FIELD: chemical industry. SUBSTANCE: aqueous formaldehyde is reacted with calcium hydroxide at 60-70 C in the presence of boric acid or borax; the calcium hydroxide to acid weight ratio is 1:0.09. The process is carried out till formaldehyde is completely eliminated. Calcium hydroxide is preferable metallurgical lime in the form of lime milk. EFFECT: more efficient preparation process. 2 cl, 1 tbl
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METHOD OF PRODUCING CALCIUM FORMIATE | 0 |
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METHOD OF PREPARATION OF CONCRETE MIX | 0 |
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BINDER | 2014 |
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Authors
Dates
1996-03-27—Published
1992-10-29—Filed