Preparation method of condensation point reducer with dual functions of reducing condensation point and turbidity point

Abstract

The invention provides a preparation method of a condensation point reducer with dual functions of reducing condensation point and turbidity point, which comprises the following steps: (1) mixing C8-C18 straight-chain fatty alcohols and methacrylic acid in a mol ratio of (1.02-1.2):1, adding diluent oil as a solvent, adding a polymerization inhibitor hydroquinone and a catalyst p-methylbenzenesulfonic acid, and reacting at 100-140 DEG C for 2-8 hours under the catalytic action of acid to generate a high-carbon alcohol methacrylate crude product; (2) neutralizing the high-carbon alcohol methacrylate crude product obtained in the step (1) with alkali liquor until the pH value is 7, separating the organic layer, and dehydrating at 80-150 DEG C for 1-8 hours to obtain the high-carbon alcohol methacrylate; and (3) adding acid anhydride or ester and an initiator benzoperoxide into the high-carbon alcohol methacrylate obtained in the step (2), and reacting at 70-130 DEG C for 5-10 hours to obtain the polymer. The condensation point reducer provided by the invention has dual functions of reducing both condensation point and turbidity point of the base oil, thereby eliminating the hidden danger of flammability and explosiveness.

Description

Technical field [0001] The invention belongs to the field of petroleum additives, and specifically relates to a method for preparing a pour point depressant with dual functions of reducing pour point and turbidity. Background technique [0002] The freezing point and cloud point are an important low-temperature performance index of lubricating oil, which has an important impact on the use, storage and transportation of lubricating oil. The pour point depressant is generally an oil-soluble polymer, and its molecular structure should contain polar groups. Clusters and alkyl chains similar in structure to paraffin hydrocarbons, through the adsorption or co-crystallization of the pour point depressant molecules on the wax surface, have an effect on the growth direction and morphology of the wax crystals, preventing the crystal particles from approaching and bonding, preventing the precipitated wax from further combining It forms a three-dimensional network of crystals, thereby changi...

AI Technical Summary

Problems solved by technology

The existing pour point depressant can only lower the pour point of the oil, but cannot change its cloud point. At the same time, the esterification reaction is an important step in the production of methacrylic acid in the production process of the pour point depressant. The traditional method is to use an organic solvent Toluene, benzene, cyclohexane, etc. are used as water-carrying agents, which are not only flammable and explosive, but also prone to poisoning accidents. Some of the water-carrying agents in the discharged water will also pollute the environment

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