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1. 发明授权

US4680145A Process for producing diperoxoic acids 失效
标题翻译：二过氧酸生产方法
公开(公告)号：US4680145A
公开(公告)日：1987-07-14
申请号：US891825
申请日：1986-08-01
申请人： Keith M. Taylor , Liou-Liang Horng , Timothy K. Hirzel
发明人： Keith M. Taylor , Liou-Liang Horng , Timothy K. Hirzel
IPC分类号： C07C409/24 , C11D3/39 , C07C178/00
CPC分类号： C11D3/3945 , C07C407/00
摘要： Substituted-butanediperoxoic acids are produced by peroxidizing substituted succinic anhydride in a strong acid reaction medium in the presence of a reaction modifier. Product throughput is improved and product recovery is enhanced. The substituted-butanediperoxoic acids are particularly useful as bleaching agents.
摘要翻译：在反应调节剂存在下，通过在强酸反应介质中过氧化取代的琥珀酸酐来制备取代的丁二酸二辛酸。产品吞吐量提高，产品回收率提高。取代的丁二酸二辛酸特别可用作漂白剂。

2. 发明授权

US5068421A Chemical process 失效
标题翻译：化学工艺
公开(公告)号：US5068421A
公开(公告)日：1991-11-26
申请号：US585541
申请日：1990-09-20
申请人： Liou-Liang Horng
发明人： Liou-Liang Horng
IPC分类号： C07C51/367
CPC分类号： C07C51/367
摘要： There is disclosed herein improved processes for the preparation of ether carboxylates by reacting in an alkaline reaction medium the salts of maleic acid and malic acid in the presence of a calcium ion catalyst wherein unreacted acid salts are recovered from the reaction medium by lowering the pH of the reaction medium to a range of from about 4 to about 6 in two steps, the first step ending at a pH in the range of from about 7 to about 8.5. The precipitate is removed and the pH of the reaction medium is then lowered further to a pH in the range of from 4 to 6. The precipitated salts are recycled to the synthesis reaction to prepared additional amounts of product.
摘要翻译：本文公开了通过在碱性反应介质中在钙离子催化剂存在下使马来酸和苹果酸的盐反应制备醚羧酸盐的改进方法，其中从反应介质中回收未反应的酸盐，通过降低pH 该反应介质在约4至约6的范围内分两步进行，第一步以约7至约8.5的pH结束。除去沉淀物，然后将反应介质的pH进一步降低至4至6范围内的pH。将沉淀的盐再循环至合成反应以制备额外量的产物。

3. 发明授权

US4959496A Chemical process 失效
公开(公告)号：US4959496A
公开(公告)日：1990-09-25
申请号：US235854
申请日：1988-08-24
申请人： Marvin M. Crutchfield , Liou-Liang Horng , Robert G. Schultz
发明人： Marvin M. Crutchfield , Liou-Liang Horng , Robert G. Schultz
IPC分类号： B01J31/04 , B01J38/62 , C07B61/00 , C07C51/367 , C07C51/373 , C07C51/41 , C07C51/487 , C07C59/305
CPC分类号： C07C51/367
摘要： There is disclosed herein improved processes for the preparation of ether carboxylates by reacting in an alkaline reaction medium the salts of maleic acid and a carboxylic or polycarboxylic acid having a reactive hydroxyl group on a non-carbonyl carbon atom in the presence of a calcium ion catalyst wherein unreacted acid salts are recovered from the reaction medium by lowering the pH of the reaction medium to a range of from about 4 to about 6. The precipitated salts are recycled to the synthesis reaction to prepare additional amounts of product.

4. 发明授权

US4950787A Chemical process 失效
公开(公告)号：US4950787A
公开(公告)日：1990-08-21
申请号：US236080
申请日：1988-08-24
申请人： Edward J. Griffith , Liou-Liang Horng , Mark E. Jason
发明人： Edward J. Griffith , Liou-Liang Horng , Mark E. Jason
IPC分类号： B01J31/04 , B01J38/62 , C07B61/00 , C07C51/367 , C07C51/41 , C07C51/487 , C07C59/347 , C11D3/20
CPC分类号： C11D3/2089 , C07C51/367 , F02B2275/18
摘要： There is disclosed an improved process for preparing 1-hydroxy-3-oxa-1,2,4,5-pentane tetracarboxylic acid and 3,6-dioxa-1,2,4,5,7,8-octane hexacarboxylic acid wherein the unreacted starting acids are recovered in more desirable crystal habit. The acids are precipitated in salt form by lowering the pH of the reaction product to a range of from 4 to below 6 stepwise. The pH is lowered to above 6 in the first step and then relatively rapidly reduced to the desired level in the second step.

5. 发明授权

US4904824A Chemical process 失效
公开(公告)号：US4904824A
公开(公告)日：1990-02-27
申请号：US236096
申请日：1988-08-24
申请人： Liou-Liang Horng , Chung Y. Shen , Mark E. Jason
发明人： Liou-Liang Horng , Chung Y. Shen , Mark E. Jason
IPC分类号： B01J31/04 , B01J38/62 , C07B61/00 , C07C51/367 , C07C51/41 , C07C51/487 , C07C59/347 , C11D3/20
CPC分类号： C11D3/2089 , C07C51/367
摘要： There is disclosed herein improved processes for the preparation of mixtures of alkali metal salts of 1-hydroxy-3-oxa-1,2,4,5-pentane tetracarboxylate and alkali metal salts of 3,6-dioxa-1,2,4,5,7,8-octane hexacarboxylate wherein by-product calcium carbonate produced by the process of making such mixtures is employed in a recycle pattern to prepare additional amounts of mixtures of said compounds.

6. 发明授权

US4867901A Improved process for reacting salts of D,L-tartaric and maleic acid in the production of ether carboxylate mixtures 失效
标题翻译：改进的D，L-酒石酸和马来酸盐在醚羧酸酯混合物的生产中的反应
公开(公告)号：US4867901A
公开(公告)日：1989-09-19
申请号：US236496
申请日：1988-08-24
申请人： Richard J. Bosch , Liou-Liang Horng
发明人： Richard J. Bosch , Liou-Liang Horng
IPC分类号： B01J31/04 , B01J35/12 , B01J38/62 , C07B61/00 , C07C51/367 , C07C51/41 , C07C51/487 , C07C59/305
CPC分类号： C07C51/367
摘要： There is disclosed herein improved processes for the preparation of mixtures of alkali metal salts of 1-hydroxy-3-oxa-1,2,4,5-pentane tetracarboxylate and alkali metal salts of 3,6-dioxa-1,2,4,5,7,8-octane hexacarboxylate wherein D,L-tartaric acid is employed and recovered by lowering the pH of the reaction medium to within the range of from about 7 to about 9.5. At the reduced pH calcium D,L-tartrate precipitates and is easily separated. The recovered tartrate may be recycled to the synthesis reaction to prepare further product.

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