公开(公告)号：US4276276A

公开(公告)日：1981-06-30

申请号：US135025

申请日：1980-03-28

申请人： James P. Van Hook ,  Clair E. Hildebrand ,  Chong H. Chan

发明人： James P. Van Hook ,  Clair E. Hildebrand ,  Chong H. Chan

IPC分类号： C01B21/50 ,  C01B21/20

CPC分类号： C01B21/50

摘要： An improved process for nitrite production is based on controlled oxidation of nitric oxide in a mixture of nitrogen oxides and oxygen. Oxidized gas is absorbed into an aqueous solution containing a basically reacting ammonium or alkali metal compound to produce nitrite and unabsorbed exit gas. The mole ratio of nitric oxide (NO) to nitrogen dioxide (NO.sub.2) in the unabsorbed exit gas is maintained within a range between 0.8 and 1.2 by either recycling a selected fraction of oxidized gas through the oxidizer or by selectively splitting the inlet stream to the oxidizer. Increased product yield as well as reduced NO.sub.x emissions are achieved as a result.

摘要翻译： 亚硝酸盐生产的改进方法是基于氮氧化物和氧气的混合物中一氧化氮的受控氧化。 氧化气体被吸收到含有基本上反应的铵或碱金属化合物的水溶液中以产生亚硝酸盐和未吸收的出口气体。 未吸收的出口气体中的一氧化氮（NO）与二氧化氮（NO 2）的摩尔比通过将选定份数的氧化气体循环通过氧化剂或将入口流选择性地分离到 氧化剂。 因此，提高产品产量以及减少NOx排放。

公开(公告)号：US4489041A

公开(公告)日：1984-12-18

申请号：US511368

申请日：1983-07-06

申请人： Franklin S. Wong ,  Clair E. Hildebrand

发明人： Franklin S. Wong ,  Clair E. Hildebrand

IPC分类号： B01J12/00 ,  B01J19/08 ,  C22B4/00 ,  C22B9/22 ,  C22C35/00 ,  H01J37/32 ,  H05H1/28 ,  H05H1/42 ,  C07G13/00

CPC分类号： H01J37/3244 ,  B01J12/002 ,  B01J19/088 ,  C22B4/00 ,  C22B4/005 ,  C22B9/226 ,  C22C35/005 ,  H05H1/28 ,  H05H1/42 ,  B01J2219/0894

摘要： An improved apparatus and an associated method for the reduction of low melting point oxides in a falling film plasma reactor is disclosed. The improved torch provides a radiation barrier to avoid premature melting of the reactants that cause clogging of the reactor.

摘要翻译： 公开了一种用于还原降膜等离子体反应器中的低熔点氧化物的改进的装置和相关方法。 改进的手电筒提供辐射屏障，以避免反应物的过早熔化，导致反应器堵塞。

公开(公告)号：US4486226A

公开(公告)日：1984-12-04

申请号：US556492

申请日：1983-11-30

申请人： Clair E. Hildebrand ,  Franklin S. Wong

发明人： Clair E. Hildebrand ,  Franklin S. Wong

IPC分类号： C01B35/04 ,  C21C5/52 ,  C22C33/00 ,  C22C33/04

CPC分类号： C22C33/003 ,  C21C5/5264 ,  Y02P10/216

摘要： A process for preparing ferroboron comprises first heating a mixture of boron oxide or boric acid, iron or iron oxide, carbon, and a carbohydrate to produce a foraminous char. During a subsequent two-stage reduction process in an electric or arc plasma furnace, ferroboron is produced and gaseous boric oxides are evolved. The boron values are captured as they move to the cooler regions of the furnace, resulting in high boron yields. The process is particularly useful in preparing pure and inexpensive raw material for the production of amorphous ferroalloys.

摘要翻译： 制备铁硼的方法包括首先加热氧化硼或硼酸，铁或氧化铁，碳和碳水化合物的混合物以产生多孔炭。 在电弧或电弧等离子体炉中的后续的两阶段还原过程中，产生铁硼，并产生气态的氧化硼。 当硼移动到炉的较冷区域时，硼值被捕获，导致高硼产率。 该方法在制备用于生产无定形铁合金的纯的和便宜的原料中特别有用。