SU1337396A1 - Method of treating petroleum oil fractions - Google Patents

Abstract

The invention relates to methods for the selective purification of oil fractions of petroleum and can be used in the refining industry. The purpose of the invention is to improve the quality of the purified fractions. The goal is achieved by using another selective solvent based on furfural, which additionally contains 3-methyl-1,3-butanediol in an amount of 3-20 wt.% Calculated on the solvent. The use of this solvent reduces the viscosity ratio of refineries at 50 and 100 ° C by 4.2-6.5%, and the viscosity index of the oil increases by 9-16 points., 1 tab. 00 00 -vj 00

Description

The invention relates to methods for the selective purification of oil fractions of petroleum and can be used in the oil refining industry.

The purpose of the invention is to improve the quality of the purified fractions. A selective solvent is a mixture of furfural with 3-methyl-1,3-butane diol, taken in an amount of 3-20%

Z-methyl-1,3 butanediol (, MBD) is a colorless liquid, density at 987 kg / m, refractive index. According to j, boiling point at atmospheric pressure 202 Co, at normal boiling point

Example 1 “Extraction with selective solvent containing furfural and MOI, with its multiplicity to the raw material equal to 1.5: 1 wt.h., subjectivity of the solvent to the Raw, max,%

The composition of the solvent, IAS,%:

furfural

3-methyl-, 3-butanediol

tetrahydrofurfuryl alcohol

The output of the raffinate, mas%

Refractive index

raffinate, gh

150150 50 150

978780 98

1320 2

150

75

25

85.6 86.8 87.5 50

90

10 85.5

1.4879 1.4862 1.4871 1.4801.48771.4884

Indicator

j; 50

for raffinate

4.59

Viscosity index of dewaxed raffinate, VI

91

0

five

distillate oil fraction boiling in the range of 380-500 ° С and having a density of –169 kg / m at a density of 9 1.4980, viscosity at –45.05 cSt, at 100 C of 8.21 cSt, containing sulfur in the amount of 1.69 mas%.

Single-stage extraction is carried out in thermostatically controlled funnels at 60 ° C. After stirring the mixture for 20 minutes, it is settled to full transparency. After equilibration is established, the phases are separated. Extract and raffinate are obtained by distilling the solvent from the corresponding phases.

The table presents the results of the extraction according to the described method (examples 1-3), the prototype (example 6) and the method when the solvent composition goes beyond the limits described (example 4.5) about Extraction in examples 2-6 is carried out analogously to example 1 about

150

50

75

90

1320 2

25

10 85.5

4.48 4.54 4, 79

98

92

82

Analysis of the data presented in the table shows that using the described method provides an improvement in the quality of the raffinato obtained. Thus, the refractive index of the non-dewaxed raffinate is 1.4862-1.4879, instead of 1.4884 by a known method. The indicator characterizing the viscosity ratio of the raffinate at 50 and 100 ° C decreases by 4.2-6.5%, and the viscosity index of the dewaxed oil increases by 9-16 points compared to the same indicator for the raffinate obtained by a known method .

Compiled by L.Ivanova Tehred M.Hodanich

Thioazh 462

VS-MPI of the USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, uloProektna, 4

37396

Claims (1)

It is impractical to clean the oil fractions of oil with solvent compositions that go beyond the limits claimed, since in this case the refractive index of the raffinates is at the level of the known method. alcohol, which is indicated by the fact that, in order to improve the quality of the purified fractions, 3-methyl-1,3-butanediol in the amount of 3-20 wt.% is used as the alcohol in the calculated solvent. Proofreader S. Cherni Subscription