发明名称 |
Lignosulfonate as granulation aid-particle hardener |
摘要 |
An improved process for more economically and effectively producing crystalline by-product ammonium sulfate (A/S) by granulating crystalline by-product A/S feedstock and recycle material together with an A/S-sulfuric acid-granulation aid-particle hardener solution and ammonia to bind the crystals together. Underlying the gist of the improvement concept is the identification of a low-cost readily available lignosulfonate by-product of the pulp and paper industry which, when used in predetermined and relatively small proportions, has now been discovered to be very satisfactory as a granulation aid-particle hardener for granulating such by-product ammonium sulfate crystals. Use of lignosulfonate instead of alum, as is currently practiced, reduces the manufacturing cost of granulating by-product ammonium sulfate by about as much as one dollar per short ton of product.
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申请公布号 |
US4743289(A) |
申请公布日期 |
1988.05.10 |
申请号 |
US19870083332 |
申请日期 |
1987.08.10 |
申请人 |
TENNESSEE VALLEY AUTHORITY |
发明人 |
MICKUS, J. C.;HARRISON, CECIL P.;TITTLE, CULLEN G. |
分类号 |
C05C3/00;(IPC1-7):C05D9/00 |
主分类号 |
C05C3/00 |
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