Company Filing History:
Years Active: 1992-1994
Title: Vasant D Chapnerkar: Innovator in Calcium Carbonate Production
Introduction
Vasant D Chapnerkar is a notable inventor based in Tampa, FL (US). He has made significant contributions to the field of calcium carbonate production, holding 2 patents that showcase his innovative approaches.
Latest Patents
His latest patents include a "Process for production of rhombic shaped precipitated calcium carbonate." This process involves slaking quicklime in an aqueous solution containing about 0.1% to about 2% by weight of sugar, based on the weight of the calcium carbonate to be produced. Carbon dioxide is then added to the slaked lime slurry at a preferred temperature of about 50°F-70°F until the pH drops from about 11-12 to about 7-8. Another significant patent is the "Method for preparing acid resistant calcium carbonate pigments." This method provides an aqueous slurry of particulate calcium carbonate at a pH of from about 11.0 to 12.0, with excess calcium hydroxide. The slurry temperature is raised to about 75°C to 80°C, and sodium silicate solution is mixed in to achieve a solid dry weight ratio of about 5% to 10% sodium silicate to calcium carbonate. Gaseous carbon dioxide is then added to adjust the pH, followed by the addition of zinc chloride to bring the pH to within the range of 7.5 to 8.0.
Career Highlights
Throughout his career, Vasant has worked with various companies, including Ecc International Limited and Ecc America Inc. His work has significantly impacted the production processes in the industry.
Collaborations
He has collaborated with notable coworkers such as Mohan N Badgujar and Vicente B Lasmarias, contributing to advancements in his field.
Conclusion
Vasant D Chapnerkar's innovative patents and career achievements highlight his important role in the development of calcium carbonate production methods. His contributions continue to influence the industry and inspire future innovations.