DE2534619A1 - METHOD AND DEVICE FOR MECHANICAL PREPARATION OF FLEETS - Google Patents

Description

HOECHST Aktiengesellschaft

File number: HOE 75 /? 198 + H

Date: July 30, 1975 Dr.OZ / v;

Method and device for mechanical preparation

of dye liquors

Purely the various dyeing processes for textile articles with water-insoluble ones Disperse dyes. It is necessary to use this Before they are applied to the goods, dyes are first divided into a fine division suitable for dyeing in the relevant item to transfer liquid staining medium. Usually this is done that powdered dye preparations in water of 40 - 60 C sprinkled in and dispersed by stirring. For this task is advantageously used a high speed stirrer, which shortens the process significantly. The handling and In particular, the dispersion of larger amounts of dye, e.g. for blackening, is often a problem in this way associated with strong dust, which cannot be avoided even by using low-dust powder brands, "an has therefore closed mixing vessels developed, into which the dye is introduced via a funnel and with a mechanical stirrer is dispersed. Apart from the development of dust, there are other obstacles in coping with the large ones Preparation volumes when transporting or pouring into the preparation container or dyeing devices.

Mixtures prepared in this way are added to the final dye bath or the padding liquor through a fine sieve. In order to should any dye particles that have remained undispersed be held back.

ORfQiNAt INSPECTED

609885/0 6 56

It has now been found that you can powder and paste-like Mix preparations of dyestuffs properly and directly in the final dyebath or the padding liquor if they are introduced into the dye bath through a nozzle.

The present invention thus relates to a method for the mechanical preparation of aqueous and / or solvent-based Dyeing or padding liquors with water-insoluble and / or water-soluble dyes, characterized in that one in the bypass to the dyeing tank sucks in a relatively small part of the possibly v / poor, blind liquor, under Overpressure mixed with the dye, which is available in powder or paste form, and in this state via a nozzle system reintroduced directly into the final dyebath, the dye dispersing there under the given conditions and / or is resolved.

The present invention also relates to an apparatus for carrying out the method for mechanical Preparation of aqueous and / or solvent-containing dye or padding liquors with water-insoluble and / or water-soluble Dyes, consisting of the following construction elements arranged one behind the other in the order they are listed: from a pressure-resistant suction hose or pipe (1) for suction an amount of liquor from the filled batch or dyeing vessel, the suction / pressure pump (2), which has a delivery rate of has about 50 liters / min and a pressure on the pressure side of about 1.5-2 bar to be generated. That under the pressure of the sucked in and pressurized by the pump (2) Amount of liquor opens automatically when the pump (2) is switched on. The valve (3) closes the pump and the suction line from the chamber (4-) intended to receive the dye. The chamber (4) is accessible from the outside via a pressure-tight closure (5). Via this one also empties the up to then in the Chamber located fleet. The chamber (4) is then charged with the dye to be dispersed and / or dissolved, and then closed again. Between the valve (3) and the chamber are at the end of the line

609885/0656

still special baffles (6) arranged, which a strong turbulence (rotary movement) of the amount of liquor pressed into the chamber and thus bring about an intensive mixing of the same with the introduced dye. The chamber itself has a Capacity from 30 - 50 liters, but can also be larger be. Another valve (7) closes the chamber from the nozzle. This valve only opens in the direction of the chamber nozzle, as soon as the pump (2) has generated sufficient liquor pressure in the chamber · It can be a simple one. check valve Act. The nozzle (8) for distributing the sucked in and mixed in the device with dye amount of liquor in the The entire liquor itself can have various types of construction, e.g. it can be a full cone nozzle or a fan nozzle be trained. It must allow a liquor throughput of about 50 l / min for the pressure generated by the pump. The nozzle itself is located at the end of a "suitably bent pipe (9). It allows the nozzle to be immersed in the liquor. Between the Valve (7) and the nozzle (8) can be fitted with a fine-meshed sieve to catch larger particles of dye.

