The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2015
Filed:
Sep. 30, 2013
Pushpito Kumar Ghosh, Gujarat, IN;
Haresh Mahipatlal Mody, Gujarat, IN;
Rajesh Shantilal Somani, Gujarat, IN;
Pratyush Maiti, Gujarat, IN;
Maheshkumar Ramniklal Gandhi, Gujarat, IN;
Hari Chand Bajaj, Gujarat, IN;
Jatin Rameshchandra Chunawala, Gujarat, IN;
Sumesh Chandra Upadhyay, Gujarat, IN;
Pushpito Kumar Ghosh, Gujarat, IN;
Haresh Mahipatlal Mody, Gujarat, IN;
Rajesh Shantilal Somani, Gujarat, IN;
Pratyush Maiti, Gujarat, IN;
Maheshkumar Ramniklal Gandhi, Gujarat, IN;
Hari Chand Bajaj, Gujarat, IN;
Jatin Rameshchandra Chunawala, Gujarat, IN;
Sumesh Chandra Upadhyay, Gujarat, IN;
Abstract
A method of producing soda ash and ammonium sulphate by recycling by-products of Merseberg and Solvay processes includes treating brine with soda ash distiller waste for desulphatation of the brine to obtain gypsum, recovering pure salt from the desulphated brine and utilizing it in manufacture of soda ash in a Solvay process, washing the gypsum and reacting it with liquor ammonia and carbon dioxide to obtain CaCOand ammonium sulphate, separating the CaCOfrom the ammonium sulphate solution and recovering solid ammonium sulphate, washing the CaCOfollowed by calcination to generate COand lime, recycling the COin the Solvay process to obtain soda ash, recycling the lime with ammonium chloride generated in the Solvay process to recover ammonia and obtain distiller waste containing CaClas a by-product, recycling the by-product distiller waste for the desulphatation of the brine, and recycling the ammonia recovered.