SU254702A1 - METHOD FOR DETERMINING THE CONTENT OF FATTY ACIDS IN SOAP BASIS - Google Patents

Description

The invention relates to the field of soap production.

At present, the total fatty acid content (saponification number) in a soap base is determined by laboratory methods using a rather complex chemical analysis, which takes a long time. This method of determining fatty acids cannot be used to automatically control the saponification process on continuous installations, as it does not provide control of the composition of the soap base directly during its preparation.

The proposed method provides control of the composition of the soap base directly during its preparation.

To do this, the concentration and consumption of the fat set, the concentration and consumption of carbonic soda and the consumption of caustic alkali supplied to prepare the soap base are continuously measured and the expected content of fatty acids in the latter is calculated from the ratio of the measured values.

FIG. 1 and 2 are schematic diagrams explaining the method.

The diagram shows the flow meter 1 and the concentrator 2 fat set, the flow meter 5 and the concentrate meter 4 carbon dioxide soda solution, the flow meter 5 and the concentrate meter 6 caustic alkali, the computing device 7, the secondary recording device 8, the reactors 9 and W.

The essence of the method is as follows.

The computing device 7 continuously receives signals about the value of the flow rate and concentration of the fat set, the flow rate and concentration of carbon dioxide, and the flow rate and concentration of caustic alkali.

In accordance with the values of these parameters, the computing device determines the total fatty acid content in the soap base by a special algorithm and outputs it to the secondary recording device 8. The algorithm, which determines the total fatty acid content in the soap base, is represented in a simplified form by the equation:

x (t-) + ffl, y (-) 1 G.Q. (-)

z (i) (t-.) +.% t--) O. (t--,) +)

where i is time; x (i) is the content of fatty acids

in the gas mixture;

y (t) is the content of neutral fats in the fat mixture;

Gjfy (t) - fat mixture consumption per unit; G (O - carbon dioxide soda solution;

Gj (t) is caustic alkali; p (i) concentration of carbonate soda solution;

t and ta are the stoichiometric coefficients;

t is the total average transport delay in the installation; Ta is the average transport lag in the caustic alkali reactor;

 - medium transport, carbonate saponification delay in the reactor.

An example (see fig. 2).

The value of the total fatty acid content in the fat mixture entering the U / carbonate saponification reactor through the feed line 12 is measured by sensor J3 (ATP-11 or KK-8) and transmitted through the secondary device 14 (EMD) to the computing device 15 (electronic or on the elements of the USE PPA). The device simultaneously receives signals from the sensor 16 for the consumption of the radiation mixture (RED) through the secondary device / 7 (EPID); from sensor 18, the concentration of carbon dioxide soda solution (KK-8) entering through the flow line 19 to the reactor // via the secondary device 20 (EMD); from the sensor 21 consumption of a solution of carbonate soda (RED) through the secondary device 22 (EPID); from the sensor 23 consumption of a solution of caustic alkali (RED), coming through the flow line 24 to the reactor 25 of the addition of caustic alkali, through the secondary device 26 (EPID).

The computing device consists of setpoint adjusters 27 and 28 of constant values, multiplier 29, repeater 30, adders 31, 32 and 33, multiplying-dividing devices 34, 35 c 36 and elements of the jumper 37, 38 and 39. A secondary device is connected to the output of the computing device 40 (EPID or

SLR-29B), which indicates the value of the total fatty acid content in the soap base, leaving the feed line 41 after the caustic alkali reactor.

Present Invention

The method for determining the content of fatty acids / kari in a soap base, characterized in that, in order to bleach the control of the composition of the soap pox directly during its preparation, the concentration and flow rate of the fat set, the concentration and flow of carbon dioxide and caustic alkali used for preparing the soap base, and the expected content of fatty acids in the latter is calculated by the ratio of the measured values.