Isomeric Product Detection in the Heterogeneous Reaction of Hydroxyl Radicals with Aerosol Composed of Branched and Linear Unsaturated Organic Molecules
作者:Theodora Nah、Haofei Zhang、David R. Worton、Christopher R. Ruehl、Benjamin B. Kirk、Allen H. Goldstein、Stephen R. Leone、Kevin R. Wilson
DOI:10.1021/jp508378z
日期:2014.12.11
hydroxyalkyl radical. In addition, allylic alkyl radicals, formed from H atom abstraction reactions by hydroxyalkyl or OH radicals play important roles in the chemistry of product formation. Functionalization products dominate the squalene reaction at ∼1% [O2], with the total abundance of observed functionalization products being approximately equal to the fragmentation products at 10% [O2]. The large
研究了不饱和有机气溶胶非均相氧化过程中分子结构(支链或线性)对产物形成的影响。由角鲨烯(C 30 H 50,具有六个C═C双键的支链烯烃)和亚麻酸(C 18 H 30 O 2,具有三个C═C双键的线性羧酸)反应形成的颗粒相产物异构体使用二维气相色谱-质谱法鉴定和定量带有OH自由基的化合物。在低和高[O 2 ]时测量反应(〜1%对10%[O 2])了解羟烷基和羟过氧自由基中间体在产物形成中的作用。关键的反应步骤是将OH加成C═C双键以形成羟烷基基团。另外,由H原子抽象反应通过羟烷基或OH自由基形成的烯丙基烷基自由基在产物形成的化学中起重要作用。官能化产物以约1%[O 2 ]占主导地位,在角鲨烯反应中,观察到的官能化产物的总丰度大约等于10%[O 2 ]时的裂解产物。10%[O 2时,大量的角鲨烯裂解产物]归因于叔羟基烷氧基自由基中间体的形成和离解。对于亚麻酸气溶胶,官能化产物的形成在1%和10%[O
EXTREME-PRESSURE ADDITIVE, PROCESS FOR PRODUCING THE SAME, CUTTING FLUID, AND GRINDING FLUID
申请人:DAINIPPON INK AND CHEMICALS, INC.
公开号:EP1116782A1
公开(公告)日:2001-07-18
The present invention provides a sulfur-based extreme-pressure additive that is completely soluble in water without using a surfactant, and has satisfactory odor and hue. In addition, the present invention provides a cutting liquid and grinding liquid having superior defoaming property and rust preventive characteristics, while also having high load resistance and lubrication performance comparable to cutting oils and grinding oils of the prior art. The above objects are achieved by an extreme-pressure additive comprising the salt of a condensation product of a sulfurized hydroxy-unsaturated fatty acid, the condensation product having a sulfur content of 8 to 15% by weight (mass), color of 6 or less, and acid value of 80 to 200, and a grinding liquid comprising that extreme-pressure additive and water.