Abstract A process for producing high-vacuum oils comprises alkylation of condensed and non-condensed aromatic hydrocarbons by means of secondary normal alkylchlorides containing 8 to 12 carbon atoms or mixtures of said chlorides. The alkylchlorides are employed in a molar ratio to the condensed or non-condensed aromatic hydrocarbons of from 2.5:1 to 5:1. The alkylation reaction is conducted at a temperature within the range of from 20° to 100° C. in the presence of from 2 to 15 mol. % of aluminum chloride based on the amount of the employed alkylchlorides until the evolution of hydrogen chloride ceases, whereafter the catalyst is separated from the resulting alkylate. The alkylate is subjected to a vacuum fractionation and the desired fraction is collected which has a boiling temperature within the range of from 220° to 250° C./0.2-0.3 mm Hg, while the preceding fraction is recycled to alkylation stage.
Inventors
👤 Izrail L. Kotlyarevsky
👤 Ninel I. Myakina
👤 Mikhail A. Kamkha
👤 Ivan M. Ikryanov
👤 Svetlana A. Glyadinskaya
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-09 01:12
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/20; C10G29/205
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
148 words
A process for producing high-vaccum oils comprising alkylation of condensed and non-condensed aromatic hydrocarbons with compounds selected from the group consisting of normal secondary alkylchlorides containing 8 to 12 carbon atoms, and mixtures of said chlorides; said alkylchlorides having an iodine number of not more than 1, and being taken in a molar ratio to said condensed and non-condensed aromatic hydrocarbons ranging from 2.5:1 to 5:1; conducting the alkylation reaction at a temperature within the range of from 20° to 100° C. in the presence of 2 to 15 mol.% of aluminum chloride based on the amount of the alkylchlorides employed until the evolution of hydrogen chloride ceases, separating the catalyst from the alkylate produced in the reaction, distilling said alkylate under vacuum, collecting the desired fraction with a boiling range of from 220° to 250° C./0.3 mm Hg and recycling the remaining fractions to the alkylation stage.
Claim 2
Dependent Claim
148 words
A process for producing high-vaccum oils comprising alkylation of condensed and non-condensed aromatic hydrocarbons with compounds selected from the group consisting of normal secondary alkylchlorides containing 8 to 12 carbon atoms, and mixtures of said chlorides; said alkylchlorides having an iodine number of not more than 1, and being taken in a molar ratio to said condensed and non-condensed aromatic hydrocarbons ranging from 2.5:1 to 5:1; conducting the alkylation reaction at a temperature within the range of from 20° to 100° C. in the presence of 2 to 15 mol.% of aluminum chloride based on the amount of the alkylchlorides employed until the evolution of hydrogen chloride ceases, separating the catalyst from the alkylate produced in the reaction, distilling said alkylate under vacuum, collecting the desired fraction with a boiling range of from 220° to 250° C./0.3 mm Hg and recycling the remaining fractions to the alkylation stage.
Claim 3
Dependent Claim
40 words
A process as claimed in claim 1, wherein in order to increase the desired product yield, the remaining fraction with a boiling temperature within the range of from 170° to 220° C./0.3 mm Hg is recycled to the alkylation stage.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 1, wherein as the condensed aromatic hydrocarbon used is made of naphthalene.
Claim 5
Dependent Claim
18 words
A process as claimed in claim 1, wherein as the non-condensed aromatic hydrocarbon use is made of biphenyl.
Claim 6
Dependent Claim
19 words
The process of claim 1, wherein said high-vacuum oils have an iodine number varying from about 0.6 to 1.