-
公开(公告)号：US4132718A
公开(公告)日：1979-01-02
申请号：US748345
申请日：1976-12-07
IPC分类号： C07D301/28 , C08G59/00 , C08G59/02 , C08G59/06
CPC分类号： C08G59/063
摘要： A liquid epoxy resin is produced by gradually feeding an aqueous solution of alkali metal hydroxide into a solution of bisphenol-A in epichlorohydrin, while maintaining the reaction medium at boiling point, distilling off water in the form of an azeotrope with epichlorohydrin and recycling the latter, and maintaining a water content of from 0.1 to 0.7 wt.% and a pH value between 7 and 9 in said reaction medium. The liquid epoxy resins thus obtained have low values of the viscosity, epoxy equivalent and hydrolyzable chlorine content.
摘要翻译： 通过将碱金属氢氧化物水溶液逐渐加入到表氯醇中的双酚A的溶液中，同时将反应介质保持在沸点，蒸馏出与表氯醇形成的共沸物形式的水并再循环使用，生成液体环氧树脂 并且在所述反应介质中保持0.1至0.7重量％的水含量和7至9的pH值。 由此得到的液体环氧树脂的粘度，环氧当量和可水解的氯含量低。
-
72.发明授权
公开(公告)号：US4128457A
公开(公告)日：1978-12-05
申请号：US776042
申请日：1977-03-09
CPC分类号： C07C7/08 , Y10S203/20
摘要： Butadiene is recovered from a hydrocarbon fraction containing it together with butenes and acetylene hydrocarbons by introducing said fraction into a first extractive distillation column, feeding aqueous acetonitrile into said column above the introduction point of said fraction and extracting a vapor stream containing butadiene below said introduction point; feeding said vapor stream into a second extractive distillation column, feeding aqueous acetonitrile above the introduction point of said vapor stream and recovering a vapor stream consisting essentially of butadiene at the top of said second column; and rectifying this last vapor stream to recover pure butadiene.
摘要翻译： 通过将所述级分引入第一萃取蒸馏塔中，将含有它的烃馏分与丁烯和乙炔烃一起回收丁二烯，将乙腈水溶液加入所述级分的引入点上方的所述塔中，并将含有丁二烯的蒸汽流提取到所述引入点 ; 将所述蒸气流进料到第二萃取蒸馏塔中，将水性乙腈输送到所述蒸汽流的引入点上方，并回收基本上由所述第二塔顶部的丁二烯组成的蒸气流; 并对最后的蒸汽流进行精馏以回收纯丁二烯。
-
公开(公告)号：US4058389A
公开(公告)日：1977-11-15
申请号：US785706
申请日：1977-04-07
CPC分类号： C05D9/02 , C01C1/24 , Y10S71/903
摘要： A soil modifying composition and a concentrated solution of ammonium sulphate with a high purity degree are obtained from by-products consisting essentially of ferrous sulphate heptahydrate, obtained in the production of titanium dioxide from ilmenites by the sulphate process, by contacting solid particles of said by-products with gaseous ammonia, lixiviating the resulting product with water, thereby to recover said concentrated solution of ammonium sulphate, the dried residual solid yielding said soil modifying composition.
摘要翻译： 通过硫酸盐法从钛铁矿生产二氧化钛得到的基本上由硫酸亚铁七水合物组成的副产物得到土壤改良组合物和浓度高的硫酸铵溶液， - 用气态氨产物，将所得产物与水混合，从而回收所述浓硫酸铵溶液，干燥的残余固体产生所述土壤改性组合物。
-
公开(公告)号：US4054555A
公开(公告)日：1977-10-18
申请号：US685603
申请日：1976-05-12
申请人： Jacob Ackermann , Pierino Radici
发明人： Jacob Ackermann , Pierino Radici
IPC分类号： C07C47/14
CPC分类号： C07C45/79
摘要： Purification of haloaldehydes in a process that consists essentially of a first stage of purification in which the haloaldehydes are brought into contact with an absorbent solid, basic in nature, in the presence of water or free alcohols, and of a second stage of purification in which the halo-aldehydes thus treated are brought into contact with a solid absorbent carrying sulphonic, phosphonic or carboxylic acid groups in the form of salts of alkali or alkaline earth metals.
