公开(公告)号：EP0013507B2

公开(公告)日：1989-03-08

申请号：EP79303031.3

申请日：1979-12-21

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED ,  NIPPON STAINLESS STEEL CO., LTD.

发明人： Ito, Naoya ,  Saito, Kiichi ,  Yoshida, Takeshi ,  Aoki, Masahiro ,  Okubo, Masao ,  Miki, Masayoshi

IPC分类号： C22C38/40 ,  C22C38/50

CPC分类号： C22C38/48 ,  C22C38/40 ,  C22C38/50 ,  C22C38/58

公开(公告)号：EP0182932A1

公开(公告)日：1986-06-04

申请号：EP84114388.6

申请日：1984-11-28

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED ,  NIPPON STAINLESS STEEL CO., LTD.

发明人： Ohrui, Tetsuya ,  Okubo, Masao ,  Miki, Masayoshi

IPC分类号： C23F11/04

CPC分类号： C23F11/04

摘要： There is provided a method for protecting an apparatus from corrosion, which apparatus treats a nitric acid solution containing heavy metal(s) and/or compound(s) thereof, in which method stainless steel with a silicon content of 1% by weight or blow is used as the material composing the apparatus, and an NOx gas is compulsorily added into the nitric acid solution.

摘要翻译： 提供了一种保护装置免受腐蚀的方法，该装置处理含有重金属和/或其化合物的硝酸溶液，其中硅含量为1重量％的不锈钢或吹塑 用作构成配料的材料，并且将NOx强制添加到硝酸溶液中。

公开(公告)号：EP0013507A1

公开(公告)日：1980-07-23

申请号：EP79303031.3

申请日：1979-12-21

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED ,  NIPPON STAINLESS STEEL CO., LTD.

发明人： Ito, Naoya ,  Saito, Kiichi ,  Yoshida, Takeshi ,  Aoki, Masahiro ,  Okubo, Masao ,  Miki, Masayoshi

IPC分类号： C22C38/40 ,  C22C38/50

CPC分类号： C22C38/48 ,  C22C38/40 ,  C22C38/50 ,  C22C38/58

摘要： A high-silicon-nickel-chromium steel resistant to concentrated nitric acid with a good workability and a good weldability, comprises

carbon in an amount of not more than 0.03% (C ≤ 0.03%),
silicon in an amount of from more than 5%to not more than 7% (5%
manganese in an amount of not more than 10% (Mn ≤ 10%),
chromium in an amount of from not less than 7% to not more than 16% (7% ≤ Cr ≤ 16%),
nickel in an amount of from not less than 10% to less than 19% (10% ≤ Ni
and the balance being iron and inevitable impurities. percentages being by weight.

This steel can be used to provide corrosion resistant surfaces in apparatuses to be brought into contact with concentrated nitric acid.

公开(公告)号：EP0037959B1

公开(公告)日：1984-10-24

申请号：EP81102442.1

申请日：1981-03-31

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED ,  NIPPON STAINLESS STEEL CO., LTD.

发明人： Ito, Naoya ,  Yoshida, Takeshi ,  Aoki, Masahiro ,  Okubo, Masao ,  Miki, Masayoshi

IPC分类号： C22C38/48 ,  C22C38/50 ,  C22C38/58

CPC分类号： C22C38/50 ,  C21C7/0006 ,  C22C38/48 ,  C22C38/58

公开(公告)号：EP0013507B1

公开(公告)日：1983-04-13

申请号：EP79303031.3

申请日：1979-12-21

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED ,  NIPPON STAINLESS STEEL CO., LTD.

发明人： Ito, Naoya ,  Saito, Kiichi ,  Yoshida, Takeshi ,  Aoki, Masahiro ,  Okubo, Masao ,  Miki, Masayoshi

IPC分类号： C22C38/40 ,  C22C38/50

CPC分类号： C22C38/48 ,  C22C38/40 ,  C22C38/50 ,  C22C38/58

公开(公告)号：EP0037959A1

公开(公告)日：1981-10-21

申请号：EP81102442.1

申请日：1981-03-31

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED ,  NIPPON STAINLESS STEEL CO., LTD.

发明人： Ito, Naoya ,  Yoshida, Takeshi ,  Aoki, Masahiro ,  Okubo, Masao ,  Miki, Masayoshi

IPC分类号： C22C38/48 ,  C22C38/50 ,  C22C38/58

CPC分类号： C22C38/50 ,  C21C7/0006 ,  C22C38/48 ,  C22C38/58

摘要： A method for improving (reducing or avoiding) surface defects in a specific steel resistant to concentrated nitric acid is described, wherein the specific steel in the molten state is either a stainless steel comprising C≦ 0.1 wt%. 2.5≦Si≦ 5 wt%. Mn≦2 wt%.

15≦Cr≦20 wt%. 10≦Ni≦22 wt%.
C x 10≦ at least one of Nb. Ta and Zr≦2.5 wt%.
the balance being iron and inevitable impurities.
or a high-silicon-nickel-chromium steel comprising
C≦0.03 wt% 5≦ Si≦7 wt%. Mn≦10 wt%.
7≦Cr≦16 wt% 10≦Ni≦19 wt%.
C 4≦ at least one of Nb. Ta and Zr≦ 2 wt%

the balance being iron and inevitable impurities. and is admixed with titanium (0.05≦Ti≦0.2wt%) when producing said steel.

