Glycol injection process

Dehydration can be performed by a number of methods cooling, absorption and adsorption. Water removal by cooling is simply a condensation process at lower temperatures the gas can hold less water vapour. This method of dehydration is often used when gas has to be cooled to recover heavy hydrocarbons. Inhibitors such as glycol may have to be injected upstream of the chillers to prevent hydrate formation. 

It is possible to inject glycol in a gas line and have it absorb the water vapor in co-current flow. Such a process is not as efficient as countercurrent flow, since the best that can occur is that the gas reaches near equilibrium with the rich glycol as opposed to reaching near equilibrium with... 

Write out the complete reactions for polyurethane production starting with toluene, natural gas, air, water, and salt, as sketched in Figure 11-8. Use 1,4-butane diol for the glycol starting from butane. Why is this process preferable for reaction injection molding of automobile parts compared to Nylon or PET ... 

The solid ammonium carbonate and carbamate are much more difficult to remove than the hydrates (Townsend and Reid, 1978, p. 100). The natural gas industry has opted for methanol and glycols, which may be injected into pipelines and processes without undesirable side reactions. 

ICP s. The BCA hanopolyesters prepared with 1,4-butanediol or 1,6-hexanediol and their oopolyesters with ethylene glycol, 1,4-butanediol, or 1,6-hexanediol had suitable melting points and melt processing characteristics for injection-molding applications. 

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