alkylate

(redirected from alkylations)
Also found in: Dictionary, Medical, Wikipedia.

alkylate

[′al·kə‚lāt]
(organic chemistry)
A product of the alkylation process in petroleum refining.
References in periodicals archive ?
This section gives an overview of the alkylation unit to establish the main process characteristics and objectives and to identify the causes of fluorine losses.
The system under consideration here is a Phillips-type HF alkylation unit, shown schematically in Figure 2; it has been in operation for nearly 30 years.
Controlling acid strength is important in operation of the alkylation unit for a number of reasons discussed below; therefore an acid regeneration loop is required to remove impurities and return clean acid.
Organic fluorides are formed in the alkylation reactions and require further contact with acid to progress the reaction towards the desired products.
The third treatment route for wastes from the alkylation unit is also the most problematic in terms of the volume of waste generated, additional materials required, manual operations involved and cost to the refinery.
The factors affecting operation were outlined in Existing Alkylation Process and Waste Management above.
Given that the acid re-run bottoms is already neutralized in batches (see Neutralization with Sodium Hydroxide above), this modification should be possible without shutting down the alkylation process itself.
A significant driver was that a shutdown was coming up, making internal changes to the alkylation unit feasible.
Option (e) includes option (d) but would treat the precipitated calcium fluoride with acid to regenerate HF for recycling to the process as alkylation catalyst.