SU939529A1 - Process for clarifying primary raffinates of mineral wax - Google Patents

Description

(5U

METHOD OF LIGHTING PRIMARY REFINATES OF THE MOUNTAIN WAX OR PRODUCTS OF THEIR ETBRYTHAWAY

The invention relates to the clarification of wax products, namely, primary raffinates of mountain wax or their esterification products, which are widely used in consumer, pharmaceutical, and other industrial areas.

A method is known for producing primary raffinates of mountain wax or their esterification products by treating the wax melt with aqueous solutions of alkali metal chlorates in an acidic medium. Bleaching wax is based on chlorine dioxide j release.

However, in the case of using sodium chlorate in the presence of Chavey acid, no wax clarification is observed.

The purpose of the invention is to improve the quality of the target product.

The goal is achieved by treating the raffinates of mountain wax or their sterilization products.

aqueous solution of alkali metal chlorates in a neutral medium with od. modern distillation of water.

Preferably, aqueous solutions containing chlorates in an amount of 0.1-1.% By weight are used.

 Primary raffinates or their esterification products are treated with aqueous solutions of chlorates, preferably chlorates "atri. Only small amounts of chlorates are required for processing - typically 0.31 wt. clarified wax. Bleaching

15 can be made only with aqueous solutions, since the solid salt mixed with liquefied mountain wax can lead to self-ignition. It is advisable to use

20 solutions containing 100-500 g of sodium chlorite per liter, since such solutions do not crystallize even at low temperatures. The brightening effect of chlorates in this case.

based on the release of oxygen, which, as a result of the oxidation, brightens the hue of the raffinate wax. When sodium chlorate is clarified, sodium chloride is formed, which is then removed from the liquid raffinate by settling.

The partially waxed raw mountain wax used in the examples has the following analytical data:

Acid number,

mg KOH / G 31 (TG1

8 118/06) The number of saponification, mgKOH / D 92 (according to TG1

8Я8 / 07) Point of solidification, from 79 (according to TG1

0-51556) Content of resins,% 3.0 (according to TG1

 5881)

Example 1. 100 kg primary. Brown raffinate obtained by treating dichromates with sulphate solutions in a molten state at 90-1OO C is mixed (with stirring) with 20 liters of an aqueous solution of sodium chlorate (250 g sodium chlorate per liter) and heated to 120 ° C while the agitator is working. At the same time, the water vapor of the raffinate escapes and is clarified to yellowish white. Then the mixer is switched off, after a half-hour settling, a slight precipitate is removed and the wax is additionally processed in the usual way by debarking it, on a cooling roll or by grinding.

Analytical data of wax raffinate before and after clarification with sodium chlorate:

Before After Acid number,

. mg KOH / G 9 9 Number of saponification, mg

KOH / H Point of solidification, with 81 81 Penetracy,

Yu-mm 13 IT (according to

TG1 1262)

Color 13 8 (by

TG1 2111)

Example 2. 1000 kg of raffinate wax obtained by treating nitric and sulfuric acids followed by esterification with 2,3-butylene glycol and changing its hue during this esterification from yellow to brown, are mixed with and with the stirrer working with 10 l of sodium chlorate aqueous solution

(500 g of chlorate per liter, then slowly heated up and thereby dehydrated. As a result, the raffinate acquires its initial yellow tint. Further processing is carried out analogously to example 1.

Analytical data of wax afinat before and after sodium lorate clarification: Before After

Acid number lo mg

KOH / G The number of saplings,

mg KOH / G 1i2 Point of solidification,

H

75 10

75 13

Colour

Peietracy,

20 20

1 o mm

Example Comparative Refined Mountain Wax c. characteristics: Acid number, mg KOH / G82

Saponification number, mg KOH / G 13 Boiling point, C 80 Penetration, 10 mm 15 Color (according to Technical Standards and standard qualities of supplied goods 21161) 16 (Brown)

treated with the proposed method with an aqueous solution of sodium chlorate (2 vol.%) of 250 g of sodium chlorate per liter, i.e. 0.5 weight,% MaxSL and thus the color is clarified (without changing other characteristics) from the initial value of 16 (brown) to 10 (yellowish-white).

Claims (2)

The same wax in accordance with l is mixed with 0.5 weight. NaC103 and 0.5 wt. oxalic acid, as well as 0.5 ml of water and stirred at 85 ° C, i.e. above the melting point of the wax. No clarification is observed Chlorine dioxide can be extracted from chlorates with oxalic acid only in the presence of sulfuric acid according to the following formula: 2NaC103 CCOOH) jL + 2H ,, SO, 2С102 +, t COg + ZH p -ZNaHSO. However, it is completely unexpected that, according to the proposed method, sodium chlorate in an aqueous growth thief completely releases its oxygen and, as a result, additionally brightens the previously refined mountain waxes. Example 3. Refined mountain wax with characteristics (the values in brackets are parameters of another production load ): Acid number, mg KOH / g Saponification number, mg KOH / G Boiling point, Penetra | and, (16) (darker than 16) is treated for the first time with an aqueous solution of sodium chlorate (1% by volume) of 250 g of sodium chlorate per liter, in the second case with the same solution (A% by volume) and in both cases illuminated until color 10 (yellowish-white. The same is achieved by treating the esterification product obtained from here with the characteristics: 296 Acid number, mg KOH / G Saponification number, mg KOH / g Boiling point, C Pedetration, 10 mm lighten using the above (2-3 vol.%) solution brighten to color 10. The remaining characteristics remain without (changes as in the above example. Conducting the clarification of wax products with aqueous solutions of chlorates with simultaneous otgbnkoy water allows for clarification without changing the structure of wax. alkali metals, distinguished by the fact that, in order to improve the quality of wax, the treatment is carried out in a neutral medium with simultaneous distillation of water. 2. A method according to claim 1, characterized in that an aqueous solution of chlorate utilizes 0.1-1% by weight concentration. Sources of information taken into account in the examination 1. US patent W 23318 2, cl. , (prototype ;.