摘要:
The invention consists, generally, of a method for automatically reducing power to an electron emitting cathode by sensing an operating condition of the electron emitting cathode, calculating a condition number based upon the operating condition, comparing the condition number to a threshold value, and reducing the power to the electron emitting cathode when the condition number is greater than the threshold. The apparatus and method may be implemented upon a system having a high voltage power source, an RF tube, a control processor, and a signal processor.
摘要:
It was found that the process for the nitration of halogenated aromatic compounds is improved by carrying out the nitration in the presence of a phosphorus compound in an amount sufficient to produce an ortho-directive effect. The addition of polyvalent metal elements such as vanadium, molybdenum, tungsten, and other elements that have the capability of existing in a variety of oxidation states, to a mixture of phosphoric and nitric acid improves the yield of the nitrohaloaromatics without affecting the isomer ratio.