公开(公告)号：US09062161B2

公开(公告)日：2015-06-23

申请号：US14356656

申请日：2011-11-08

申请人： Huiquan Li ,  Haitao Liu ,  Jiaqiang Chen ,  Kaihua Zhang ,  Yan Cao

发明人： Huiquan Li ,  Haitao Liu ,  Jiaqiang Chen ,  Kaihua Zhang ,  Yan Cao

IPC分类号： C08G69/44 ,  C08G71/04 ,  C08G12/04 ,  C07C269/06 ,  C08L77/00

CPC分类号： C08G71/04 ,  C07C269/06 ,  C08G12/04 ,  Y02P20/582 ,  C07C271/28

摘要： A method for preparing polymethylene polyphenyl polycarbamate is provided. The method includes dissolving phenylcarbamate in a water-immiscible organic solvent to form a solution A, formulating an aqueous acid catalyst solution to form a solution B, forming a reaction system comprising an organic phase and an aqueous phase by firstly adding a methylating reagent to the solution B and then mixing the solution A and the solution B, wherein the organic phase comprises phenylcarbamate and the aqueous phase comprises the acid catalyst and the methylating reagent. The method further includes reacting the reaction system under stirring at a reaction temperature of 30° C. to 200° C. and a reaction pressure of 0.05 MPa to 5 MPa to produce a polymethylene polyphenyl polycarbamate product mixture dissolved in the organic phase, and separating the polymethylene polyphenyl polycarbamate product mixture by allowing the organic phase and the aqueous phase to stand still and stratify.

摘要翻译： 提供了聚亚甲基多苯基聚氨酯的制备方法。 该方法包括将苯基氨基甲酸铵溶解在与水不混溶的有机溶剂中以形成溶液A，配制酸性催化剂水溶液以形成溶液B，形成包含有机相和水相的反应体系，首先将甲基化试剂加入到 溶液B，然后混合溶液A和溶液B，其中有机相包含苯基氨基甲酸盐，水相包含酸催化剂和甲基化试剂。 该方法还包括在30℃至200℃的反应温度和0.05MPa至5MPa的反应压力下在搅拌下使反应体系反应，生成溶解在有机相中的聚亚甲基多苯基聚氨基甲酸酯产物混合物，分离 通过使有机相和水相静置并分层，形成多亚甲基聚苯基聚氨酯。

公开(公告)号：US20140316100A1

公开(公告)日：2014-10-23

申请号：US14356656

申请日：2011-11-08

申请人： Huiquan Li ,  Haitao Liu ,  Jiaqiang Chen ,  Kaihua Zhang ,  Yan Cao

发明人： Huiquan Li ,  Haitao Liu ,  Jiaqiang Chen ,  Kaihua Zhang ,  Yan Cao

IPC分类号： C08G71/04

CPC分类号： C08G71/04 ,  C07C269/06 ,  C08G12/04 ,  Y02P20/582 ,  C07C271/28

摘要： A method for preparing polymethylene polyphenyl polycarbamate is provided, which is carried out through the condensation of phenylcarbamate with a methylating reagent under the catalyzation of a phase transfer acid catalyst. The method comprises: dissolving phenylcarbamate in a water-immiscible organic solvent to form a solution A; formulating an aqueous acid catalyst solution to fibrin a solution B; forming a reaction system comprising an organic phase and an aqueous phase by firstly adding a methylating reagent to the solution B and then mixing the solution A and the solution B or by adding the methylating reagent at the same time of mixing the solution A and the solution B or after mixing the solution A and the solution B; reacting the reaction system under stirring at a reaction temperature of 30° C. to 200° C. and a reaction pressure of 0.05 MPa to 5 MPa; and separating a polymethylene polyphenyl polycarbamate product mixture by allowing the organic phase and the aqueous phase to stand still and stratify. The method can realize the high selectivity and yield of the product and is easy to separate the product.

摘要翻译： 提供了一种制备聚亚甲基多苯基聚氨基甲酸酯的方法，其通过在相转移酸催化剂的催化下通过苯基氨基甲酸酯与甲基化试剂的缩合进行。 该方法包括：将苯基氨基甲酸铵溶解在与水不混溶的有机溶剂中以形成溶液A; 将酸性催化剂水溶液配制成纤维蛋白溶液B; 通过首先向溶液B中加入甲基化试剂形成包含有机相和水相的反应体系，然后混合溶液A和溶液B，或者在将溶液A和溶液混合的同时加入甲基化试剂 B或混合溶液A和溶液B后; 在30℃至200℃的反应温度和0.05MPa至5MPa的反应压力下，在搅拌下使反应体系反应; 并通过使有机相和水相静置并分层来分离多亚甲基聚苯基聚氨基甲酸酯产物混合物。 该方法可以实现产品的高选择性和收率，易于分离产品。

公开(公告)号：US07968066B2

公开(公告)日：2011-06-28

申请号：US10549594

申请日：2003-03-19

申请人： Zuohu Li ,  Yi Zhang ,  Shili Zheng ,  Tao Qi ,  Huiquan Li ,  Hongbin Xu ,  Zhikuan Wang

