SU1643602A1 - Method for obtaining synthetic detergents - Google Patents

Abstract

The invention relates to the production of detergents, in particular the production of synthetic detergent in granular form. The goal is to improve the quality of the product in terms of reducing thermal decomposition, components. The components are mixed for this — non-ionogen. The invention relates to methods for producing granulated products and can be used to obtain granulated synthetic detergents (HSMS) and other household chemicals. The aim of the invention is to improve the quality of the finished product in terms of reducing the thermal decomposition of components, increasing the content of the target fraction granules with one. a recent reduction in energy consumption, a surfactant and non-thermostable additives, followed by separation of the resulting composition into two streams and their spray drying. To ensure obtaining a product with a higher content of the target fraction of the granules and to reduce energy consumption, 80-98% by weight of the composition is spray-dried and the dried part is mixed with non-thermostable additives while spraying the rest of the composition. It is better to preliminarily introduce a non-ionic surfactant to increase the bulk density of the final product in the sprayed portion of the composition. These conditions reduce fuel consumption by 5–30% and provide the particle size distribution of the highest quality category (fraction from 0.2–2.5 m to more than 90%) with a high bulk density of 440 kg / m3 against 410 kg / m3 in the known case. 1 hp ff, 1 ill., 1 tab. as well as an increase in bulk density of the product krnechnogo. The drawing shows a flow chart for a method for producing granulated CMC. Powdered thermostable components of the raw material from the bins 1 with dispensers 2 and conveyor 3 are fed into the reactor-mixer 4. Liquid thermostable components are supplied from the containers 5 with dispensers 6 to the same reactor. The reactor 4 is mixed with § & Ј CO About 1C

Description

components. The resulting composition is fed to a high pressure pump 7 and then divided into two parts. The first part in the amount of 80-98% of the total mass is fed to the spray dryer in the tower 8, where it is dried by the flow of coolant coming from the generator 9.

The spent coolant is cleaned in cyclones 10 and dumped into the atmosphere. The drying semi-product obtained by conveyor 11 is fed to mixer 12. Mixer or conveyor 11 from hopper 13 is fed with dispenser 14 and powdered non-thermostable CMC components (sodium perborate, sodium bicarbonate, enzymes and others), as well as dust trapped in dust cleaning systems that are sprayed the second part (2-20%) of the composition. The amount of the composition is chosen within the specified limits from the conditions for achieving a high degree of granulation of dust particles and at the same time obtaining a product with good flowability. The moisture contained in the second part of the composition is chemically bound with salts of non-thermostable additives and dust.

Nonionic surfactants are introduced into the second part of the composition in the mixer 15, supplied from the reactor 16 with a metering device 17. This achieves a significant reduction in the viscosity of the composition, ensuring its monodisperse decomposition and, very importantly, increasing the degree (density) of binding of dust-like particles - due to the increased wetting ability of the liquid. As a result, a product of higher bulk density is obtained.

The finished product from the mixer 12 is fed to the packaging 18.

Get the composition of the following composition, wt.%:

TPF20

Soda Ash 10

Sodium sulfate 4.2

CMC 1,35

Optical Bleach 0.1

Sodium perborate 10

Nonionic PAV3

Sulfanol (100% surfactant) 10 Liquid glass (at 100%

SiOЈ) v1.35

Water40 Example 1, (according to known method-1 shoe) Composition is prepared and served

its two streams at different levels of the spray dryer (tower). The temperature of the heat carrier at the entrance to the tower is set at 220 ° C.

The results of measurements and analysis of the obtained product are shown in the table.

Example 2. A composition (mixture) of CMC of the specified composition is prepared, 0 but without sodium perborate and non-ionic surfactant. The water content is kept at 40%. Sodium perborate is introduced into the mixer 12 and H-surfactant is sprayed separately from the composition. five . The resulting composition is divided into two parts: 98 and 2%, respectively, and 98% of the composition are spray-dried, and the remaining 2% is sprayed into the mixer, where the drying product of the first part of the composition, sodium perborate (10%), trapped dust and non-ionic Surfactant (3%).

Example 3. The method of example 2 is carried out, with the only difference being 5 that the composition is divided into two parts equal to 80 and 20%, respectively.

Example 4. The method is carried out according to Example 2, with the difference that the composition is divided into two parts equal to 90 and 10%.

Example 5. The method is carried out according to Example 2, with the difference that the composition is divided into two parts equal to 75 and 25%, respectively.

Example 6. The method is carried out according to Example 2, with the difference that the composition is divided into two parts equal to 99.5 and 0.5%, respectively.

Example 7. The method is carried out according to example 3, but the composition of the composition is changed,%: sodium tripolyphosphate 30; sodium sulfate 30; sulfanol 15; liquid glass 1.5; functional supplements 2; water 8 ..

Example 8. The method is carried out as in Example 4, but non-ionic surfactants (syntanol-DS-10) are introduced into the second part of the composition and sprayed together in a mixer.

Example 9. The method is carried out according to Example 4, but non-ionic surfactant-syntamide 5 is introduced into the second part of the composition and sprayed together in the mixer.

The results of the tests

5 are presented in the table.

Ii

As follows from the above data,

proposed method (feeding part of the composition to the granulation, min

five

0

five

0

sixteen

dust drying) allows to reduce fuel consumption by 5-30% while ensuring the particle size distribution at: the requirements of the highest quality category (fraction 0.2-2.5 mm 90%).

Improvement of the particle size distribution is achieved due to the additional granulation of the spray-drying product, as well as dust particles of non-thermostable additives, by spraying the second part of the composition with non-ionic LAV in the mixer.

The introduction of H-surfactant into the second part of the composition allows an additional increase in the bulk density of the product from 410 to 440 kg / m3.

There is no thermal decomposition of H-surfactant and sodium perborate, as they are introduced into CMC at ambient temperature.

Going beyond these limits either does not provide a product of a given particle size distribution and energy saving, or results in a sticky product due to the saturation of the second part of the composition with moisture.

1643602

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Claims (2)

Claim 1. A method of producing a synthetic detergent by mixing components including a non-ionic surfactant and non-thermostable additives, dividing the resulting composition into two streams, followed by spray drying, characterized in that in order to improve the quality of the product decomposition of components, ensuring the preparation of a product with an increased content of the target fraction of the granules while reducing energy consumption, spray drying 80- 98% by weight of the composition and the dried part is mixed with netermostabilnymi 0 additives while spraying the rest of the composition. . . , 2. The method according to claim 1, which is based on the fact that, in order to increase the bulk density of the final product, a non-ionic surfactant is previously introduced into the sprayed part of the composition . Indicators Indicators for example 1 by a known method The total consumption of the combination,%: 1h compositions j 2h Composition Natural gas consumption for the production of 1 ton of CMC, m3 / t Content of the target fraction of particles 0.2-2.5 mm,% I  Bulk density ; product, kg / m3 Thermal decomposition of perborate and H-surfactant,% Flowability of the product 3 98 80 2 20 90 75 99.5 90 90 80 10 25 0.5 10 10 10 .115 92 102 88 123 103 103 103 91 96 95 82 85 94 95 95 (lumps) 405 420 410 400 400 420 440 440 Does not decompose 70 71 73 0 72 72 75 75 Compiled by L. Rusanova Editor N. Rogulich Tekhred L. Oliynyk Proofreader T. Malets Order 1220 Circulation 287 " VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Subscription