* (not drawn)

For the purpose of distributing the dye in liquid form This is wenduigsmedien through the opening (5) of the lock introduced into the chamber (4) in powder or paste form and the chamber closed again. The suction hose and the nozzle are brought into the prepared 40-60 0 warm liquor and the pump (2) switched on. This becomes part of the fleet sucked in, loaded with dye in the chamber and pumped back into the liquor through the nozzle. The nozzle causes the dispersion of the dye. After 1-2 minutes, the pump is switched off and the chamber (4) is opened by opening the non-return valve (7) emptied.

An exemplary embodiment for a device according to the invention is shown schematically in the drawing given below. The reference numbers used in this figure have the following meanings:

- 4 609885/0656

1 = suction hose also

2 = suction pressure pump

3 = quick opening valve

4 = chamber for receiving the dye

5 = closure of the chamber

6 = baffles

7 = valve (check valve)

8 = nozzle

9 = extension (immersion) tube

The "claimed method together with the device described is primarily a matter of dispersing water-insoluble Dyes determined in aqueous liquors. It is of course also suitable for preparing dye and padding liquors water soluble dyes. It is an advantage that the entire amount of liquor is available to dissolve the dye and not, as was customary up to now, the dye first pre-dissolved in a limited amount of water and this solution only must be added to the total volume of the liquor. Since these batch solutions often have a considerable volume, the transport problem falls for this also gone.

The following examples are not intended to restrict the process in any way, but only to explain the main application;

- 5 609885/0656

example 1

3 kg of the water-insoluble, powdery disperse dye the formula

CN

0.N- f ^ -N = N- (f \\ - ff '

are to be dispersed in 300 liters of water of 4-O ⁰ C to a padding liquor containing 10 g / l dye content.

Man "brings to the commercial dye powder into the chamber (4) of the dispersing device according to the invention a. Suction hose (1) and nozzle (8) v deep into the fleet of 300 1 4O ⁰ C / poor V / ater immersed and the pump (2 ) of the device is switched on for 1-2 minutes.The contents of the chamber of the device are then also transferred into the liquor by the pump pressure.

A directly usable dye dispersion is obtained, without the annoying dusting when preparing the same and in a single operation.

Example 2

5 kg of the commercially available, relatively poorly soluble, powdery 1: 2 cobalt complex of the dye with the formula

SO ₂ - NH - CH,

HO

should be dissolved in 1000 l of water at 90 ^° C.

609885/0656

-O-

This is done using the device of the registration as in Example 1 and receives a directly usable dye bath.

According to previous regulations, this amount of dye had to be made into a paste with 5-10 liters of cold water and then poured over it Pre-dissolved approx. 70 liters of boiling water. The solution obtained in this way was then added to the dye bath through a sieve.

- 7 609885/0656

Claims (1)

PATENT CLAIMS 1, method for mechanical preparation of aqueous and / or Solvent-based dye or padding liquors with water-insoluble ones uiiu / öder water-soluble dyes, characterized in that that a relatively small part of the possibly poor, blind ones are blinded in the bypass connection to the dyeing container Sucks in liquor, mixed with the dye in powder or paste form under excess pressure and in this state via a system of nozzles directly into the final dyebath, the dye there under the given conditions is dispersed and / or dissolved. Device for carrying out the method according to claim 1 for the mechanical preparation of aqueous and / or solvent-based Dye or padding liquors with water-insoluble and / or water-soluble dyes, consisting of the following, Construction elements arranged one behind the other in the order they are listed: a suction hose or pipe for sucking in a quantity of liquor from the filled preparation or dyeing vessel, a suction pressure pump, a volume of liquor that is sucked in and pressurized by the pump rapidly dissolves • opening valve, one intended to take up the dye and of externally accessible, pressure-tight lockable chamber with special baffles to swirl the in the closed chamber pressed the amount of liquor, another, only in the direction out of the chamber and valve opening under pressure and one on one suitable for introduction into the liquor Hose or pipe-mounted nozzle for distributing the sucked in and using it in the device Dye restricted amount of liquor in the total liquor. * lim supply pipe)
G09885 / 0656 Blank