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1.发明授权Method for regenerating sodium hydroxide by partial autocausticizing sodium carbonate containing smelt by reaction with a borate 有权通过与硼酸盐反应，通过部分自动浓缩含有熔融碳酸钠的氢氧化钠再生氢的方法公开(公告)号：US06294048B1
公开(公告)日：2001-09-25
申请号：US09238828
申请日：1999-01-28
IPC分类号： D21C1104
CPC分类号： D21C11/0078 , D21C3/02 , Y02P40/44
摘要： A method is provided for the use of borates in the recausticization of alkali-containing liquors such as those produced in the chemical and semi-chemical pulping of wood and in the oxidation and bleaching of wood pulp. Sodium hydroxide is regenerated from sodium carbonate-containing smelts in such pulp processes by autocausticization through the addition of limited amounts of borate. Autocausticization may be carried out at boron to carbonate molar ratios below 2:1 and at sodium to boron molar ratios exceeding 3:1, resulting in high reaction efficiency. Partial autocausticization using borate may also be combined with conventional lime recausticization for the regeneration of sodium hydroxide from sodium carbonate-containing smelts.
摘要翻译： 提供了一种方法，用于在含碱液体的再气化中使用硼酸盐，例如在木材的化学和半化学制浆以及木浆的氧化和漂白中生产的那些。 通过加入有限量的硼酸盐，通过自动烧结在这种纸浆方法中从含碳酸钠的熔炼中再生氢氧化钠。 硼酸与碳酸盐摩尔比低于2:1，钠与硼的摩尔比超过3:1可以进行自动烧结，从而产生高反应效率。 使用硼酸盐的部分自动化还可以与传统的石灰再烧结合，用于从含碳酸钠的冶炼中再生氢氧化钠。
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2.发明授权Method of increasing the causticizing efficiency of alkaline pulping liquor by borate addition 失效通过硼酸盐添加提高碱性制浆液的苛化效率的方法公开(公告)号：US06348128B1
公开(公告)日：2002-02-19
申请号：US09275577
申请日：1999-03-24
IPC分类号： D21C1100
CPC分类号： D21C3/02 , D21C11/0078 , Y02P40/44
摘要： A method is provided for improving causticizing efficiency in the conventional lime recausticization portion of an alkaline pulping process. Such processes are commonly used in the pulping and bleaching of wood and non-wood cellulose fiber materials. The method of this invention comprises reacting an aqueous solution of sodium carbonate with lime to produce sodium hydroxide (causticization) in the presence of borate in order to improve the causticization reaction efficiency. Borate is added in an amount sufficient to provide a boron to sodium (B/Na) molar ratio in the range of between about 0.001:1 and 0.4:1, and preferably in the range of between about 0.01:1 and 0.3:1, which results in an increased causticization efficiency of up to 8% over the reaction efficiency obtained in the absence of borate.
摘要翻译： 提供了一种用于提高碱性制浆工艺的常规石灰再生部分中的苛化效率的方法。 这种方法通常用于木材和非木质纤维素纤维材料的制浆和漂白。 本发明的方法包括在硼酸盐存在下使碳酸钠水溶液与石灰反应以产生氢氧化钠（苛性碱化），以提高苛化反应效率。 硼酸盐的添加量足以提供硼/钠（B / Na）摩尔比在约0.001:1和0.4:1之间，优选在约0.01:1至0.3:1之间的范围内， 这导致比在不存在硼酸盐时获得的反应效率高8％的苛化效率。
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3.发明授权Method for regenerating sodium hydroxide by partial autocausticizing sodium carbonate containing smelt by reaction with borate 有权通过与硼酸盐反应，通过部分自动焦化碳酸钠再生氢氧化钠的方法公开(公告)号：US06663749B2
公开(公告)日：2003-12-16
申请号：US09964187
申请日：2001-09-25
IPC分类号： D21C1100
CPC分类号： D21C11/0078 , D21C3/02 , Y02P40/44
摘要： A method is provided for the use of borates in the recausticization of alkali-containing liquors such as those produced in the chemical and semi-chemical pulping of wood and in the oxidation and bleaching of wood pulp. Sodium hydroxide is regenerated from sodium carbonate-containing smelts in such pulp processes by autocausticization through the addition of limited amounts of borate. Autocausticization may be carried out at boron to carbonate molar ratios below 2:1 and at sodium to boron molar ratios exceeding 3:1, resulting in high reaction efficiency. Partial autocausticization using borate may also be combined with conventional lime recausticization for the regeneration of sodium hydroxide from sodium carbonate-containing smelts.
摘要翻译： 提供了一种方法，用于在含碱液体的再气化中使用硼酸盐，例如在木材的化学和半化学制浆以及木浆的氧化和漂白中生产的那些。 通过加入有限量的硼酸盐，通过自动烧结在这种纸浆方法中从含碳酸钠的熔炼中再生氢氧化钠。 硼酸与碳酸盐摩尔比低于2:1，钠与硼的摩尔比超过3:1可以进行自动烧结，从而产生高的反应效率。 使用硼酸盐的部分自动化还可以与传统的石灰再烧结合，用于从含碳酸钠的冶炼中再生氢氧化钠。
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