12 and the pressure gauge 13 communicatively connected. With this adjustment, precise control of the feed, real-time monitoring of the reaction temperature and reaction pressure can be achieved, which is advantageous for the conversion of naphthalenesulfonic acid.

In this example, the diameter of the arcuate top plate 16 greater than half the inside diameter of the drain pipe 14 , In this way, the arcuate cover plate 16 , after which it is blown off by gas, under the action of gravity, the discharge opening 15 automatically cover, thereby ensuring that the internal temperature and the internal pressure are within a reasonable range.
In this example, the outlet of the drain pipe 14 used in a clear water tank to prevent the sour air in the deflated air from entering the atmosphere directly, thus polluting the environment.

The above embodiment is merely illustrative of the technical concept and features of the present invention, and the purpose is to enable those skilled in the relevant art to understand the contents of the present utility model and to implement it accordingly, but without the scope of the present utility model. Equivalent variations or modifications made in accordance with the spirit of the present invention are intended to be included within the scope of this utility model.

LIST OF REFERENCE NUMBERS

1

reaction vessel

2

degasser

3

collection device

4

separating device

5

hopper

6

Fertiggutbehälter

7

Naphthalene-container

8th

Sulfuric acid tank

9

vacuum pump

12

thermometer

13

manometer

14

drain pipe

15

emptying opening

16

curved cover plate

17

cooler

a

Clear water collection tank

b

first line

c

second line

d

third line

e

first pump of variable frequency

f

first flow meter

G

second pump of variable frequency

H

second flow meter

i

third pump of variable frequency

j

third flow meter

k

Control system.

Claims (3)

A naphthalenesulfonic acid production system, characterized in that the production system comprises a side-by-side reaction vessel, a degasser, a naphthalene-water mixture collecting device, a naphthalene-water separation device, and a preliminary tank connected to a discharge port of the degasser Fertiggutbehälter, wherein the pre-tank is connected in each case with the reaction vessel and the finished goods container; wherein the reaction vessel comprises a vessel body, a thermometer provided at the bottom of the vessel body for detecting the internal temperature, a pressure gauge provided at the top of the vessel body for detecting the internal pressure, and a drain pipe connected to a drain port disposed at the top of the vessel body and a cooling device provided at the bottom of the vessel body for cooling the inner material, wherein on the boiler body also an opening and closing cover is provided which serves to open and close the discharge opening and is located within the discharge tube, wherein the opening and closing cover is an upwardly convex, arcuate cover plate, wherein a Side of the arcuate cover plate is rotatably connected to the boiler body and the other side is provided on the boiler body; further comprising a naphthalene container and a sulfuric acid container, wherein the naphthalene container and the sulfuric acid container are respectively connected to the top of the boiler body, wherein a naphthalene outlet opening of the separator is connected to the naphthalene container. Production system for naphthalenesulfonic according to Claim 1 , characterized in that the system further comprises a vacuum pump connected to the top of the collecting device and a clear water collecting tank connected respectively to a water outlet of the separating device and the top of the collecting device. Production system for naphthalenesulfonic according to Claim 1 , characterized in that the diameter of the arcuate cover plate is greater than half the inner diameter of the discharge tube.

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