Preparation of a Carbonate-Free Complex Calcium Aluminate
نویسنده
چکیده
Compounds found in portland cement are diffi cul t to prepare completely free of carbon diox ide. The difficu lty is further intensified in t he case of calcium aluminate monosulfate by t he instability of t he compound in t he course of its precipi tation from solut ion a nd t he consequent need fo r prepa ring it wi thi~l a limi ted t ime. The co mpound has been preparcd 111 a large qua nt ity, free of carbon dIOxide, by uSing a closed-system precipi tatio n a nd fi ltrat ion assembly, in w~lich rapid movement of t he reagent solu t ions and mother liqu or is achi eved by t he maJllpUlatlOll of trapped pockets of prev iously prepa red CO2-free a il' . The prec ipi tate is condi tioned and p ackaged in a glove box i n which a COTfree atmosphere is maintained. Techniques arc descr ibed in deta il.
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