Patent · US Active

Process for separation and purification of sodium sulfide

US9114988B2 · kind B2 · utility

2Cited by

7References

6Claims

0Family size

Assignee

ADITYA BIRLA SCIENCE AND TECHNOLOGY COMPANY PVT. LTD. · IN

Inventors

Sandeep Vasant Chavan · Mumbai, IN
Kini Harshad Ravindra · Mumbai, IN

Key dates

Filing date	Apr 12, 2012
Grant date	Aug 25, 2015
Priority date	—
Expiry date	Apr 12, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10G2300/202
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The present disclosure provides a method for isolation and purification of sodium sulfide (Na2S) formed during desulfurization of petroleum residue. The process involves treating a sludge containing Na2S obtained during desulfurization of petroleum residue with a mixture of at least one organic solvent and water.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.