专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4793906A Electrochemical process for producing hydrosulfite solutions 失效
标题翻译：生产连二亚硫酸盐溶液的电化学工艺
公开(公告)号：US4793906A
公开(公告)日：1988-12-27
申请号：US892518
申请日：1986-08-04
申请人： Roger E. Bolick, II , David W. Cawlfield , Jimmy M. French
发明人： Roger E. Bolick, II , David W. Cawlfield , Jimmy M. French
IPC分类号： C25D1/00 , C25B1/00 , C25B1/14 , C25B9/00 , C25B9/08
CPC分类号： C25B1/14
摘要： A process for the electrochemical production of an alkali metal hydrosulfite by the reduction of an alkali metal bisulfite component of a circulated aqueous catholyte solution in an electrolytic membrane cell having a cathode compartment, a porous cathode in the cathode compartment, an anode compartment and a cation exchange membrane separating the cathode compartment from the anode compartment, which comprises passing at least 30 percent by volume of the aqueous catholyte through the pores of the porous cathode in the cathode compartment.High purity solutions of alkali metal hydrosulfites, such as sodium hydrosulfite having concentrations of at least 120 grams per liter, are produced at current densities in the range of 1.0 to 4.5 KA/m.sup.2 and at reduced cell voltages. The thiosulfate impurity concentration is from 0 to about 10 percent by weight of the hydrosulfite.

2. 发明授权

US4992147A Electrochemical process for producing hydrosulfite solutions 失效
标题翻译：生产连二亚硫酸盐溶液的电化学工艺
公开(公告)号：US4992147A
公开(公告)日：1991-02-12
申请号：US190630
申请日：1988-05-05
申请人： Roger E. Bolick, II , David W. Cawlfield , Jimmy M. French
发明人： Roger E. Bolick, II , David W. Cawlfield , Jimmy M. French
IPC分类号： C25B1/14
CPC分类号： C25B1/14
摘要： A process for electrolyzing an aqueous catholyte solution comprising an alkali meal bisulfite to produce an alkali metal hydrosulfite in an electrolytic membrane cell having a cation exchange membrane separating a cathode compartment from an anode compartment, a porous cathode having a face adjacent the membrane, a back opposite, and a porous structure conjoining the face and the back, and a cathode-membrane gap between the porous cathode and the cation exchange membrane. The process comprises directing at least 50 percent of the volume of the aqueous alkali metal bisulfite catholyte through the porous cathode and transverse to the face and back of the cathode, the porous cathode having a ratio of total surface area to the projected surface area of at least about 30:1.High purity solutions of alkali metal hydrosulfites, such as sodium hydrosulfite having concentrations of at least 120 grams per liter, are produced at current densities in the range of 1.0 to 4.5 KA/m.sup.2 and at reduced cell voltages. The thiosulfate impurity concentration is from 0 to about 10 percent by weight of the hydrosulfite.
摘要翻译：电解含碱金属亚硫酸氢盐的含水阴极电解液的方法，在具有将阳极室与阳极室隔离的阳离子交换膜的电解膜电池中制造碱金属连二亚硫酸盐，具有邻近膜的表面的多孔阴极，背面和与表面和背面结合的多孔结构以及多孔阴极和阳离子交换膜之间的阴极 - 膜间隙。该方法包括将至少50％的碱金属亚硫酸氢盐水溶液的体积引导通过多孔阴极并横向于阴极的表面和背面，多孔阴极具有总表面积与投影表面积的比值至少约30：1。碱性金属连二亚硫酸盐的高纯度溶液，例如浓度为至少120克/升的连二亚硫酸钠，以1.0-4.5KA / m 2的电流密度和电池电压降低产生。硫代硫酸盐杂质浓度为连二亚硫酸盐的0至约10重量％。

3. 发明授权

US5006327A Alkali metal hydrosulfite solutions 失效
标题翻译：碱金属连二亚硫酸盐溶液
公开(公告)号：US5006327A
公开(公告)日：1991-04-09
申请号：US380923
申请日：1989-07-18
申请人： Roger E. Bolick, II , Jimmy M. French
发明人： Roger E. Bolick, II , Jimmy M. French
IPC分类号： C01B17/66
CPC分类号： C01B17/665
摘要： An aqueous solution comprising alkali metal hydrosulfite and hydroxide ions in an amount to provide a residual alkalinity of at least 0.25 moles per liter results in the decomposition of thiosulfate ions present and inhibits their formation during storage. These solutions can be used, for example, in the bleaching of mechanical pulp.
摘要翻译：包含碱金属连二亚硫酸盐和氢氧根离子的水溶液，其量提供至少0.25摩尔/升的残余碱度导致存在硫代硫酸根离子的分解并且在储存期间抑制它们的形成。这些溶液可用于例如机械纸浆的漂白。

