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    • 6. 发明申请
    • PHOTOCHROMIC MATERIALS COMPRISING HALOALKYL GROUPS
    • 包含HALOALKYL组的光致变色材料
    • US20070278461A1
    • 2007-12-06
    • US11695126
    • 2007-04-02
    • Olga G. PetrovskaiaAnu ChopraPatrick M. Brown
    • Olga G. PetrovskaiaAnu ChopraPatrick M. Brown
    • C08L73/00C07D309/00C07D413/02
    • G03C1/73C07D309/32C07F7/1804C09B57/00C09K9/02
    • Various non-limiting embodiments of the present invention relate to photochromic materials which include a haloalkyl group. More particularly, various non-limiting embodiments disclosed herein provide photochromic materials including an indeno-fused naphthopyran, such as, an indeno[2′,3′:3,4]naphtho[1,2-b] pyran, and a haloalkyl group bonded at the 13-position thereof, wherein the haloalkyl group is a perhalogenated group or a group represented by —O(CH2)a(CX2)bCT3, wherein T is a halogen, each X is independently hydrogen or halogen, a is an integer ranging from 1 to 10, and b is an integer ranging from 1 to 10. Other non-limiting embodiments disclosed herein provide photochromic composition and photochromic articles, such as, but not limited to ophthalmic lens, which include the disclosed photochromic materials and methods of making the same.
    • 本发明的各种非限制性实施方案涉及包含卤代烷基的光致变色材料。 更具体地,本文公开的各种非限制性实施方案提供光致变色材料,包括茚并稠合的萘并吡喃,例如茚并[2',3':3,4]萘并[1,2-b]吡喃和卤代烷基 在其13位上键合,其中卤代烷基是全卤代基或由-O(CH 2 CH 2)a表示的基团(CX 2) 其中T是卤素,每个X独立地是氢或卤素,a是1到10的整数,并且b是一个整数。 本文公开的其它非限制性实施方案提供光致变色组合物和光致变色制品,例如但不限于眼科镜片,其包括所公开的光致变色材料及其制备方法。
    • 10. 发明授权
    • Process for the production of high purity lithium hydroxide
    • 高纯度氢氧化锂生产工艺
    • US4036713A
    • 1977-07-19
    • US663851
    • 1976-03-04
    • Patrick M. Brown
    • Patrick M. Brown
    • C25B1/46C25B1/20C25B1/26
    • C25B1/20C01D15/08
    • A process is described in which a brine from natural or other sources, containing lithium and other alkali and alkaline earth metals primarily as the halides, is preliminarily concentrated to a lithium content of about 2 to 7% to separate most of the alkali and alkaline earth metals other than lithium by precipitation, the pH of such a concentrated brine is then increased to about 10.5 to about 11.5, preferaly utilizing a product of the process, lithium hydroxide to precipitate substantially all of any remaining magnesium contaminants, and adding lithium carbonate to remove the calcium contaminants to provide a purified brine which is electrolyzed as the anolyte in a cell having a cation selective permeable membrane separating the anolyte from the catholyte, the latter being of water or aqueous lithium hydroxide, whereby the lithium ions migrate through the membrane to form substantially pure aqueous lithium hydroxide in the catholyte, a product from which highly pure lithium crystalline compounds such as lithium hydroxide monohydrate or lithium carbonate may be separated.
    • 描述了一种方法,其中将含有锂和其它碱金属和碱土金属主要作为卤化物的天然或其他来源的盐水预先浓缩至约2至7%的锂含量以分离大部分碱和碱土 然后通过析出除了锂以外的金属,然后将这种浓缩的盐水的pH提高到约10.5至约11.5,优选利用该方法的产物,氢氧化锂基本上沉淀所有剩余的镁污染物,并加入碳酸锂以除去 钙污染物提供纯化的盐水,其在具有阳离子选择性渗透膜的电池中作为阳极电解液电解,所述阳离子选择性渗透膜将阴极电解液与阴极电解液分离,后者是水或氢氧化锂水溶液,由此锂离子迁移通过膜形成 基本上纯的氢氧化锂水溶液,是高纯度锂晶体的产品 可以分离出诸如氢氧化锂一水合物或碳酸锂之类的化合物。