摘要翻译： 在基本上由卤代醛与吸收性固体接触的第一级纯化的方法中纯化卤代醛，其本质上为碱性，在水或游离醇的存在下，和第二级纯化，其中 这样处理的卤代醛与携带有碱金属或碱土金属盐形式的磺酸，膦酸或羧酸基的固体吸收剂接触。
-
公开(公告)号：US4050951A
公开(公告)日：1977-09-27
申请号：US638161
申请日：1975-12-05
申请人： Luigi Piccolo , Benedetto Calcagno , Emilio Bossi
发明人： Luigi Piccolo , Benedetto Calcagno , Emilio Bossi
IPC分类号： C09C1/36
CPC分类号： C09C1/3661 , C01P2004/84
摘要： Titanium dioxide is post-treated by flowing it in a tubular zone as a suspension in a stream of carrier gas, injecting a gaseous stream of halides of Si, Ti and Al in said stream and then steam in the resulting mixture, once the latter is homogenized.
摘要翻译： 将二氧化钛在作为载气流中的悬浮液的管状区域中流动，在所述流中注入Si，Ti和Al的卤化物气体，然后在所得混合物中蒸汽，一旦后者为 均质
-
76.发明授权
公开(公告)号：US4045205A
公开(公告)日：1977-08-30
申请号：US703144
申请日：1976-07-07
IPC分类号： C09K17/00 , C01B17/50 , C01G49/00 , C01G49/14 , C05D9/02 , C09K17/02 , C09K101/00 , C05D9/00
CPC分类号： C01G49/00 , Y10S71/903
摘要： Soil modifiers comprising from 80 to 95% by weight of a mixture of ferric oxide and ferric sulphate in an oxide/sulphate weight ratio of from 0.2:1 to 2:1 are prepared by calcining at 500.degree.-600.degree. C in the presence of an oxidizing gas a material consisting essentially of ferrous sulphate with an average number of molecules of crystallization of from 1 to 5 obtained by partial dehydration of the waste materials, consisting essentially of ferrous sulphate heptahydrate, obtained in the manufacture of titanium dioxide from ilmenites or ilmenite slags by the sulphate process. These modifiers are particularly suitable for clay soils.
摘要翻译： 包含80至95重量％氧化铁和硫酸铁的氧化物/硫酸盐重量比为0.2:1至2:1的混合物的土壤改性剂通过在500-600℃下，在存在 一种氧化气体，一种主要由硫酸亚铁组成的材料，其平均结晶分子数为1至5，通过废料的部分脱水获得，其基本上由硫酸亚铁七水合物制成，其由钛铁矿或钛铁矿制造二氧化钛 硫酸盐过程渣。 这些改性剂特别适用于粘土。
-
77.发明授权Plural stage recovery of trioxane in a process having a molecular distillation step 失效在具有分子蒸馏步骤的方法中，三恶烷的多级回收
公开(公告)号：US4043873A
公开(公告)日：1977-08-23
申请号：US677952
申请日：1976-04-19
IPC分类号： C07D323/06 , B01D3/12
CPC分类号： C07D323/06
摘要： Process for the separation of trioxane from aqueous solutions containing it together with formaldehyde, which comprises subjecting the said solutions to evaporation at temperatures of 100.degree. C or lower, at pressures lower than atmospheric, and with residence times of less than 1 minute under the evaporation conditions, with vaporization of a quantity of from about 5 to about 15% by weight of the solution introduced, and recovering the trioxane from the products evaporated in this way.
摘要翻译： 将含有它的水溶液与甲醛一起分离三恶烷的方法，其中包括使所述溶液在低于大气压的压力下在100℃或更低的温度下蒸发，并且在蒸发下的停留时间小于1分钟 条件，蒸发量为所引入溶液的约5至约15重量％，并从以这种方式蒸发的产物中回收三恶烷。
-
公开(公告)号：US4018873A
公开(公告)日：1977-04-19
申请号：US639194
申请日：1975-12-09
CPC分类号： C01B21/26
摘要： Nitric acid having a concentration of at least 98 wt.% is prepared by recovering in liquid state nitrogen peroxide from a gaseous flow containing the same, by absorption in nitric acid, heating of the resulting solution and liquefaction of the gaseous peroxide evolved, followed by a first chemical absorption of a fraction of the liquid peroxide with nitric acid at 70-80% and air and distillation of the resulting concentrated nitric acid. The gaseous products discharged from said first absorption and comprising unreacted peroxide and air are contacted with nitric acid and water in a second chemical absorption stage, thereby to produce the nitric acid used in the first absorption. The remaining fraction of liquid peroxide is delivered to the distillation column, discharged at the top thereof and recycled to the liquefaction stage, while nitric acid is extracted at the bottom of the distillation column and recycled to the second absorption stage.
