Abstract: This disclosure concerns an improved process for preparing a synthetic hydrocarbon lubricant composition, said composition consisting essentially of di-long-chain alkyl-substituted aromatic hydrocarbons. The improved process is directed to a two-step alkylation process, using linear mono-olefins as the alkylating agent, and in which the first alkylation is conducted using HF as the catalyst, wherein the improvement comprises using aluminum chloride or aluminum bromide as the catalyst for the second alkylation step. Use of aluminum chloride or aluminum bromide, instead of HF, in the second alkylation step results in a product having better low temperature properties.

Abstract: An improved anionic waterflood additive is prepared by partially chlorinating a normal alkane having about 10 to about 18 carbon atoms to about 2 to about 15 weight percent chlorine content, employing the chlorinated alkane to alkylate an aromatic hydrocarbon, such as benzene; sulfonating the thus formed alkylate or a fraction thereof to form a sulfonic acid; converting the sulfonic acid to a sulfonate by reacting with a base component, such as an alkali metal hydroxide, ammonium hydroxide, or an alkali metal carbonate; and overbasing the sulfonate by admixing with an excess of base component such that the ratio: "weight of excess base component/weight of sulfonate" is about 0.03 to about 3.0. The anionic waterflood additive is injected into a petroliferous formation, the formation is waterflooded, and oil is recovered.

Abstract: An improved anionic overbased waterflood additive comprises a base component, a first sulfonate component derived from an alkylation reaction product employing a branched-chain alkene as the alkylating agent, and a second sulfonate component derived from an alkylation reaction product employing a partially chlorinated normal alkane as the alkylating agent, wherein the base component is present in the weight ratio range of 3/100 to 300/100, base component to total sulfonate, and wherein the weight ratio of the first sulfonate component to the second sulfonate component is in the range of 1/9 to 9/1. The overbased waterflood additive may be formed prior to injection into a petroliferous formation or may be formed in situ by first injecting the total sulfonate followed by the base component.

Abstract: An improved anionic waterflood additive is prepared by alkylating an aromatic hydrocarbon such as benzene with a branched-chain alkene having about 10 to about 35 carbon atoms such as a propylene tetramer dimerization reaction product in the presence of an alkylation catalyst such as AlCl.sub.3 ; sulfonating the thus formed alkylate product or a fraction thereof to form a sulfonic acid; converting the sulfonic acid to a sulfonate by reacting with a base component such as an alkali metal hydroxide, ammonium hydroxide, or an alkali metal carbonate; and overbasing the sulfonate by admixing with an excess of base component such that the ratio; "weight of excess base component/weight of sulfonate" is about 0.03 to about 3.0. The anionic waterflood additive is injected into a petroliferous formation, the formation is waterflooded, and oil is recovered.