Obtaining process of additivated sodic bentonite for use in composition of green sand for molding of cast parts and resulting product
AssigneeCoque Do Sul Do Brasil Ltda
InventorArnaldo Romanus
Life of this patent
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Abstract
Composition and process of a composition of additivated sodic bentonite through the addition of dextrin and sugar (saccharose), preferably refined sugar, or starch and sugar (saccharose), preferably refined sugar, in specific quantities during the process of calcic bentonite activation by means of incorporation of sodium carbonate into the in natura ore, belonging to the field of chemical industry for use in the composition of green sand for cast molding, offering a wide range of advantages in comparison with the existing formulas.
Claims12
A bentonite composition containing additives for use with green sand for molding of car parts, comprising:
- natural sodium bentonite, and
- an additive selected from the group consisting of:
- dextrin and sugar, and starch and sugar.
A process for obtaining a sodium bentonite composition containing additives for use with green sand for molding of car parts, the process comprising:
- (a) providing natural calcium bentonite;
- (b) incorporating sodium carbonate into the natural calcium bentonite, transforming natural calcium bentonite into natural sodium bentonite;
- (c) incorporating an additive selected from the group consisting of dextrin and sugar, and starch and sugar into the natural sodium bentonite;
- (d) obtaining the sodium bentonite composition containing additives.
Dependencies are inferred from the claim text.