نتایج جستجو برای: chemical cleaning
تعداد نتایج: 395899 فیلتر نتایج به سال:
MicrosoftInternetExplorer4 Background and Objectives: since there is not any information about the quality and quantity of carpet cleaning wastewater, this study was done for the evaluation of carpet cleaning wastewater characterization in Tehran.Materials and Methods: There are 122 carpet-cleaning units in Tehran. Compound samplings were taken from 10 randomly selected carpet-cleaning...
Background During a series of visits to pharmaceutical and fine chemical plants, a SpotView system was used to develop preliminary calibrations for various APIs, excipients, and cleaning materials. The calibrations were based on sets of spectra collected from standard coupons. In the first case, the calibration was challenged with a set of samples that had been independently prepared, some spik...
RATIONALE Cleaning tasks may imply exposure to chemical agents with potential harmful effects to the respiratory system, and increased risk of asthma and respiratory symptoms among professional cleaners and in persons cleaning at home has been reported. The long-term consequences of cleaning agents on respiratory health are, however, not well described. OBJECTIVES This paper aims to investiga...
This work investigates the root causes of the incidence of solder flux residue underneath electronic components in the manufacture of power modules. The existing deionized water-based centrifugal cleaning process was analyzed and hypotheses for root causes of the problem were proposed. The experimentation included cleaning tests using agitation and soak cycles. Parameters such as chemical agent...
The vast majority of dry cleaners worldwide use the toxic chemical perchloroethylene (PCE), which is associated with a number of adverse health and environmental impacts. Professional wet cleaning was developed as a nontoxic alternative to PCE dry cleaning but has not been widely adopted as substitute technology. In the greater Los Angeles, CA, region, a demonstration project was set up to show...
The manufacturing industry today uses many kinds of chemicals in its cleaning processes. The industrial cleaners often contain some sort of degreasing chemical to clean parts and components before the main processes, for instance assembly or surface treatment. These types of cleaning methods are often expensive and involve hazardous handling of chemicals in manufacturing, as well as in the tran...
Cleaning in place (CIP) is a method of cleaning inner surfaces of piping, vessel, equipment, and associated fitting with disassembly. Although, the CIP processes have been studied continually to improve efficiency for chemical and water consumption, the real conventional plant operations of this process still have been considered as a large amount of consumption. The objectives of this work are...
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