| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 04.99 |
| PATENT ASSIGNEE | Solv-Ex Corp (Albuquerque; N.Mex) |
| PATENT CLAIMS |
M2SO4 3Al2O3 4SO3+xH2O; M = K,Na & x = 4-12 mfg method - Inputting H2SO4 into crystallizer - Inputting alkali metal sulfate into crystallizer (I) - Inputting Al sulfate in (I) - Mixing above in (I) - Holding mixt in (I) for time to form Al2(SO4)3 M2SO4+24H2O (II) - Drawing off fluid flow contg (II) & transferring into pigment reactor (III) & subjecting to 200C & 120-350 pounds/square inch pressure to form title pigment - Transferring fluid flow from (III) to filter unit - Filtering out pigment & recycling mother liquor to (I) |
| PATENT PHOTOCOPY | Available on request |
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