- RCP
- Reciprocal calculation procedure
- Refining
- Conversion of crude oil into useful products, such as naphtha, the most important feedstock for the petrochemical industry. Every refinery begins with the separation of crude oil into different fractions by distillation. The fractions are further treated to convert them into mixtures of more useful products by various methods such as cracking, reforming, alkylation, polymerisation and isomerisation. These mixtures of new compounds are then separated using methods such as fractionation and solvent extraction.
- Reforming
- The thermal or catalytic conversion of petroleum naphtha into more volatile products of higher octane number. It represents the total effect of numerous simultaneous reactions such as cracking, polymerisation, dehydrogenation, and isomerisation.
- Resin
- Any natural or synthetic organic compound consisting of a non-crystalline or viscous liquid substance. Natural resins are organic substances that are transparent or translucent, formed in plant secretions. Synthetic resins comprise a large class of synthetic products that have some of the physical properties of natural resins but are different chemically. Most synthetic resins are polymers. The term resin dates from the early years of the plastics industry; it originally referred to naturally occurring amorphous solids such as shellac and rosin. See also plastics.
- Responsible Care
- Responsible Care is the chemical industry's commitment to continuous improvement in all aspects of health, safety and environment performance and to openness in communication about its activities and achievements. More...
- Risk
- Risk should be clearly distinguished from hazard. Risk is the chance that a given hazardous effect will occur. The use of fire by humans is an example of optimising the balance between hazard and risk, as fire, being extremely hazardous, must be used under carefully controlled conditions to keep risks to a minimum.
- Risk Assessment
- Substances on European priority lists must undergo an in-depth risk assessment covering the risks posed by the priority chemical to man (covering workers, consumers and man exposed via the environment) and the environment (covering the terrestrial, aquatic and atmospheric eco-systems and accumulation through the food chain). This risk assessment follows the framework set out in European Commission Regulation (EC) 1488/94 and implemented in the detailed Technical Guidance Documents (TGD) on Risk Assessment for New and Existing Substances. The first draft of the risk assessment reports are written by the Member States which act as "rapporteurs". The Commission mediates the meetings, which attempt to reach consensus on the conclusions of the risk assessments. For more information, see the Chemicals Management section.
- ROI
- Return on Investment
- Rubber
- Synthetic rubber, as opposed to natural rubber (obtained from the exudations of certain tropical trees), is derived from petroleum and natural gas. Because of its elasticity, resilience, and toughness, rubber is the basic constituent of the tires used in automotive vehicles, aircraft, and bicycles. Rubber is also used in electrical insulation, and because it is waterproof, it is a favoured material for shoe soles.