4. 发明授权

US4892636A Modular electrolytic cell and processing apparatus 失效
标题翻译：模块化电解槽和加工设备
公开(公告)号：US4892636A
公开(公告)日：1990-01-09
申请号：US207798
申请日：1988-06-17
申请人： Roger E. Bolick, II , David W. Cawlfield , Kenneth E. Woodard, Jr.
发明人： Roger E. Bolick, II , David W. Cawlfield , Kenneth E. Woodard, Jr.
IPC分类号： C25B9/00 , C25B15/00
CPC分类号： C25B15/00 , C25B9/00
摘要： An easily transportable electrolytic cell and associated processing apparatus is modularly constructed and supported in modular support sections that are easily separated and loaded onto transport vehicles for transport to distant remote sites where the electrolytic cell module and the processing apparatus module are reassembled and the apparatus is put into operation where the product chemical produced by the electrolytic cell is utilized.
摘要翻译：一个易于运输的电解池和相关的加工设备被模块化地构造和支撑在模块化的支撑部分中，这些部件容易地分离并装载到运输车辆上，以便运送到遥控的远处，重新装配电解槽模块和处理装置模块，进入使用电解池生产的产品化学品的操作。

5. 发明授权

US4810483A Process for producing anhydrous alkali metal hydrosulfites 失效
标题翻译：无水碱金属连二亚硫酸盐的制备方法
公开(公告)号：US4810483A
公开(公告)日：1989-03-07
申请号：US56040
申请日：1987-06-01
申请人： David W. Cawlfield , Roger E. Bolick, II , Joan A. Mabesoone
发明人： David W. Cawlfield , Roger E. Bolick, II , Joan A. Mabesoone
IPC分类号： C01B17/66 , C04B33/10 , C01B17/45
CPC分类号： C04B33/10 , C01B17/66
摘要： A process for producing an anhydrous alkali metal hydrosulfite comprises contacting hydrate crystals of an alkali metal hydrosulfite with an alkaline aqueous solution of a dehydrating agent having a pH of at least about 7. The slurry formed is maintained at or above the transition temperature to covert the hydrate crystals to anhydrous crystals of the alkali metal hydrosulfite. The process permits the conversion of hydrate crystals to produce anhydrous crystals of alkali metal hydrosulfite without substantial dissolving or decomposition of the alkali metal hydrosulfite.
摘要翻译：制备无水碱金属连二亚硫酸盐的方法包括将碱金属连二亚硫酸盐的水合物晶体与pH至少为约7的脱水剂的碱性水溶液接触。所形成的淤浆保持在或高于转变温度以使将晶体水合至碱金属连二亚硫酸盐的无水晶体。该方法允许水合物晶体的转化产生碱金属连二亚硫酸盐的无水晶体，而碱金属连二亚硫酸盐不会明显溶解或分解。

6. 发明授权

US5112452A Removal of thiosulfate from hydrosulfite solutions 失效
标题翻译：从连二亚硫酸盐溶液中除去硫代硫酸盐
公开(公告)号：US5112452A
公开(公告)日：1992-05-12
申请号：US734362
申请日：1991-07-22
申请人： John L. Stubbs, Jr. , Roger E. Bolick, II , Everett F. Hauser, Jr.
发明人： John L. Stubbs, Jr. , Roger E. Bolick, II , Everett F. Hauser, Jr.
IPC分类号： C01B17/66
CPC分类号： C01B17/66
摘要： A process for treating an alkali metal hydrosulfite solution containing thiosulfate ions as an impurity which comprises reducing cathodically the alkali metal hydrosulfite solution to convert thiosulfate ions to sulfide ions, the alkali metal hydrosulfite solution having a residual alkalinity of from about 0.1 to about 20 grams per liter of hydroxide ion.
摘要翻译：一种用于处理含有硫代硫酸根离子作为杂质的碱金属连二亚硫酸盐溶液的方法，其包括将所述碱金属连二亚硫酸盐溶液阴极还原成硫代硫酸根离子转化为硫离子，所述碱金属连二亚硫酸盐溶液的残留碱度为约0.1至约20克升氢氧根离子。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式