发明人： Zuohu Li ,  Yi Zhang ,  Shili Zheng ,  Tao Qi ,  Huiquan Li ,  Hongbin Xu ,  Zhikuan Wang

IPC分类号： C01G37/14

CPC分类号： C01G37/14

摘要： This invention relates to a method for producing chromates, especially for producing alkali metal chromates. The method comprises following steps: the obtaining of a mixture of alkali metal hydroxide, alkali metal chromate, and ferrous residue after the reaction of chromite ore with an oxidant in the reactor in the presence of molten salt or in aqueous solution of alkali metal hydroxide, the obtaining of a leaching slurry by leaching the reaction products with aqueous solution of alkali metal hydroxide, the separating of the primary chromate product from the leaching slurry, the obtaining of pure chromate crystal by purifying the primary chromate product. Both the primary chromate product and the pure chromate crystal can be used as the raw materials to manufacture other chromium compounds. Compared with the currently-used roasting method, the method has the advantages of decreasing the reaction temperature by about 700° C., of improving the chromium recovery rate up to nearly 100%, of minimizing the amount of the ferrous residue by not adding calcium-containing auxiliaries, and of completely eliminating the disposal problem of the chromium-containing residue and the environmental pollution due to the addition of calcium-containing auxiliaries, by using ferrous residue as the raw materials for other industries after extraction of magnesium.

摘要翻译： 本发明涉及生产铬酸盐的方法，特别是生产碱金属铬酸盐。 该方法包括以下步骤：在熔融盐存在下或在碱金属氢氧化物的水溶液中，在铬酸铁矿与氧化剂反应后，获得碱金属氢氧化物，碱金属铬酸盐和亚铁残留物的混合物， 通过将碱金属氢氧化物水溶液浸出反应产物，从浸出浆中分离出一次铬酸盐产物，通过纯化一次铬酸盐产物得到纯的铬酸盐晶体，从而获得浸出浆料。 主要的铬酸盐产物和纯铬酸盐晶体都可以用作制造其他铬化合物的原料。 与目前使用的焙烧方法相比，该方法具有将反应温度降低约700℃，将铬回收率提高至近100％的优点，通过不添加钙来最小化亚铁残留量 并且完全消除了含铬残渣的处理问题，以及由于添加含钙助剂而导致的环境污染，在提取镁后，以铁渣作为其他工业的原料。

公开(公告)号：US20060188419A1

公开(公告)日：2006-08-24

申请号：US10549594

申请日：2003-03-19

申请人： Zhikuan Wang ,  Hongbin Xu ,  Huiquan Li ,  Tao Qi ,  Shili Zheng

发明人： Zhikuan Wang ,  Hongbin Xu ,  Huiquan Li ,  Tao Qi ,  Shili Zheng

IPC分类号： C22B34/30

CPC分类号： C01G37/14

摘要： This invention relates to a method for producing chromates, especially for producing alkali metal chromates. The method comprises following steps: the obtaining of a mixture of alkali metal hydroxide, alkali metal chromate, and ferrous residue after the reaction of chromite ore with an oxidant in the reactor in the presence of molten salt or in aqueous solution of alkali metal hydroxide, the obtaining of a leaching slurry by leaching the reaction products with aqueous solution of alkali metal hydroxide, the separating of the primary chromate product from the leaching slurry, the obtaining of pure chromate crystal by purifying the primary chromate product. Both the primary chromate product and the pure chromate crystal can be used as the raw materials to manufacture other chromium compounds. Compared with the currently-used roasting method, the method has the advantages of decreasing the reaction temperature by about 700° C., of improving the chromium recovery rate up to nearly 100%, of minimizing the amount of the ferrous residue by not adding calcium-containing auxiliaries, and of completely eliminating the disposal problem of the chromium-containing residue and the environmental pollution due to the addition of calcium-containing auxiliaries, by using ferrous residue as the raw materials for other industries after extraction of magnesium.

摘要翻译： 本发明涉及生产铬酸盐的方法，特别是生产碱金属铬酸盐。 该方法包括以下步骤：在熔融盐存在下或在碱金属氢氧化物的水溶液中，在铬酸铁矿与氧化剂反应后，获得碱金属氢氧化物，碱金属铬酸盐和亚铁残留物的混合物， 通过将碱金属氢氧化物水溶液浸出反应产物，从浸出浆中分离出一次铬酸盐产物，通过纯化一次铬酸盐产物得到纯的铬酸盐晶体，从而获得浸出浆料。 主要的铬酸盐产物和纯铬酸盐晶体都可以用作制造其他铬化合物的原料。 与目前使用的焙烧方法相比，该方法具有将反应温度降低约700℃，将铬回收率提高至近100％的优点，通过不添加钙来最小化亚铁残留量 并且完全消除了含铬残渣的处理问题，以及由于添加含钙助剂而导致的环境污染，在提取镁后，以铁渣作为其他工业的原料。