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公开(公告)号：US3706829A
公开(公告)日：1972-12-19
申请号：US3706829D
申请日：1970-11-19
申请人： DOW UNQUINESA SA
IPC分类号： C01G23/053 , C01G23/06
CPC分类号： C01G23/0534 , C01P2006/60 , Y10T436/12
摘要： THE HYDROLYSIS OF TITANIUM SULFATE SOLUTIONS IS PERFORMED AND CONTROLLED BY HEATING A SEEDED TITANIUM SULFATE SOLUTION WITH AGITATION WHILE SIMULTANEOUSLY MEASURING THE REFLECTANCE OF THE RESULTING SUSPENSION, UNTIL A CRITICAL POINT IS ATTAINED AS INDICATED BY A SUBSTANTIAL CHANGE IN THE RATE OF REFLECTANCE PER UNIT OF HYDROLYSIS TIME, ALLOWING THE SOLUTION TO REMIAN QUIESCENT FOR FROM 5 TO 60 MINUTES, THEN RESUMING THE HEATING OF THE SOLUTION UNTIL THE HYDROLYSIS PRODUCES THE DESIRED YIELD OF TITANIUM HYDRATE. THE MEASUREMENT OF REFLECTANCE MAY BE
MADE BY PHOTOELECTRIC MEANS, AND THE POINT OF INFLECTION OF THE REFLECTANCE CURVE OR ITS FIRST OR SECOND DERIVATIVE WITH RESPECT TO TIME MAY BE USED TO CONTROL THE HYDROLYSIS PROCESS.-
公开(公告)号：US3617217A
公开(公告)日：1971-11-02
申请号：US3617217D
申请日：1969-09-22
申请人： NAT LEAD CO
IPC分类号： C01G23/053 , C09C1/36 , C01G23/04 , C01G23/06 , C01G23/08
CPC分类号： C09C1/363 , C01G23/0534 , C01P2006/60
摘要： This invention relates in general to a process for preparing a high quality titanium dioxide pigment in which the titanium dioxide is in the anatase crystal form. The process comprises hydrolyzing in a particular manner the titanium values from a titanium sulfate-ferrous sulfate solution in which the concentration of titanium is from 80 to 180 g.p.l. calculated as TiO2 and treating and calcining the hydrate so formed to produce a high grade anatase TiO2 pigment. Using the hydrolysis process of the instant invention, a high grade anatase titanium dioxide pigment may be produced from a titanium sulfate-ferrous sulfate solution without utilizing the conventional crystallization step for removing most of the iron values nor the concentration step for increasing the titanium content in the liquor to at least 200 g.p.l. TiO2.
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公开(公告)号：US3615163A
公开(公告)日：1971-10-26
申请号：US3615163D
申请日：1969-12-15
申请人： PPG INDUSTRIES INC
发明人： BRZOZOWSKI STANLEY F
CPC分类号： C01G23/07 , B01D53/68 , C22B34/1231 , Y02P10/23
摘要： Waste gas from the chlorination of titaniferous ores is treated with steam before being vented and burned.
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公开(公告)号：US3475123A
公开(公告)日：1969-10-28
申请号：US3475123D
申请日：1967-02-24
申请人： PPG INDUSTRIES INC
CPC分类号： C01B13/28 , C01B33/183 , C01G23/07 , C01P2002/54 , C01P2004/62 , C01P2006/60 , C01P2006/80 , H05H1/40
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公开(公告)号：US3862297A
公开(公告)日：1975-01-21
申请号：US9754170
申请日：1970-12-14
CPC分类号： C09C1/3692 , C01G23/0534 , C01G23/08 , C01P2002/52 , C01P2004/03 , C01P2006/62 , C09C3/063 , C09C3/08
摘要： The process comprises hydrolysing a solution of titanium sulphate, washing the titanium dioxide hydrolysate, and then calcining the hydrolysate at a temperature from 750 to 1000*C. to yield titanium dioxide pigment having desirable properties in terms of brightness, opacity, and/or texture. A rutile-promoting seed is incorporated with the titanium sulphate solution and/or with the hydrolysate. In the process, the pH of the wet hydrolysate is in the range of from 6 to 10 immediately before calcination, and there is present in the hydrolysate immediately before calcination an ammonium compound that will be expelled, together with any decomposition products thereof, during calcination; a treating agent or agents selected from beryllium, aluminium, magnesium, zinc and compounds thereof, and a treating agent or agents selected from sodium potassium, rubidium, caesium, and compounds thereof, with the proviso that lithium and/or a lithium compound may be substituted for any or all of the agent or agents selected from the first-mentioned and/or second-mentioned group. The total quantity of the ammonium compound is at least 0.7 percent (calculated as ammonium sulphate); the total quantity of agents from the first-mentioned group is from 0.02 to 0.50 percent (calculated as the metal oxide or oxides); and the total quantity of agents from the secondmentioned group is from 0.05 to 1.0 percent (calculated as the alkali metal oxide or oxides). All the percentages are by weight and are based on the weight of titanium dioxide. The ammonium compound and the treating agent or agents may be incorporated with the hydrolysate in any order. Conveniently, any necessary pH adjustment is effected at least in part by using an alkaline ammonium compound.
