公开(公告)号：US4040860A

公开(公告)日：1977-08-09

申请号：US656040

申请日：1976-02-06

Applicant: Manfred Mansmann ,  Wolfgang Rambold

Inventor： Manfred Mansmann ,  Wolfgang Rambold

IPC: C01G37/033 ,  C01G37/02 ,  C09C1/34

CPC classification number: C01G37/02 ,  C01P2006/60

Abstract: In the production of chromium oxide green pigment by heating a substantially stoichiometrically equivalent mixture of sodium dichromate dihydrate and an ammonium salt selected from the group consisting of the sulfate and chloride, the improvement which comprises dry mixing sodium dichromate dihydrate having a particle size less than 2 mm with the ammonium salt having a particle size less than about 0.5 mm, heating the resulting mixture over a period of about 15 minutes to a pigment-forming temperature of about 800.degree. to 1100.degree. C, calcining the mixture at a temperature in that range, and separating the formed pigment from the salts. To the mixture prior to heating there may be added sodium hydroxide solution, boron compounds such as borax and/or organic modifiers such as sawdust which improve the color and tinting strength of the resulting pigment. The pigments are brighter, and of higher tinting strength than heretofore produced.

Abstract translation: 在通过加热基本上化学计量当量的重铬酸钠二水合物和选自硫酸盐和氯化物的铵盐的混合物来生产氧化铬绿色颜料的改进包括干混合粒度小于2的重铬酸钠二水合物 毫米，其中铵盐的粒度小于约0.5毫米，将所得混合物在约15分钟的时间内加热至约800至1100℃的颜料形成温度，在该范围内的温度下煅烧该混合物 ，并将形成的颜料与盐分离。 在加热之前，可以向混合物中加入氢氧化钠溶液，硼化合物等硼化合物和/或诸如锯末的有机改性剂，改善所得颜料的着色和着色强度。 颜料比以前生产的颜色更亮，颜色更强。

公开(公告)号：US3982955A

公开(公告)日：1976-09-28

申请号：US516831

申请日：1974-10-21

Applicant: Manfred Mansmann ,  Ludwig Schmidt

Inventor： Manfred Mansmann ,  Ludwig Schmidt

IPC: C04B35/622 ,  C08K7/10 ,  D01F9/08 ,  C01B33/26

CPC classification number: C08K7/10 ,  C04B35/62231 ,  C04B35/62236 ,  C04B35/6224 ,  C04B35/62245

Abstract: Aluminum oxide fibers of the approximate percent composition by weight:______________________________________ Al.sub.2 O.sub.3 61-98% preferably 76-96% SiO.sub.2 1-20% preferably 3-15% P.sub.2 O.sub.5 0-10% preferably 0-5% B.sub.2 O.sub.3 0-10% preferably 0-5% MgO 0-5% preferably 0-1% C 0.1-4% preferably 0.5-2.8% ______________________________________ The fibers are produced by dry spinning a solution containing a neutral or basic aluminum salt of a monobasic lower carboxylic acid, a hydrolyzed silicic acid ester or organoalkoxysilane and polyethylene oxide having a degree of polymerization of at least about 2,000. The product is then heat treated at a temperature between about 400.degree. and 1,800.degree.C. Phosphorus, boron and magnesium may also be present in the solution and end up in the fiber as oxides.

Abstract translation: 氧化铝纤维的组成重量百分比：} Al2O3 61-98％，优选76-96％} SiO2 1-20％优选3-15％} P2O5 0-10％优选0-5％} B2O3 0-10％ 优选0-5％} MgO 0-5％，优选0-1％} C 0.1-4％，优选0.5-2.8％}纤维通过将含有一元低级羧酸的中性或碱性铝盐的溶液 ，水解硅酸酯或有机烷氧基硅烷和聚合度至少约为2,000的聚环氧乙烷。 然后将产物在约400至1800℃的温度下进行热处理。磷，硼和镁也可以存在于溶液中，并以氧化物形式存在于纤维中。