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公开(公告)号：US3808149A
公开(公告)日：1974-04-30
申请号：US24494172
申请日：1972-04-17
摘要： THIS IS A SINGLE VIAL TEST KET, IN WHICH THERE IS ONLY ONE SOLUTION, FOR TESTING ACIDITY IN REFRIGERATION AND/OR AIR CONDITIONING OILS AND SIMILAR COMPOSITION. THE TESTING SOLUTION DESCRIBED HEREIN IS CHARACTERIZED BY CERTAIN COLORS. AFTER ONLY ONE BRIEF DIRECT MIXING STEP IN THE TESTING, THE DEGREE OF ACIDITY OF THE REFRIGERATION IOL IS EASILY DETECTED BY OBSERVING THE CHANGE IN COLOR OF THE MIXTURE. A METHOD FOR PRODUCING THE DESCRIBED TESTING SOLUTION IS TAUGHT HEREIN, AS WELL AS A PROCEDURE OF UTILIZNG THIS SOLUTION IN TESTING REFRIGERATION OILS.
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2.发明授权Groundwood pulp bleaching with sodium hydrosulfite in the presence of sodium salts of glucono-citrate complexes of polyaminoversenic acid 失效在含有羟基磷酸盐的葡萄糖 - 柠檬酸盐复合物的钠盐存在下，土壤浆液与钠水溶液漂白
公开(公告)号：US3830690A
公开(公告)日：1974-08-20
申请号：US27755572
申请日：1972-08-03
IPC分类号： D21C9/10
CPC分类号： D21C9/1042
摘要： The bleachability of sodium hydrosulfite on groundwood pump is significantly improved when the bleaching is conducted in the presence of either sodium salts of gluconocitrate complexes of polyaminoversenic acid or disilicate complexes of sodium salts of glucono-citrate complexes of polyaminoversenic acid, such bleaching process significantly reducing the eutrophication of waters into which waste effluents may flow.
摘要翻译： 当在聚氨基葡萄糖酸的葡萄糖酸盐络合物的钠盐或聚氨基葡萄糖酸的葡萄糖酸 - 柠檬酸盐络合物的钠盐的二硅酸盐配合物的存在下进行漂白时，显着提高了连二亚硫酸钠对沥青混合料的可漂白性，这种漂白过程显着地降低了 废水可能流入的水的富营养化。
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3.发明授权Method of recovering chemical values from a formate-sodium hydrosulfite reaction mixture 失效从酸性水溶液反应混合物中回收化学值的方法
公开(公告)号：US3718732A
公开(公告)日：1973-02-27
申请号：US3718732D
申请日：1971-01-13
发明人： WINSLOW C , PLENTOVICH J , KISE M
摘要： METHOD OF RECOVERING CHEMICAL VALUES FROM A WASTE EFFLUENT SUCH AS A FORMATE-SODIUM HYDROSULFITE REACTION MEDIUM AFTER REMOVAL OF THE SODIUM HYDROSULFITE. THE METHOD ELIMINATES FROM THE REACTION MEDIUM RESIDUE THOSE REDUCING AGENTS WHICH CREATE A CHEMICAL OXYGEN DEMAND IN ANY BODY OF WATER INTO WHICH THEY MIGHT BE DISCHARGED. THE METHOD INCLUDES: INTRODUCING SULFURIC ACID INTO THE REACTION MEDIUM; BOILING TO EXPEL SULFUR DIOXIDE, CONTINUING BOILING AND DISTILLING WITH REFLUX OF METHYL ALCOHOL AND METHYL FORMATE; FILTERING THE REACTION MEDIUM RESIDUE TO REMOVE SULFUR; AND SEPARATING THE RESIDUE SALT FROM WATER AFTER REMOVING OF SULFUR.
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公开(公告)号：US3804944A
公开(公告)日：1974-04-16
申请号：US25576972
申请日：1972-05-22
IPC分类号： C01B17/66
CPC分类号： C01B17/665
摘要： SODIUM DITHIONITE IN SOLUTION IS WIDELY USED IN BLEACHING AND VAT DYEING OF TEXTILES. UNFORTUNATELY, HOWEVER, LOSSES OCCUR NOT ONLY THROUGH DECOMPOSITION DURING DISSOLVING OF THE SALT IN QUESTION, BUT ALSO DURING STORAGE OF THE SOLUTION. IN THE PRESENT METHOD AND REACTION PRODUCT, ONE AVOIDS DECOMPOSITION AND EFFECTIVELY STABILIZES VARIOUOUS CONCENTRATION LEVELS OF THE DITHIONITE SOLUTION WITH CAUSTIC SODA ADDED AT 1.4% TO 20% BY WEIGHT OF THE SODIUM DITHIONITE PRESENT, THE ADDITION BEING MADE UNDER CONTROLLED CONDITIONS. FOR EXAMPLE, WHILE MINIMIZING AIR EXPOSURE, THE PH IS GENERALLY MAINTAINED ABOVE 9 AND EXCESSIVE CAUSTIC SODA ADDITION IS AVOIDED. ALSO, TEMPERATURE IS CONTROLLED (TO APPROXIMATELY 50*F.) FOR BEST EFFECT.
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公开(公告)号：US3773679A
公开(公告)日：1973-11-20
申请号：US3773679D
申请日：1972-01-14
IPC分类号： C01B17/66
CPC分类号： C01B17/665
摘要： Sodium dithionite in solution is widely used in bleaching and vat dyeing of textiles. Unfortunately, however, losses occur not only through decomposition during dissolving of the salt in question, but also during storage of the solution. To avoid decomposition of such solutions, the presence of sulfite ion is introduced by sodium sulfite, or a comparable variant compound preferably with a pH adjustment under either aerobic or anaerobic conditions. The effect hereof in protecting the sodium dithionite against aerobic decomposition is at 7 percent to 45 percent of the decomposition rate for unprotected systems. With air exclusion, the rate in the protected system is at 2 percent to 71 percent that for the unprotected system. As indicated, mixtures of sodium sulfite or sodium bicarbonate with sodium bisulfite (anhydrous) have likewise been found effective as a stabilizing media for the sodium dithionite solution, all by virtue of the sulfite ion concentration increase therein.
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公开(公告)号：US3794738A
公开(公告)日：1974-02-26
申请号：US3794738D
申请日：1972-07-26
CPC分类号： C01B17/665 , D06L4/30
摘要： To retard self-ignition of commercial grades of sodium dithionite when contacted with moisture and/or water, small but effective amounts of low concentration alkali metal and ammonium salts of diglycolic acid are added, said additive salts being beneficial to bleaching processes in which sodium dithionite may be used, while at the same time avoiding eutrophication of lakes and streams into which the bleaching effluent may ultimately flow.
摘要翻译： 为了阻止商业级别的连二亚硫酸钠与水分和/或水接触时的自燃，加入少量但有效量的低浓度碱金属和二甘醇酸铵盐，所述添加剂盐有利于漂白方法，其中连二亚硫酸钠 可以同时避免漂白废水最终流入的湖泊和溪流的富营养化。
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