公开(公告)号：EP0266059B1

公开(公告)日：1992-03-04

申请号：EP87308519.5

申请日：1987-09-25

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED

发明人： Matsuda, Teruo ,  Miki, Masayoshi ,  Ochi, Hiromu

IPC分类号： B01D61/24 ,  B01D61/44

CPC分类号： B01D61/243 ,  B01D61/44 ,  C01B21/1454

公开(公告)号：EP0306268A1

公开(公告)日：1989-03-08

申请号：EP88308019.4

申请日：1988-08-30

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED

发明人： Matsuda, Teruo ,  Miki, Masayoshi ,  Ochi, Hiromu

IPC分类号： C23G1/06

CPC分类号： C23G1/06 ,  C03C23/0075

摘要： To descale the inside of the jacket of a glass-lined vessel (e.g., reaction vessel) or conduit, especially of glass-and-metal, there is used a descaling solution of hydrochloric acid, preferably 5 to 15% by wt., containing 50 to 1,000 ppm of laurylamine, lauryldimethylamine or propargyl alcohol, at a temperature of 40 to 70°C., and optionally containing 0.1 to 5% by wt., of tin (II) chloride.
The cleaning solution is circulated normally for 2 to 6 hours and drained and the jacket rinsed and neutralised with alkali. Iron oxide scale is thus totally removed, without damage by generation of hydrogen gas and without corrosion.

摘要翻译： 为了除去玻璃衬里容器（例如反应容器）或导管（特别是玻璃和金属）的护套的内部，使用盐酸的除垢剂溶液，优选5至15重量％，含有 50至1,000ppm的月桂胺，月桂基二甲胺或炔丙醇，温度为40-70℃，任选含有0.1至5重量％的氯化锡（II）。 清洗溶液通常循环2至6小时并排干，夹套冲洗并用碱中和。 因此，氧化铁垢被完全去除，而不会产生氢气而没有腐蚀。

公开(公告)号：EP0266187A3

公开(公告)日：1988-08-03

申请号：EP87309522

申请日：1987-10-28

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED

发明人： Matsuda, Teruo ,  Miki, Masayoshi ,  Ochi, Hiromu

IPC分类号： C01B21/14 ,  C25B01/00

CPC分类号： B01D61/243 ,  B01D61/422 ,  B01D61/44 ,  B01D61/58 ,  C01B21/1454

摘要： An aqueous solution of hydroxylamine sulfate and a solution of nitric acid are each circulated from tanks (5, 6) through alternate adjacent chambers in an electro­dialysis cell (2) or diffusion dialysis cell, the chambers being separated by cation exchange membrane (1); dialysis occurs so that NH₃OH⁺ and H⁺ ions pass through the membrane and the nitric acid is converted to hydroxylamine nitrate product. The solutions are recirculated by pumps (7, 8). In the hydroxylamine sulfate solution, the SO₄⁻⁻ anions remain, and since the H⁺ ions permeate thereinto, sulfuric acid is formed; and at a concentration of above 0.2 N the SO₄⁻ ion passes through the membrane and would contaminate the product. The NH₃OHNO₃ solution is therefore circulated simultaneously into a diffusion dialysis cell (22) having a number of anion exchange membranes (21); pure water is circulated countercurrently through alternate chambers in the cell (22) to remove the acid.

公开(公告)号：EP0266187A2

公开(公告)日：1988-05-04

申请号：EP87309522.8

申请日：1987-10-28

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED

发明人： Matsuda, Teruo ,  Miki, Masayoshi ,  Ochi, Hiromu

IPC分类号： C01B21/14 ,  C25B1/00

CPC分类号： B01D61/243 ,  B01D61/422 ,  B01D61/44 ,  B01D61/58 ,  C01B21/1454

摘要： An aqueous solution of hydroxylamine sulfate and a solution of nitric acid are each circulated from tanks (5, 6) through alternate adjacent chambers in an electro­dialysis cell (2) or diffusion dialysis cell, the chambers being separated by cation exchange membrane (1); dialysis occurs so that NH₃OH⁺ and H⁺ ions pass through the membrane and the nitric acid is converted to hydroxylamine nitrate product. The solutions are recirculated by pumps (7, 8).
In the hydroxylamine sulfate solution, the SO₄⁻⁻ anions remain, and since the H⁺ ions permeate thereinto, sulfuric acid is formed; and at a concentration of above 0.2 N the SO₄⁻ ion passes through the membrane and would contaminate the product. The NH₃OHNO₃ solution is therefore circulated simultaneously into a diffusion dialysis cell (22) having a number of anion exchange membranes (21); pure water is circulated countercurrently through alternate chambers in the cell (22) to remove the acid.

摘要翻译： 硫酸羟胺水溶液和硝酸溶液各自在电渗析池（2）或扩散透析池中通过相邻的相邻室从罐（5,6）循环，室由阳离子交换膜（1）分离; 发生透析使得NH 3 OH +和H +离子通过膜并将硝酸转化为硝酸羟胺产物。 溶液由泵（7,8）再循环。 在硫酸羟胺溶液中，残留有SO 4 - ， - ，由于H +离子渗入其中，形成硫酸; 并且在0.2N以上的浓度下，SO 4 - 离子通过膜并将污染产物。 因此，NH 3 OHNO 3溶液同时循环到具有多个阴离子交换膜（21）的扩散透析池（22）中; 纯水通过电池（22）中的交替室逆流循环以除去酸。