Trachyspermum copticum seed oil contains volatile oil rich in thymol, which is distilled out and used for medicinal and aromatic formulations. The seed powder after removal of the volatiles loses its importance. However, the fixed oil being rich in unsaturation with petroselinic acid (18:1, Δ6; 68.3%) and linoleic acid (18:2; 25.3%) is used for preparing biolubricant base stocks. Methyl, isopropyl and 2-ethyl hexyl esters of the oil have been converted to epoxides, followed by in situ hydroxylation and acylation using hexanoic and butyric anhydrides. The acylated products have been evaluated for lubricant properties, and are found to exhibit density (0.91-0.97 g/cc); viscosity of 23.5-27.3 cSt at 40°C and 4.85-5.33 cSt at 100°C. The values are comparable to jatropha acylated products. The products exhibited good copper corrosion resistance value of ‘1a’ and high flash points of 230-242°C. The acylated esters with good weld load behavior, and lower wear and pour point values and viscosity indices, 128.84-138.94, can be potential base stocks belonging to group III category lubricants with ISO VG Grade about 22. These products can be further explored for the preparation of hydraulic, metal working and other industrial fluid formulations.

中文翻译：

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含黄连木种子油的戊二酸酯：潜在的工业润滑剂基础油

菱形黄连种子油中含有富含百里酚的挥发油，可将其蒸馏出来，用于药用和芳香剂配方。除去挥发物后的种子粉末失去了重要性。但是，富含石油酸（18：1，Δ6； 68.3％）和亚油酸（18：2； 25.3％）的不饱和度的不挥发性油用于制备生物润滑剂基础油。该油的甲基，异丙基和2-乙基己酯已转化为环氧化物，然后就地转化使用己酸酐和丁酸酐进行羟基化和酰化。对酰化产物的润滑剂性能进行了评估，发现其密度（0.91-0.97 g / cc）；40°C时粘度为23.5-27.3 cSt，100°C时粘度为4.85-5.33 cSt。该值可与麻风树酰化产物相比。该产品具有良好的耐铜腐蚀性能值'1a'和高的闪点230-242°C。具有良好焊接负荷性能，较低的磨损点和倾点值和粘度指数128.84-138.94的酰化酯可能是属于属于ISO VG等级22的III类润滑剂的潜在基础油。制备液压，金属加工和其他工业流体配方。