Process of extracting from haw-pit by dry distillation and its device
US6821394B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Apr 21, 2003 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Apr 21, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a process of extracting haw pits by dry distillation and the device used therein. The process includes the following steps: removing the impurities of haw pits and drying them; immersing haw pits in water and then dripping and charging the dried pit into the furnace for dry distillation; gradually raising the temperature and dry distilling the haw pits at two temperature ranges of 105-195° C. and 305-380° C. respectively and collecting the distillate; mixing together the distillate, allowing them to separate into layers by specific gravity difference and separating out the final brownish red transparent liquor by siphon. The method of the present invention can provide high yield of extraction and the present device is simple in structure. Further, the present invention is easy to be employed on the industrial scale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.