Method of facilitating low temperature discharge from a container of particulate material
US4338359A · kind A · utility
9Cited by
14References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1981 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Mar 16, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D7/22
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Low temperature discharge of particulate material from a hopper or the like is facilitated by coating the hopper walls with a water solution of an inorganic freeze point depressant, the solution having a freezing point below about -20.degree. C. and being thickened by the addition thereto of a compatible thickening agent, whereby the substance can be readily applied to the wall and will remain in position on the wall. When the substance is to be used to coat steel or aluminum walls the pH of the substance is modified if necessary to prevent corrosion of the wall without adversely affecting the viscosity of the substance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.