The composition of the solvent for the separation of petroleum products

 

(57) Abstract:

The solvent for the separation of oil contains acetone 50; isopropyl alcohol 40; stable nitroxyl radical 0,02 1,0; water, to 100. 3 table.

The invention relates to the refining and petrochemical industries, in particular solvents for the separation of hydrocarbon fractions by chemical composition.

With the development of catalytic cracking in the fuel balance of the country, an increasing share of the secondary middle distillates. Due to poor chemical composition they are typically used as components of the furnace, marine and gas turbine fuels, which is not economically advisable.

The aim of the invention is to increase the output dearomatizing product obtained by extraction of the light gas oil catalytic cracking (LGCC) solvent for use as a high quality component of diesel fuel, improve the physical and chemical properties of the latter.

There are various formulations of solvents for the separation of petroleum products, for example on the basis of heterocyclic compounds [1, 2] lanproton [3, 4]

However, these solvents are not ISI regeneration of the solvent, the limited resource base, high cost.

Also known composition of the solvent used for the separation of petroleum fractions [5] consisting of flooded acetone (70-99% acetone and 30-1% water). A significant drawback is the high mutual solubility with any (chemical composition) hydrocarbons (PL. 1). As raw materials when testing the optimal modes always used a model blend consisting of 70% -methylnaphthalene and 30% tridecane.

The closest to the technical essence and the achieved result is the composition of the solvent [6] containing the wt. Acetone Water 5.60 5.20 2-Propanol Else

The solvent is readily available, inexpensive, allowing to carry out the extraction at low temperature.

However, the resulting outputs of the raffinate and the quality is poor even at high multiplicity of the solvent, and to simultaneously achieve a sufficiently deep dearomatization and large output of raffinate impossible (PL. 2).

The elimination of the negative sides of this solvent is possible by modifying the properties of the extractant.

Proposed composition of the solvent, wt. Acetone 50, 2-Propanol 40,

Stable nitro - silny radical of 0.02.1, Vodki to the mixture watered acetone propanol.

As can be seen from the data (table. 3), the addition of stable nitroxyl radicals to the mixture watered acetone from 2-propanol increases the yield of raffinate, depending on the ratio of solvent to 15.45% allowing simultaneously selected outputs of the raffinate and its quality.

The use of stable nitroxyl radicals is limited to 1 wt. because of this low number does not change the physical nature of the solvent and allows the use of existing technological scheme and the existing installation of extraction.

The solvent is circulated in the system together with the radical, as the complexing ability of the latter with the greatest polar solvents [10] and the radicals have the ability to improve the acceptor properties of the extractant.

Used nitroxyl radicals: 2,2,6,6-tetramethyl-4-oxopiperidin-1-oxyl (P-1) and of 2.2.5.5-tetramethyl-4-phenyl-3 - imidazolin-1-oxide (P-2). Their physicochemical properties are shown below.

Nitroxyl radical 2,2,6,6-tetramer-4-oxopiperidin-1-oxyl (designation (text) R-1): Mol.m. 172 Temperature plale deposits,aboutWith 70.5 solubility in water, 10-2< / BR>
The hyperfine constant taimedislim-1-oxyl, (P-2) Mol.m. 217 Temperature plale deposits,aboutWith 80 solubility in water, 210-3< / BR>
The hyperfine interaction constant, e 1,460,29

As raw materials, modeling kerosene-gas oil fraction, was used a mixture of methylnaphthalene and tridecan in the ratio of 7:3. The ratio of solvent to raw materials (100:150:390) by mass.

The extraction was carried out by the analytical method in the apparatus of the mixer-settler, imitating one theoretical stage of extraction at 25aboutC. the Resulting two-phase system thermostatically using L-8H with accuracy of 0.2aboutC. removing the solvent phase was carried out by washing with distilled water. Mixing time phases 10 min, defending the 1 o'clock conditions of the extraction, the yield of raffinate and its quality are given in table. 3.

Changes in the concentration of radicals R-1 and R-2 is several orders of magnitude (from 10-2up to 1% ) increases the yield of raffinate at 15-45% and the structure introduced into the extractant radical practically no effect on the yield of raffinate.

The composition of the SOLVENT FOR the SEPARATION of PETROLEUM products containing acetone, isopropyl alcohol and water, wherein the solvent further comprises a stable nitroxyl the Stable nitroxyl radical 0,02 1,0

Water To 100

 

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