GLycol Dehydration

The Glycol Dehydration Solution for cryogenic process applications

OTSO’s BoneDry™ Glycol Dehy Takes on Mole Sieve 

The BoneDry™ Dehy system’s revolutionary Patented Technology changes the perceived limits of glycol dehydration by meeting all dehydration specs using TEG.

Until now, mole sieve has been the only option for cryogenic spec dehydration.  With the BoneDry Dehy™, glycol performance is extended to meet any dehydration spec.

The intent of the BoneDry™ Dehy is to make the use of mole sieve unnecessary in NGL plants.

How it Works

The BoneDry™ Dehy utilizes glycol to meet the stringent moisture specifications of cryogenic applications with 0.1 ppmv water in the process gas. This is achieved through patented methods, along with notable changes in Glycol contactor height, a combined still / stahl column, stripping gas, and reduced reboiler duty via OTSO’s proprietary Lifterator™ Column technology. All temperatures, pressures, and circulation rates are similar to that seen in a standard glycol dehydration unit.

BoneDry™ Dehy Advantages

  • Substantial Unit Cost Savings
  • Lower Installation Cost
  • Lower Operating Cost
  • Smaller Footprint
  • Less Weight
  • Continuous Process / No Plant Shutdowns
    • Glycol is a continuous process; mole sieve is a batch process
  • Emissions Reduction

A new generation of Glycol Dehydration

OTSO’s Patent Pending DewDry™ Dehy System was created to replace conventional glycol dehydration units. The DewDry™ offers distinct advantages over traditional units, not only in drying performance but in the elimination of vapor emissions as well, making the DewDry™ the premier choice for drying in water and CO2 applications.

Glycol Regenerator

The DewDry™ eliminates the need for a flash gas separator. Until the 1970s, flash gas separators were not a part of glycol dehydration designs. They were added to minimize venting from the still and to remove hydrocarbons. The DewDry™ Dehy handles these two flash gas separator functions in other portions of the glycol regen, thereby making this separator unnecessary.

Bottom Feeder™ Technology

Patent pending Bottom Feeder™ technology directly feeds rich glycol to the bottom of the reboiler where the rich glycol is split into two separate streams.

Pressurized Reboiler

A pressurized ASME code reboiler is used to provide our clients with increased operational control and performance. This is possible through the use of a stahl column and stripping gas to generate lean glycol which is drier than a standard reboiler that operates at near-atmospheric pressure and lacks stripping gas.

The Skurge™ Separator

The patent pending Skurge™ Separator introduces a hydrocarbon / glycol separator upstream of the surge vessel where liquid separation is achieved with mechanical configuration without instrumentation or valves.

Mr. Mister Atomizer Technology

Gas conditioning and pre-contactor technology incorporated into the inlet stream to achieve optimized gas and glycol conditioning.

Moving the Charcoal Filter

The Skurge™ separator allows the charcoal filter to be moved to the lean glycol, just downstream of the Skurge™. Current designs feed rich glycol into the charcoal filter. BTEX in the rich glycol typically saturates the charcoal filter in a matter of hours, thus defeating the filter’s process intent. This location of the charcoal filter allows for full removal of hydrocarbons prior to introducing them into the filter.

Regeneration overhead Vent Stream Handling

FallingWater™ Condenser

The FallingWater™ Condenser allows use of the contactor for heat exchange where water and BTEX condensing occurs with no appreciable pressure drop of the vent stream from the glycol still. Reliable cooling is provided through proprietary means via the heat exchanger of circulating water.

In combination with the pressurized reboiler, a vapor stream is created. Thereby giving our clients control over how the gas is managed. The vapor stream is suitable for feeding a burner or low-pressure compressor. In the event vapors must be flared, they can be delivered to a standard flare system rather than to a dedicated vapor combustor. BTEX and other condensed hydrocarbons are separated at a sufficient pressure to be flowed to a storage tank rather than an underground sump.

OTSO Glycol Dehydrator Systems remove water vapor from the natural gas stream using physical absorption. This process is critical to prevent hydrate formation from plugging the flow line and preventing corrosion, which causes equipment damage. To mitigate such problems, dehydration systems include a contactor tower and a glycol reconcentration system. We offer custom engineer glycol dehydration systems for all flow rate sizes and match performance to meet each applications specific conditions. Whether you opt for a standard, customized or OTSO’s Patent Pending DewDry™ Glycol Dehydration system, all our systems are economical and optimized for performance efficiency.


The OTSO Glycol Dehydration System provides the following main benefits to customers:

  • Removes water to less than 5lbs/MMscf (and can be designed to 1lbs/MMscf)
  • Lowers operating cost with safe, unattended process
  • Automates monitoring of pressure, temperature, etc. via built-in controller
  • Detects problems early with lab analysis of glycol samples
  • Increases system efficiency with specially blended chemicals that reduce corrosion
  • Maximizes performance and minimizes downtime by scheduled maintenance by trained technicians
  • Delivered as a single, skid-mounted system for easy transportation/installation