Process for preparing novel high solids non-aqueous polymer compositions

    公开(公告)号:US5480921A

    公开(公告)日:1996-01-02

    申请号:US299689

    申请日:1994-09-01

    CPC分类号: C08F6/20 C08J3/09

    摘要: The use of falling-film evaporation and a concentration means such as centrifugal separation to dehydrate and concentrate a water-in-oil polymer emulsion or suspension is disclosed. In a preferred embodiment, a water-in-oil polymer composition containing less than about 25% active polymer solids is dehydrated in falling-film evaporator to produce an evaporator concentrate containing less than about 5.0% water. The evaporator concentrate then flows to a separation device such as a centrifuge, wherein oil is removed to produce a composition that is substantially a polymer and emulsifying surfactant-in-oil composition containing in excess of about 60 weight % polymer solids. The centrifuge raffinate may optionally be treated in a second separation means to capture additional polymer solids, with optional recycle of the oil-rich raffinate. The concentrated polymer composition is preferably stabilized with a steric stabilizer to produce a free flowing liquid product.

    Method for producing free-flowing, water-soluble polymer gels
    6.
    发明授权
    Method for producing free-flowing, water-soluble polymer gels 失效
    用于生产自由流动的水溶性聚合物凝胶的方法

    公开(公告)号:US5110851A

    公开(公告)日:1992-05-05

    申请号:US461897

    申请日:1990-01-08

    IPC分类号: C08J3/12

    摘要: The instant invention is directed to a method for preparing free-flowing, water-soluble polymer gels comprising:(a) reducing the size of water-soluble polymer gels by a size-reduction means, so as to produce polymer gel particles which are less than 1/2 inch in their longest dimension; and(b) adding to the size-reduced polymer gels of Step (a) 0.001 to 20 percent, by weight, of an amphipathic compound, thereby reducing the adhesion of said gel particles to themselves and other substances.The instant invention is also directed to a free-flowing, water-soluble polymer gel admixture comprising:(a) size-reduced, water-soluble polymer gel particles, wherein said gel particles are less than 1/2 inch in their longest dimension; and(b) an amphipathic compound.

    摘要翻译: 本发明涉及一种制备自由流动的水溶性聚合物凝胶的方法,其包括:(a)通过减小尺寸的方法减小水溶性聚合物凝胶的尺寸,以便产生较少的聚合物凝胶颗粒 超过1/2英寸的最长尺寸; 和(b)向步骤(a)的尺寸减小的聚合物凝胶中加入0.001至20重量%的两亲性化合物,从而降低所述凝胶颗粒对其自身和其它物质的粘附性。 本发明还涉及一种自由流动的水溶性聚合物凝胶混合物,其包含:(a)尺寸减小的水溶性聚合物凝胶颗粒,其中所述凝胶颗粒的最长尺寸小于1/2英寸; 和(b)两亲性化合物。

    Method of clarifying phosphoric acid
    8.
    发明授权
    Method of clarifying phosphoric acid 失效
    澄清磷酸的方法

    公开(公告)号:US5318707A

    公开(公告)日:1994-06-07

    申请号:US936462

    申请日:1992-08-28

    IPC分类号: B01D21/01 C01B25/235

    CPC分类号: C01B25/235 B01D21/01

    摘要: A method for clarifying phosphoric acid by flocculation or coagulation of solids wherein an effective amount of a carboxylic-type polymer having a portion of sulfonic functionality is used as the clarification aid. Preferred polymers are high molecular weight acrylic acid/acrylamido methylpropyl sulfonic acid-type polymers.

    摘要翻译: 用于通过絮凝或固体凝固来澄清磷酸的方法,其中使用有效量的具有一部分磺酸官能团的羧酸类聚合物作为澄清助剂。 优选的聚合物是高分子量丙烯酸/丙烯酰胺基甲基丙基磺酸型聚合物。

    Methods for removing solids from water-based paint systems
    9.
    发明授权
    Methods for removing solids from water-based paint systems 失效
    从水性涂料体系中除去固体的方法

    公开(公告)号:US5236598A

    公开(公告)日:1993-08-17

    申请号:US961731

    申请日:1992-10-15

    IPC分类号: C02F1/54 C09D7/00

    CPC分类号: C09D7/008 C02F1/54 Y10S210/93

    摘要: A novel method of treating circulating water containing over-sprayed, water-borne paint, such as in a paint spray booth operation, comprises adjusting the alkalinity of the paint spray booth water to between about 20 and 600 ppm, on a calcium carbonate basis, by adding a designated alkalinity source thereto, adding a cationic potato starch to the water, contacting the over-sprayed, water-borne paint with the alkalinity-adjusted paint spray booth water after addition of the cationic potato starch, adding an effective amount of a polymer floccing agent to the paint spray booth water, and removing resulting sludge from the paint spray booth water.

    摘要翻译: 一种处理含有过喷水性涂料的循环水的新方法,例如在喷漆室操作中,包括以碳酸钙为基础将喷漆室水的碱度调节至约20至600ppm之间, 通过向其中加入指定的碱度源,向水中加入阳离子马铃薯淀粉,在加入阳离子马铃薯淀粉后使过喷雾的水性涂料与碱性调节的喷漆室水接触,加入有效量的 聚合物絮凝剂到喷漆房水中,并从喷漆室水中除去污泥。

    Method of improving gypsum slurry filtration in the production of
phosphoric acid
    10.
    发明授权
    Method of improving gypsum slurry filtration in the production of phosphoric acid 失效
    在磷酸生产中改善石膏浆料过滤的方法

    公开(公告)号:US5211928A

    公开(公告)日:1993-05-18

    申请号:US775888

    申请日:1991-10-15

    IPC分类号: C01B25/225

    CPC分类号: C01B25/225

    摘要: A method for improving gypsum slurry filtration in the production of wet process phosphoric acid wherein an effective amount of carboxylic-type polymer having a portion of sulfonic functionality is used as the filtration aid. Preferred polymers are high molecular weight polymers of acrylic acid and acrylamido methylpropyl sulfonic acid.

    摘要翻译: 一种用于在湿法磷酸生产中改进石膏浆料过滤的方法,其中使用有效量的具有一部分磺酸官能团的羧酸类聚合物作为过滤助剂。 优选的聚合物是丙烯酸和丙烯酰胺基甲基丙基磺酸的高分子量聚合物。