Dehydration of natural gas

The largest use of NMP is in extraction of aromatics from lube oils. In this appHcation, it has been replacing phenol and, to some extent, furfural. Other petrochemical uses involve separation and recovery of aromatics from mixed feedstocks recovery and purification of acetylenes, olefins, and diolefins removal of sulfur compounds from natural and refinery gases and dehydration of natural gas. 

Figure 8.33 Dehydration of natural gas is easily performed by membranes but high cost may limit its scope to niche applications...

Triethylene glycol (HOCH2CH2OCH2CH2OCH2CH2OH) finds principal use in the dehydration of natural gas and as a humectant. 

Diethylene glycol usage is about 800 million lb/year in the United States. Major uses are unsaturated polyester resins (21%), polyurethane resins (21%), and antifreeze blending (10%). Other applications include use as raw materials for triethylene glycol (7%) and for morpholine (7%). Diethylene glycol is also used for dehydration of natural gas and in textile conditioning. 

Dehydration of natural gas is necessary to prevent the formation of gas hydrates, which can plug valves and other components of a gas pipeline, and also to reduce potential corrosion prob-... 

Use Production of polyurethane and unsaturated polyester resins, triethylene glycol textile softener petroleum solvent extraction dehydration of natural gas, plasticizers, and surfactants solvent for nitrocellulose and many dyes and oils humectant for tobacco, casein, synthetic sponges, paper products cork compositions, bookbinding adhesives, dyeing assistant, cosmetics, antifreeze solutions. 

Use Solvent and plasticizer in vinyl, polyester, and polyurethane resins dehydration of natural gas hu-mectant in printing inks extraction solvent. 

Drying of gas streams. One important example is dehydration of natural gas. EUminates use of solvents for this application. 

Uses Prod, of polyurethane and unsat. polyester resins, triethylene glycol, morpholine, paints textile softener, lubricant solvent for nitrocellulose, dyes, oils, printing inks extraction solvent dehydration of natural gas, plasticizers, surfactants humectant for tobacco, casein, and syn. sponge cork compositions bookbinding adhesives dyeing assistant cosmetics antifreeze ingred. PU chain extender processing aid ac-... 

Response 1 We agree with your analysis above. 1910.106(b) and 1910.106(i) do not apply to the design/fabrication/construction/installation (construction) of pressime vessels used for oil and gas production processing purposes such as you described, i.e. separation of oil/ water/gas and the dehydration of natural gas. 

In this chapter, we have focused on some peculiarities of microemulsion systems, namely the internal structure, balance of intermolecular forces, and potentialities in mass transfer operations, which are advantageously exploited in applications in the petroleum industry. Several microemulsion systems may be used as alternatives to conventional techniques, for example, in dehydration of natural gas, corrosion inhibition on metallic surfaces, development of novel fuel formulations, and enhanced oil recovery. 

In some cases dry bed dehydration is actually less costly than glycol absorption. Such a case, as described by Alexander (1988), is the dehydration of natural gas at an offshore platform. A glycol plant for the proposed service would be uneconomical because of the requirement for a complex system to recover vapors from the glycol still to avoid air pollution problems. Silica gel was selected for this plant in favor of alumina to avoid the catalytic effect of... 

Swerdloff, W., 1967, Dehydration of Natural Gas, Proc. Gas Conditioning Conf., University of Oklahoma, Norman, OK. 

Another dehydration process is the Drizo gas dehydration process that uses high glycol concentrations to give low due point temperatures and uses a solvent to recover extracted aromatics [30]. Trayed columns with a variety of structured proprietary packings have also been used for dehydration of natural gas in arctic gas production [31]. 

Though all types of glycols can be used in the design of dehydration units, the most commonly used glycol, for the dehydration of natural gas, is ethylene glycol. The discussions of design aspects will be based on the use of ethylene glycol. 

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