摘要翻译： 该方法包括水解硫酸钛溶液，洗涤二氧化钛水解物，然后在750〜1000℃的温度下煅烧水解产物，得到在亮度，不透明度和/或质地方面具有期望性能的二氧化钛颜料 。 将金红石促进种子与硫酸钛溶液和/或与水解产物结合。 在此过程中，湿式水解产物的pH在煅烧前立即在6至10℃范围内，在煅烧之前立即在水解产物中存在待煅烧的铵化合物及其任何分解产物在煅烧过程中 ; 选自铍，铝，镁，锌及其化合物的处理剂或试剂，以及选自钠钾，铷，铯及其化合物的处理剂或试剂，条件是锂和/或锂化合物可以是 代替选自前述和/或第二组的任何或所有试剂或试剂。 铵化合物的总量至少为0.7％（以硫酸铵计）; 来自前述组的试剂的总量为0.02〜0.50％（以金属氧化物计算）; 并且来自第二组的试剂的总量为0.05〜1.0％（以碱金属氧化物计算）。 所有的百分数均以重量计，基于二氧化钛的重量。 铵化合物和处理剂或试剂可以以任何顺序与水解产物结合。 方便地，至少部分地通过使用碱性铵化合物进行任何必要的pH调节。
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公开(公告)号：US3677716A
公开(公告)日：1972-07-18
申请号：US3677716D
申请日：1970-11-18
发明人： WEHER CARL L , WOLK RONALD H , CHERVENAK MICHAEL C
CPC分类号： B01J8/22 , B01D19/0042 , C10G49/12 , Y10S423/16
摘要： APPARATUS FOR IMPROVED SEPARATION OF LIQUIDS, GASES AND PARTICULATE SOLID MATERIALS IN A LIQUID-GAS CONTACTING PROCESS WHEREIN A LIQUID FEED AND GAS USUALLY HYDROGEN ARE PASSED UPWARDLY THROUGH A BED COMPOSED OF A PARTICULATE CONTACT AGENT, THE VELOCITY OF THE GAS AND THE LIQUID BEING SUCH THAT THE PARTICLES ARE PUT IN A STATE OF RANDOM MOTION AND THE VOLUME OF THE BED IS EXPANDED OVER ITS STATIC VOLUME AND WHEREIN AN AREA OF HIGH LIQUID GAS AND LIQUID TURBULENCE AND MIXING IS CREATED AND WHEREIN LIQUID EFFUENT AND GASEOUS EFFUENTS ARE REMOVED FROM THE CONTACT ZONE. THE METHOD CONSISTS OF EFFECTING ESSENTIALLY COMPLETE DISENGAGEMENT OF THE GAS FROM THE MIXTURE OF PARTICULATE SOLIDS AND LIQUID. THE GAS-FREE LIQUIDSOLID MIXTURE IS THEN INTRODUCED TO A ZONE OF RELATIVELY LOW TURBULENCE AND LIQUID IS THEN REMOVED FROM THIS ZONE AT A RATE WHOSE LINEAR VELOCITY IS LESS THAN THE SETTLING VELOCITY OF THE SOLID, THEREBY ALLOWING SUBSTANTIAL SETTLING OF THE SOLID AND RESULTING IN THE REMOVAL OF A CLARIFIED LIQUID. THE DISENGAGED GASEOUS EFFLUENT MAY THEN BE REMOVED SEPARATELY OR RECOMBINED AND REMOVED WITH THE LIQUID EFFLUENT. APPARATUS FOR EFFICIENTLY CARRYING OUT THIS PROCESS ARE DESCRIBED.
D R A W I N G-
公开(公告)号：US3615204A
公开(公告)日：1971-10-26
申请号：US3615204D
申请日：1969-09-22
申请人： NL INDUSTRIES INC
发明人： LIBERA JOHN J , PUETZ ECKARD J
IPC分类号： C01G23/053 , C09C1/36 , C01G23/06 , C01G23/08
CPC分类号： C01G23/0534 , C01P2006/60 , C09C1/363
摘要： This invention relates in general to a process for preparing a high-quality titanium dioxide pigment in which the titanium dioxide is in the anatase crystal form. The process comprises hydrolyzing in a particular manner the titanium values from a titanium sulfate-ferrous sulfate solution in which the concentration of titanium is from 80 to 180 g.p.l. TiO2 and the FeSO4/TiO2 ratio is from 2.20 to 2.75 and treating and calcining the hydrate so formed to produce a high-grade anatase TiO2 pigment. Using the hydrolysis process of the instant invention, a high-grade anatase titanium dioxide pigment may be produced from a solution which does not require the conventional crystallization step to remove most of the iron values and the concentration step to increase the titanium content in the liquor to at least 200 g.p.l. TiO2.
