Production of red phosphorus
    1.
    发明授权
    Production of red phosphorus 失效
    生产红磷

    公开(公告)号:US5075088A

    公开(公告)日:1991-12-24

    申请号:US616749

    申请日:1990-11-19

    IPC分类号: C01B25/023

    CPC分类号: C01B25/023

    摘要: Amorphous red phosphorus useful for matches, or as flame retardant is made by forming a slurry of 10-45% red phosphorus in molten white phosphorus, reducing the content of yellow phosphorus to less than 20% of the red phosphorus by separation at less than 280.degree. C., and then heating the product at above 295.degree. C. to convert, and preferably also evaporate, the white phosphorus.

    摘要翻译: 通过在熔融的白磷中形成10-45%红磷的浆料,可以制成用于火柴或阻燃剂的无定形红磷,通过在小于280℃下分离将黄磷含量降低到小于红磷的20% 然后在295℃以上加热该产物以转化并优选蒸发白色磷。

    Process for producing phosphorous acid
    2.
    发明授权
    Process for producing phosphorous acid 失效
    生产磷酸的方法

    公开(公告)号:US5085846A

    公开(公告)日:1992-02-04

    申请号:US685460

    申请日:1991-04-11

    IPC分类号: C01B25/163

    CPC分类号: C01B25/163

    摘要: Phosphorous acid is made by a continuous recycling process from a mixture of phosphorous and hydrochloric acids, comprising:(i) continuously recycling the mixture in a loop apparatus;(ii) adding water to and passing phosphorus trichloride into said recycling mixture so as to generate a condition of turbulent flow at the point of contact of the phosphorus trichloride and the recycling mixture, whereby a reaction product, comprising an aqueous solution of phosphorous and hydrochloric acids as a continuous liquid phase and gaseous hydrogen chloride as gas bubbles of disperse phase, is produced;(iii) separating said gaseous hydrogen chloride;(iv) cooling said reaction product; and(v) recycling at least a portion of said reaction product and repeating steps (ii), (iii) and (iv) thereon to produce a more highly concentrated solution of phosphorus acid.

    Method and apparatus for providing verifiable digital signatures
    4.
    发明授权
    Method and apparatus for providing verifiable digital signatures 失效
    提供可验证数字签名的方法和装置

    公开(公告)号:US06848048B1

    公开(公告)日:2005-01-25

    申请号:US09687288

    申请日:2000-10-13

    申请人: William S. Holmes

    发明人: William S. Holmes

    摘要: A method and apparatus for providing verifiable digital signatures. In one embodiment, a method includes converting, on a computer system, digital data representative of a document into a predetermined format, and applying the predetermined format and a viewer program to a hash function to mathematically operate on the predetermined format and the viewer program and provide a message digest. The viewer program is used for viewing the predetermined format that is a representation of the document. The method further includes encrypting the message digest using a private key to provide a digital signature. In one embodiment, the predetermined format is a bitmap representation of the document. Moreover, in one embodiment, the method further includes incorporating a file in the digital signature, where the file includes one or more parameters specifying an environment of the computer system at the time of creation of the digital signature. The method and apparatus establishes integrity and trust in digital signatures, providing evidence that the sending and receiving parties are seeing the identical view of the digitally signed document(s).

    摘要翻译: 一种用于提供可验证数字签名的方法和装置。 在一个实施例中,一种方法包括在计算机系统上将表示文档的数字数据转换为预定格式,以及将预定格式和观看者程序应用于散列函数,以数学方式对预定格式和观看者节目进行操作,以及 提供消息摘要。 查看器程序用于查看作为文档的表示的预定格式。 该方法还包括使用私钥对消息摘要进行加密以提供数字签名。 在一个实施例中,预定格式是文档的位图表示。 此外,在一个实施例中,该方法还包括将文件合并到数字签名中,其中文件包括在创建数字签名时指定计算机系统的环境的一个或多个参数。 该方法和设备建立了数字签名的完整性和信任,提供了发送方和接收方看到数字签名的文档的相同视图的证据。