铬鞣

This paper summarized the characters and acting principles as well as the application of low temperature plasma technology on the surface modification of protein biomaterials, and forecasted their applied prospects. Especially it make mention of improved absorption and combination of chrome in leather processing by low temperature plasma on the surface modification of collagen fibrils, that it may come into being a new technology of free-chrome.

概述了低温等离子体的特点和作用原理，并总结了低温等离子体技术在蛋白类生物材料表面改性中应用，展望了该技术的应用前景，特别指出了通过低温等离子体对皮胶原纤维的改性处理，有望提高铬的吸收与结合，甚至实现无铬鞣制新技术，这将对传统铬鞣工艺产生重要作用。

Using H2SO4 as acidulant,chromic sulfate with high purity was obtained by crystallization,which was applied to leather industry as chrome tanning agent .

将电镀废水中的六价铬还原成Cr，用化学沉淀法和絮凝法将其转化为Cr3沉淀，通过硫酸酸化，结晶为高纯硫酸铬，作为皮革工业的铬鞣剂。

In two-stage chrome tanning process,the chrome absorptivity can be increased from 86.80%to 99.09%,and the chrome fixation can be increased from 76.07%to 90.21%by the same treatment.

由于胶原对铬的吸收率和固定率的提高，常规铬鞣时可将标准铬粉的用量由传统的6%减少到4%，。

Results indicate that pH of goat bated hides can be adjusted to fit chrome tanning, hides will not be acid swollen and chloride is completely canceled.

结果表明：5%明矾预处理120min即可使软化裸皮的pH调整至适合于铬鞣，且不会酸肿，完全削减了Cl的使用；再用5%铬粉鞣制4h，皮Ts达102℃；鞣制废液中的BOD5、COD分别减少了55%和63%，废液中的铬浓度也得以降低，铬吸收率达91%。

On the basis of the analysis of depositing agents that were generally used in the process of waste chrome liquor,a new complex depositing agent which is composed of sodium stearate,polyacrylamide and soldium hydroxide with proper proportion was prepared by use of condensation principle of charge effect and polymer absorbed layer.

在分析现行废铬鞣液处理可使用的沉淀剂的基础上，运用电荷效应及高分子吸附层的凝聚作用原理，研究出用硬脂酸钠、聚丙烯酰胺和氢氧化物按一定比例制成复合沉淀剂，用于废铬鞣液处理，效果良好。

In this paper, it has been studied that TARA extract and sulphonated fat-liquor are used in the chrome-free process, especially vegetable-aluminium tannage in order to apply it in the tannery.

就塔拉栲胶、磺化加脂剂在无铬鞣中，特别是植铝鞣的鞣制及以后工序对其所鞣革的影响作了一些研究，主要针对在工业上的应用。

To solve this problem,one of the routes with good potential for success is to treat collagen with special modifier to implement high exhaustion chrome tannage by simply providing additional cross-linking sites or binding sites for chromium.

解决这一问题的一条有效途径就是在铬鞣前采用改性剂对胶原进行改性，通过给胶原分子上引入附加交联点和结合点以实现高吸收铬鞣。

A series of novel chrome-free tanning agent s were synthesized from urea,glyoxal,glycine and melamine.

合成了六种新型的同系列的无铬鞣剂；用红外光谱分别证实了它们带有的官能团的存在；并采用氨基酸分析来初步研究这些无铬鞣剂的鞣制机理。

Glyoxylic acid and oxazolidine with carboxyl groups were applied for modification of collagen.

分别应用含羧基的噁唑烷和乙醛酸对皮粉进行化学改性，提高对铬鞣剂的吸收率以达到减少铬鞣污染的目的。

The result showed that some of properties of the leather made by this new technique are better than the ones made by normal process. The new technique without pickling not only leave pickling and basifying out of consideration, but also reduce chrome and clears up the pollution of salt brought from pickling to the environment.

结果表明，与常规浸酸铬鞣法相比，采用C-2000铬鞣剂及相应工艺鞣制的蓝湿革与成革的某些性能得到了提高，可以省去浸酸工序，简化工艺操作，减少酸和盐的污染，降低生产成本。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。