摘要翻译： 具有至少98重量％浓度的硝酸是通过在含氮氧化物的气态流中在液态氮中回收，通过在硝酸中吸收，加热所得溶液和液化所产生的气态过氧化物，然后制备的 用硝酸70-80％的一部分液体过氧化物进行第一次化学吸收并蒸馏所得浓硝酸。 从第一次吸收排出的含有未反应的过氧化物和空气的气体产物在第二化学吸收阶段与硝酸和水接触，从而产生在第一次吸收中使用的硝酸。 液体过氧化物的剩余部分被输送到蒸馏塔，在其顶部排出并再循环到液化阶段，同时在蒸馏塔的底部提取硝酸并再循环到第二吸收阶段。
-
79.发明授权Process for the continuous preparation of polyglycidyl ethers of polyhydroxy phenols 失效连续制备多羟基酚聚缩水甘油醚的方法
公开(公告)号：US4017523A
公开(公告)日：1977-04-12
申请号：US582518
申请日：1975-05-30
IPC分类号： C07D301/28 , C07D303/24 , C08G59/00 , C08G59/06
CPC分类号： C08G59/063 , C07D303/24
摘要： Liquid epoxy resins are produced by contacting a dihydroxy phenol with an excess of epihalohydrin and an aqueous solution of an alkali metal hydroxide in a molar ratio of hydroxide to phenol not exceeding 2:1, recovering from the reaction products an epoxy resin having a content of hydrolyzable chlorine of from 1 to 6% by weight, contacting a solution of the resin in a hydrocarbon with an aqueous solution of an alkali metal hydroxide while maintaining an atomic ratio of alkali metal to hydrolyzable chlorine contained in the resin of from 1:1 to 1.17:1 and recovering from the reaction products a liquid epoxy resin having a content of hydrolyzable chlorine less than 0.02% by weight.These epoxy resins of high purity are particularly useful as varnishes or coatings.
摘要翻译： 通过使二羟基苯酚与过量的表卤代醇和氢氧化物与苯酚的摩尔比不超过2:1的碱金属氢氧化物的水溶液接触来制备液体环氧树脂，从反应产物中回收含有 可水解氯为1至6重量％，将烃中的树脂溶液与碱金属氢氧化物水溶液接触，同时保持树脂中所含的碱金属与可水解氯的原子比为1:1至 1.17:1，并从反应产物中回收具有低于0.02重量％的可水解氯含量的液体环氧树脂。
-
公开(公告)号：US4014977A
公开(公告)日：1977-03-29
申请号：US679125
申请日：1976-04-21
IPC分类号： C01G23/053 , C01G23/06
CPC分类号： C01G23/0534 , C01P2004/50 , C01P2004/51 , C01P2004/62 , C01P2006/60
摘要： Titanium sulphate solutions obtained in the sulphate process from titaniferous materials are hydrolized by contacting at 88.degree.-98.degree. C water with a first titanium sulphate solution having a TiO.sub.2 titer of 230-260 g/l and an acid factor of 1.75-1.85, adding at 88.degree.-98.degree. C to the mixture a second titanium sulphate solution having a TiO.sub.2 titer of 230-260 g/l and an acid factor of 2.1-2.4 and heating the resulting mixture at boiling point. A volumetric ratio of from 3:100 to 12:100 is maintained between the first and the second solution.
摘要翻译： 在含钛材料的硫酸盐工艺中获得的硫酸钛溶液通过在88℃-98℃下与TiO 2滴定度为230-260g / l和酸度因子1.75-1.85的第一硫酸钛溶液接触而水解，加入 在88℃-98℃下向混合物中加入TiO 2滴定度为230-260g / l，酸值为2.1-2.4的第二硫酸钛溶液，并在沸点下加热得到的混合物。 在第一和第二溶液之间保持体积比为3：100至12：100。
-
-
-
-
-
-
-
-
-
搜索结果
86 条记录 (耗时 0.038 秒)
