Method for the production of sulphate of potash granulates, sulphate of potash granulate obtained thereby, and use thereof

US10487018B2 · kind B2 · utility

Assignee

• K+S Kali GmbH · DE

Inventors

• Guido BAUCKE · Schenklengsfeld, DE
• Marcel Mueller-Goldkuhle · Essen, DE
• Armin Dietrich · Weissenberg, DE
• Torsten Rest · Heringen, DE
• Roland Keidel · Bad Bederkesa, DE
• Ludger Waldmann · Telgte, DE

Key dates

• Filing date: Sep 30, 2015
• Grant date: Nov 26, 2019
• Expiry date: Mar 7, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/11
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing sulphate of potash granulates, wherein 0.1 to 7.5 wt % of a sodium salt selected from among sodium chloride, sodium sulphate, sodium sulphate hydrates, sodium hydroxide and mixtures thereof are added to the sulphate of potash during the granulation process, the percentage by weight being in relation to the sulphate of potash used. In addition, 0.1 to 2.5 wt % of water are added prior to or during the granulation process. The invention also relates to the granulates obtained by said method as well as the use of sodium salts and glaserite and mixtures thereof for improving the mechanical properties of sulfate of potash granulates. The sulphate of potash granulates produced by the method of the invention have significantly greater bursting strength and significantly greater abrasion resistance than granulates known from the prior art.