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8.发明授权
公开(公告)号：US3549322A
公开(公告)日：1970-12-22
申请号：US3549322D
申请日：1969-02-03
申请人： TITAN GMBH
发明人： KLEIN EDGAR , KULLING ACHIM , STEINHAUSEN HELMUT
CPC分类号： C09C1/3692 , C01G23/0538 , C01P2004/10 , C01P2004/54 , C01P2006/60 , C09C1/3607 , C09C3/043 , C09C3/06
摘要： 1,254,729. Titanium dioxide. TITANG.m.b.H. 10 Feb:, 1969 [17 Feb., 1968], No. 7177/69. Heading C1N. 'Needle-shaped TiO 2 particles, or star-shaped agglomerates thereof, are made by (1) heating to 80-100‹ C. an HCl solution of titanium chloride (130-250. g. TiO 2 /l.) in which the molar ratio HCl not bonded to Fe : TiO 2 is 2-5 :1; (2) mixing this solution with a seed solution, heated to 70-100‹.C. and having a Ti content equivalent to 5-30 g. TiO 2 /l., the amount of seed being 1- 4% by wt. of the total amount of TiO 2 ; (3) heating the mixture at about 105‹ C. for 0À5-3 hours to hydrolyse the titanium chloride solution; (4) separating needle-shaped TiO 2 hydrate precipitate and calcining it at 800-900‹ C in presence of a growth-inhibiting compound of one or more of K, Rb, Cs, Ca, Sr, Ba, Al, S, P and Si; (5) grinding the calcined product under such mild conditions that the needles -are not destroyed. The initial titanium chloride solution may be one obtained by digestion of an ore with cone. HCl arid which has been freed of part of the iron initially present by crystallization. In examples, calcination is effected in presence of (1) 0À28% K 2 O and 0À5% SiO 2 ; (2) 0À28% K 2 O ; (3) 0À28% K 2 O and 0À6% P 2 O 5 . The initial titanium chloride solution, derived from ilmenite, contained Fe and Mg.
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公开(公告)号：US3475124A
公开(公告)日：1969-10-28
申请号：US73120668
申请日：1968-05-22
申请人： PPG INDUSTRIES INC
CPC分类号： C01B35/06 , C01B13/30 , C01B25/12 , C01B33/183 , C01B35/10 , C01F7/02 , C01G23/07 , C01G23/075
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10.发明授权
公开(公告)号：US4276274A
公开(公告)日：1981-06-30
申请号：US708776
申请日：1976-07-26
申请人： Emil Heckel
发明人： Emil Heckel
IPC分类号： C01B33/12 , C01B13/24 , C01B13/30 , C01B33/16 , C01F7/30 , C01G23/07 , C01B33/18 , C01F7/02 , C01G23/06
CPC分类号： C01B13/30 , C01F7/302 , C01G23/075 , C01P2006/12
摘要： In an improved process for the production of a finely divided oxide of a metal, silicon or mixtures thereof by the hydrolytic conversion of a corresponding volatile chloride of said metal, silicon or mixtures thereof in a flame; wherein said volatile chloride or said mixture of volatile chlorides in admixture with a combustible hydrogen-containing gas and air or oxygen are fed to a flame emitting from a burner into a reaction chamber to thereby form an oxide aerosol in waste gases from said burner; cooling said oxide and said waste gases; and separating said oxide from said waste gases; wherein the improvement comprises maintaining said waste gases substantially free of chlorine by reducing chlorine that forms during said conversion in said flame with hydrogen while cooling said waste gas below the temperature at which hydrogen and oxygen react in said waste gas.
摘要翻译： 在通过在火焰中水解转化所述金属，硅或其混合物的相应的挥发性氯化物来制备金属，硅或其混合物的细碎氧化物的改进方法中， 其中所述挥发性氯化物或所述挥发性氯化物混合物与可燃的含氢气体和空气或氧气的混合物被供给到从燃烧器发射到反应室中的火焰，从而在来自所述燃烧器的废气中形成氧化物气溶胶; 冷却所述氧化物和所述废气; 并从所述废气中分离出所述氧化物; 其中所述改进包括通过在氢气和氧气在所述废气中反应的温度下将所述废气冷却到低于在所述火焰中的所述转化期间形成的氯来保持所述废气基本上不含氯。
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