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1. 发明授权

US3984525A Manufacture of phosphoric acid 失效
标题翻译：磷酸的制造
公开(公告)号：US3984525A
公开(公告)日：1976-10-05
申请号：US454092
申请日：1974-03-25
申请人： Thomas Alan Williams , Alexander Thomson
发明人： Thomas Alan Williams , Alexander Thomson
IPC分类号： C01B25/22 , C04B7/04 , C01B25/16
CPC分类号： C04B7/04 , C01B25/22
摘要： Production of phosphoric acid by the wet process and by-product calcium sulphate hemihydrate. Sulphuric acid reacts with phosphate rock in such conditions that gypsum is precipitated, the resulting slurry is transferred to a second vessel in which the conditions are such that the gypsum recrystallises to calcium sulphate hemihydrate. Calcium sulphate hemihydrate so produced may be converted to cement and sulphuric acid by a process analogous to the anhydrite process for production of sulphuric acid. The phosphoric acid produced may be desulphated in a process integrated with the phosphoric production.
摘要翻译：通过湿法生产磷酸和副产物硫酸钙半水合物。硫酸在这样的条件下与磷酸盐岩发生反应，使石膏沉淀，所得浆液转移到第二容器中，其中条件使得石膏重结晶为硫酸钙半水合物。如此生产的硫酸钙半水合物可以通过类似于生产硫酸的无水石膏法的方法转化为水泥和硫酸。所产生的磷酸可以在与磷酸生产相结合的过程中脱硫。

2. 发明授权

US3947499A Phosphoric acid purification 失效
标题翻译：磷酸精制
公开(公告)号：US3947499A
公开(公告)日：1976-03-30
申请号：US437891
申请日：1974-01-30
申请人： Robert Harry Edwards , Thomas Alan Williams , Kenneth Hall
发明人： Robert Harry Edwards , Thomas Alan Williams , Kenneth Hall
IPC分类号： C01B25/234 , C01B25/46 , C07C43/00 , C01B15/16 , C01B25/26
CPC分类号： C01B25/46 , C01B25/234
摘要： A solid anhydrous 1:1 molar compound of phosphoric acid and diisopropyl ether is prepared from a mixture of the ether and phosphoric acid in a molar ratio (R:1) of 0.6:1 to 1.4:1 at a temperature at least as low as the crystallization temperature (T.degree.C) governed by the relationship T = 25(1.2-R). Treatment of the compound with water or a base produces purified acid or a phosphate respectively.
摘要翻译：在乙烯与磷酸的摩尔比（R：1）为0.6:1至1.4:1的混合物中，在至少低至少为1：1的温度下，制备磷酸和二异丙醚的固体无水1:1摩尔化合物结晶温度（T°C）由关系T = 25（1.2-R）决定。用水或碱处理化合物分别产生纯化的酸或磷酸盐。

3. 发明授权

US4112118A Process for preparing phosphate salts 失效
标题翻译：制备磷酸盐的方法
公开(公告)号：US4112118A
公开(公告)日：1978-09-05
申请号：US709632
申请日：1976-07-29
申请人： Frank Michael Cussons , Douglas Edward Mather , Thomas Alan Williams
发明人： Frank Michael Cussons , Douglas Edward Mather , Thomas Alan Williams
IPC分类号： C01B25/30 , C01B25/234 , C01B25/28 , C01B25/40 , C01B25/46 , C01B15/16 , C01B25/26
CPC分类号： C01B25/46 , C01B25/28 , C01B25/405
摘要： Phosphate values can be recovered from an organic extract which is formed by contact of wet process phosphoric acid and a water immiscible solvent, in a process in which the extract is treated with an inorganic base or a dihydrogen phosphate salt to give an acid free solvent and an aqueous solution of phosphoric acid and phosphate salt with a cation to P usually in the 0.1 - 0.5 : 1 region. The aqueous solution represents a concentrated soluble phosphate source for subsequent neutralization and conversion to e.g. tripolyphosphates.
摘要翻译：在通过与湿法磷酸和水不混溶的溶剂的接触形成的有机提取物中，可以从无机碱或磷酸二氢盐处理提取物得到无酸溶剂的方法中回收磷酸盐值，磷酸和磷酸盐的水溶液与阳离子通常在0.1-0.5:1区域中。水溶液代表浓缩的可溶性磷酸盐源，用于随后的中和并转化为例如。三聚磷酸盐

4. 发明授权

US4093662A Ether phosphoric acid compound 失效
标题翻译：醚磷酸化合物
公开(公告)号：US4093662A
公开(公告)日：1978-06-06
申请号：US622485
申请日：1975-10-15
申请人： Robert Harry Edwards , Thomas Alan Williams , Kenneth Hall
发明人： Robert Harry Edwards , Thomas Alan Williams , Kenneth Hall
IPC分类号： C01B25/234 , C01B25/46 , C07D105/02 , C01B25/16 , C01B25/26 , C07D107/02
CPC分类号： C01B25/46 , C01B25/234
摘要： A solid anhydrous crystalline compound of the formula H.sub.3 PO.sub.4 [(CH.sub.3).sub.2 CH].sub.2 O. The invention also provides a method of preparing phosphoric acid by evaporating diisopropyl ether off said anhydrous crystalline compound under reduced pressure.
摘要翻译：固体无水结晶化合物，其通式为H 3 PO 4 [（CH 3）2 CH] 2 O。本发明还提供了通过在减压下从所述无水结晶化合物中蒸发二异丙醚制备磷酸的方法。

5. 发明授权

US4071603A Process for preparing phosphoric acid 失效
标题翻译：制备磷酸的方法
公开(公告)号：US4071603A
公开(公告)日：1978-01-31
申请号：US709388
申请日：1976-07-28
申请人： Thomas Alan Williams
发明人： Thomas Alan Williams
IPC分类号： C01B25/22 , C01B25/16 , C01F11/46
CPC分类号： C01B25/22
摘要： In a process for preparing phosphoric acid by contact of sulphuric acid and phosphate rock with filtration of the gypsum slurry and recycle of the rest for contact with fresh rock, a fraction of the recycle slurry is treated with sulphuric acid to convert at least some of the gypsum to calcium sulphate hemihydrate and the slurry comprising hemihydrate is returned to contact the mixture of phosphate rock, phosphoric acid and recycle gypsum slurry. The process gives an easily filtered gypsum slurry with low phosphate losses in the gypsum filter cake.
摘要翻译：在通过硫酸和磷酸盐岩接触制备磷酸的过程中，过滤石膏浆料和再循环剩余部分与新鲜的岩石接触，一部分循环浆料用硫酸处理以将至少一些返回石膏至硫酸钙半水合物，并且将包含半水合物的浆料返回以与磷酸盐岩，磷酸和再循环石膏浆料的混合物接触。该方法在石膏滤饼中提供容易过滤的具有低磷酸盐损失的石膏浆料。

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