铬革

The thesis focused on recycling of chrome leather wastes and transforming them into value-added products.

作为世界皮革加工中心，我国每年约产生70多万吨铬革渣，其主要成分为胶原蛋白和铬盐。

We find good ways to hydrolyze and modify by experiments. Through the experiment, good tanning, retanning and filling properties, as well as, better chrome exhaustion are found in the modified products, with the help of selecting suitable ways to hydrolyze and modify the chrome shavings. The crust leather is possessed of fullness, softness, good dyestuff...

通过实验研究，选择适宜的水解铬革屑的方法和改性条件，发现改性产品在应用中具有较好的鞣制复鞣填充作用，可促进对铬的吸收，坯革丰满、柔软、有弹性，粒纹清晰细致；对染料吸收性好、着色均匀；并可提高成革的收缩温度，降低废液中的含铬量

The results show that the shrinkage temperature of the leather tanned with QUIMITAN ABC is 101.4℃, and the physical-mechanical properties of QUIMITAN ABC tanning leather are better than that of chrome powder tanning leather; the content of Cr2O3 (0.4142 g/L) in the float of QUIMITAN ABC tanning is lower than that of the content of Cr2O3 (1.9481 g/L) chrome powder tanning, it's clear that QUIMITAN ABC tanning is good for Cleaner production; under the same content of chromic oxide, the physical properties of retanning leather with QUIMITAN ABC are better than that of retanning leather with chrome containing sytan and chrome powder, such as thichkening, flexibility, physical-mechanical properties.

结果表明：QUIMITAN ABC主鞣后的坯革的收缩温度为101.4℃，且其坯革物理力学性能高于用6%的铬粉主鞣后的坯革；QUIMITAN ABC主鞣后的废液Cr2O3含量(0.4142 g/L)明显低于用6%的铬粉主鞣后废液Cr2O3含量(1.9481 g/L)，用QUIMITAN ABC主鞣有益于清洁化生产；在Cr2O3含量相同的情况下，用QUIMITAN ABC复鞣的坯革在增厚率、柔软度、物理力学性能等方面都要好于含铬鞣剂及铬粉复鞣的坯革。

With only 2% chromium powder, the nano-composite tanning agent can thicken the leather by 124.5%, the shrinkage temperature reaches to 95 DEG C.; compared with a chrome tanned leather, a leather tanned by the nano-composite tanning agent has a tensile strength, peeling strength and elongation at break improved by 51.8%, 8.2% and 13.3% respectively, has no obvious stratification or sedimentation during over 12 months of storage period.

所述复合鞣剂只需配入2％的铬粉，就可使皮革增厚高达124.5％，收缩温度达到95℃以上；其鞣革相较于铬鞣革，革的抗张、撕裂强度分别提高了51.8％和8.2％，断裂伸长率也提高了13.3％，存放期12个月以上无明显分层和沉淀。

Leather chrome shavings hydrolysate protease

皮革；铬革屑；水解蛋白质；蛋白酶

2709 Alkalic protease was used to hydrolyse dechromed chrome shavings , and the factors that may affect the collagen hydrolysis ratio, including the amount of 2709 alkalic protease, temperature, pH and time of hydrolyzing reaction, were studied.

在介绍胶原纤维形态特点的基础上，研究了铬革屑的打浆性能，初步确定了铬革屑机械打浆和化学机械打浆的工艺，并分析了铬革屑浆与植物纤维混合浆料的性能。

2709 Alkalic protease was used to hydrolyse dechromed chrome shavings , and the factors that may affect the collagen hydrolysis ratio, including the amount of 2709 alkalic protease, temperature, pH and time of hydrolyzing reaction, were studied.

研究了采用2709碱性蛋白酶水解脱铬革屑制备胶原水解产物时，影响胶原水解率的各种因素。

The leather waste contains protein of more than 70%, which is more difficult to be hydrolyzed by alkali.

成品铬革屑中蛋白质含量在 70 %以上，处理成小颗粒后与水、Ca 2 按 1∶4 0∶0。

The hydrolysis of chrome-tanned shavings modified by Cr-Al complex and the application of its product in tanning and retanning are discussed in this paper.

探讨了用铬—铝络合物改性铬革屑水解液及其产品在鞣制或复鞣中的应用。

Chrome in fodders, eggs, livers and lungs of hens that fed by common fodders is tested.

铬革渣主要由65%的蛋白质、%的Cr2O3和中性盐组成，是丰富的蛋白质资源。

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。