Method of preparing CAPG for drilling fluid

An alkyl glycoside and cation technology, which is applied in the preparation of sugar derivatives, drilling compositions, chemical instruments and methods, etc., can solve the problems of low final yield, harsh reaction conditions, long reaction time, etc. The effect of short time, mild reaction conditions and simple process operation

Inactive Publication Date: 2012-11-21
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Combining the previous methods, the reaction time is very long, the reaction conditions are harsh, organic

Method used

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  • Method of preparing CAPG for drilling fluid

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Embodiment 1

[0017] In a 500mL four-necked flask equipped with a thermometer, condenser, and stirrer, add 0.2mol of epichlorohydrin, 2.4mol of distilled water and 0.004mol of p-toluenesulfonic acid, and react for 3h at normal pressure at a temperature of 60°C to obtain a colorless Transparent aqueous solution of 3-chloro-1,2-propanediol; cool down to room temperature, add 0.40 mol of methyl glucoside, react at normal pressure, temperature 80°C for 0.5 h, and obtain a colorless transparent viscous liquid of chlorohydrin glycoside; Cool down to room temperature, neutralize with saturated sodium hydroxide aqueous solution to pH ≈ 7; then add 0.04 mol aqueous trimethylamine aqueous solution with a concentration of 33.3% to the bottom of the chlorohydrin glucoside aqueous solution through a self-made dripping device, and control the addition within 1 hour; At a temperature of 40°C, react for 3 hours to obtain a light yellow transparent liquid of cationic methyl glucoside, and the product yield a...

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Abstract

The invention discloses a method of preparing CAPG (Cationic alkyl polyglucoside) for a drilling fluid, and belongs to the technical field of chemical drilling fluid treating agents in oilfields. The method comprises the following steps: (1), reacting the materials of epoxy chloropropane, water and a catalyst at the molar ratio of 1:(12-20):(0.02-0.12) at the temperature of 60-100 DEG C for 3-8 h, so as to obtain a 3-chlorine-1, 2-propylene glycol aqueous solution; (2), reacting alkyl polyglucoside and the 3-chlorine-1, 2-propylene glycol aqueous solution at the molar ratio of 1: (0.5-5) at the temperature of 80-110 DEG C for 0.5-4.0 h, so as to obtain a chlorohydrin polyglucoside aqueous solution; and (3) neutralizing the chlorohydrin polyglucoside aqueous solution with a neutralizer to an extent that the pH value is 6-9, then adding tertiary amine, and finally reacting tertiary amine and chlorohydrin polyglucoside for 3 to 10 h at the temperature of 40-80 DEG C and a normal pressure so as to obtain a CAPG aqueous solution, wherein the molar ratio of the tertiary amine to the chlorohydrin polyglucoside is 1: (0.2-1.2). According to the method, the CAPG has an excellent shale inhibition performance, and through the CAPG aqueous solution with the concentration of 1%, the primary recovery rate of the shale is 95.55 percent, while the secondary recovery rate is 94.70 percent, and the relative recovery rate is up to 99.11 percent at the temperature of below 120 DEG C.

Description

Technical field: [0001] The invention relates to a preparation method of an alkyl glycoside derivative, in particular to a preparation method of a cationic alkyl glycoside, and belongs to the technical field of oilfield chemical drilling fluid treatment agents. Background technique: [0002] Cationic alkyl glycoside is a kind of drilling fluid treatment agent produced by non-ionic alkyl glycoside. It not only has abundant and cheap raw materials, but also has excellent performance and good biodegradability. In recent years, it has gradually attracted the attention of scholars at home and abroad. U.S. Patent (US5773595) disclosed on June 30, 1998 to react under the catalysis of sodium hydroxide utilizing dodecyl glucoside and cationic etherifying agent 3-chloro-2-hydroxypropyltrimethylammonium chloride, one-step A method for the preparation of cationic alkyl glucosides. This method is simple in technology, but the reaction time is long, it needs 46h, and the conversion rate ...

Claims

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Application Information

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IPC IPC(8): C07H15/04C07H1/00C09K8/035
Inventor 司西强王中华魏军甄剑武雷祖猛赵虎张麒麟
Owner CHINA PETROLEUM & CHEM CORP
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