中华人民共和国国家标准——敌敌畏乳油

<正> 1 主题内容与适用范围本标准规定了敌敌畏乳油的各项技术指标及其检验方法和检验规则、产品保证期以及标志、包装、运输和贮存的要求。本标准适用于由敌百虫碱解法和亚磷酸三甲酯法两种工艺路线生产的敌敌畏原药与适宜的乳化剂和溶剂配制成的敌敌畏乳油。有效成分:敌敌畏化学名称:O,O-二甲基-O-(2,2-二氯)乙烯基(?)酸酯     

色母料载体树脂选用的探讨

使用色母料碰到最大的困难也许是如何把它适当地添加到材料中。本文中关注两个主要因素,分别是用于生产色母的载体树脂及其分子量,而它们往往是不能由购买色母料的公司所能决定的。     

色母料混合加工螺杆选用的探讨

早在1950年代,塑料加工行业就采用了往复式螺杆挤出机。相对以前作为塑料加工行业使用的标准活塞式挤出机,往复式螺杆对提高熔体混合、塑化效果取得了重要的突破,而且往复式螺杆挤出机的高产能也是其一个重要优势。在之后的50年里,加工设备设计采用了各种类型的混合元件和更大长径比的螺杆,对熔体均匀分散性取得了巨大的改善。     

Oilseed vegetable protein concentrates

Soy protein concentrates are articles of commerce in the U.S. and other areas of the world. The procedures for producing these products involve processes where the protein is “immobilized” by various procedures, whereby soluble materials such as carbohydrates, mineral matter, and other water or alcohol soluble constituents are removed. There have been four general procedures which have been used commercially, but recently a fifth procedure involving what might be referred to as a “triple” solvent procedure has been developed. While the commercial products available, at least in the U.S., are from soy, development work has been carried out to produce concentrate products from peanut, sunflower, sesame, and rapeseed. However, there are no commercial installations for producing protein concentrates from these oilseeds. A brief discussion of the various processes is presented.     

Superphosphates from Brazilian phosphate concentrates

Superphosphates were produced on a laboratory scale with two Brazilian phosphate concentrates from ARAXA and CATALAO. The evolution of reactions occurring during the synthesis was followed by analysis of the liquid phase (chemical analysis) and the solids (X-ray and chemical analysis). Results were acquired for the distribution of phosphorus among water soluble, citrate soluble and citrate insoluble compounds. They confirm the low reactivity of the phosphate of the studied igneous rocks. The determination of water insoluble phosphates Fe₃ (H₃O, K)H₈(PO₄)₆.6H₂O formed during reaction and curing processes underlined the main role of the impurities in the ore.     

Relative cost of enrichment-plant concentrates

Alternatives are proposed for calculating the relative value of coal and concentrate for the production of blast-furnace coke.     

Market boundaries for coking-coal concentrates

The construction of geographic and commodity boundaries is considered in relation to the Russian market for coking-coal concentrates. In this market, uniform commodities are purchased and used in mixtures with one another. Such commodities require special terminology and algorithms for the construction of the market boundaries. All Russian coking-coal concentrates should be regarded as commodities within a single market.     

Oilseed protein concentrates and isolates

Much attention has been focused on the oilseed crops as an alternate and largely untapped source of food protein in an endeavor to provide needed nourishment for large segments of the world’s expanding population. A significant part of this attention has been devoted to the practical concentration and isolation of the proteins of several oilseeds. As a result of intensive effort during the last decade, soy protein concentrates and isolates are now commercial commodities which are gaining increasing acceptance as useful functional and nutritional ingredients for food. This report is concerned with a brief review of the commercial processing, product characteristics and food utilization of soy protein concentrates and isolates. In addition, pertinent comments on the concentrates and isolates of other oilseed are included. One of 21 papers presented at the Symposium, “Oilseed Processors Challenged by World Protein Need,” ISF-AOCS World Congress, Chicago, September 1970.     

反渗透浓缩液的再利用

介绍了反渗透浓缩液再利用的方法,综述了这些方法的原理、特点及应用,重点讨论了脱除反渗透浓缩液过饱和度进行回用以提高系统回收率的方法,以及膜蒸馏技术对浓缩液的回用处理、废水浓缩液处理及海水淡化浓缩液制盐,指出了反渗透浓缩液再利用在经济和环境上的必要性。