CS234278B1 - Handle for detergent half-finished products making with optimum transport properties - Google Patents

Abstract

The invention relates to the production of powdered powders detergent feedstocks by spray drying towers and solves capacity performance and energy intensity of production powder detergents. The essence of the stick with optimum transport properties is that these are limited weight ratio of sodium sulphate and sodium triphosphate in the range of 1.1 to 6 to 1, preferably 2 to 1. Main advantages of the invention consist in optimizing capacity and energy production requirements detergents.

Description

The invention relates to a batch composition for the production of detergent intermediates by drying and optimum transport properties.

At present, most of the powder detergent product is prepared by the so-called combined technology. Its principle is the production of the semi-product in spray drying ovens and its mixing with other semi-products or individual raw materials. The basic and most energy-intensive part of production is the preparation of the dried semi-product, consisting of the preparation of the batch, its filtration, homogenization by centrifugal pumps and transport by high-pressure positive displacement pumps to the nozzles. The yield, energy performance of the product and the quality of the product depend on the transport properties of the batch, determined by their consistency coefficient and flow index due to their non-Newtonian behavior.

The feedstocks of the semi-products contain, inter alia, high levels of surfactants, polyphosphates, in particular sodium triphosphate and sodium sulphate. In particular, triphosphate, due to its high hydration capacity, limits the transport properties of the shaft, which results in an increase in pressure drop resulting in lower pump capacity. Limited transport options reduce the drying capacity and thermodynamic efficiency of the dryer.

Previously used powder detergent manufacturing processes based on the production of all or most of the detergent spray dryers, even with the same composition, did not allow the preparation of a batch with optimal transport properties. These were determined by the composition of the detergents, ie determined by the efficiency of the product. Special raw materials, such as hydrotropic substances, were added to the batches to partially improve the transport properties, but they increased the raw material costs.

The introduction of combined technologies for the production of powdered detergents, ie the production of a semi-product by drying and its mixing with other semi-products or individual detergent ingredients and the new determination of the dependence of the batch consistency coefficient on sodium sulphate / sodium triphosphate 2 -

234 278 semi-product so that the batch exhibits optimal transport properties.

SUMMARY OF THE INVENTION The invention relates to batches for the production of detergent intermediates having optimum transport properties prepared at a temperature of 50 to 85 ° C, containing 53 to 65% by weight. dry matter with a dry matter composition of 15 to 2? % wt. % surfactants, 50 to 80 wt. mixtures of sodium sulphate and sodium triphosphate or other components such as sodium silicates or sodium carbonates or optically brighteners, or carboxymethylcellulose or mixtures of these are such that the optimal transport properties are achieved by weight ratios of sodium sulphate and sodium triphosphate in the range of 1.1 to 1.1 6 to 1, preferably in a ratio of 2 to 1.

The main advantages of a feedstock with optimum transport properties achieved by a limited ratio of basic raw materials are that due to the suitable Theological behavior of the feedstock (low consistency coefficient) it allows to increase the feedstock dryness without loss of piping transport capacity and thereby optimizes capacity and energy demands for detergent production.

Exemplary embodiment

A spray batch containing 60 wt. dry matter, of which dry matter is 15.0% by weight /. sodium dodecylbenzenesulfonate, 8.0% wt. % water glass, 3.0 wt. % carboxymethylcellulose, 0.5 wt. % brightening agents, 20.0% w / w. sodium triphosphate and 53.5 wt. sodium sulfate.

The handle thus designed has a consistency coefficient at 55 ° C

21.9 kg, m. Sec, which allows production of 3 500 kg.lT ^{1 of the} semi-product at the inlet drying temperature of 380 ° C and the outlet temperature of 100 ° C at the drying plant flow rate of 30 000 kg.iT ¹ on the production unit tested.

On the other hand, the same batch, but with the opposite weight ratio of sodium sulfate and sodium triphosphate, has the same consistency coefficient (23.9 kg.m.sec) at only 57% w / w under the same batch preparation conditions, allowing production on the same production unit. only 3 000 kg.h of the semi-product under identical drying conditions.

Keeping the same dry matter content, ie 60% w / w, the coefficient of * · 1 H — 9 of the batch consistency increases to 3'1 kg.m.sec, which is accompanied by a decrease in capacity to 2400 kg.h ^{1 of the} semi-product.

Claims (1)

A batch for the preparation of detergent semi-products with optimum transport properties, prepared at a temperature of 50 to 85 ° C, containing 53 to 65% by weight of dry matter, with a dry matter composition of 15 to 27% by weight. of surfactants, 50 to 80% by weight. mixtures of sodium sulphate and sodium triphosphate, or other constituents such as sodium silicates or sodium carbonates or optical brighteners, or carboxymethylcellulose, or mixtures thereof, characterized in that the optimum transport properties are achieved by the weight ratio of sodium sulphate and sodium phosphate in the range 1.1 to 6 to 1, preferably at a ratio of 2 to 1;