Source detection and removal of organic chloride component in crude oil

摘要

Organic chloride or undesaltable chloride contamination in crude oil can cause HCl to be formed during hydrotreating process, which can corrode equipment through accumulation; therefore, piping and vessels can wear dangerously thin and become susceptible to leaks and explosions in both upstream and downstream units. For this reason, the acceptable concentration of organic chloride should ideally be kept below 1ppm. Our research was carried out in accordance with ASTM D 4929, section 11 procedure for collecting the naphtha cut at 204°C (400°F) and the distillation method was adapted from ASTM D 86 for the distillation of petroleum products. The results of this investigation showed the followings: 1. Controlling of excessive organic chloride in crude oil is highly important and must be taken seriously as a corrosive component, 2. However there are methods available and applicable for the management of this component during hydrotreating process or even before formation of organic chloride, 3. The organic chloride content of crude oil can be controlled by detecting its sources, such as: a. Chlorinated solvents and additives used in crude oil production, transportation and storage tanks, b. Chemicals used in enhanced oil recovery processes, c. Unmonitored disposal of various chlorinated compounds in crude oil storage tanks.