Reducing moisture in granular resin material using inert gas
US11364657B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2020 |
| Grant date | Jun 21, 2022 |
| Priority date | — |
| Expiry date | Mar 28, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B2009/168
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for drying granular resin material in a hopper including a first sub-system, including a membrane and a heater receiving drying gas from the membrane to be heated, the first sub-system supplying dried heated gas to a first portion of the hopper; and a second sub-system, including a mixing device and a heater for receiving drying gas from the mixing device to be heated, the mixing device inducing withdrawal of gas from the hopper and mixing the withdrawn gas with gas supplied from the first subsystem, the mixed gases being heated and supplied to a second portion of the hopper, the improvement comprising a gas separation membrane for separating inert gases from air supplied to the apparatus and providing the separated inert gas in the first subsystem; a heater for heating air supplied to the apparatus; and a thermostat for controlling the heater and thereby maintaining the supplied air at a selected temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.