SU1608219A1 - Method of producing white oil - Google Patents

Abstract

The invention relates to refining, in particular the production of white oil used as a compressor solvent in the polymerization process in the plastics industry. The goal is to reduce waste sour tar and increase the yield of the target oil. The process is carried out by extractive purification of oil distillates using a selective solvent (furfural), followed by raffinate dewaxing by first treating 6-8 wt.%: ALCL ₃ at 90-100 ° С, and then oleum with acid tar separation and contact purification with bleaching earth Gumbrinom). Under these conditions, the yield of acid tar decreases from 32 to 20.72% and the yield of white oil increases from 68 to 84.7%. 4 tab.

Description

The invention relates to refining, and specifically to the production of white oils, which are used as compressor solvents in the polymerization process in the plastics industry.

The aim of the invention is to reduce waste, in particular the acid tar produced during the oil refining process, and increase the oil yield.

Oil distillates are purified by selective solvent and the wax is dewaxed. The dewaxed raffinate is in contact with Whi pi C with aluminum chloride, taken in an amount of 6–8 May.%. Purify with oleum and finish purify with bleaching earth.

Example 1. An oil fraction with a viscosity of 15.0 mm2 / s at 50 ° C is treated with crystalline urea in a solution of furfural and alcohol at 25 ° C for 30 minutes; the wire is simultaneously selectively purified. The solution is separated from the oil, filtered, washed with furfurol at the ratio of raw materials: furfural 1: 1. The solution / dewaxed product is extra-, treated with the same solvent. 100 g of the resulting dewaxed raffinate oil fraction having 50 1.64 mmg / s, density 20 off refractive index

P . 1 Lyaa l

P

. - J J JMJJtiHIJA

 1.4868, with an aromatic hydrocarbon content of 17.4 wt.%, Is treated with aluminum chloride, taken in an amount of 8.0 masl per oil, with

3160

The duration is 5 hours. After sludge treatment with aluminum chloride, the oil is separated from acid tar, the amount of which is 14.4 wt.%, the oil yield is 85.6 wt.%. Oil after washing and neutralization has the following qualities: Vgjj 14.4, p. 1.4765, O 4 866.9 KG / -MZ, color 2 units, flash point 187 s, congealing -42 ° С, acid number 0, 03 mg KOH / g. The content of aromatic hydrocarbons is 7.1 wt.%.

To obtain a white oil, the neutral oil is subjected to step processing with oleum with the supply of 5 wt.% Oleum for each step, and then contact purification 50 May L of Humbrin. The result is a white oil with the following qualities: V5o ,, and, 4mm2 / s, p 1.4730.11 ° 867.7 kg / m colorless, flash point 188 ° C, solidification -42 ° C, acidic

I CJ (J O - CIV. A VA -. Y

the number of 0.008 mg KOH / g, the content of aromatic hydrocarbons is 0.8 wt.%, the yield of acid tar is 26.4 wt.%, the yield of white oil is 73.6 wt.%.

Example 2. 100 g of dewaxed raffinate prepared according to example 1, having a Vjo of 14.64, a density of p 869.2 kg / m, p 1.4868 with an aromatic hydrocarbon content of 17.4 wt.%, Are treated with aluminum chloride, taken in an amount of 6% by weight, at 110 ° C, 5 hours. After treatment with aluminum chloride, the oil was separated from acid tar, the amount of which was 12.7% by weight, the yield of neutral oil was 87.3% by weight.

Neutral oil after washing has the following indicators V50 14.4, p 1.4745, p 866.2 kg / m color 2-, flash point. , congealing -42 ° C, acid number 0.04 mg KOH / g, aromatic hydrocarbon content, 6.2% by weight. After treatment with oleum and contact trim, described in example 1, obtained white oil, they

following indicators of quality a:

  lg i. fctJ - V

. fc-lM, J1 h lf JO

. ". 13.58, 1.4726, p

-.t ..-- .. 1..г ,. «х / -1гг. ЖП ii ТЛ 3

KG) t -f -

863.9 kg / m3, colorless, flash point of 18b С, solidification -42 ° С, kiloton number of 0.005 mg KOH / g, aromatic content of hydrocarbons 0.8 wt.%, Yield of white oil 75.9 masl, yield of acid tar 24 , 1 wt.%.

Example 3. 100 g of dewaxed raffinate, obtained in Example 1 and having the qualities obtained in Example 1, were treated with aluminum chloride, taken in an amount of 7.0 wt.% At 110 ° C, for a duration of 5 hours. sour tar, in the amount of 14.6 wt.%. The yield of neutral oil is 85.4 wt.%. After washing, the neutral oil has a Vfo of 13.1 mm2 / s, 1.4831, 865.2 kg / m, color 1.5 units, flash point, solidification -42 ° C, acid number 0.02 mg KOH / g, the content of aromatic hydrocarbons is 5.8 wt.%. After treatment of the neutral oil with oleum and contact purification, as described in Example 1, a white oil was obtained with the following quality indicators: V5ol2.86,

-. “- TL ,.

