本文選題：鉻鞣污泥 + 鉻鞣劑　； 參考：《陜西科技大學(xué)》2015年碩士論文

【摘要】：皮革生產(chǎn)中的含鉻廢水處理往往會(huì)產(chǎn)生鉻鞣污泥,鉻鞣污泥的鉻含量大,并含有豐富的膠原蛋白多肽類物質(zhì),是一種極具利用價(jià)值的可再生資源。本文針對(duì)山東省濱州市沾化工業(yè)園區(qū)的鉻鞣污泥,分別采用了循環(huán)法和高溫焙燒法兩種方法提取了鉻鞣污泥中的三價(jià)鉻,并應(yīng)用于一浴鉻鞣。其中在循環(huán)法提取鉻資源的基礎(chǔ)上,進(jìn)一步萃取出了鉻鞣污泥中的膠原蛋白多肽,并將改性后的膠原蛋白多肽應(yīng)用于紙張?jiān)鰪?qiáng)劑。本文采用兩種方法提取鉻鞣污泥中的三價(jià)鉻,并分別研究了這兩種方法的最佳工藝條件和應(yīng)用,主要研究結(jié)果如下:(1)循環(huán)法:對(duì)富鉻污泥中鉻的提取作了研究,確定了分離劑和提取劑的配方,選擇了分離和提取鉻的最佳工藝條件。將富鉻污泥中的鉻提取為Cr2(SO4)3,并將其應(yīng)用于皮革工業(yè)中的一浴鉻鞣。結(jié)果表明:鞣制的牛皮藍(lán)濕革收縮溫度大于98℃,手感豐滿,從而為富鉻污泥的回收利用提供了行之有效的途徑。(2)高溫焙燒法:利用馬弗爐高溫加熱分解鉻鞣污泥中的油脂、膠原蛋白多肽,釋放出鉻鞣污泥中的鉻并加以回收。其最佳的試驗(yàn)條件為:加熱溫度750℃,加熱時(shí)間3 h。高溫分解后的鉻渣浸于p H=2.0的稀H2SO4溶液,減壓抽濾后得到純化鉻液,鉻回收率超過98%,有機(jī)物成分低于0.2%。純化鉻液配制成質(zhì)量分?jǐn)?shù)為3.5%(以Cr2O3計(jì))的鉻鞣劑鞣制皮革,牛皮藍(lán)濕革收縮溫度大于98.5℃,手感柔滑、豐滿,質(zhì)地均勻。在抄造紙張的過程中,多肽直接加入易使紙張發(fā)生卷曲,影響紙張的整體強(qiáng)度指標(biāo),所以需要對(duì)多肽進(jìn)行改性。故本試驗(yàn)探討以陽離子型聚丙烯酰胺作為改性原料,改性膠原蛋白多肽可以增強(qiáng)紙張強(qiáng)度。提取膠原蛋白多肽的工藝條件及應(yīng)用于紙張?jiān)鰪?qiáng)劑的研究結(jié)果如下:通過對(duì)鉻鞣污泥進(jìn)行酸性預(yù)處理,完成鉻與污泥的有效分離;在超聲協(xié)助下,用氫氧化鈉和氧化鈣的混合溶液提取出膠原蛋白多肽原液。用甲苯萃取出膠原蛋白多肽,膠原蛋白多肽液中Cr2O3含量低于70 mg/kg,灰分含量低于3%,膠原蛋白多肽提取率達(dá)40%。聚乙烯醇作為分散劑,膠原蛋白多肽液(CPL)經(jīng)過陽離子型聚丙烯酰胺改性,形成的改性膠原蛋白多肽液對(duì)紙張?jiān)鰪?qiáng)作用明顯。當(dāng)改性膠原蛋白多肽液用量為1.5%(對(duì)絕干漿)時(shí),紙張抗張指數(shù)提高26.7%,耐破指數(shù)提高47.2%。
[Abstract]:Chrome tanning sludge is often produced in the treatment of chrome containing waste water in leather production. The chrome tanning sludge contains a large amount of chromium and abundant collagen polypeptides. It is a renewable resource with great value. In this paper, chromium tanning sludge from Zhanhua Industrial Park of Binzhou City, Shandong Province, was extracted from chrome tanning sludge by recycling method and high temperature roasting method, and was applied to one bath chrome tanning. The collagen peptide from chrome tanning sludge was extracted by recycling method, and the modified collagen peptide was used as paper enhancer. In this paper, two methods were used to extract trivalent chromium from chrome tanning sludge, and the optimum technological conditions and application of the two methods were studied respectively. The main results are as follows: the extraction of chromium from chromium-rich sludge was studied. The formula of separation agent and extraction agent was determined, and the optimum technological conditions for separation and extraction of chromium were selected. Chromium from chromium-rich sludge was extracted as Cr _ 2so _ 4 so _ 4 ~ (3) and applied to one bath chrome tanning in leather industry. The results showed that the shrinkage temperature of tanned blue wet leather was more than 98 鈩，

本文編號(hào)：2007682