A kind of preparation method of lubricant for water-based synthetic cutting fluid
A cutting fluid and lubricant technology, applied in lubricating compositions, additives, petroleum industry, etc., can solve problems such as mildew, odor, poor cooling performance, poor permeability stability, and short service life, so as to improve lubricity and wetting properties, excellent settling properties of iron filings, and strong self-emulsifying ability
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[0017] The invention provides a method for preparing a lubricant for water-based synthetic cutting fluid. Under the action of a catalyst, fatty acids, unsaturated olefins or acid anhydrides, vegetable oils, polyether polyols, and monohydric fatty alcohols are sequentially passed through Diels-Alder The reaction and the esterification reaction are prepared in three steps, and the specific steps are as follows:
[0018] (1) At room temperature, add fatty acid and catalyst into a four-necked flask with a thermometer, agitator and reflux condenser, raise the temperature slowly, add unsaturated olefin or acid anhydride in batches at 50-60 degrees, and continue to rise Temperature to 200-260 degrees, react for 1-5 hours, stop the reaction, cool down to room temperature;
[0019] (2) At room temperature, add the reaction product of step (1) and vegetable oil in a four-necked flask inserted with a thermometer, agitator, water separator and reflux condenser, slowly heat up, drop or div...
Embodiment 1
[0030] (1) At room temperature, add 200 g of tall oil fatty acid and 0.5 g of iodine into a 500 mL four-neck flask inserted with a thermometer, a stirrer, a water separator, and a reflux condenser, and slowly heat up, at 50-60 degrees (preferably 50 32.8g of acrylic acid was added dropwise at 250°C, and the temperature was raised to 250°C for 2 hours, then the reaction was stopped, and the temperature was lowered to room temperature; Add 150g of the first step product and 50g of coconut oil into a 500mL four-neck flask, slowly raise the temperature, add 52g of PPG400 dropwise at 80-90 degrees (preferably 80 degrees), continue to raise the temperature to 220 degrees, react for 5 hours, and stop the reaction (3) The temperature of the reaction product in the second step was lowered to 60°C, 10g of butanol and 0.2g of toluenesulfonic acid were added, the temperature was raised to 230°C, the reaction was carried out for 5.5 hours, and the reaction was stopped to obtain the final pr...
Embodiment 2
[0032] (1) At room temperature, add 160 g of tall oil fatty acid and 0.8 g of iodine into a 500 mL four-neck flask inserted with a thermometer, a stirrer and a reflux condenser, slowly heat up, and divide the mixture at 50-60 degrees (preferably 50 degrees). Add maleic anhydride 38g in batches, continue to raise the temperature to 220 degrees, react for 3.5 hours, stop the reaction, and cool to room temperature; Add the first step product 24g, vegetable oil 120g in the mouth flask, slowly heat up, drip PEP400 106g under 80-90 degree (preferably 80 degree), continue raising temperature to 210 degree, react 5 hours, stop reaction; (3 ) The temperature of the reaction product in the second step was lowered to 60°C, 12g of octanol and 0.4g of boron trifluoride ether were added, the temperature was raised to 220°C, the reaction was carried out for 6 hours, and the reaction was stopped to obtain the final product.
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