. go

1.4722, 859.1 kg / m, bes

five

K - 1

color, flash point in L-, pour point -42 ° C, aromatic hydrocarbon content 0.5 wt.%, acid number 0.005 mg KOH / g, white oil yield 73.4 wt.%, acid tar tar yield 26.6 wt. %

Example 4. 100 g of the dewaxed raffinate prepared according to example 1, having a viscosity at 50 ° C of 34.96, with an aromatic hydrocarbon content of 13.8% by weight, n 1.4860, 887.0 kg / ms, - treatment is carried out, taken in the amount of 8 wt.%, at 100 ° С, the duration of 5 hours. After processing and sludge acid tar, the amount of which is 18.4 wt.%, a neutral oil is obtained, yield 81.6 wt.%. viscosity at 50 ° С 29.6, p. p 1 4796, p 4 ° 881 kg / m color 1 unit, aromatic content of hydrocarbons 7.4 wt.%, acid number 0.05 mg KOH / g. After processing the neutral oil with oleum and contact cleaning in example 1, get white

0

five

LJi-li ilXJri ii -. -.

an oil that has: V5o29.2, p 1.4738, 879.5 kg / m, colorless, acid number 0.002 mg KOI / G, aromatic content 1.5% by weight, white oil yield 69.7% by weight, the output of acid tar 30.3 wt.%.

Example 5 (for comparison). 100 g of dewaxed raffinate obtained according to example 1, having the qualities specified in example 1, under 5

treated with aluminum chloride, taken in the amount of 5.0% by weight, at 120 ° C, duration 5 hours. The result is a neutral oil, yield 83.2% by weight, viscosity MMVc at, p 1.4867, P4 869 , 0 kg / мз, color 2 units, the content of aromatic hydrocarbons is 9.9 wt.%, The acid number is 0.02 mg KOH / G, the flash point is 18b С, h. styvani After treatment with olum and contact purification according to example 1, an oil was obtained with a Vro13.9 p 1.4760, 868.1 kg / m, the aromatic content of aromatics is 2.3% by weight, the acid number is 0.005 m KOH / g Out ;; oil 71.2 wt.%, the amount of acid tar 28.8 wt.%. The oil does not satisfy the requirements for the content of aromatic hydrocarbons.

Example 6 (for comparison). 100 g of the dewaxed raffinate prepared according to example 1 is treated with aluminum chloride under the following conditions: temperature 80 s, amount A1C1, 9.0% by weight, duration 6 hours. A neutral oil is obtained with V5.o13.9 MMVc, p 1.4750, 866 kg / mz, color 2 units, acid number 0.03 mg CFU / g. the content of aromatic hydrocarbons is 9.7 wt.%, the yield of oil is 81.6 wt.%, the yield of tar is 18.4 wt.%. After treatment of the oil with oleum and contact cleaning in Example 1, the white oil has the following quality indicators “L f S .5 °. R

a 1 / h -., .---,,. oo /, 1 kg / m3, acid number 0.008 mg KOH / G, colorless, aromatic hydrocarbon content 1.8% by weight. The yield of white oil to 68.4 wt.%. The amount of acid tar 31.6 wt.%. White oil does not satisfy the requirements for the content of aromatic hydrocarbons.

In tab. 1 shows the data on the quality of neutral and white oils obtained in examples 1-6, in table 2082196

material balance of the process of these examples.

Example 7 (for comparison). The method is carried out similarly to that described in Example 1, but the treatment with aluminum chloride of a dewaxed raffinate is carried out under the following conditions: temperature, quantity 10 AlClj 5 wt.%. A neutral oil was obtained, the yield was 90.4 wt.%, The tar yield was 9.6 wt.%. Neutral oil has the following quality indicators: 14.5 MMVc, ng 1.4755, p

15 0.865 g / cm, temperature of the plug

186 C, pour point, acid number 0.02 mg CFU / g, color 2 units, content of aromatic hydrocarbons, 9.0 wt.%. Neutral

20 oil is further purified as in example 1.

Example 8 (for comparison). The method is carried out as in example 1, but. the resulting dewaxed refinery 25 is purified by oleum taken

in the amount of 9.0 wt.%. Get - a neutral oil, yield 80 wt.%, And tar, yield 20 May.%. Neutral oil is cleaned with oleum and after-treatment - from bleaching earth.

In tab. 3 shows the indicators of the quality of the obtained white oil, in table. 4 - material balance of the process,

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Claims (1)

Invention Formula The method of obtaining white oil by purifying the oil distillates by extraction with a selective solvent, de-waxing the obtained raffinate, purifying with oleum, and contact purification with bleaching earth, o tl and h a-. So that, in order to reduce waste and increase the yield of the target product, the dewaxed raffinate is additionally treated at 90-110 C with aluminum chloride, taken in an amount of 5Q ve 6-8 wt.%, before oleum cleaning. . Indicators Viscosity at 50 ° С „ao , g / cm Temperature, C; flashes Frozen Acid number, mg LON / g Color Aromatic hydrocarbon content, wt.X 9.0 2.0 7.0 1.0 Thallc D